mil-a-62247

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MIL-A-62247(A30 Armil 197SUPER51NGATPB40312 M%y 19EJ3

MILITARYSPECIFICATIONARM@EDF@COMUUSSANCE, AIRBORNEASSAULTVEHICLE:FUIL IRACKED,152JM,!4551AND M551Al (W/LASERRAiVOEPIND~ )(OVERHAUL)

1. SCOPE1.1 Sco .* TMs 8peciflcationpertainstofull-track > ampbiblow, cross-country,armoredone typeof air droppable,vehiclemountinga 152mmgunlauncher.2. APPUCA3LE DOCUMENTS2.1 The followlngocunentsof thefor bids or requests forproposals, formextentspecifiedherein.SPECIFICATIONSFederal

issuein effecton date of invitatia part of this qeclfication to the

W-F-8C0 - Fuel 011,Diesel.Mill-yMU-P-514 - Plates: Identification,nstructionsand klarklngBlank.~-G-13830 - OpticalCcmpnenti for Fire-ControlInstrume&s6enerslSpecificationGoverningthe Wnufacture,Assemblyad Inspectionof.MIL-A-62019 - ArmoredReconnaissance,AirborneAssaultVehicleM551; Rmeoelng for Stora@ ati Shlpnentof.MXL-R-50749(MU)- LaserRange FinderAl?WG-1.

FederalFederalStd. Ho. 595 - Colore.

Source: http://www.assistdocs.com -- Downloaded: 2013-06-11T08:35ZCheck the source to verify that this is the current version before use.

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MIL-A-62247(AT)Militm-yMIL-SI!D-10~kuL-sTm130IaL-sTD-lg3MIL-STD-21Om#-sl@+17MILSTD-461MIL-sm-642

PUBLICATIONS07364088736408

TB BED 269

OSHA Part 1910SULLEUIGH

SamplingProceduresand Tablesfor InspectionbyAttributes.IdentificationM%rk,ingof U.S. Mill@uy Property.FaintingProcedures, Tactical. VeMcles (TrackedandWheeled )..ClimaticExtreme for Miliq Equtpment.RubberCanpo8ition,VulcanizedGeneralPurpose,Solid (Symbolsad l fM)t8).Electrcm~tic, InterferenceCharacterstiesRequire-ments for Equipnent.IdentifIcationM%rkingof Administrative,Combat,- TacticalTranqmrt Vehicles.

EngineeringParts List for ArmoredReconnaissance/Airborne AssaultVehicle: FullTracked,152mm,M551.Master IA8t of SupplementaryQualityAssurancePro.visionsfor ArmoredRecomalssance/AirborneAssaultVehicle: Full Tracked,152mm,lfj51Carbon Monaxide,Syotems,Etiology,TreatmentandRevention of Overexposure.OccupationalSafetyand HealthStandards.

kfisslleSystemTechnicalRocedure 6829 . kiimile Guke and Can&ol

(Copiesofby 8U@lerS inMned fian the

SyetemCheckoutProceduresusingTest Set AN/MSM-93 forM551 Turret.specifications~standards,drawings,mxl publicationsrequircxlconnectionwith specificprocurementfunctionsshouldbe ob-promming activityor as directedby the contractingofficer.)

3. REQUIREMENTS3.1 Firstoverhmkd vehicle. The fi&t overhauledvehicle,which shallbe fullyrepresentativeof vehi.. cles proposedto be furnishedunder the contract$slall.be submittedto the Governmentfor inspectionto determineconformanceto the requirementsof this specification.3.1.1 Workmanshiparrlmatmrials. The workmanshipshmllbe of quali~to assurethatthe overkwkd vehicleand canponentsthereof are free from anydefectsthat canpranise}limit,or reducethe vehicleor componentcapabilitieshereinexpressed. Vehicles overkuled in accordancewith this specifIcationshallbe subjectedb examinationsand teststo provevehiclecapabilitiestoperfctrmIn accordancewith the folkuing:

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ME-A-6224T(AA. Reliability (Failureper Joint CDC/AM2 Definltlon, dated ~ W ?2)

1. Vehicle (Mobility)0-1500odome~ miles;MesnMflesBelzreenFailures(MMBF)not lthan 1000, 1500-3200dometermiles;P4MBFnot lessthan 7 0 02. Time dependentequipnent(fire,turret,~idance controlsystetest equi~ent, visiondevicesand all nonmobilltyequi~ent)3. CcnponentLife(a) Engineand trsnamissionccmbinedO-3200odometermiles;MMBF not lessthan 5000(b) Gun launchersystem (exkding tube)0-500rounds;MeanRoundsBetieenFailures(BRBF)not less t200(c) Tube life to be 200 effectiveroundsminimum

B. Maintainability1. The totalscheduledmaintenanceexcludin&serviceshallnot exceed1.80manhoursandmaintenanceshallnot exceed 3 . 25 manhoursoperation.

driver/crew.heckandthe totalunscheduleduring 5 0 0 0 miles of

2. Eachmaintenancerequirementshallnot exceedthe following:(a) Crew (24 hour day or 0.100miles) = 30 minutes(b) Scheduledmaintx!iance3 days or 300miles) = 30 minutes(c) Schedulemaintenance(9days or 900 miles):30 manhours(d) Wan maintenancetime (unscheduled)z 4 clockhours.

3.1.1.1 Vehicleoperation. To assurethatworkmanshipand materialsrequlrementaare met dur~ the 3,200miles of vehicleoperationthe vehiclecbat loadedor with sinnd.atiload of equalweightshalloperateas follows:(a) 20 percenton paved roads,ei*r concreteor asphaltor any combinationof the two.(b) 20 percenton gravelati dirt roadswith at least10 percentof thisdistanceunder(c) 30 percenton levelcross-country(d) 30 percenton hillycross-country

mud coalitions.terrain.terrain. .

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MIL-A-62247(AT)3.2 Mtertals.3.2.1 Ozone resistance. U.alessotherwisespecifiedon detaildrawings,rubbercomponentswhich are subjectto tensionor flexureshallbe ozone re.slstantto the degreerequiredby the Cl testrequirementsof MIL-STD-417.3.2.2 Qualifiedproducts. With respectto all assemblagesnd componentsparts requiringproductqualificationin accordancewith the pertinentspecifica-tionsor drawingslistedon the EPL cited.in 3.3, and necessaryin the construc-tion of this vehicle,the contractorshallbe responsiblefor using only thoseproductswhich are listed(by part or drawingnumberas QPL items)on the QPLor which havebeen approvedfor inclusionon such lists. Contractorsinspectionrecordsshall specificallylist such component(s),wme of supplier(s)(as listedon the (JPLor in the approvalletter),and numberad date of the QPL fromwhichthe selectionwas made or date of approvalletterwhen productsare ap~ovedbut not as yet listedon the wL.3.3 Overhaul. Vehiclesshallbe overhauledin accordancewith contract,technicald~kage end this specification.When new partsare required,they shall conformto specifications,standardsaml drawingslistd fn EPL8736406. All partsrequiringtdentificationshallbe identifiedin accordancewith hfnesTL1-1303.3.1 Sealingand seals. After operationin water,the water contentof the lubricantsin the sumenslon sYstemshallbe not more than2 m?rcent(byvolume). Also, seals sl&llrestrictleakageof internallubric&s frombearingsto an extentno greaterthan specifiedin 6.4(b). Staticfit Jointsshallbe adequateto preventexcessive1eakageof water intothe vehicle.3.3.1.1 Eatch seals. With hatchesclosed,sealsshallrestrictthe entranceof externalwater intothe occupiedportionof the vehicleto an extent no greaterthan specifiedIn 6.4(d).3.3.2 Smcial kits. When specified(see6.2)vehicleswith the followingS~Ci81 kits, shallhave the kits removed,overhauledand reinstalled.3.3.2.1 Winterizationkit. provisionsshallbe made for installationof the winterization kit. When the kit is Installedand operating,standbyheat shallbe providedby the kit to maintaintemperaturesof enginecoolantand battery electrol~. Enginestart-upshallbe assuredafterextendedshutidown periods in ambienttemperaturesbetweenminus 250F and minus 65F.3.3.2.2 Collectiveprotectorkit. All vehiclesshallbe equippedwiththe componentsrequiredfor installationof the collectiveprotectorkit. Whenthe kit is installedand operating,with a minimusvoltageinputb the filterassenblyof 27 volts DC, a mi.nlmumof 3.5cubicfeetofairperminuteshallbe supplledto each of the four installedpersomel masks.

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3.3.3aL1.mountswater into

MIL.A-62247(ATVisiondevices(excludi~ telesccpemount). won installationofand Governmentsupplieilisiondevices,the entranceof externalthe vehicleshallbe restrictedso as to not exceedthe amountspec.ified in 6.4(d). All visiondevices/opticalequipmentshallbe free cf digs,chipsand scratchesin accordancewith MIL-o-13830.

3.3.4 Cs,rbonmonoxideconcentration.The comblnati.onf the vehicleexhaad ventilatingsystemsshallpreventthe accumulationof carbonmonoxideinthe occupiedportionsof the vehiclein excessof 0.005percent.3.3.5 Controls. Ccntrolsfor the engine,tianamission,electrical,quip-ment, armsme~ther mechanisms,as vehicleinstalledand adjusted,shalloperatewithinthe rangesspectfledon applicabledrawings.3.3.5.1Throttlelhkage. Withthethrottleltnkagefnsfalledand theacceleratorpedal1%1.lydepressed,the governorthrottleshaftshallbe at fullopenpositionand the acceleratorpedal shallbe in ccntactwith acceleratorpedsl stop.3.3:6 l&tchmechanlsms.ith the vehicleon level terrain,the followinrequirementsshallbe met.3.3.6.1Drivershatch.The forcereqtiredto rotatethe unlatchedhatchto the full.openpositionshallnot exce?d35 poumiswhen appliedto the hatchlockinglever.3.3.6.2 Loaders hatch. The force required b open the unlatihed hatchshall not exceed 30 pou.mlswhen appliedto the edgeof the hatchoppositethehinges.

. . 3.3.6.3 Esca+ The forcerequiredto unlatchthe escapehatchehallnot exceed O poutiswhen appliedto the eti of the hatch lockinglever.3.3.6.4 Batteryaccessand alr cleaneraccessdoors. After unlatching,the forcerequiredto open the batteryaccessdoor ehallnot exceed30 pcnnrls,and the forcerequiredto open the air cleaneraccessdoor shallnot-ex~eed -~ pouds, when these forcesare appliedto theirrespectiveliftinghandles.3.3.6.5 Camaandershatch. The commanderssplithatch shallbe ca~bleof attainingthree open positions: go degrees,135 degreesand 180 degrees.The forcer~qtied ~ op&n the unla&ed ~atch-6h&l.l~tappliedto eitherhatchcoverat the splitline.3.3.7 ~eatlq. With the vehicleon levelterrain,ments shallbe met.

exceed30 po&s when

the followingrequire-

3.3.7.1at the end ofWith the seatDriversseat. With the seat occuDled.the actuatiruzorcereaufthe foreand aft seatadjustmentl~vershallnot exc&d 12 pou&s.unoccupied,the actuatingforcerequiredat the end of the vertic

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MIL-A-62247(AT)adjustmentlever shallnot exceed35 POIUXIS.The back rest shallof beimz folded in to the seatw and men, won SMMUalac~tion

be capableof the releaselever,he seatassemblyshall-iwe inlzati &maln in its verticalposition.

3.3.7.2 Gunners seat. When unoccupied,the seatshallbe free of bindingtln-oughoutts operatingrange. With the seatoccupied,the forcerequiredto pull the fore and aft adjustmentpin shall n ot exceed10 poumls.

3.3.7.3 Ccmnwxlersseat. With the seatunoccupied,the pin disengagingforcerequiredat the emilof the seat adjustmentleverehsllnot exceed35 p o um l s .With the seatunoccupied,the seatpan shallmove into,ad remainin, its verti-cal position. With the seatunoccupiedand in its lowestposition,the seatSW be capableof beingad$ustedupwarda minimnsnof 11 inches.3.3.7.4 Iaade.rsseat. With the seatunoccupied,the seatpan shallmoveinto,and ressalnin, itsverticalposition.3.3.8 Fuel system. The fuel tank,conkining 10 to 15 gallonsof fuel,shallmainlainfuel supplyto the enginewhen the vehlcle is aacendingand des-

cending60 percentgradesin f~ @ reversegears,and when the vehicle$s operatedon 40 percentsideslopes,with each sideof vehicleup slope.3.3.6.1 Fuel tanks. Provisionsshallbe made to assure the internalclean-linessof the fuel tanksprior to initialfuelingof the vehicle. The fueltanks shallbe capableof receivingfuel at an averagerate of 50 gallonsperminute (gpu).3.3.8.2 Fuel lines. Provisionsshallbe made to aasureinternalcleanli-ness of fuel l~ouctions prior to initialfuelingof vehicle. FuelMnes and connectionsahsllnot leak after Insolation ati aftervehiclebresk-in run.3 .3 .9 coolingSysa . The enginecoolanttemperatureand the engine-and

transmissionhibricanttemperdure~ ohallnot exceedthoseshownInl%blkIwhen the vehicleIs operateduder the followingcondition:Ambientair teuprature up to l&F, under full Ioed in firstgnar converterat a speedof 3 milesper hour.

Table 1. OperatdngtanperaturescoolantTemp. EngineOil hmnsmiseionfrcm En@ne Temp. in Sump Oil Temp. into Cooler230F Max* %@% Mu. 325% Max.

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MIL-A&?247(AT)3.3.1O ElectricalByB%Cm. The electricalsystemshallbe a nominal24volt (de) SySte?fl.3.3.10.1 Generator. The generaturshallhave the capacityof furnishing300 amperesat q??? volts at an enginespeedof 7 5 0 r pm or higher.3.3.10.2 Voltagere@ator. The voltageregulatorshallregulategeneratoutput,as meamred at the batteryterminals,[email protected] volts throughoutthefull enginespeedrange,and with generatoroperatingwithin itsrated capacity3.3.20.3 Ughts. The internaland externalvehicleId.ghtsshallbe operabunder all vehic=rating conditions.3.3.10.4 Bilge pumpmotors. Bilge pumpmotorsshalloperateon the electcal power suppliedby the generatoror batteries.3.3.10.5Personnelheater. The heatershallstartati operateon 24 volts3.3.~0.6Electiiccontictring(hullto turret).lheai n electrical

SYS* supplyvoltageshallbe made availableto the turretthroughthe contactring and there shallbe continuityof the cczsmunications,ow er and groundcir-cuits throughout360degreesof turretrotation,ithoutevidenceof shortcircu3.3.10.6.1 Electriccontactring noi se. The operationof the ccntactring shall not introduceobJection~le noiseor staticinw the conmwdcatlonsystem.3.3.10.7Gun fIringcircuits The main gun fIringcircuitsand the coaxIamachinegun firimgcIrcuit8hallexhibitcontinuity.3.3.~ ?ersonnelheater. The personnelheatershallbe capableof cperation fuel conformingto Grade DF-A amlDF-1 of VV F 800.3.3.12 Stowageprovisions. With the On VehicleMaterial(OVM)combatloadedfn spacesprovided,the stowedequipnentshallnot interferewith theoperationof the vehicleor its components.

.3.3.13Weldfngrepairsad burning. Weldingrepa$rsof any type or classshallbe made onlywhen, d to the extent,specificallyauthorizedby the procuing activity~exceptfor in-processweldingrepairsto non-ballisticor non-structuralmembersmade necessarydue to nonconformanceto drawingor weldingspecifications.3.4 Break-inrun.3.4.1 Preprat~on.Priortobreak-inrun,thevehicleEhall.e complete

assembledand all sd$ustientscompletedexceptfor those itemsof Instillationand servicewhich are performedby the contractoras part of the finalvehicle

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m-AA.2247(AT)procesalngfor acceptice and shlpnent. The vehicle(includingall componentsrequiringIubricatlon)shallbe lubricatedin accordancewith productionlubri-cationdrawing10953937,a detailof EPL 6736408,and provicieatth fuel con-rmmng to W-F-tX)O. Specificgraes or typesfor expectedseasonaltemperaturerangesshallbe used.

3.4.2 Oil pressureand temperature. Prior to the st.artofthe break-inrun, the engineshallbe operatedat idle speed,between650 and 700 rpm, untillubricatingoil is at safeoperatingpressureand temperature,as indicatedby controlpanel lightsor gs&es. If at any timeduri~ the break-inrun theenginehas been stoppedfor at least30 minutes,the engineshallagainbe oper-ated as shove,before continuingbreak-inrun. Nonnd oil pressureand temperatureshalJbe maintainedduringoperationon levelgroumi,60 percentgradesandhO percentside slopes.3.4.3 Operationand distance. Each vehicleshallbe broken in by drivingforwardon smooth,level,hard-surfacedroads,exceptthata localizedsectionof the road shallbe ae shown in figure1. The vehicleshallbe operatedineach directionfor one-halfthe totaldistancespecifiedin a and bdivisions

of Table 11, includingthat localizedsectionof road shownin flgure1.Table11. Speedsazxldislamcesfor break-inrun

Division Speea Distanceof run mph milesa o to 10 5b 11 to 20 5c 21 to max. governed 10

3.4.4 Reverseoperation. Aftereach divisionof thebreak-inrun,vehicleshallbe stopped,the engineallowedto idlefor not lessthan2 uinutes,andthe vehicledrivenin reversefor a distanceof not lessthan50 feet.3.4.5 Conditionafterbreak-inrun. After completionof thebreak-inrun, thereshallbe no evidenceof dsmsgedcomponentsor of maladjustmentsthatmay causefaultyvehicleoperation.3.5 PerformanceA completevehicle,ccanbatr simulatzd10EKM and ser-viced,shallperformas speci.fed herein. The vehicle,servicedand equippedfor exlstlngcl$maticconditions,shallperformas specifled herein,withoutspecialequlpnent. Unlessotherwisespecified,performanceshallbe demonstratedon smooth,level,hard-surfacd roads free of 100= ~terial, excepta sectionof read sha33be a8 shown In figure1.

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MIL-A-62247(A3.5.1 Ehvlronmental. The vehicleshallbe operablein ambienttemperavaryingbelxeenplus 12&Xand minus 50%, exceptthatbelowm inus 250F speciklt (see3.3.2.1)shallbe used to assurestartingand restartingof engine.The completevehiclewhen in storageshallwithstandclimaticextremesof plu155% and minus 65F,withoutdeteriorationthatmay causefailureof any com

nent of the vehicle,and applicableportionsof MIL STD-21O.3.5.2 Powertrain. The powertrain,inclwilngits associatedcontrolsshallbe operable hroughoutall gearand speedrangesand under all steerinand brakingconditions,withoutbindingof Hnkages and-withoutloss of lubrcants to an extent-greaterthan specifled in 6.4(b)3.5.3 Bilgepumps. The bilge pumps shallbe capableof r emov i n g waterfrom the vehtcleaa follam:

(a) Frontpump - 35 gallOnsxr minuteagainsta dischargehead of 6.0 feet.(b) Rear pumps - 45 gallonsper minuteper pump againstadischargehead of 6.o feet.3.5.4 Speeds,accelerationandbrakingability.3.5.4.1 .Sustd.nedspeed. The vehlcle shallbe o~rable at a sustainedspeedof 30 mph and shallmaintaina speedof 2.5 to 3.5 mph in lowestgearwithouttowedload. With the vehicletravelingbetween25 mph and maximumspeed,the drift fran a straightline shallbe not more than 3 feet in 100feet.3.5.4.2 ?&xlmumspeed. The vehicleshallbe opershleat a speedof notlessthan40 mph at an enginespeedthatdoes not exceedthe maximumfull loagovernedengineoperatingpeedof 2800r~.3.5.4.3?lt.nimwapeed.Thevehicleshallbe operableat a speedof notmore than 2.5 mph for a periodof not less than 30 minutes.3*5.4.4 speedswith towed bad. The vehtcleshallbe capableof towina track-lsying$free-rollingvehicleof equalweightat a speedof not lessthan18 mph and shalloperateat a sustainedspeedof 15 mph. The vehicleshalsobe capableof attaininga minimumspeedof 2.5 mph wIth towed loadon leand hillycross-countryterrain.3.5.4.5 Acceleration.The vehicleshallaccelerateIYoma stading stato 20 mph I n not more thsn 9.0 seconds.B.5.4.6 t%,qpi~. When traveling at 20 uph, the vehicle shall be a~opp

by application of the service brake within 45 feetfranpointof brake applition. Vehicledriftduringstoppingshallnot exceed3 feet.

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MIL-A-62247(AT)3.5.4.7 Holding. When the vehicleis standingon a 60 percentlongitudinalgradewith the parkingbrake applledand locked,the transmissionin neutral,and the enginestopped;it shallremainstatdonarywen headedup and down ~ade.3.5.5 Turning.When controlledby gearedsteerand when traveling at

a speed less than 10 mph, the vehicleshallmake continuous360 degreerightand left turns,with the rearpoint of the ou t er ed ge of the vehicleremainingwithinan 80-footdiametercircle. Underpivot stiercontrol,the vehicleshallbe capableof being pivoted360 degreeswithina 30-footdiametercircle.3 .5 .6 S l op e a n d gr sd e performance. The vehicleshallascendati descendgradesup to 60 percentand operateon side slopesup to 40 percent. The vehicleskillslso maintaina sustainedspeedof 15 mph when ascendinga 10 percentgrade on a hard surfacedroad.3.5.6.1Enginestartingon gradesand sideslopes. With the vehiclestand.ing on a 60 percentlongitudinalgrade for not lessthan2 minutes,ati withthe engine idHng between650 ad 700 rpn, the engineshallbe stoppedfor notless than2 minutes. The engine shallrestartin not more than 1 minutewhen

headedup grade and when headeddown grade. A similar engineSfartlngoperationshallbe conductedon a 40 percentside slopewith each sideof vehicleup slope.

3.5.7.1 Flotationoperation. The canbator simulatedloadedvehicleshallflost in cah water of 7-footminimumdepth.3.5.7.1.1 Surf%oazdad bsrriersystem. Afterwith the surfboardand barrierequipmenterectedatithe vehicleshall.not have accunfiatimore than onethe hullbottom. The accumulationof water shallbeon level terrain afterremovslfrcmthe water.3.5.7.2 Speed. When afloat In cah w~ter, thespeed of not l~han 3.5 mph, excltiingthe effect

15minutesof floatingwith the bilge pumps off,inchof water depth inmeasuredwith the vehlcle

vehicleshallattainaof current.3.5.7.3JMrections3tability. The vehicleshalloperatewithina 30-footcorridorwhile c r ossi n g cd i s , openwater,excludingthe effectof current.3.5.8 TYenchcxossing. Wlienoperatingat low speed in fonmrd gear, thevehicleshallcross trenchesof 36 inchesminimumdepth up to 84 Incheswide,WIChoutdamage to the vehicleor its components.3.5.9 Verticalobstacles. When operatingat low s~ed, the vehicleshallcrossover verticalobstacIesup to 33 inches in heightin forwardgear andup ta 12 inches

its caqcments.I n heightin reversegear,withoutd&nage to the vehicleor

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.........,.....

3.5.10requirements(a}(b)(c)

3.5.20.1

MiL-A-(i2247cupola. Unlessotherwisespecified,the cupolashallmeet allspecifiedhereinunderthe followingcorklitions:Cupolalevelwithin one degree.

+systemsupplyvoltage27.5 0.5 wits (dC).Cupolaconibat(orsimulated loadedand vithhatchfollyOpen.Power controls. M551and ?fj5)Alehicles.

3.5.10.1.1 Traverseandgunfirw. The traverseswitchesand gun Iirmechanismshaldbe capableof stiul~eous we. With hatchesclosed,travershallbe accomplishableby means of a slewingswitchprovided.3.5.10.1.2 Poweredtraversingaccelerationand speed. The cupolashalbe capableof ccntinouspoweredtraversein eitherdirection. From a standistart;the cupolaskillbe capableof traversinga minimumof gO degreesin3 seccnds. After a uniformtraverserate is achieved, the speed rate shallbe 10.5RPMplus or minus 1.5 RPM. Poweredoperationshallnot exceed2 min

in any 12 minute period.3.5.10.2 Powerccntrols. M551 Vehicleonly.3.5.10.2.1 ControlPanel. With the on/offswitchin the offpositcupolatraversesha1+ be electricallyinoperable.3.5.10.2.2 Electric.conWctring noise. @e o~ration of the contactring shallnot introducenoise or staticintothe communicationsystemat alevelwhich preventsInterpretablemessagereception.3.5.10.2.3Electrfccontactri% (turretto cupola).Themalnelectrsystemsupplyvol%ageshallbe made avaihabl to the cupolathroughthe contring and there shallbe uninterruptedlectricalcontinuityof the communica

power aml groundcircuitsthroughout3~ degreesof cupolatraverse,withoutevidenceof shortclrcults.3.5.10.2.4 Manualtraverse. With the manualtraversecontrolhandleithe operatepositionthebrake shallbe releasedpermittingmanualtraversof the~cupola.3.5.10.2.5 ManualtraverseInterlock. An interlockshallelectricaloperationwith the manual traversecontrolhandleinpoeition.

preventcupothe engaged

3.5.10.2.6 Manualtraverseeffort. When the manual crm is ra~be~in eitherdirectionat a uni!fonurate,the averageforceaPPlied~%entiallyat the eml of the handleshallnot exceed30 lbs at smbienttemperaturesof32% and above.

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MIL-A-62247(AT)3.5.10.3 Powercontrols. M551AlVehicleonly. (W/LaserRange Finder).3.5.10.3.1Cont rol panel . on/offswitchin the offpositioncupolatraverseshallbe electricallyinoperable. A momentarycontactcupolaalfgnswitchshaldbe providedwhichwhen activatedwill cause the cupolato traverseto an Idx positionwhich is repeatableto within~2.3.5.10.3.2 Remoteswitch.Shallbe providedon the commandersturretcontrolassemblywhich will have the same functionas the cupolaalign switch.3.5.10.3.3 Electricaleontactrlng (turretto cupola). The main electricalsystemsupplyvoltageshallbe made availableto the cupolathroughthe contactring at currentlevelsufficientto operatethe AK?/VVG.laserRange Findersystem,and there shallbe UJZintirrup= electricalcontinuityof the powerarri@oumi circuitsthroughout360 degreesof cupolatraversewithoutevidenceof shortcircuits.3.5.10.3.4.Manual &averse. The cupolashallbe equippedwith a handcrankfor manualtraverse.3.5.10.3.5 Lockingmechanism. The manualcupolatraversingsystemshallact as a travel lock for the cupolaw hen t h e vehicle1s dfivencross country.Cupolamovementshallnot be tranamittd to the hamd crankwith the lockre.leased.The lock shallautomaticallyreleasewhen the cupolais operatedinthe powermode.3.5.10.3.6bual traverseeffort.Whenthehandcrankis rotatedineitherdirectionat a uniformrate the averageforceappliedtangentiallytothe crank to maintin cupolatraversemovement shallnot exceed 15 lobs. Noirxlividualeadingshallexceed17 lbs. At uniformhandcrank speeds,the cupo-la traversingoperatorshaldbe chatter-free.3.5.IJ tiverseandgunfirecontrolsystem.Unlessotherwisespecified,

the followingequirementshal1 be met with the turretrace ring levelwithinone degree.

3.5.Il.1 bet controli3ys*.3.5.11.1.1 Manuqltraverseeffort. When the handcrank is rotatedineitherdirectionat a unlform rate, the averageforceapplied@ngentially tothe crank to maintainturn-ettraverseuovementshallnot exceed J 4 p ou nd s.

No Ixxiividualead- shallexceed17 pounds. At uniformhsnd crank speeds,the turrettravers$~ operationshallbe chatter-free.3.5.u.I.2 Wnud elevatingeffort. When the gun ts elevatedor depressed,the averageforce applid tangentiallyto the hand crankto maintaingun movement

in either tlirectlonshall not exceed U PO-8. No lmlividual rcsdtng 8ha21exceed 17 pounds. At uniform htuxlcrank speeds, the gun elevation and depressionoperations shall be chatter-free.

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MIL-A&2247(A3.50XJ..1.3Manusltraverseratio. One revolutionof the hand crank shrotatethe turreta minimumof 10 tnils.3.5.11.1.4 l&nualelevationratio. With the gun at horizontalpositiplus or minusone degree,the gun shallelevateor depressat aminimum of 9roilsper revolutionof the hand crank.3.5.11.1.5 Systembacklashandcompliance.With the turretpoweroffthe systembacklashand complianceshallnot exceed1.0 mil in traverseand1.0 ISllin elevationwhen a perpendicularforceof 100 LIO poundsis appliein the plane of rotationat the muzzle end of the gun. The sum of the backand complianceshsllbe that total angularmovementof the turretwith respeto the hull in traversed the gun shield(or gun mount)with respectto thturretin elevationmeasuredwhen the forceat the end of the mm is revers

offThethe

appliedin the oppositedirection. .3.5.I.I..I.6owertimsnual control. The gunne r s firingtriggers(mapower)shallfunctionwith the turretcontrol power switchwither on orand with the fire control selector switch In any posi.tfonother than offpropertelescopereticle@hallbe displayedwith the selectedpositionofire controleelectorswitchand the vehiclemasterswitchon. When themain gun IS selected,the firingswitch(trigger)shallenergizethemain wecircuitry. When the auxiliaryis selected,the firingswitch (trigger)shalenergizethe coaxialmachinegun solenoid. The manualfiringswitchlocateon the elevationhand cr an k sh al l performthe samefunctionas the gunnersfiringswitch.3.5.11.1.7 Overr3decontrol. When operatingin power control,and theovemide switchin the ccmmanderscontrolhamlleis actuated,it shall insttaneouslytake over the power controlof the turret,gun ati firingcircuitfra the gunnercontrol. Overrideof the systemcont~l by the cummanderscontrolshallbe obtainableregardles6of the hati,lepositionof the gunnercontrol. With the ccrnmandr and gunnercontrolsin the neutralposition,thshallbe no movaent of the gun or turretcausedby depressingor releasingthe overrideewitihin the camnatierscontrolhaxlle. The gunnerscontrol

shall regainayetem controlinstantaneouslyhen the commanders controlhaIs released.

3.5.11.1.8 Controlsystemdesdspots. The turretad gun controlSYS-deaaspot,as measuredat the gunnerarxlccmmanderpowercontrols,shallnotexceed3 degreesharxilemovementfrom the neutralcenterpmitlon in eitherdirectionin order t o i n i t i a t e turretmovement;ad, shallnot exceed3 degrehandlemovanentfrcm the neutralcenterpositionin eitherdirectionin ordeto initiategun elevationor depression. The neutralcenterpositionshallbe definedas that hamXlePositionwhichdividesthe initial.ree handlemovin half.traverse

The desdspotangleseach sideof the neutralcenterposition(inbarxlelevation)must be equalwithin one degree.


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MIL-M52247(AT)3.5.1.1.1.9Gun elevationspeeds. The gun shallbe controllablen elevation&ml depression at all speedsfrcxn0.5 to 71.0roilsper second. The elevationspeed shall increase,with increasedhsndledisplacement,frcm 0.5 mil per secondat 2.5 ~1.O degreehandledisplacementto 23.0roilsper secondat 20 ~ 2.0degreeshandledlsplacanent.The slopeof the responsecurveat the 0.5 mil

per secondpoint shallbe 1.0 ~ 0.1 mil per secondper degreeand shall increasesmoothlyto providemi.ntiumof 71.0mila per second,(4 degreesper second)at maxtiumhamdledisplacement.The systenshallremainstableat all times.Theserequirementsare applicableto both gunnerati cmmander power controls,in the non-stabilizeduode only.3.5.U..1.1O Turrettraversingspeeds. The turret shallbe controllablein traverse at all speeds fran 0.5 to 427 roilsper second (4 rpm or 15 secorxlsper revolution). The traversespeedshallincreasewith increasedhaxxlledisplace-ment, fran0.5 mil per secondat 2.25~ 1.0 degree to 32.0roilsper secondat50 ~6.0 degreeshanlledisplacement. The slopeof the responsecurve at the0.5 mil per secondpointshallbe 0.5 ~0.CY75mil per secondper degreeandshall increasesmoothlyto providea minimumof 427 roilsper secondat maximumhandledisplacement. The systemshallremainstableat all times. Thesere-

quirementsare applicableto both the gunnerand commanderpowercontrols,inthe non-stabilizedmode only.3.5.11.1.11 Traverse,elevationand depressionstepresponse. With theturretcontrolpower switchturnedon, the gun raw responseto step inputsresultingin steady-stiteratechangesfrcm zeroto 25 ~ 5 roilsper secondandfrcm 25 ~ 5 roilsper secondto zero in each directionof traverseand elevationor depressionshallexhibitan overshootof less than 50 percent,followedbys.nundershootof lessthan 40 percent,and be dampedto within~ 12 percentof the steady-stateratewithinone-halfsecondof the timethe step input fs

a pp l ied . Upon applicationor removalof the step input,the gun and turretresponsesshallmove to 66.6 percentof the finalmeasuredvaluewithin .075seconds.3.5.U.l.12 Elevationsystemprotection. Thereshallbe no damagetothe conixolsystemor ts canponentsas the result of operatingthe gun at fullspeedagainstthe elevationor depressionllmit switchstopsby power control,or againstthe mechanicalstopsby manualcontrol. Limitswitchesshall inhibitelevationand depressionratesof the weaponprior to contactingthe mechanicalstops.3.5.U.1.13controlshallbeso as to preventstructureof theprojectilesfrcxu

Interferencezone When power traversingthe turret,autunaticprovi.dd to elevatethe uain gun over portionsof the vehiclethe gun frcxnstrikingthe sidesof the vehicleor the uppervehicle(withflotationequipnentotowed),and also to preventstrikingthe hullwhen main gun or secondaryarmsmentis fired.

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MIL-A-62247{A3.5*U.1.14degreesofmanualElevation and depression r-e and MmSts. Throughout 360traverse,hegunsM.1 be capableof being elevatedto belw19.0 and 19.5degreesand of being depressedto at least2.5 degrees. The angmovementof the gun parallelto the planeof the turretracering shallbe inaccordancewith the follouingrequirements:

(a) Between7.0 ati 8.5 degreesdepressionfor at least 126degreeseach side of vehiclefrcxnfrontcenterline(by powercontrol) andbetween8.0 and 8.5 degreesdepressionforat least1.37degreeseach sideof veh,ic frontcenter-line (bymanualcontrol).(b) At least3.5 degreesdepressionfrom43 degreeseachsideof vehiclerearcenterlinebymanualcontrol).3.5.11.1.15 @m - on movi~ target. The timerequiredto lay thegunsightreticlewithinthe bordersof a movingtargetfrom an establishedleaangle shall not exceed3.5secondsunderany set of conditionsspecified inTable 111. After the reticlehas been positionedwithinthe bordersof thetarget,the reticleshallremainwithinthe targetfor the completionof therun In accordancewith percentageof timeon targetspecifiedin Table IV.This requirementshallbe met by the gunnerpower controlsonly. When rangedistancesshmn in Table 111 are not available,it is permissible to substitanotherdistance,preferablygreater,providingthat targetspeeds,targetdimions, and coursedistanceare changedproportionately.

lkible111: Gum hying on movingtirgetTraverse Established Target Tsrget LengtRate bad TargetSize Range Venclty CoursMils/Sec Mile Mlls Centlmetcrs Meters mph Meter

0.5 1.0 0.25 45.721.25 228.60::; ?:; 1.25 228.6020.0 1.25 228.6019:6 7.5 1.25 $.:;32.6 10.0 1.2565.2 20.0 5.0 137:1670.1 20.0 5.0 137.16

1828 J)X28 .81828.01828.8274.32274.32274.32271+.32

2.04.013.540.012.020.040.0&3.o

45.791.4W2.8lP2.365.365.365.365.

NOTE: Tkteraverse rates shown i n Table III are approximateradialtrackvalue= the targetsat the speclfied velocltiesad ranges. The traverserate values (roilsper second) are to be utilizedwhen testingWIth a turrettracki.n$nstrument,and are not to be eqwtid to the targetpositionsat givevelocities,timesand ranges.

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ML-A.62247(AT)3.5.u.1.16 Krget trackingaccuracy. Underactualor simulatedccnditlons,the gunnerand commander powercontrolsshallmeet the mitium requirementsfor targettrackingas specifiedin Table lV Targetshallbe squarefrIsizeas specifiedIn Table IV and shallbe moved on a straightcrossfngcourse.

When range dislancesshown in Table IV are not available,it Is permissibleto substituteanotherdistance~prefer~ly ~eater, providingthat targetspeeds,targetdlmensions,and ccursedistanceare changedproportionately.Table IV. Trackingaccumcy

%of Traverse T%rget T~~t tingthOfTime on Rate TargetSize Range velocity CourseTarget Mils/Sec Mils Centimeters Meters mph Metersw100100100100100100100

0.5 0;25 &5.721.25 228.60;:! 1.25 228.609.8 1.25 22t?.6019.6 1.25 34.2932.6 1.25 34.2965.2 5.0 137.1670.1 5.0 137.16

1t32881828.81828.81828.8274.32274.32274.32274.32

2.04.013.54C.O12.020.04C.O43.0

~5.T291.44162.80182.88365.76365.76365.76365.76

NOTE: The traverserates shown in Table IV are approximateradialtrackingvalue= the targetsat the speci.fedvelocitlesati ranges. The traverserate values (roilser second)areto be utilizedwhen testingwith a turrettrackingInstrument,and are not to be equatedto the targetpositionsat givenvelocities,ttiesand ranges.3.5.XL1. 17 Gun b.ylngon stationarytarget. From a ~Wff Position~bu-lated in Table V, the averagetime requiredfor a totalof 4, 8, or 12 trialsto positionthe gunstghtretfclewithin the bordersof a 0.25mil squaretarget

shall not exceedthat tabulatedin Table V. The time for layoffpositionnumber3 shallbe met for an equalnumberof trailsfrom each of fourdirectionsfromtarget. The time of all other layoffpositionsshallbe met for two directionsfram target. These requirementsapply to gunnersst.attonnly, as stlp~latedin Table V. The resultsof any one seriesof trailsshallnot be used tn anyother ser ies .


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MIL-A@247(AT)

.

~ble V. Gun layingon stationarytargetLAYOFF- MJZS AVERAGETIME - SECONDSElevationPosition Azimuth Depression PowerControls ManualContr

. 2354.514

3.5.~.1.18 T~=t ~ w controlSYS*, operat fon on skme. when thevehicleis cantedor pitchedon 810pe6up to and including10 degreesturretattitude,the turretand gun controlsystemshallmeet the requirementsof3.5.u.1.8, 3.5.u.1.9, 3.5.I.I..10,3.5.11.1.15,3.5.11.l.16a~3.5.11.l.17,exceptthat time ltiitationsof Table V may be ,triple.The turretand gun consystemperformanceson levelterrainshallnot be affectedin any mannerasa resultof vehicleor controlsystemoperationon slopesup to and including15 degrees. TWret chat ter shal l be alluredonlywhen turretunbalanceterxisto cause turretrotitionin the samedirectionas manual traverse.

3.5.111.19 Lockingmechanism.The.manual traversingand elevatingsystshallact a8 travellocksfur the gun and turretwhen the vehicleis drivencross-countiyand all other locksare released. Turretard gun movementshallnot be tran=ittedto eitherof the had crankswith the lockreleased.3.5.11.1.20Controlhandlecentiringorce. Thecontrolhadle cent=iWforce,forboth gunner and commarder power controls, shallbe everywherepositwith hamiledisplacement. The lY@le torqueshallvarywith displacementfrom

5.0 ~ 3.0 Inch-pmurlsat 5 degreesdisplacementto not more than 11 inch-pounat 50 degreesof azimuthdisplacement. In elevation,the toque shallvaryfrcm 6.o ~ 4.0 inch-poundsat 5 degreesdisplacementto not more than 18 fnch-poundsat 20 degreesdisplacement.3.5.11.1.21Turrettraversefriction.With the turret assembly mountedto the hull and level within one degree, but With the traverse ~ar box outputplnton disengaged, the torque required to rotate the turret (after breakaway)shall not exceed300foot-pounds.urIng 360de~ees of turretrotation,thevariationof tique I n any 15 degrees of romtlon shall not exceed 50 foot-po3.5.U.1.22 Turretcreepami gun drift. With turret power on, aft.= w~-up pericd,the turretshallnot creepand the gun shallnot driftmore than1.0 ml).In a 5 minutepericd.


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MIL-A-62247(AT)3.5.11.1.23 Firingstability. Assumingno restdualhullmovementbetweensuccessivefiringsof conventionalcartridgesfrom the main armament,and withthe turretcontrolpower switchturned off or on, the systemshallhold thegun on targetwithb 1.0 mil in any direction. DuringmissileLaunch,lineof sightmotion,from all causesincludingvehiclemotion,shallnot exceed5 roilspeak angulardisplacementfrom zero. The amplitudeenvelopeshalldampto 3.6ti1s peak to peakwithin0.4 secondsafter firstmotionof the mfssile.Line of sightmotionduringmissileflight,resultingfrombreechoperation,shallnot exceed 1.0 mil peak to peak damued to 0.2 roilsIWak to mak within0.3 secondsof the msxim~ dlstur~ance,~ 0.25Sillfrom the originalreference.3.5.11.1.24 Stabilizedmode. Thebe capableof operatingin a stabilized

&d with a maxlm~ resid& offsetof

gun and turretcontrolsystemshallmcde.3.5.U.2 Gun fire controlsystem.3.5.11.2.1 Lineof sightaccuracy. The linesof sightof the telescopead periscopeshall Intersectwith the main weaponcenterlineat distancesof

14!00,e&rs and 600 metersrespectively,measuredfrom centerlineof trunnion.In gun positionsftcfzminus 7.5 degreesto plus 19 degrees,the linesof sightof the telescopea@ gunnersperiscopeshallmove in synchronizationith thecenterlineof the gun tubebore within plus or minus 0.2 mil and plus or minus0.5 roil,respectively,in elevationand azimuth.3.5.IL2.2 Gunnersperiscopebacklash. Backlashi n t h e gu n n er s p er Lscop e

s h a l l not exceed0.3 mil for any degreeof gun elevationthroughoutthe entireran= of elevationand depression.3.5.U.2.3 Boresightkmb travel. The boresightknob on the gunnersperiscopeand telescopeshallbe adjustableto a rein- of 3 roilsdown, 7 roilsup, 4 rollsright and 4 mi18 left,as measuredfrom the boreslghtposition.3.5.11.2.b ElevationquadrantM@UC. At zero gun elevationand withthebubble centered in the level vial, the knob scale ad the Index scale shallbe adjusted to read zero. At all angles of elevation ad depression~the readingon the elevationquadrantshallcorrespondto the positionof the gun within~plnsor minus 1.0 roil..3.5.LI.2.5 Sightingsystemforesightretention. Axtero miies or vehtc~eopemtlon over level,haml-mrrucea roaas,the Linesox slgntof the telescopead gunnersperiscope(inboth elevationad azimuth)shallmaintainpreviouslyestablishedboresl@t withinplus or minus 0.25uil and plus or minus 1.0 roil,respectively.3.5.IJ..2.6Azimuthinillcator.t any positionof the turretthroughout

360 degreesoftraversein eitherdirection,thebacklashof the azimuthindicatirshallnot exceedplus or minus 0.5 roil.

L6


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..

. .. .....

3.5.11.2.7 Laserrange finder (M551Alonly.wit% a ~er Range Finderwhich can be alignedInwithin ~2 usinp-thecupolaalignmentsystem(seecontrols.

MIL-A-62247(AT)The M551A1shallbe equippedsxtiuthwith the main gun3.10.3) and LaserRangeFinder

3.5.11.3Guidanceandcontrolsubsystem.All guidanceandcontrolgroupcomponentsshallbe electricallyground~ to the vehiclestructure. The groundcontactresistance@rollnot exceed10 milliohmsfor the trackerand signaldata converteror 80 milliohmsfor the other components. The backer rdl SXISshallbe alignedto convergewith the gun bore axisat 26.67roils(1.5 degrees)~ 3.0 roilsin elevationand at 0.0 mile ~ 3.0 roilsin traverse. The transmitterbesm shallbe parallelto the trackernull axiswithin~ 2.0 roilsin both azimutand elevation. Prescribedactivationof SystemTest switchshallresultinlightingthe %0 indication.

3.5.JA.4 Grenadeprojector system.3.5.11.k.1 Grenadeprojectorsystemfunctioning. The grenadepro~ectorfiringsystemshallbe capableof allowingfor grenadeprojectorfunctionduringa 4 secondmaximumtime intena.1aftermaster switchis actuated.3.5.U.4.2 Grenadeprodectorsystemcapability.The grenadeprojectorfiringsystenshallprovideforthecapabilityf salvo,rightbank, leftbank,and individualrenadeprojector(s)unctioning.3.6 Electranagneticompatibility.nlessotherwisepecified(see6.2),theentirevehicleshallhaveelectran~etlccompatibilityuppressionn accorwithtacticalvehiclerequirementslassllIAof hfILSTD461.3.7 Painting,markingand data plates.3.7.1 Painting. The exteriorand interiorof the vehicle,and its componeassemblies@ parts requirepainting,shallbe preparedand paintedIn accordan

with MIL-STD-193 Vehicle exterior, and interior portions, such as latchesand covers which are exposed W outside view, shall be painted drab olive colorchip X2k@? of Federal St d. No. 595. The interiorof thevehiclefightingom-partment,driverscom~tient, amiienginecompartmentshallbe paintedwhite,matchingcolorchip 27875of Federaltd.Nc.595.3.7.2 Marking. Vehiclemarkingshallbe i n accordance with drawings andMIL-STD-642.3.7.3 IWUM, shipping,and servicedata plates. All data platesshallbe in accordancewith drawi~ and MIL-P-514..

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M&A.622k7(AT)3.8 Hre extinguisilers.lh? ir18talledix&ifire extinguishersystemshali be operablefras insideati outsidethe vehicle. In smbient temperatureof ?2%, themaximumeffortrequiredto dischargethe system,either internallyor externally,shallriotexceed55 poumls. U&onactuationof the internalfireextinguisherhandle,the main fuel cupplyto the enginewill be shutoff.4. QUALITYASSURANCEPRCVIS1ONS4.1 Responsibility for Inspection. Unlessotherwisespecifiedin thecontractor purchase order,the supplieris responsiblefor the performanceof all inspectionrequirementsas specifiedherein. Exceptas otherwisespec-ified tn the contractor order,the suppliermay use his own or any other facili-ties suitablefor the performanceof the inspectionrequirementsspecifiedherein,unlessdisapprovedby the Government. The Governmentreserves the right toperformany of the inspectionsset forthIn the specificationwhere such inspec-tionsare deemednecessaryto assuresuppliesand servicesconformto prescribedrequirements.4.1.1 Contractors inspectionor qualitycontrolsystem. Unlessctherwise

specifiedby the pmeurlng activity,the contractorshallprovideand maintainan Inspectionati qualltycont rol syst em acceptable ta the Government coveringthe supplles under the contract. A current written description of the systemshall be submitted to the contracting cfftcer prior to initiationof overhaul.The contractorwill n d be restrictedto the inspectionstitionor to the methodof inspectionlistedprovidedthat an equivalentcontrolis includedin theapprovedqualitycontrolprocedure. The contractorshallnotifythe Governmentof a.mlobtainapprovslfor any chan&eto the writtenprocedurethatmight affectthe degreeof controlrequiredby this specificationor otherapplicabledocumentsreferencedt h e r e i n .4.1.2 Parts,components,and assemblies. Parts,componentsand assembliesshallbe inspectedIn accordancewith the drawingslistedon EPL 8736408andthe MasterList of SupplementaryQualityAssuranceProvisions8736b08.4.1.3 Government verification. All qualityassuranceoperationsperformedby the contractorwi11.be subjectto Governmentverificationat unscheduledintervals. Verificationwill-consistof (a) smeillmce oftheoperationsto determinethatpractices,methcxlsand proceduresof thewritten inspectionplan are being applied,and (b)Governmentproductinspectionto determinequalityof productbeing offeredfor accept ance. Deviation from the prescribed or agreed-upon procedures, or instancesof poor practiceswhichmight have an effectuponthe qualityof the prcduct,will Immediatelybe calledto the attentionof thecontractor. Failureof the contractorto promptlycorrectdeficienciesdiscoveredshallbe cause for suspensionof acceptanceuntil correctiveactionhasbeenmade or untilconformanceof!prcductto prescribedcriteriahas been demonstrated.4.1.4 Qualified products. The contractors Inspection records shallbecheckedto determineconformanceto 3.2.2.4.2 First overhauledvehicleInspection.


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MIL.A-62247 (AT)4.2.1 Specialprocessinspection A specialprocessinspectalonshallbe conductedby the Governmentduringoverhaulof the f irst vehicle(see 3.1)to evaluateconformanceof materialsand workmanshipwith technicaldata packa4.2.1.1 Hulland turretinspection.The hulland turretshallbe inspecprior to coveringthe wel.dnents~see 3.3.13)with paint or other pertinentcom

ponent or assemblies.4.2.2 Firstoverhauledvehicleinspection. Subsequentto the contractorinspectionof the firstcompletedvehicle, the Governmentshall inspectthisvehicleat the contractorsplant to determineconformanceto contractand spefIcatlonrequirements.4.2.2.1 Corrections. CorrectIonsfouminecessaryas a resultof the aboInspectIonshallbe made by the contractor.4.2.3 Initialoverhauledvehicletests. After completionof the firstoverhauledvehicleinspection,nother vehiclefrctnthe firstmonthsoverhaulor one of the firstten shallbe sUbjectedto examination(see4.4.1)ad testas specifiedin 4.5 (a)and (b). Subsequentto e,xm.lnationnd tests,the selvehicleshallbe subjectedto the 3,200m i l e t est specifiedin Table VI ardall.app~cable tests specifiedin Table VIII. These tests shallbe performedby the Government,at a siteapprovedby the Government,which will requirea maximwnof 90 days. Delayscausedby vehiclebreak-downdue to poorqualityof workmanshipor material,or failureof the contractorto furnishrepairparas requiredto adequatelysupportthe testor to complywith specificationsor drawingrequirementsshall not be the basis for sdjusimentof the contractperformancedatasor deliveryscheduleor contractprice.

Table VI. 3,200mile test (ccmbatloadedor a simulatedload)~GovernmentProvingGround)Course Mileageand speeds

Mard-surfaceroads 440 mi l es at vary i ng qxw ds up to maximumGraveland dirt roads 64o milesat varyingspeedsup b maximumLevelcross-country 940 milesat varyingspeedsup to maximumHIUy cross-country 960 miles at varyirgspeedsup b maximum4.2.3.1 Reliabilitytest. Reliabilityrequirementsof paragraph3.1.1will be verifiedat a @ conriaencelevelwhilevehicleis subJectedto Initirebuildtests. MeanMilesBetweenFailures(MMBF)shallnot be less than sepcfled.4.2.3.2 Durabilitytest. Durabilityrequirementsof paragraph3.1.lc(l)will be verifiedat a 5@ confidencelevelwhile vehicleis subJectedto initirebuildtests.4.2.3.3 Maintainability.The maintainabilityof the vehiclees qectfieIn paragraph3.1~ will be verifiedduring initialrebuildtesting.

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4.2.3.4 Test failure. Failureof the vehicleas the resultof any defic-iencyof a w or kmanshlpor materialsnatureduringor as a resultof the 3,200mile testmaybe causefor the Governmentto refuseto continueacceptanceofoverhauledvehiclesuntilevidencehas been providedby the contractorthatcorrectiveactionhas been takento eliminatethe deficiency. Any deficiencyof this nature founddur$ngor as a resultof 3,200mile test shallbe primafacieevidencethat all vehiclesalxesdyacceptedpriorto completionof the3,200mile test are @milarlydeftcientunless evidencesatisfactorytc thecontractingofficeris furnishedby the contractorthat they are not similarlydeficient. Such deficiencieson all vehiclesshallbe correctedby the contractorat no cost to the Covermnent.

4.3 Break-inrun. To determineconforma&e to 3.4.1,3.4.2,and 3.4.3,eachoverhauledvehicleshallbe lubricatedand servicedpriorto the break.in run. The run shallbe on smooth,level,hard-surfacedrosds, ad for thedistancespecified.n Table II. The vehicleshallbe operatedin reverseaftereach dlvislonas specifiedln 3.4.4. The undulating portionof the testshallbe accanplishedtwice in eachdirectionat speechbe~een O and 10 mphdurin~ division a sndbetieen 11 CUXI20 mph duringdivision%.4.3.1 Conditionafterrun. TO determineconformanceto 3.4.5,after com-pletionof the break-inrun, the vehicleshallbe checkedto determinethatthere Is no dsmageor malfunctionto the vehlc~ead thatadjustmentsare asrequiredh.4 Inspectionprovisions.4.4.1 Exsminatdons. V$sual,dfmensfonal,and primaryfunctionalexamlna.tion shallbe performedon eachvehiclefor conformanceto the tichnlcaldatapackageand this specification.Examinationsshallbe performedsgainsttheclassificationof defectsshownIn Table VII. Functionaldefectsfound In pro.Peru installedGovernmentfurnishedequi~ntwlllbe classifiedas specialand shallnot be used as a basis for rejectionof the vehicle. The folloving

constitutesa part of the classificationof defects(see6.4).(a] Anydripfrcxn the insidetithe outsideof a self-containedreservoirconstitutesa maJordefectwhen thevehiclehasbeen standingidleand the componentsare at ambienttem-perature.(b) Any seep that occu.mfrom the insideto the outstdeof astaticfit (mew to mew, or gasketcombination)shallconstitutea n@or defect.

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-.lableII. Claselflcatlonf defecteC1-.8racter@tlc

Engine

EnginegovernorsPwer train

*Fuel syri- componentsCooling8y8temcomponents(engineand tranamissfon)Exhaustsystemcanponents*@Electrical 8Y8* components(lnclwlesviring and instru-ments)Suspcnt3ion8ye.t4mcanpanenta3

Hull

Controlsand adjustingmech.

Ms$w: AQJ.25 Defects/lC6Unite Minor: AQL 150Defects/100Units101q

102,103.

104q105.106.107.

108.

109.110.

Doors,fetiers,grilles,panels,ill.ducts,stemge brackets,boxesjahoekeand steps*Fml leaksconstitutea opecial~~~ilment fail~es are not to be

Malfunction,leak&(see6.4c), mountingimproper,damageImpropersetting,malfunc.tionMalfunction,mountingim-proper,damage,leaks(see6,4 C)Malfunction,damage,leaks(see6.4 a)Malfunction,damage,leaks(see6.4 b)KXunage,eaksMQfunction,damage

Damage,tireor trackbase aemration, improperclearanceor alignmentweldingdefects,leaks(see6.4 c),malfunctionStructureand veldingde-fects(Metalshrinkorcratercracksexclwled)

201,

202*203.204q205.206.207.

208.

Malfunction,Impropercleer.209.anteMalfunction:toroionspring210.and hold-opendevices

Improper ccmponent assemblyor installationMissingor defectivesealsImpro*r componentassemblyor lnetallationImproperassembly,installa-tionor clearanceImproperssemblyr instal-lationImproperassembly,installa-tion or clearanceImproperassy.,installationcircuitfdentificationjclearanceor protection,illuminationof reticleImproperassy.,installationbolt or nut torqueand trackt.wwlon

ImproperlatlonImproperassembly

defectand will resultin tdal inqectdonclassifiedas a majoror minordetect.

assemblyor instal-fits,ad@Nznent,or installation

of the lotfor this

M~thc)dofImpectionvisualandfunctionalFunctionalVisualandfunctionalVisualandfunctionalVisual andfunctionalVisualVisualandfunctional

Vi8ual

Visuml

V!sualandfunctionalVisualand Pfunctional +

u


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Character ieticDrain valvesCushions,seats,rests andcrash Pa&lTurret traver8elockTravemMng and elevatingrnech.Recoil mechnisrn,replenisherm-d linw9&in amament

TableVII. Classificationof defects (Cantd)

Weaponcontrolsystem,(In.wlwies IWWle, aolenoide,%witehee,wiringandothercomponent)MieJc.item or acceewariesFire extinguisherystemeomponentePaint-protectivend anti-skidccatlrigsLubefittingsand lubricationDecals,markingO,data andinstructionlates

M@or: Au 25 Defects/looUnits i nor : AQL 150 Defects/100Units112.113.114.115.116.117118.

119.120.

ValveseatingimproperSeatcontrolmalfunctionLuckingmalfunction,amageClearanceimproper,compo-nentdamageCcmqxmentdamage,itiica-toraor linesdefectiveComp3nent&unage,improperaeeesablyr trunnioncapbolttorqueCanponentdamage,defectivewiringMalfunction,amage,missingSealsmissing or defective

!?11.212.213.214.215.

216.

217.218.219.220,221q

Improperaesy., installationof control adjustmentImproperfit, ln~t~llation,adhesionsor damageImproperassemblyor instal-lationImproperassemblyor instal-lationImproperassembly,Instdla.tion,fluidleveland typeimproper

Improperclearance,assy.,Installation,circuit identi-fication,protectionormarkingsImproperassemblyor in@al-lation

M~thodofInspectionVisualandfunctionalVieuelandfunctionalVisualandfunctionalVisualandfunctionalvisualandfunctionalVisualandi%ncti>nalVisualendI%ctionalVisualandfunctionalDatacard incomplete,mproperVisualassemblyor installationApplication,overageand visualmaterialsimproperFittingemissing,defective Visual

or improperlyinstalled,lubricationImpmperIncompletedata,missing, VieualImproperlocationor site,illegible


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MIL-A-62247(A4.4.1.1 unclasBifi@ddefects All caaponentdefectshavingno bearingon function,eafety, interchangeabilityr life,but which are considereddepturesfrom goodworkmanship,will be noted in writing. Workmanshipdeffcienfallingwithinthis catigoryaml recurringwill be added ti theminor classitionof defectsof thi8 Speclfication.4,5 Classificationof tests.

(a) Acceptancetests,4.5.1.1thrcmgh4.5.1.15.8.(b) (%ntroltests,U.5.$?through 4.5.2.11.(c) Canparisontests (CT),4.5.1.2through4.5.3.17.4.5.1 Tests.4.5.1.1 Acceptancetests To detemine conformanceto 3.5, afterbreakin run (see 3.b), eachvehicleshrillbe operatedfor a distanceof 8 mlIes ormore by the contractorand sub$ectedto teets specifled at the placeof con--tractirin hbIe VIII. Exceptfor equipnentati componentinstallationandservicingperformedby the contractoras a finalprocessingof vehiclesforacceptance,vehiclesshallbe caupletelyass=bled, all ad$@ments completeand servicedvith fuel, lubricationaxmlfluidas specified,but need not becombatloadedexceptfor holdingand floatationtests. After the testsjthevehicleshallbe examinedfor evidenceof fuel or lubricantleaks@?,or otherclefcienciea.4.5.1.1.1 Teat failure. If a vehiclefailsto passany acceptancetestSpecifiedherein,the Governmentshallwithholdacceptanceuntilevidencehas

been providedby the contmctir thatcorrectiveactionhas been taken.

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MIL-A-62247AT)TableVIII. Locationfor tests

Place GovernmentItem Title Paragraph of FYOvinghmber Contractor GroundAcceptancetestIatch seals checkControlscheckThrottlelinkagecheckDrivershatih checkLoadershatch cover checkEscapehatch checkBatteryaccessand air cleaneraccess..... door checkCcmmamier$shatch check,. Driversseat checkGunnervsseat checkCcmmamlersseat checkLoadersseat checkFuel llnee checkEkctrica.1By8t6SIlheckLi$hteIcheckBtlgepump motor checkPermnnel operationalheatercheckElectrfccontactring (hullto turret)checkElectriccontactring nofses checkGun firingcircuitscheckWeldingre~irs ad burningcheckPower train testsustainedEqJeedstestMaxtiumspeed test

AccelerationteststoppingtestHoldingtestTurn* testFkl 6ystemd engineoperationongrades& side slope testFloatattonaurfbd ard bmier system

4.5.1.14.5.1.24.5.1.3k.5.l.3.l4.5.1.4.14.5.1.4.24.5.1.4.34.5.1,4.44.5.1.4.54.5.1.5.14.5.1.5.24.5.1.5.34.5.1.5.44.5.1.64.5.1.74.5.1.7.14.5.1.7.24.5.1.7.34.5.1.7.44.5.1.7.54.5.1.7.64.5.1.84.5.1.94.5.L1O.14.5.1.10.24.5.1.10.34.5.L1O.44.5.1.10.54.5.1.1o.64.5.1.114.5.1.12

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MIL-A-62247(AT)TableVIII. Locationfor tests (Centd)

Place G.wernItem Title Paragraph of ProvNunber Contractor GrouCupolacheckTraversead gun firingmechanismtestControlpa=l tistPoueredtraversingaccelerationadspeedtestElectriccontactring (turretto cupola)test~wd traversecheckTumet and gun controltestXsnualtraveseefforttestManualelevatingefforttestManual traveraeratio testManu31elevatingrat%oteotSys- backlashd ccxnplianceestPouer and manualcontroltestOverridecontroltestControlaystamdeadspottestGun elevationapeaistestTurrettraversingspeedstestTraverse,elevationad depressionstepresponsetestElevattonsystemprotectiontest .I n ter fer en ce zon e testElevationand depressionrangeandMmit8 teatTargettrackingaccuracyand gun hyingon movingtargettestGun layingon etatlonary-get testTurretand gun controlsystem afioperationon slopestestControlhadl.ecentering force tes t

Line of sightaccuracytestGunnersperiscopebackla6htestBoreslghtknob travelteetElevationqusdrantlt13AlCtestSightingsystemboreelghtretentiontestAzimuthfxld$CELtOrerhGuidanceand controlsub-systemcheckoutGrenadepro~ector systemfunctionlngtest

4.5.1.13b.5.l.13.l4.5.1.13.24.5.1.13.3b.5.l.13.44.5.1.13.54.5.1.244.5.L14.14.5.1.14.24.5.1 .14.34.5.1.14.44.5.1.14.54.5.1:14.64.5.1.14.74.5.1.14.84.5.1.14.94.5.1.14.104.5.1.14.11L5.1.14.124.5.1.14.134.5.l.14.lh4.5.1.14.154.5.1.14.164.5.Llb.174.5.1.14.184.5.1.154.5.1.15.14.5.1.15.24.5.1.15.34.5.1.15.44.5.1.15.54.5.1.15.64.5.1.15.7

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MIL.A-62247(AT)Table VIII. Locationfor tests (Centd)

Place GovernmentItem Title ze;ph of ProvingContractor GroundGrenadep ro j e c t o r sy6temcapabilitytestcontroltestsContaminationtestVisiondevicestestFuel tanksand linesteotElectricalcontactring ad canmunIcatlonequipmenttestStowedequipnentte6tBilgepump operationalteatMinimumspeed testTurretcreep and gun drift testFireextl~isher teatCunparisontestSpecfd kits checkWinterizationkit testCollectiveprotectorkit testCarbonmoncuddeconcentrationtestFuel systemoperationaltestcoding systemtestEnvironmentaltestBi@e pumpwater removalteetTowed h@ S~ed te6tSlopeand grsdeoperationtestWater speedand directionalstabilitytestTrench crcmslngtestVerticalobstacletestLcckfngmechanismtestTurrettraversefrictiontest?IringstabilitytestS~llfzed mode testElectr_etSc cmn~tabl12ty tist

4.5.1.15.84.5.2h.5.2.34.5.2.44.5.2.54.5.2.64.5.2.?4.5.2.64.5.2.94.5.2.104.5.2.114.5.34.5.3.24.5.3.2.14.5.3.2.24.5.3.34.5.3.44.5.3.54.5.3.64.5.3.74.5.3.84.5.3.94.5.3.104.5.3.114.5.3..24.5.3.134.5.3.144.5.3.154.5.3.164.5.3.17

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4.5.1.2 Iatchseda check To determineconfomsnce to 3.3.1.1,the hatchesshallbe closedad kdcecland shallnot exhibitexcessiveleakagewhile a sprsyof free floulngmiter frana 1/2 to 3/4 inch insfded iameter hose i6 directedon the hatnhesfrana distanceof 3 feet for a periodof 3 mlnut.es.4.5.1.3 Control@check. To detemeineconformanceo 3.3.5,all controls

shallbe operatedand checkedfor functionalrequirementsand adjustments.

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MIL.AJ52247(AT)4.5.1.3.1 Throttlelinkage check. Todetermlne conformanceto 3.3.5.1,the throttlelinkageshallbe operatedas specifiedand theacceleratcn-edalcheckedfor contactwith the pedal stop.4.5.1.4 Hatchmechanismcheck.4.5.1.4.1 Drivershatchcheck. To determineconformanceto 3.3.6.1,force shallbe appliedto the unlockedhatchIockfngleverand the hatchcoverpushedto fullopenposition. Theforcerequfredshallbe as specified.4.5.1.4.2 Loadershatchcheck. To determine conformance to 3.3.6.2,force shallbe appliedto the edge of the hatchoppositethe hingesand theforcerequiredto open t h e hatch shallbe as specified.4.5.1.4.3Escapehatchcheck. Tn determineonformanceo 3.3.6.3,forceshallbe appliedto theendof the hatch lockingleverand the forcerequiredta unlatchthe escapehatchshallbe as specified.4.5.1.4.4 Batteryaccessand air cleaneraccessdoor check. lb detetineconformance to 3.3.6.4,forceehal1 be appliedto the appropriateliftinghdlead the forcerequiredto open a dcor shallbe as specified.4.5.1.4.5 Cammandershatchcheck. Tc determineccnfomance to 3.3.6.5,force shallbe appliedat the split lineof eech hatchcover and the forcerequito open a hatch coverfrcm an unlockedclosedpositionshallbe as specified.The hatch covershallbe checkedfor positioningaa specified.4.5.1.5 S~t checks.Q.5.l.5.l Driversseat check. Tc determineconformanceto 3.3.7.1,forceshallbe applied,tothe end of the appropriateleverof the seatati the forcerequiredto actuatepositioningfomard, backward,and verticallyshallbe asspecified. The seat pan shal l be I%nctlonallycheckedfor positioningas specl,

fled.4.5.1.5.2 Gunnersseatcheck. To determineconformanceto 3.3.7.2,orceshallbe appliedtQ the end of the fore and aft seat adjustmentpin ad theforce.requiredto pull the pin 8hallbe m specified. VerticalPositfonfngof the seat @hallbe acccxnplisheds specified.4.5.1.5.3 Ckrnmanderseatcheck. To determineconformanceto 3.3.7.3,force shallbe applied to the end of the seatadjustmentleverad the forcerequiredto disengagethe positioningpin shallbe as specified. Verttcslad,jusrnemtdistanceshallbe as speclfied.-4.5.1.5.4positioningand Loadersseatcheckretentionof the seatTo determineconformanceshallbe accanpMshed as

29

to 3.3.?.4,erticSpectfied.


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MIL-A-62247(AT)4.5.1.6 Fuel linescheck. To determineconformanceto 3.3.8.2,the fuelsystemshallbe alr pressurizedto 4.5 poumh pe r squareinch gauge (psfg)priorto engineinstallation,and checkedfor kaks at the fittings,valves,ati fueltank seals by app~ing 8~pyWatir or equivalent. Afterbreak-inrun, a visualcheck for leakageof the fuel sy8temshallbe made.4.5.1.7 Electrical system check. To determineconformanceto 3.3.10,3.3.10.1,and S.3.1O.2,the engineshalIbe startedam regulatedto a minimumengtiespeedof 750 rpn = mw On the ~e~~cle-~~~~lled *Ch~ter Utiervaryingengine speedsand with varyingelectricalloadsup to 300 amps, thevoltageshallbe checkedat the batteryterminals- shallbe as originallyregula~, ~ 0.5 volts.4.5.1.7.1 Lightcheck Todetensine conformanceto 3.3.10.3,all lightsshallbe checkedfor operationbefore,during,a?%lafterbreak-inrun.4.5.1.7.2 Bilgepumpmotorscheck. To determineconformanceto 3.3.1O.L,thebflge pump switchesshalIbe actuatedand the bilge pumpmotorscheckedfor operation.4.5.L7.3 Personnelheateroperationalcheck. To determineconformanceto 3.3.10.5and3.3.Xl.,personnel eater -Itch shallbe actuateda8 specifiedard the heatercheckedfor operationusing fuelas specified.4.5.L7.b Electriccontacting [hullto turret)check. To determineconformanceto 3.3.lo.b, the masterswitchand the gun ati turretcontrolselec-W switchsha.llbeactuatedto the 0~ positionas indfcatedby the indicatorlights,and the turretrotated360 degreesclockwiseand counterclockwise.The Ind$catorlightsshallnot flickeror go out at any point of rotation.0.5.1.7.5 Electriccontactring noise. Todetennine conformanceto 3.3.10.6.1and 3.5.10.2.1,an audiogeneratorshallbe connectedto the dr iver s intercomad a l,COOcyclesper second(cps)$ignalehdlbe introducedintothe c6mmunicaticnsystem. The turretati cupolashallbe manuallytraversed360 degreesand checked

f o r noise or e~tic tn the emone. The cmmunicat$on circuitsshallbe asspecified.4.5.1.7.6 Gun firingcircuitscheck. To determineconformanceo 3.3.10.?,connecta voltmetero theelectricaleadof thefiringsquibon thebreechmechaniumnd to grouzxl,ndwithpoweron,actuatethemaingunfiringswitchestn the circuiti?xl$vidually.Upon actuationof eithertrigger,continuityshallbe demonstrated.Connects voltmeterto the electricallead of the machinegun aolenold,and to ground,andvith poweron actuatethe firingswitch. Wonactuationof f i r ing witch, continuityof requiredvoltageshallbe dcmmnstrated.~.5.l.8 Weldingrepairsad burningcheck. To detensineconformanceb3.3.I.3,llweldingrepais andburningoperationshallbe checkedfor removal

of slagand in approvedprocedureshavebeen followed.

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MIL-A-622k7(AT

.. .

4.5.1.9 Pouer traintest. To determineconformanceb 3.5 and 3.5.2,the vehicleshallbe operated throughoutall gear arxlspeedrangesand the powtrainand associatedcontrolotestedfor operationas specffied.b.5.l.10 Speeds,acceleration,and brakingability.4.5.1.10.1 Sustainedspe~ tist. To determineccnformmce to 3.5.4.1,the vehicleshallbe operati without towed bad at a sustainedspeedas specifor not lessthan 10 minutesand at a minimumspeedas specifiedfor not lessthan5 minutes. Speedsshallbe asterWined for conformanceas evidencedbythe vehicleins~lled speedaneter.Vehicledrift shallbe checkedand shallbe aa specified.b.5.1.lo.2 M9XtiW f3pedtest. To determineconformanceto 3.5.4.2themsximvnspeedshal1 be timedatishallbe as specified.If a straightcoursetrackof sufficientlengthto achievemaximumspeed is unavailable,the follovalternatetest is allowable: Achieve19milesper hour in 3rd range fullthrottlewith the enginegovernoradJustedto provfdea no-loadspeedof 2940-2990qxll.b.5.l.10.3 Accelerationtest. To determineconformanceto 3.5.h.5, thevehicle nhall be accelerated fran a Stsrxlingstart to the requiredspeed innot more than the @peclfledime. It is allowableto use a measuredcoursedistancefor the time test. The equivalentdistanceto obtainthe O to 20 mphaped in 9 secondsis lb5 feet.4.5.1.10.4 Stoppingtest To detensineconformanceto 3.5.4.6,the vehishallbe operatedon a dry, level,hard-surracedroad free of loosematerisl,ar%ithe resultsof 3 consecutivestoppingtests shallbe averagedto make thisdetermination.Vehicledrift shallbe checkedduringthese testsand shallbe as epecifled.4.5.1.10.5 Moldingtest. To determineconformanceto 3.5.4.7,thevehicshallbe casbatloaded(OY a simulatidloadshallbe placedon t he ve~cle in

a position that will not restrictthe flovof engineair), and drivenupgradeafi dovn grade on the qxscifledgrade. In each instancethere shallbe no movement of the vehiclevhertbrakesare appliedunderconditionsas specified.This tistmay be conducted,n con@nction vith 4.5.1.11.4.5.I.10.6 Turningtest TO detezmineconformanceto 3.5.5the vehicleshall be operated clockwise and counterclockwisein 360degreeturnsby gearedsteerandby pivotsteer,and shallremainwithinthespecifiediametercirclb.5.1.11 Fu~~ systemati engineoperationon gradesam Glopes test.To determineconformanceto 3.3.8,3.4.2,and 3.5.5.1,the vehicleshallbepositionedupgradeand downgradeon a 60 percentlongitudinalgrade,and left

side up and rightsideup on a 40 percentslope,ami in each instance,the engishallbe operated,stoppedand restartedaa specified. Nmal oil pressure,

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MIL-M2247(AT)fuel supplyand temperatureshallbe mai.n~inedwhen operatingon specifiedgradesand slopes. The 60 percentlongitudinalbrake holdingtest may be con-ductedin conjunctionwith this test (see4.5.1.10.5).

4.5.1.12Flotation surfboardand barriersystemtest. To determinecon-formanceto 3.3.1,3.5.7.land3.5=7.11,at theconclusionf thebreak-inrun,thevehicle,with surfbomxland barrierequipnentin erectedposition,shallbe driven intowatir of sufficientdepth to floatthe vehicle. After15minutesof flotationwithbilgepump8off,the vehicleshallbe driven tolevelterrainandthewateraccumulationn the hullbottommeasured. Wateraccumulationshall not exceedthe depth specified.4.5.1.13 Cupolacheck. To determineconformanceto 3.5.10,the specifiedconditions shall be met prior to testing.4.5.1.13.1 Traverseand gun firingmechanismtest. To Cletemineconformanceto 3.5.10.1.1,the cupolashallbe traversedclockwisearmicounterclockwiseSIXI-e gun firingm~WISm teStSdat rand~ pOSiti0n6fOr 61mUltineOU6 capabili-tiesas specified.4.5.1.13.2 Controlpanel test. To detexmineconformanceb 3.5.10.2.1amlS.5.10.2.1,the ON OFF switchon the controlpanelshallbe deactivatedandthe cupolaelectricalcontro16checkedfor requirementsas specified.4.5.1.13.3 Remote witih test. To determineconformanceto 3.5.10.3.2.4.5.1.13.4 Powerd traversingaccelerationE@ speed test. b determineconformanceto 3.5.10.1.2,the cupola6hallbe acceleratedand timed from asta@ingstartto a rate of speedas specifiedorbothclockwisead counter-clockwisero~tion. After a uniformrate of motionis achieved,the cuplaspeedehallbe timed for rpn and shallbe as specffied.4.5.L13.~ Electriccontactr ing test (turretm cupla). To determineconformanceto 3.5.10.2.3or 3.5.10.3.3,electricalcircuitsehallbe checkedto assurecontinuitythroughoutthe circuitsa8 specified.4.5.1.13.6 lkinualtraversecheck. To determineconformanceto 3.5.10.2.4,3.5.10.3.5,and 3.5.10.2.6or 3.5.10.3.4, 3.5.10.3.5,w 3.5.10.3.6,the manualtraversehandleshallbe di6placedfran the s-age pmftion to the engagedpositionarxlthe cupolatraversedmanuallyin both directionswith the power.-. switchin.the onand again in the offposition. ResultantcePsbili~Yshallbe as specified.k.5.l.14 Turretand gun controltest. To determineconformanceto 3.5.11ad 3.5.U.1, tbe tumet Shallbe levelledto withinone degree. Wr acceptanceaml controlbsti of 3.5.11a turreta- may be utilisedw%th the exceptionof the fol.lhwingaragraphswh~ch requirea completivehicleteat: 3.5.11.1.1,

3.5.1~.~.=,3.5.~~.l.~,3.5.11.1.14,.5.U.1.19,3.5.11.1.21,.5.11.1.23,3.5+~~.l.24,.5.11.2.5.The speedraterequirementf 3.5.11.1.10may be con-ductadon the turretstamlwhile the maximumspeedrequirementshallbe conductedm the completevehicle.32


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M IL A+2247(AT]Q.5.1.14.2 Mmual traverseefforttest. To determineconformance to3.5.11.1.1,the hand crank sb~l,lbe rctatedand the force to maintain turretmcvementmeasured. The force shall be measured In each direction of rotationat four points approximately90 degreesapart,throughout360 degyeesof traverseati shallnot exceedapecifled effort.4.5.1.14.2 Man~l elevatingefforttest. To determineconformanceto3.5.11.1.2,the hand crank dial.be rota=-ti maintainmcvementof the ~nin elevationand depressionand, throughoutthefull r~ngeof elevation,theforcereqtiredehallbe as specified.4.5.1.14.3 Manualtraverseratio test. To determineconformanceto 3.5.11.after exclusionof backlash,the Imnd crankshallbe r o t a t e d clockwiseand theturretmcvementshallbe as specified. The tectwill be repeatedin the counter-clockwisedirection.4.5.1.14. Kanualelevatlonratio test. To determineconformanceto3.5.11.1.4,afterexclusionof backlash,the harxlcrank shallbe rotatedin

eleV~t$On and the gun anguhr movementshall be as Specified. The test shallbe repeatedin depression.

b 5.1.lh.5 System backlash ad compliance test. To determine conformanceto 3.5.11.1.5the syetemshallbe testedforbacklashin elevationand traverseby applyingforceas specifiedat the muzzleend of the gun. Backlashin eleva-tionand traverseshallbe aa specified.

4.5.1.14.6 Powerand manualcontroltest. To determineconformance to3.5 J.I..I..6the fire controlselectorswitchand firfngtriggersshallbe activateas specifiedand observedfor properfunctioning.

4.5.1.14.7 Overridecontroltest. To determineconformanceto 3.5.11.1.7,the overridecontrolswitihshallbe operatedas specif~edand the controlandmvement of tie gun observed. The commandersover ride switchshallnot bereactivatedat intervalsof le43sthan 10 seconds.

4.5.l.lh.8 Controlsystemdesdspottest. Ts determineconfomnanceti3.5.11.1.8,the gunners@ canmanderscontrolhamllesshallbe operatedas8pecifled, and the degreeof deflectionnecessary to initiateturrettraverse,gun elevatfon,and gundepresslonshallbe measured. Whenmeasuringthe deadspotangle, initialfree hamilemovementshallbe determinedas specified,in orderto establ$ohneutralcenterpositionof the inotalledhandles.4.5.1.14.9Gunelevationpeedtest. To determineconformanceto3.5.11.1.9,the gun shallbe elevatedanifdepressedat specifiedspeedein themon-atabllizedmode by uee of the gunner~sand commanders~wer controls,andthe gun checked

tion speedsadfor speedad con~ol. Handledisplacementshallproduceeleva-controlas specified.

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.

MIL-A-62247(AT )4.5.1.14.10 Turrettraversingspeed test. To determineconformanceto3.5.11.1.10,the turretshallbe traveraedclockwiseand counterclockwiseYuse of the -rs and ccammxiers~er controlsin the non-stabiMzedm&le,arxltie speedra=s producedby requiredhandledisplacementshallbe checked@ ohallbe as specified. After allowingthe turretto accelerateapproximately1/4 revolution,maxlnnzntraversespeedshallbe timed,and the firstrevolutionof the turretafter this accelerationehallbe accanpliahedat the speclffedrate.4.5.1.14.11 lYaverse,elevationand depressionstep responsetest. Todetemine conformancc to 3.5.11.1.11, with the turretcontrolpower swXtch turnedon, the gun and turretrateresponseeto stip inputsshallbe as specified.4.5.1.14.12 ELevationsystemprotectiontest. To determineconfomanceti 3.5.lJ.l.12,the gun shallbe operatedat full qeed againstboth the eleva--. tion and depressionstopswith both powerand manual controlsand checkedforfunctionalr~ulrements as specified.4.5.1.14.13 Interferencezone test. To determineconformanceto 3.5.11.1.13,

the turretshallbe rota= by power at maximumtraverseratewith gun fullydepremed and observedfor clearancerequirements.The test shallbe conductedin stabilizedaxxinon-etablllzedmodes.4.5.1.14.14 Elevationad depressionrange ad limitstest. To detexmineconformanceto 3.5.11.1.14 the m s~~ 1 be elevatedby power and manualcontrolami checkedfor functionalequirementsas specified. Vehicle attitudeshallbe conalderedin measurements.4.5.1.14.15 Gun layingon moving targetati trackingaccuracytest. T>determineconformanceto 3.5.Il.1.15 ami 3.5.11.1.16 or acceptancetestingtraverseratesof 0.5 ti-70.1 mile-per 13&ondas shown in !hble IV shallbeused. A suitableturret trackingin6trunentshallbe usal as an equivalentmeans of making this test. All rangesand targetinformationin Tables 11I

ard IV will be us@ when perfoming lCTs at the GovernmentProvingGrounds.4.5.1.14.16 Gun laying on stationary target test. T~ detexmine conformanceto 3.5.111.17fm aceeptane teatinglthegunsightretfcleshalle broughtwithintheborderof thespecifiedargetforposition3 within the specifiednumberof trialsfran fourdifferentdirections,for both power and manualcon-trdst and frcm two directionsfor positions5 and ?. All positions will beused when performingICTsat the GovernmentProvingGrotis.4.5.1.14.17 Turretarxigun controlsystem, operationon slow test.To determineconformanceto 3.5.11.1.b for acceptancetesting,the turretshallbe placedon a 10 degree@lopeafi the gunsightreticleshallbe brought* thebordersof the tirgetspecifiedfor positions3, 5 and 7 of Table V

cletermlnationhallbe made for each of the 3 positions,using powerand

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M L-M 2247(AT)controle,and shallbe as speciff.ed.The turretand gun controlsystemshallbe checkedfor functionin elevationand depressionand cIockwlse and counterclocwise rotationwhen pitchedor cantedon a 15degreeslope,andthenreturnedti levelterrainandagainfunctionallyheckedfor con for m an ce a s specified.

k.5.l.lk.18 Controlhafilecenteringforcetest. To determineconformanceto 3.5.11.1.20,the displacementorque for the gunner and commander power con-trolharxllesshallbe measuredfor gun elevationafi depression and for clockwiseand counterclockwiseturretrotation,and shallbe as specified.

4.5.1.15 Lineof sightaccuracytest. Tn determineconformanceto 3.5.11.2the accuracyof the lines ofsight of the gunnerstelescopeconventionalreticleand the gunners periscopereticlewith the mainweaponcenterlineshallbedeterminedby elevations frcm maxlmus depression. Superimposethe boresco~reticlecen te r on eachof the mainweaponcenterlinepositions( 7.5, 0, 10,15,lY)) withoutovertravelaylngfrcanow to high. At each elevationposi.tion the gunnerstelescopeconventionalreticlecenterlineand gunnersperi-scopereticlecenterline shallfallwithin theirrespectivespecifiedtolerances.4.5.1.15.1 Gunnersperiscopebacklashtest. Todetermineconfo~ceto 3.5.11.2.2,backlashshallbe checkedafter synchronizationrequirements

have been met. Tests shall be made in accordancewith the followingprocedure:(a)

(b)

(c)

(d)

(e)(f)

Gun shallbe placeddeadon aimingpointof targetbylayingfrcm low to high. This shallbe accomplishedwith. .out overtrevel.The gunnersperiscopereticleshallbe placeddeadontargetrelatlveto the gun. Boresightknobsshallbelockedin thispositionand micrometerscalesslippedtonormal settings4.The gun shallbe realignediththemunetargetaimtngpoint as In (a)by layingfrunhigh to lowwithoutover.travel.If necessary,the gunnersperiscopereticle(excludingboresightknobbacklash)shallbe realigneddeadonaimingpointby use of elevationboresightknobs. Eleva-tionboresightknob micrometer scale shall be used.The differencenreadingbetween(h)and (d),above,ehallnotexceedthetolerancepecified.Backlashshallbe checked,t gun posftlonsof zero,5,10 and 15 elevatl,ons.

4.5.1.15.2 Boreeightknob traveltest. T.tdetennineconformanceto 3.5.11.2afterconfirmingthat synchronizationequirementshavebeenmet, boresightknob travelshallbe testedfrun the positionsestablishedin ~.5.l.15.l.

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MIL-A-62247(AT)4.5.1.15.3 ElevationquadrantMk3AiCtest. To determineconfomnanceto3.5.11.2.4,the gun shallbe positionedto zeroelevationby layinggun fromlow to high. The bubble in the levelvialof elevationqusdrantML3A1Cshallbe centeredand the knoband indexscalesadJustedto read zero. The gun shallbe elevated(withoutovertravel)to 19 degrees (337.78mila) on the target,ati the readingon the elevationquadrantMljAICshallbe as specified. This

procedureshallbe applled I n r ever se for depressionat a depressionof 7.5degrees (133.33mib).4.5.1.15.4Sightingsystemforesightetentioner$t.To determineconfor-mance to 3.5.11.2.5,prior to t3mile road test, the weaponshallbe foresighted@ the ~ers periscopeand telescopelineeof sight synchronizedon theirrespectivealmlngpoints. After completionof the 8 mile roadtest, the vehicleshallbe returnedto the place franwhich the originalsettingswere made amithe weaponforesightedaa beforethe test. The ~ers pe r i s cope and telescopesligment shallbe checkedand shallbe withintheirrespectivetolerancesasspecified.NCWE: If weatherconditionsare suitable,it i6 permlasibleto use distantaim~~inti. The periscopeaimingpoint shall thenbe located at a distance

of 600 meters~ 50 metersand the telescopeeimingpoint locatedat a mlnlmumdfstanceof 1200metersfrczstheweapontrunningaxis.4.5.1.15.5 Aztiuthindicatartest. To detemine conformanceto 3.5.11.2.6,the verticallineof the gunnere telescopereticle@hallbe laidon a fixed,well def$neclverticalalmlngpo~nt. The zeroof the gunnersaid (outermovabledial) on the azimuthindicatorshallbe poaltionedin linewith the one mllpointer. The turretshallbe rotatedapproximately50 mile clockvise,and thencounterclockwiseto the originalalmlngpointwithoutovertravel. The backlasherror, which is the differencebetweenthe originalpositionad the finalreading,shall not exceed0.5 mfl. Repeatthis procedureby movingcounterclockwlaemd returningclockwise.& .5 .i . i 5 . b La ser r a n ge ffnder. To determinethat the LaserRange Findercan be repeatedlyalignedin azimuthvlth the m ain gun as outlinedin 3.5.11.2.7.Q.5.L J.5.7 Missile@dance and ccntrolsyetemcheckout. %b determineconfonnanceto 3. themissileguidance and controlsystemcheckoutproce-dure shallbe aa specifled tn SMILI.ELAGH4ZesileystemTechnicalProcedure6&9 and TM 9-2350-230-12,Table 2-9 and Pragraph 10-5b.4.5.1.15.8 GrenadeproJector8Y8tem fblCtiOm@3 test. To determinecon.fonuance* 3.5.XL4 .1 a minimunvoltageinputto the systm shallbe 18 voltsDC. Upon actuationof the 8y6temmasterswitchon the grenadeprojectorcontrolpanel,the time i n t er va l f o r t h e r ea d y llght to be lightedshallbe aa epeclfled.4.5.1.15.9 Gren@e FJ ectareyatemcapabilityteat. To determineconfor-mance to 3.5.11.k.2 the grenadeprojectirfiringsyatm shallbe operatedamicheckedfor fum tlonalrequirements.

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.. . . .

MIL-A-62247(AT)4.5.2 Controltests. Teets formaintainingcontrol of those requiremenwhoseinspectionouldbe of t oo longdurationto be includedunder acceptancetests shallbe conductedby the contractoras specifiedherein.4.5.2.1 Frequency. The fIratoverhauledvehicleoff the productionline,or one of the firstten vehiclesproduced;and thereafter,one vehicleper mont

shallbe subJectedto the followlngcontroltests.4.5.2.2 Te8t failure. If a vehiclefailsto pessany ccntroltestspeci.fied herein,theC%xmvxnentmay stip acceptanceuntilevidencehasbeen provideby the contractorthat correctiveactionhas been taken.4.5.2.3 Contaminationtest. To deterznineonformanceto 3.3.1,the vehicafter no storethanone hourof water operation,shall be examined for contam$ma-tionof lubricantsof roadwheels2, 3, &, 5 anilom? of thefrcorresporxlingrmson each side of tke vehicle. Contaminationshallnot exceed2 percent(byvol-ume). ThfG testmaybe conductedin [email protected] 4.5.1.12. Exsmlnationshallbe corxluctedor evidenceof unacceptablelnlx?rnaleakagefrombearings.4.5.2.4 ViaIondevice teet. To determineconformanceto 3.3.3,the visio

devicesshallbe installedi he mountsand check- for blrdirq,interferenceand leaks. A spray of waternfroma 1/2 to 3/4 Inch insidediameterhose shallbe d%m?cd on the viaicndevicesfrcm a die-e of 3 feetfora periodof3 minuteswithout excessive leakage. This test may be conductedfn conjunctionwith 4.5.3..?.40~.2,5 ~u~l ~0 ~ lines test To detemntneconformance to 3.3.6.1.ad 3.3.13.2,ith both fuel fillercaps removed,the fueltanlw shallbe filledat the speciffed aver~e f%11rate. The tanks ad lines ehallbe checkedforleaksbeforeand afterthe read test.4.5.2.6 Elec~ical.contictr i ng and communicationeq,ulpnentest. Todetermineconformanceto 3.3.M. b, and 3.5.10.2,the electricalcontactringad communicationequipnentleed~and cableassembliesshallbe checkedforinstallationand functlonalrequirements.4.5.2.7 st ow ed equ.lpenttest. To determineconformanceb 3.3.12.,llmanufacturerand depotinstailedOVE shallbe stowed(ccmbatloaded)on theselectedvehicle. The equ$pnentshallbe removed after the.test. The OVE used,as providedto the contractor,will representthe latestproductionavailableto the contractor.4.5.2.0 Bi l ge pump operational.est. To determineconfonnanceto 3.5.3,the bilge pumpeshallbe operatedand checkedfor functionalrequirements.4.5.2.9 Minlmunepeedtest. To determineconformanceto 3.5.b.3,thevehicleshallbe operatd at specifiedspeedand lengthof timearrichecked

for performancerequirements.37


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MIL.A.62247(AT)4.5.2.10 Turret creep and gundrtft test. To determineconfo-nce tO3.5.11.1.22the turretpower 6h811 be turnedon and the systemallowedto warmup. After millingout the system,the tumet and gun posttionsshallbe noted;and, after a waitingpericdof 5 udnuteswith power on and palm switchdepressed,turretand gun positionsshallagainbe checked. Gun ati turretcreep and dxiftshallnot exceed the tolerancesEpecified.4.5.2.Xl Fire extinguishertest. To determineconformanceto 3.8, thefire extinguishersystemshallbe functionallytestidby use of insideand outsidecontrols. Subsequentmonthlytest# shallbe made by testingalternatingsideseach month (insidecontrolone month,outsidecontrolsthe next month,etc.).4.5.3 comparisontest. The Governmentmay selectvehicle(s)at any timeduringa productioncontractperiodand subjectsuch vehlcle(s)to all testsuatd in tableVIII (4.5.1.2tkou@ 4.5.3.17)afi ~ble 1X ~ de~~ine ifany deflciencieeof a workmanshipor materialsnatureexist. These tests shallbe conductedat Governmentlaboratoriesor provinggroundsdesignatedby thecon~cting officer. Canparisonteatvehiclesehallbe combat loadedwith allon-vehiclematerialstowedin the spacesprovided(see3.3.12). Vehicle(s)

selectedshallnot inchie any vehiclesPrevioudy testedfor conformancetob.5.2(controlests).4.5.3.1 Te6t failure. Failureof any vehicletestedto complywith anyof the requiranentsspec

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