CAT 920 930 930T & 930T SERIES II Wheel Loaders Electrical System & Hydraulic System Schematic Manua

SENR2863 November 1982

920, 930, 930T & 930T SERIES II Hydraulic System 920

930

41J1-UP 75J1-UP 62K1-UP

71H1-UP 79J1-UP 41K1-UP 73U1-UP

930, 930T & 930T Series II 17B1-UP

© 1982 Caterpillar All Rights Reserved

Printed in U.S.A.

ITEM 1

2 3 4 5

6 7

8 9 10 11 12

13 14 15 16 17 18 19

A B C D E

DESCRIPTION RELIEF VALVES (FOUR) a. HEAD END TILT CIRCUIT b. ROD END TILT CIRCUIT c. HEAD AND ROD END - ATTACHMENT MAIN CONTROL VALVE - LIFT AND TILT MAIN RELIEF VALVE MAKE-UP VALVES (TWO) HEAD AND ROD END LIFT CIRCUITS CONTROL VALVE - ATTACHMENT a. MUTIPURPOSE BUCKET b. SIDE DUMP BUCKET TILT CYLINDERS (TWO) ATTACHMENT CYLINDERS a. MUTIPURPOSE BUCKET b. SIDE DUMP BUCKET (ONE ONLY) LIFT CYLINDERS (TWO) STEERING VALVE STEERING CYLINDERS (TWO) NOT USED HYDRAULIC PUMPS a. IMPLEMENT b. STEERING FILTERS HAND METERING UNIT (STEERING) NOT USED DIVERTER VALVE (STEERING) HYDRAULIC PUMP (WHEEL DRIVEN) SUPPLEMENTAL STEERING NOT USED TANK GROUP

PRESSURE TAPS TEE TEST - IMPLEMENT TILT CIRCUIT - ROD END TILT CIRCUIT - HEAD END LIFT CIRCUIT - HEAD END TEE TEST - STEERING

SENR2863 6 Page, UHE

Harness And Wire Electrical Schematic Symbols

KENR9550 July 2009

Symbols

T

Pressure Symbol

Temperature Symbol

Level Symbol

Flow Symbol

Circuit Breaker Symbol

Symbols and Definitions Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it.

Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has screw terminals and a wire can be disconnected from it.

Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.).

No circle indicates that the wire cannot be disconnected from the component.

Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.

Ground (Case): This indicates that the component does not have a wire connected to ground.

It is grounded by being fastened to the machine.

Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.

920, 930, 930T and 930T Series II Wheel Loaders Electrical System

T

Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity.

It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay.

930: 41K1-UP 73U1-UP

Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.

Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.

Harness and Wire Symbols Wire, Cable, or Harness Assembly Identification: Includes Harness Identification Letters and Harness Connector Serialization Codes (see sample).

Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)

L-C12 3E-5179

AG-C4 111-7898

L-C12 3E-5179

1

Part Number: for Connector Plug

Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness (C1, C2, C3, ...).

Part Number: for Connector Receptacle

2 Plug

Receptacle Pin or Socket Number

1 2

Deutsch connector: Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.

1 2

Sure-Seal connector: Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.

5A Fuse (5 Amps)

9X-1123

Component Part Number

325-AG135 PK-14 Wire Gauge Wire Color

(Dimensions: 39 inches x 28 inches)

Printed in U.S.A.

30 Page,

© 2009 Caterpillar, All Rights Reserved

Harness identification code: This example indicates wire group 325, wire 135 in harness "AG".

KENR9550

920: 62K1-UP 75J1-UP

Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure.

8

7

6

5

4

3

2 STOP LAMP PRESSURE SWITCH

1

TO POWER SUPPLY

O

INDICATOR LAMP (RH)

O

O

AIR PRESSURE SWITCH

LOW AIR PRESSURE SWITCH

TURN SIGNAL and HAZARD WARNING SWITCH

GY/B

LT O

TO POWER SUPPLY

ENGINE OIL PRESSURE SWITCH HOUR METER

O

ATTACHMENT: FUSE HOLDER

O

LAMP (RH) STOP TAIL TURN

F

GY/B

T T/W

T/W

W/O

W/O

Y

1 2 5

O/B

GY

GY

GY GY/B

ATTACHMENT: AIR CONDITIONER

PU

O

M

6 4

O

PU

ATTACHMENT: FUSE HOLDER

O

INDICATOR LAMP (LH)

3

FRONT: TURN SIGNAL (LH)

O/B

BATTERY 12 VOLT

TEST CIRCUIT PRESSURE SWITCH

LAMP (LH) STOP TAIL TURN

PU

R

BRAKE INDICATOR SWITCH

BR

B/W

DISCONNECT SWITCH

BR

BR

O

O

T/W

O

B

W

BUZZER

F

B

W/O

PARKING BRAKE INDICATOR

W/O

BRAKE INDICATOR SWITCH

DK BL

FLASHER UNIT

Y

GY

ST O/B

HEAT START SWITCH

W

R

R

60 A

STARTING MOTOR

AMP METER

R

HT

B

FRONT: TURN SIGNAL (RH)

W/O

PU

O

W/O

PU W

ATTACHMENT: TURN SIGNAL (LH)

TO POWER SUPPLY

O

BR

ATTACHMENT - TURN SIGNAL

O

GLOW PLUGS

E

R

E

R

G

DK GR

W

DK BL

10 AMP

ALT

GY

STOP LAMP PRESSURE SWITCH

R

PU

W

DASH LAMPS

DK BL

(+)

FRONT FLOOD LAMP

BLOWER MOTOR

DK GR

3.5 AMP

B

W

R

B

LT GR

DK BL

TO POWER SUPPLY

W

W

WIPER SWITCH

O O O

STOP - TAIL LAMP (LH)

FRONT FLOOD LAMP

B

PU

D

HEATER SWITCH

BRAKE LAMP INDICATOR

O

T

REAR FLOOD LAMP

B

O

BR

BR

T

T

O

O

BR

W

DK GR

ATTACHMENT: SUPPLEMENTAL STEERING INDICATOR LAMP

WIPER MOTOR

O W

GY GY

15 AMP

O

O

LIGHT SWITCH CAB: FLOOD LAMPS O

LIGHT SWITCH

FD

TO SPARE FUSE HOLDER

HT B

D

15 A R

O

BR

ATTACHMENT: TURN SIGNAL (RH)

10 AMP

O

Y

O

ATTACHMENT (CAB) - WIPER, HEATER and FLOOD LAMPS

15 AMP

DK BL

W

DK BL

Y

Y

R

R

T

T

R

R

DK BL

DK BL ATTACHMENT: STOP - TURN - TAIL

Y

Y

GY

GY BR

TO HOUR METER HEATER START SWITCH

GY

C BR

ENGINE OIL PRESSURE SWITCH

DK BL

DK BL O

FUSE BLOCK

O

ELECTRIC CLUTCH COMPRESSOR

TO AMMETER (+)

B/W

O

A

BR

PU

R

B

AIR CONDITIONER UNIT

C

20 AMP RELAY

E BACKUP ALARM SWITCH

BACKUP ALARM

B/GY

ATTACHMENT: TURN SIGNAL

C

ATTACHMENT - AIR CONDITIONER

T/W W/O

ATTACHMENT: TURN SIGNAL SWITCH

STEERING INDICATOR LAMP

GY B

R/Y

LT-BL/BR

O LT-BL/BR

(Dimensions: 39 inches x 28 inches)

30 Page,

KENR9550

15 AMP

O/B

W

15 AMP

DK GR

Y

Y

Y

PU

W/O

F

B/W

T

DK GR

Y

PU

O

O/B

D B

FLOW INDICATOR SWITCH

B

BR

DK GR

TO BRAKE LAMP INDICATOR

W/O

O/B

TO LIGHT SWITCH TERMINAL “B”

DK GR

ATTACHMENT - SUPPLEMENTAL STEERING (INDICATOR LAMP) WIRE COLORS

SYMBOL

(R) RED (O) ORANGE SCAVENGE PUMP (DK BL) DARK BLUE (PU) PURPLE (DK GR) DARK GREEN (B) BLACK (W/O) WHITE / ORANGE (T/W) TAN / WHITE (B/W) BLACK WHITE (W) WHITE (Y) YELLOW (T) TAN (BR) BROWN (GY) GRAY (O/B) ORANGE / BLACK (GY/B) GRAY / BLACK (R/Y) RED / YELLOW (LT-BL/B) Lt BLUE / BROWN

DESCRIPTION CIRCUIT CONNECTED CIRCUIT NOT CONNECTED ELECTRICAL CONNECTION TO MACHINE STRUCTURE INTERNAL ELECTRICAL CONNECTION TO SURFACE OF COMPONENT CONNECTOR

A

Connector Pins R W

R PU

H#

ATCH WIRE, CABLE, COMPONENT

Y

BR T

GY O/B

GY/B

O

O

W/O

T/W

A

B 8

DK GR

O/B

GY

DK BL

CIRCUIT GROUPING DESIGNATION

C

Y T

Y

DK BL

SPLICE BLADE, SPADE, RING OR SCREW TERMINAL

THIS ELECTRICAL SCHEMATIC IS FOR THE: 920, 930, 930T and 930T SERIES II WHEEL LOADERS MEDIA NUMBER: KENR9550

W/O

D 7

BR GY

E

Components are shown installed on a fully operable machine.

F 6

Refer to the appropriate Service Manual for Troubleshooting, Specifications.

5

4

3

2

1

A