plano hyd 994f.pdf

8/12/2019 PLANO HYD 994F.pdf

1/23

INTERACTIVE SCHEMATIC

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Cover Page

Information

Schematic

Machine Views

Component Table

Tap Table

Fluid Power Symbols

Electrical Symbols

Front Frame

Rear Frame

Tap Views

Features

Options

Bookmarks X

EC-C3

EC-C2 E-C60

EC-C1

E-C61

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2/23

Hydraulic System

994F Wheel Loader

RENR6320-00July 2005

442 1-UP


3/23

Volume 1 of 2 - STEERING AND

BRAKE SYSTEM, Page 1 of 2

COMPONENT LOCATION

Item

NumberDescription

N

Part

umber

Schematic

Location

1 Tank Group - Steer/Brake 248-2583 A-3

2 Pump Group - Steering 263-5065 B-7

3 Valve Group 6E-1024 C-7, C-5

4 Pump Group - Steering 6E-0868 E-5

5 Plug - Orifice 6L-9716 D-8

6 Valve Group - Relief 6E-0859 E-8

7 Valve Group - Neutralizer (Left and Right) 9T-7426 C-8

8 Valve Group 149-4617 D-8

9 Cylinder Group - Right 9T-9019 F-8

10 Valve Group - Reducing 1U-2226 A-8, A-7

11 Switch Assembly 224-8497 B-7

13 Pump Group - Cooler/Filter 6E-0867 B-3

14 Filter Group 6E-0874 C-3

15 Valve Group - Cooler Bypass 264-6867 D-3

16 Core Group Oil Cooler 186 0059 D 3


4/23


BRAKE SYSTEM, Page 2 of 2

COMPONENT LOCATION

Item

NumberDescription

N

Part

umber

Schematic

Location

31 Valve Group 249-5615 B-8

32 Screen Assembly 9T-9227 A-4

33 Screen Assembly 7J-2656 A-4

34 Connector - Orifice 143-4218 A-7

35 Filter 9T-1119 B-3, A-2

36 Pump Group - Brake Cooling 116-7341 A-2

37 Valve Group - Check 104-7108 C-2

38 Accumulator Group - Brake 219-4707 C-2

39 Core Group - Oil Cooler 9Y-8890 B-2

40 Valve Group - Check 122-3359 B-2

41 Valve Group - Check 9T-3752 B-2, C-1, C-2, B-1

42 Screen Group 164-3306 B-2, B-1, C-2, C-1

43 Brakes C-2, C-1

44 Pump Group - Brake 102-4226 B-3

45 Valve Group Check 9T 6005 C 3

N/A


5/23

Volume 2 of 2 - IMPLEMENT SYSTEM,

Page 1 of 2

COMPONENT LOCATION

Item

Numb

erDescription

Part

Number

Schematic

Location

1 Pump Group - Tandem 245-8893 C-6

2 Pump Group - Implement 124-3761 B-6, C-6

3 Tank - Expansion 227-5147 A-44 Valve 102-4156 B-4, C-4, D-5, C-5

5 Valve Group - Relief 143-8912 B-4, C-4, D-5, C-5

6 Screen Group 251-2451 B-5, C-5, D-5

7 Filter Group 115-2129 B-6, C-6, D-6, C-7

8 Switch Assembly 117-7773 B-7, C-7, D-7, C-89 Valve Group - Control 241-4821 D-2

10 Valve Group - Relief 142-4281 C-2

11 Valve Group - Relief 9T-9197 C-2

12 Valve Group - Relief 248-0020 C-2

13 Valve - Check 6E-1291 B-2

14 Valve Group - Control 241-4822 C-3

16 Valve - Check 119-0913 B-3


6/23

Volume 2 of 2 - IMPLEMENT SYSTEM,

Page 2 of 2

COMPONENT LOCATION

Item

Numb

erDescription

Part

Number

Schematic

Location

25 Valve Group - Pilot 177-4104 F-7

26 Valve Group - Selector 140-8243 E-4, E-5

27 Connector - Orifice 4I-6206 E-4, E-528 Valve Group - Relief 245-4891 B-7

29 Filter Group 6E-0874 B-8

30 Cooler 186-0058 B-8

31 Valve Group - Check 264-6867 B-8

32 Tank Group 248-2585 A-733 Screen Assembly 9T-9227 A-5, A-6, A-7

34 Screen Group 7J-2656 A-6

35 Gage - Liquid Level 147-9580 A-5

36 Valve Group - Breaker and Relief 133-1963 A-2

37 Valve Group - Breaker and Relief 220-0812 A-3

38 Tank - Expansion 251-1073 A-3

40 Sensor Group - Pressure 3E-6934 B-1


7/23


BRAKE SYSTEM

TAP LOCATION

Tap

Number Description

Schematic

Location

AA STEERING CYLINDER PRESSURE (LEFT) E-8

BB STEERING CYLINDER PRESSURE (RIGHT) E-8

CC LEFT STEERING PUMP PRESSURE C-7

DD RIGHT STEERING PUMP PRESSURE D-5

EE STEERING COOLING PUMP PRESSURE C-3

FF REAR BRAKE ACCUMULATOR PRESSURE E-1

GG FRONT BRAKE ACCUMULATOR PRESSURE E-1

HH BRAKE COOLING PUMP PRESSURE B-2

JJ FRONT BRAKE PRESSURE D-2

KK REAR BRAKE PRESSURE D-2

LL OIL SAMPLE PORT (SOS) C-3


8/23

Volume 2 of 2 - IMPLEMENT SYSTEM

TAP LOCATION

Tap

NumberDescription

Schematic

Location

AA Implement Oil Cooling Pump Pressure C-8

BB Implement Pilot Pump Pressure E-8

CC Left Fixed Displacement Pump Pressure D-5

DD Right Fixed Displacement PumpPressure B-4

EE Center Variable Displacement PumpPressure C-4

FF Center Fixed Displacement PumpPressure D-5

GG Tilt Rod End Pressure D-1

HH Tilt Head End Pressure D-1

JJ Lift Head End Pressure B-2

KK Lift Rod End Pressure B-1


9/23

FLUID POWER SYMBOLS

ONE POSITION TWO POSITION THREE POSITION

VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

TWO-WAY THREE-WAY FOUR-WAY

SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION

(FIXED)

2-SECTION PUMP

MAIN AUX.

SPRING

(ADJUSTABLE)

VARIABILITY LINE RESTRICTION

(VARIABLE)

LINE RESTRICTIONVARIABLE and PRESSURE

COMPENSATED

PRESSURE

COMPENSATION

PUMP: VARIABLE and

PRESSURE COMPENSATED

ENERGY TRIANGLES

HYDRAULIC PNEUMATIC

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

FLUID STORAGE RESERVOIRS

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONERPUMP or MOTOR

VALVES

SOLENOIDMANUAL

SOLENOIDd PILOT

SOLENOID andPILOT MANUAL

COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

BASIC

SYMBOL

SPRING

LOADED

CHECK VALVES

NORMAL POSITION

A B

P T

A B

P T

SHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

SHUTTLE PILOT

CONTROLLED


10/23

ELECTRICAL SYMBOLS

Hydraulic Symbols (Electrical)

Wire Number Identification Codes

Electrical Schematic Example Hydraulic Schematic Example

Transducer

(Fluid)

Transducer

(Gas / Air)

G

Generator

Electrical WirePressure Switch

MElectric Motor

Pressure Switch

(Adjustable)

Temperature Switch

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

T


11/23

DRAIN/RETURNLINE

LINESGROUPCOLORDESCRIPTIONS

BRAKECIRCUIT

STEERING CIRCUIT

STICSTEER CIRCUIT

BRAKECOOLING CIRCUIT

SUPPLYLINE

SECONDARY STEERING CIRCUIT

PARKING BRAKECIRCUIT

STEERING CYLINDERS

THIS SCHEMATIC IS FOR THE 994F WHEELLOADER STEERING AND BRAKE SYSTEM

Part #: 246-8025 CHG 03 and 248-2712 CHG 01

Components areshowninstalledona fully operablemachinewiththekey and engineoff andtransmissionshifterin neutral.

LINE PATTERNS

Drain/ ReturnLines

Component Group

Pilot / LoadSensingPressure

PressureLine

Attachment

AirLine

CALLOUTS

Taps (Pressure, Sampling,Sensor)by letter

Componentsby number

YY

52

STEERING

CYLINDERS

LEFTRIGHT

STICSTEER

PS

HS

PS

HS

BRAKERETURN

FRONT BRAKESUPPLY

REAR BRAKESUPPLY

PARKING BRAKETRANSMISSION

INTERLOCKOVERRIDESW

STOPLAMP SW

IMPELLER CLUTCH PEDAL

POSITIONSIGNAL

(TO TRANSMISSIONCONTROL)

BRAKE SYSTEM SCHEMATIC

BBAA

DD

LL

EE

HH

JJ

CC

GG

KK

(19) CYLINDER GP

LEFT6E-0529

345678

A

C

D

2345678

A

B

C

D

E

F

B

12345678

A

C

D

E

F

12345678

A

B

C

D

E

F

B

(6) VALVE GP

RELIEF6E-0859

(28) VALVE GPSHUTTLE

4T-1860

(26) VALVE GPSTEERING154-5236

(8) VALVE GP149-4617

(5) PLUG - ORIFICE149-4617

(7) VALVE GP

NEUTRALIZER

(LEFT AND RIGHT)9T-7426

(31) VALVE GP249-5615

(10) VALVE GP

REDUCING1U-2226

(10) VALVE GP

REDUCING1U-2226(21) FITTING

ORIFICE110-0778

(34) CONNECTOR

ORIFICE143-4218

(11) SWITCHAS224-8497

(2) PUMP GPSTEERING

263-5065

(3) VALVE GP6E-1024

(23) SCREENGP

251-2451

(27) VALVE9J-8225

(22) CONN

ORIFICE8C-0564

(9) CYLINDER GPRIGHT9T-9019

(30) VALVE GP

RELIEF9J-0460

(23) SCREENGP251-2451

(20) VALVE GP

CHECK

6E-1252

(20) VALVE GP

CHECK6E-1252

(25) FILTER GP

115-2129

(24) SWITCH AS

117-7773

(48) SENSOR GP

TEMPERATURE118-7226

(17) PUMP GPSTEERING

6E-1252

(3) VALVE GP6E-1024

(4) PUMP GP

STEERING

6E-0868

(29) VALVE GPDIVERTER163-5465

(53) FOOT BRAKE

CONTROL250-9458

(32) SCREENAS

9T-9227

(33) SCREENAS7J-2656

(1) TANK GPSTEER/BRAKE

248-2583

(47) SWITCH ASLIQUID LEVEL

172-8660

(35) FILTER

9T-1119

(13) PUMP GPCOOLER/FILTER

6E-0867

(44) PUMP GPBRAKE

102-4226

(14) FILTER GP6E-0874

(45) VALVE GPCHECK

9T-6005

(16) CORE GPOILCOOLER

186-0059

(15) VALVE GPCOOLER BYPASS

264-6867

(49) SWITCH AS144-5661

(52) VALVETANDEM BRAKE

247-1259

(56) PARKING BRAKE116-1339

(50) SWITCH- LIMIT171-7805

(51) SWITCH PRESSURE175-3244

(41) VALVE GPCHECK9T-3752

(42) SCREEN GP164-3306

(43) BRAKES

N/A

(43) BRAKESN/A

(42) SCREEN GP

164-3306

(41) VALVE GPCHECK9T-3752

(39) CORE GPOILCOOLER

9Y-8890

(40) VALVE GPCHECK

122-3359

(35) FILTER9T-1119

(46) TANK GPBRAKE COOLING

122-3359

(47) SWITCH ASLIQUID LEVEL

172-8660

(48) SENSOR GPTEMPERATURE

118-7226

(36) PUMP GPBRAKE COOLING

116-7341

FF

(55) SWITCHPARK BRAKE INDICATOR PRESSURE

174-4312

(54) VALVE

PARK BRAKE CONTROL

106-1774

(57) VALVE

BACK PRESSURECHECK VALVE

243-2652

(37) VALVE GP

CHECK104-7108

(38) ACCUM GPBRAKE

219-4707


12/23

12345678

C

D

E

F

2345678

A

B

C

D

E

F

B

A

1

DRAIN/RETURNLINE

LINESGROUPCOLOR DESCRIPTIONS

IMPLEMENT PUMP CIRCUIT (LEFT)

PILOT PUMP OUTPUT

OILCOOLING CIRCUIT

IMPLEMENT PUMP CIRCUIT (CENTER REAR)

SUPPLYLINE

IMPLEMENT PUMP CIRCUIT (RIGHT)

IMPLEMENT PUMP CIRCUIT (CENTER FRONT)

CENTERFRONT

LEFT

RIGHT

CENTERREAR

LEVER LOCKS

LIFTTILT

PS

HS

RAISELOWER

RACKBACKDUMP

ADDITIONAL

RAISE LOWER

R AC KB AC K D UMP

LOWER

RAISE

DUMP

RACKBACK

AA

THIS SCHEMATIC IS FOR THE 994F WHEELLOADER: IMPLEMENT SYSTEM

PART #: 246-8028 CHG 03 (VOLUME 2 of 2)

Components areshowninstalledona fully operablemachinewiththekey andengine

off andtransmissionshifterinneutral.

LINE PATTERNS

Drain/ ReturnLines

Component Group

Pilot / LoadSensingPressure

PressureLine

Attachment

AirLine

CALLOUTS

Taps (Pressure, Sampling,Sensor)by letter

Componentsby number

YY

52

BB

CC

FF

EE

DD

JJ

LEFT

RIGHT

CENTERREAR

CENTERFRONT

GG

KK

HH

RIGHT SIDE LEFT SIDE

(23) VALVE GP

CHECK9T-3096

(22) VALVE GP

CHECK6E-5444

(21) VALVE GP

RELIEF245-4788

(8) SWITCH AS117-7773

(20) PUMP GP245-0963

(29) FILTER GP

6E-0874

(51) SWITCH AS144-5661

(30) COOLER186-0058

(42) SENSOR GP

TEMPERATURE118-7226

(32) TANK GP248-2585

(33) SCREEN AS9T-9227

(8) SWITCH AS117-7773

(8) SWITCH AS117-7773

(7) FILTER GP115-2129

(24) VALVE GP

SELECTOR119-5988

(47) CONNECTOR260-9227

(25) VALVE GP

PILOT177-4104

(46) VALVE GPSOLENOID152-8385

(45) VALVE GP

SOLENOID147-1223

(44) VALVE GP

SEQUENCE246-0923 (6) SCREEN GP251-2451

(2) PUMP GP

IMPLEMENT124-3761

(6) SCREEN GP251-2451

(7) FILTER GP115-2129

(7) FILTER GP115-2129

(7) FILTER GP115-2129

(7) FILTER GP

115-2129

(2) PUMP GP

IMPLEMENT124-3761



(34) SCREEN GP7J-2656

(41) SWITCH AS

LIQUID LEVEL172-8660

(35) GAGELIQUID LEVEL147-9580

(1) PUMP GPTANDEM245-8893

(6) SCREEN GP251-2451

(49) SENSOR GP

PRESSURE221-3405

(50) CONN AS222-6869

(4) VALVE102-4156

(4) VALVE102-4156

(48) VALVE GP

(RELIEF AND CHECK)247-2973

(48) VALVE GP

(RELIEF ANDCHECK)247-2973

(27) CONN

ORIFICE4I-6206

(27) CONN

ORIFICE4I-6206

(26) VALVE GP

SELECTOR140-8243

(4) VALVE102-4156

(48) VALVE GP

(RELIEF ANDCHECK)247-2973

(3) TANK

EXPANSION227-5147

(38) TANK

EXPANSION251-1073

(37) VALVE GP

BRAKER AND RELIEF220-0812

(14) VALVE GP

CONTROL241-4822

(16) VALVE

CHECK119-0913

(9) VALVE GP

CONTROL241-4821

(10) VALVE GPRELIEF142-4281

(11) VALVE GP

RELIEF9T-9197

(12) VALVE GP

RELIEF248-0020

(13) VALVE

CHECK6E-1291

(40) SENSOR GP

PRESSURE3E-6934

(50) CONN AS222-6869

(18) CYLINDER GP

TILT RH112-3171 (STD)219-6273 (HIGH)

251-2005 (SUPER HIGH)

(17) CYLINDER GPLIFT

193-4076 (STD)193-4075 (HIGH)


(19) CYLINDER GPTILT LH

112-3172 (STD)219-6272 (HIGH)


(28) VALVE GP

RELIEF245-4891

(31) VALVE GPCHECK

264-6867

(5) VALVE GP

RELIEF143-8912

(5) VALVE GPRELIEF

143-8912

(5) VALVE GPRELIEF

143-8912

(8) SWITCH AS117-7773

(8) SWITCH AS117-7773

(36) VALVE GP

BRAKER ANDRELIEF

133-1963


13/23


14/23


15/23

BRAKE OIL COOLER SYSTEM

The hydraulic brake system control consists of the following components:

- Brake oil cooler tank (1)(A)

- Brake cooler pump (2)(B)

- Brake oil cooler (3)(C)

- Rear frame (4)(D)

Also shown is the transmission (5)(E).

E

B

A

CD


16/23

BRAKE SCREENS

Right Rear Wheel Screen

Left Rear Wheel Screen

These views show the scree n (B) for the

right and left rear wheel brake cooling circuit.

They are mounted to the ax le hous ingbetween the axle housing and the trunnion.

The rear brake cooling scre ens are also

equipped with check valves (not shown) to

prevent the oil from flowin g in the wrong

direction.

The rear brake coolin g screens are also

canister type screens with replaceab le

elements.

B

B

The screens (A) for the front brakes cooling

c i rc u i t are mounte d to the f ron t ax le

housing. Each screen has a check valve

(not shown) to preven t oil from flowing in

the reverse direction.

The brake cooling screens are canister typescreens with replaceable elements.

Front Wheel Screens

A


17/23

HIGH PRESSURE SCREEN

High pressure screen (B) is between the implement pump and the relief

valve group (C). Each individual implement pump is equipped with it

own high pressure screen and relief valve. The relief valve pressure is

adjusted by rotating the adjustment screw (A).

Also , the re lief valve group (C) is equipped with a check valve (not

shown) with free flow out of the valve.

A

B

C


18/23

HYDRAULIC BRAKE SYSTEM CONTROL

The hydraulic brake system control consists of the following components:

- Steering and brake hydraulic tank (A)

- Service brake control valve (B)

- Parking brake control valve (C)

- Brake pump (D)

- Brake accumulators (E)

- Check Valves (F)

- Divider Block (G)

Also shown for relationship of the brake components on the machineare

the left side steering cylinder (H) and the rear frame (J).

J E H

D A

C BE

F

G


19/23

HYDRAULIC BRAKE PUMP

This illustrati on shows the location of the brake pump (D) and the

checkvalve (9) on the rear pump drive (F).

Also shown i s the st eering and brake hydraul ic tank (A) and brake

cooling tank (E). Installed on the steering and brake hydraulic tank are

the temperature sensor (C) and the liquid level switch (B) (the liquid

lev el swi tch is loc ate d on the oppo sit e s id e of the tank ). The

temperatu re sensor for the steering and brake hydra ulic oil (C)

communicates with the VIMS module. The liquid level switch (B) for the

oil in the steering and brake hydraulic tank communicates with the

VIMS module.

Also shown are the steering and brake oil cooling pump (H) and theho se (G) that is con nec te d to the di vid ing bloc k fo r the brak e

accumulators (not shown).

A B

C

E

G

J

F

H


20/23

IMPLEMENT CONTROL VALVES

This illustration shows the components in the right side

implement control valve. The controlvalve is accessed from

the articulation hitch. The following is a list of the components.

(A) - Inlet port for the right fixed displacement implement pump

(B) - Tilt rod end port

(C) - Tilt load check valve

(D) - Check valve

(E) - Tilt head end port

(F) - Check valve

(G) - Lift rod end port

(H) - Lift head end port

(J) - Check valve

(K) - Makeup and vent valve

(L) - Lift load check valve

(M) - Hydraulic tank port

This illustration shows the components in the left side

i l l l Th l l i d f

Right Side Implement Control Valve

A C

B

H

J

D

L G

K

E

F

M

C D GB

A


21/23

PRESSURE TAPS

2

1

39 4 5 6 78

KK

JJ

GG

HH

FF

EE

DD

CC

VIEW ALL CALLOUTS


22/23

PRESSURE TAPS

AA

BB

CC

DD

EE

FF

HHJJ

VIEW ALL CALLOUTS


23/23

VALVE GROUP IMPLEMENT SYSTEM

13 12

1110

VIEW ALL CALLOUTS

plano hyd 994f.pdf

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