RE

NR

9980

16 P

ag

e

RENR9980May 2006

330D ExcavatorHydraulic SystemB6H1-UPJLP1-UPHAS1-UPEDX1-UPT2Y1-UP

© 2006 CaterpillarAll Rights Reserved

Printed in U.S.A.

Hydraulic Symbols (Electrical)

Electrical Symbols Table

325-AG135 PK-14

Circuit IdentificationNumber

Wire Color Wire Gauge

Harness identification codeThis example indicateswire 135 in harness "AG".

325-PK-14

Wire Gauge

Wire Color

Circuit Number Identification

Wire Number Identification Codes

Current Standard

Previous Standard

Electrical Schematic Example Hydraulic Schematic Example

325-PK

Wire ColorCircuit Number Identification

B A

Wire

Wire

(EXAMPLE VALVE)

Current Standard

Transducer(Fluid)

Transducer(Gas / Air)

G

Generator

Electrical WirePressure Switch

MElectric Motor

Pressure Switch (Adjustable)

Temperature Switch

T

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

ONE POSITION TWO POSITION THREE POSITION

VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

LINES CROSSING LINES JOINING

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

PRESSURECOMPENSATION

PUMP: VARIABLE andPRESSURE COMPENSATED

ENERGY TRIANGLESHYDRAULIC PNEUMATIC

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONERPUMP or MOTOR

FLUID POWER SYMBOLS

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROL SYMBOLSRELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOIDor MANUAL

SOLENOIDand PILOT

SOLENOID and PILOT or MANUAL

COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

HYDRAULIC AND PNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASICSYMBOL

SPRINGLOADED

CHECK VALVES

TWOPOSITION

INFINITEPOSITIONING

FLOW IN ONEDIRECTION

FLOW ALLOWED INEITHER DIRECTION

THREEPOSITION

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P TSHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOTCONTROLLED

Heavy Lift and Fine Swing

Description PartNumber

MachineLocation

SchematicLocation

ACCUMULATOR - HYDRAULIC (PILOT OIL) 164-6981 1 B-6

CYLINDER GP - BOOM 2 G-3

CYLINDER GP - BUCKET 3 G-10

G-9CYLINDER GP - STICK 4

FILTER GP - OIL (HYDRAULIC RETURN) 188-4140

5

A-9

FILTER GP - OIL (PILOT) 158-8987

6

A-5

FILTER GP - OIL (CASE DRAIN) 126-2075

7

MANIFOLD GP - CONTROL (PILOT OIL) 215-5037 B-88MOTOR GP - PISTON 234-4638 A-109

PUMP GP - PISTON (HYDRAULIC FAN) 259-0815 B-412

A-6

10MOTOR GP - SWING 200-3373

11

G-8

MOTOR GP - TRAVEL 271-6376

13

G-5, G-7

14

PUMP GP - PISTON (MAIN) 283-6116

234-4440

15

B-3

F-6SWIVEL GP

16

204-2819

17

F-5, F-7

VALVE GP - PILOT (TRAVEL) 270-5947

18

E-10

VALVE GP - SHUTTLE 185-0462

19

C-10

VALVE GP - CHECK (OIL COOLER BYPASS) 190-7745

20

B-10

VALVE GP - LOAD CONTROL (STICK DRIFT RED, RELIEF LINE) 255-5680

21

E-7

VALVE GP - LOAD CONTROL (BOOM DRIFT RED, RELIEF LINE) 255-5683

22

E-3

VALVE GP - MAIN CONTROL 285-1540

23259-7732 B-624

VALVE GP - SWING CUSHION (FINE SWING)

VALVE GP - TRAVEL COUNTERBALANCE

158-9090 F-826

VALVE GP - SOLENOID (HEAVY LIFT) 121-6303 B-625

D-2

27

VALVE GP - PILOT CONTROL (LEFT JOYSTICK) 270-5951 D-10

VALVE GP - PILOT CONTROL (RIGHT JOYSTICK) 270-5952 D-9

VALVE GP - PRESSURE REDUCING (BOOM,SWING PRIORITY) 232-4102 B-6

COMPONENT LOCATIONS

MACHINE COMPONENT LOCATIONS

Tap LocationsPressure, Sampling, and Sensor

TapNumber Description Schematic

LocationAA Pilot Filter Pressure Test Port A-6BB Drive Pump Pressure Test Port B-2CC Power Shift Pressure Test Port A-2

SOS Hydraulic Oil Sampling Port A-5DD Idler Pump Pressure Test Port A-2

NOTE A

NOTE A

NOTE A

Note A: Refer to Parts Manual for your specific machine.

19 2120

2

14

3

5

16

2711

12

9

2711 2610

22

25

13

7

4

6

23

17 18

15

8 24

1

Pump Compartment

(A) Delivery line (Drive Pump)(B) Delivery line (IdlerPump)(C) Drive Pump(D) Idler Pump

11

27

18

16

9 DC

A B

17

7

5 6

10

26

14

MOTOR GP - PISTON (TRAVEL) FILTER GP

MOTOR GP - SWING & SWIVELVALVE GP - MAIN CONTROL

PUMP GP - PISTON (MAIN)

SOS AABB

CC

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NR

9980

16

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LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing Pressure

Pressure Line

Attachment

Air Line

CALLOUTS

Taps (Pressure, Sampling, Sensor) by letter

Components by number

Connections by letter

YY

1

AA

THIS SCHEMATIC IS FOR THE 330D EXCAVATOR - HEAVY LIFT AND FINE SWINGPART #: 259-7414 HE01Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral.

Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations

DRAIN / RETURN LINE

LINES GROUP COLOR DESCRIPTIONSIMPLEMENT & LEFT TRAVEL PUMP OUTPUT

IMPLEMENT & RIGHT TRAVEL PUMP OUTPUT

PILOT PUMP OUTPUT

ATTACHMENT CONTROL CIRCUIT

SUPPLY LINE

BUCKET CONTROL & BUCKET CYLINDER CIRCUIT

RIGHT TRAVEL CONTROL & RIGHT TRAVEL MOTOR CIRCUIT

FAN PUMP OUTPUTPOWER SHIFT CONTROL CIRCUITTRAVEL SPEED CONTROL CIRCUIT

STICK CONTROL & STICK CYLINDER CIRCUITSHUTTLE VALVE CONTROL CIRCUIT

BOOM CONTROL & BOOM CYLINDER CIRCUITHEAVY LIFT CONTROL CIRCUIT

LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUITSWING CONTROL & SWING MOTOR CIRCUIT

A

B

C

D

E

F

G

12345678910

12345678910

A

B

C

D

E

F

G

AL3 BL3AR3 BR3

AR4 BR4

STICK CYLINDER

PUMP GPPISTON (MAIN)283-6116

R.C.V.: RETURN CHECK VALVE

BUCKET CYLINDERBOOM CYLINDER

VALVE GPSHUTTLE259-7732

FILTER GPOIL (PILOT)158-8987

VALVE GPSOLENOID(HEAVY LIFT)121-6303

VALVE GPPRESSURE REDUCING(BOOM, SWING PRIORITY)232-4102

ACCUMULATOR GP164-6981

FILTER GPOIL(CASE DRAIN)126-2075

MANIFOLD GPCONTROL (PILOT OIL)215-5037

FILTER GPOIL(HYDRAULICRETURN188-4140

MOTOR GPPISTON234-4638

VALVE GPCHECK (OILCOOLER BYPASS)190-7745

VALVE GPLOAD CONTROL(STICK DRIFT RED,RELIEF LINE)255-5680

VALVE GPLOAD CONTROL(BOOM DRIFT RED,RELIEF LINE)255-5683

VALVE GPMAIN CONTROL285-1540

VALVE GPTRAVEL COUNTERBALANCE204-2819

MOTOR GPSWING200-3373

MOTOR GPTRAVEL271-6376

VALVE GPSWING CUSHION(FINE SWING)158-9090

bR1 aR1aL1 bL1

TRAVEL(L) TRAVEL(R)

VALVE GPPILOT (TRAVEL)270-5947

T1 T5BACKFWDBACK FWD

TTTP

T2 T4 T6 T3

PRESSURE SWITCH PRESSURE SWITCH

aR3 aR4 bR3 bR4 bL3 bL2 bL4 aL2

JLP JLT

STICK SWING

OUT

JL1INJL3

R LJL2 JL4

BUCKET BOOM

OPEN CLOSE DOWN UPJR1JR2 JR3JR4

A1 A2 A3 A4 A5 A6 A7 A8

B1 B2 B3 B4 B5 B6 B7 B8

VALVE GPSHUTTLE185-0462

JRT

VALVE GPPILOT CONTROL(LEFT JOYSTICK)270-5951

VALVE GPPILOT CONTROL(RIGHT JOYSTICK)270-5952

JRP

PRESSURE SWITCH

R.C.V-A

R.C.V-B

R.C.V-C

A

C

B

D

DR1 DR

B A

L3 L2

E F

G

SLOW RETURN BYPASS

OIL COOLER

RETURN

INOUT

T

T P

DRAIN

TRAVEL BRAKE

ABA B

AG

Pp3Pp3

T1

T2

T1

T2

BGBGAG

TRAVEL MOTOR (LEFT) TRAVEL MOTOR (RIGHT)

MOTOR GPTRAVEL271-6376

VALVE GPTRAVEL COUNTERBALANCE204-2819

SWIVEL GP234-4440

BL1 AL1 BR1 AR1

TRAVEL BRAKE

AL2BL2

PG

DR

MU

BG AG

B A

SWING MOTOR

DRA1B1

R.C.V-C

P2 Pi1 DR1

DR2

DR3 DR4 DR5 DR6

P-IN PSA1PSA2

T-OUT1

T-OUT2

Pi2

NO.1

(TRAVEL)

NO.2

(SWING)

NO.3

(LOCK)

P1

TRAVEL SPEED SWINGPRIORITY

PAC

bL3bL4 bL2

aL2

bR4 HR

aR4

bR3

aR3

aL1

bL1

aR1

bR1

R.C.V-B

R.C.V-AAL2

BL2 BL1

AL1 AR1

BR1

BR4

AR4

BR3 AR3

AL3BL3

PR

PRPL

PL

HL

HL

HR

PRESSURE SENSOR

D

I

LEFT

PUMP

RIGHT

PUMP

PRESSURE SENSOR

BOOM DRIFT REDUCTIONSTICK DRIFT REDUCTION

PROPORTIONALREDUCING VALVE

MAINRELIEF

A

P1 P2

Di2

BOOM(2)

Di3Pi2 Pi3

A1 B2 A2

T

S

B

LL1

A4 S1Dr1

D1 Ps2

D0 Ps1

Pi1

a4

a1

M1

Psv

a3

M2

a5a2

Pi2

DST Pi5 bR2 Di1 bR5

BR4

BP1 BT

R1 BR5 AR5

aR5 R3

(IN)

BP3

BDr

BPi

BP2

Pi1

(DOWN)(CLOSE)

AR2BR2aR2

(BACK)(BACK)

Di4 Pi4

(L)(IN)

aL3SP1 ST

BL3 R2

T AL4 aL4

(UP)

SP3

SDr

SPi SP2

STICK(1)

SWING

TRAVEL(L)

TRAVEL(R)

ATCH

BUCKET

(OPEN)(FWD)(R)(OUT)

BOOM(1)

STICK(2)

(OUT)(UP)

PUMP GPPISTON(HYDRAULIC FAN)259-0815

PG PC

AAPILOTFILTERPRESSURE

SOSHYDRAULICOILSAMPLING

DRIVE PUMP PRESSURETEST PORT

POWER SHIFT PRESSURETEST PORT

IDLER PUMP PRESSURETEST PORT

DD

BB

CC