Cat Electrical M318 and M320 Excavators Electrical System Schematic Manual - PDF DOWNLOAD

Part No.

Resistor, Sender and Solenoid Specifications Component Description

3E-1906

Solenoid:

8C-3663

Solenoid:

Engine Start/Stop

Solenoid:

Aux. Hyd and Cab Riser Blade Front Blade Rear Hammer Heavy Lift Left Front Stabilizer Lockout Left Rear Stabilizer Lockout Parking Brake Right Front Stabilizer Lockout Right Rear Stabilizer Lockout Transmission Speed

8U-6424

172-7029

112-7178

116-4710

122-2373

Solenoid:

Sender:

Sender:

Resistor:

Resistance (Ohms)¹

A/C Clutch

19

OSC Axle Lock Creeper Speed Swing Brake Travel Activation Implement Activation

33.8/17 Watt

Full = 0.4 Empty = 70.6

Fuel Level

Hydraulic Oil High Temperature

Component

17.6 ± 0.6 Latch Coil : 1.55 ± .15 Unlatch Coil: 10.3 ± 1.03

38.5 @ 100 ºC (212 ºF) 51.2 @ 90 ºC (194 ºF) 134 @ 60 ºC (140 ºF)

Position 1 = 6 Position 2 = 1.5

Heater Fan

124-0329

Resistor:

Backup Main Pump PRV Backup Swing Pump PRV

Overall 6.0; Tap 1.5 or 4.5

143-8251

Resistor:

Backup Main Pump PRV Backup Swing Pump PRV

59 ± 1.18/25 Watt

¹ At room temperature unless otherwise noted.

Schematic Location

AEC - Aux. Hyd.

Title

Form Number SENR3685

Starting Motor: 8C-4774

Component

Schematic Location

Machine Location 16

F-8

D

Solenoid- Main Pump PRV

G - 14

C - 13

2

Solenoid - OSC Axle Lock

F - 14

8

Alternator Fuse

C - 15

5

Solenoid - Parking Brake

F - 14

11

Battery 12v (2)

H - 13

3

Solenoid - Right Front Stabilizer Lockout

G-1

18

Cigar Lighter

F-2

A

Solenoid - Right Rear Stabilizer Lockout

H - 10

27

Converter 24v - 12v

D-3

A

Solenoid - Start

C-14

18

Diode - A/C

E - 13

D

Solenoid - Swing Brake

G - 15

16

Diode - AEC - Aux. Hyd.

F-8

D

Solenoid - Swing Pump PRV

G - 14

16

Diode - Brake

D-6

D

Solenoid - Transmission Speed

F - 13

11

Diode - Harness AS

B-8

D

Solenoid - Travel Activation

G - 15

Diode - HCR & AEC

F-8

D

Secondary Steering Control

H - 14

16 4

Diode - Stop Lamp

E-8

D

Switch - AEC

B - 10

C

Diode - Temp

E-6

D

Switch - AEC Boom Cyl. Pressure

E - 15

19

Engine Control

C - 12, B - 12

A

Switch - AEC Implement Travel

F - 15

19

Engine Pump Control

B - 11, C - 11

A

Switch - AEC Stick Cyl. Pressure

E - 15

19

Engine Speed Dial

C-2

C

Switch - AEC Swing Pressure

E - 15

16

Flasher

F-7

C

Switch - Air Filter Clog

C - 15

20

Fuse Block (A Black)

F - 10

D

Switch - Air Horn

G-2

A

Fuse Block (B Yellow)

F-9

D

Switch - Aux. Hyd. (ccw rotation)

E-3

B

Fuse Block (C Green)

E - 10

D

Switch - Aux. Hyd. (cw rotation)

D-3

C

Fuse Block (D Red)

E-9

D

Switch - A/C

B - 11

C

Governor Actuator

C - 13

6

Switch - A/C Pressure

E - 14

8

Hour Meter

E-5

D

Switch - Backup

C - 11

C

Main Fuse

G-8

D

Switch - Beacon

B-5

C

Monitor Panel

C-2

C

Switch - Brake Light

H-5

21

Motor - Air Conditioner Fan

E - 14

8

Switch - Cab Riser

B-7

C

Motor - Heater Fan

B-8

10

Switch - Cab Riser (Up)

C-5

C

G - 13

11

Switch - Cab Riser (Down)

C-5

C

Motor - Lower Wiper

E-1

12

Switch - Coolant Temp

D - 13

2

Motor- Refueling Pump

H - 13

9

Switch - Coolant Temp

C - 13

5

Motor - Starter

C - 14

5

Switch - Creeper Speed

C-6

C

Motor - Secondary Steering

H - 12

4

Switch - Disconnect

H - 12

3

Motor - Upper Washer

G - 13

3

Switch - Engine Oil Pressure

D - 13

8

E-2

A

Switch - Forward/Reverse Travel Alarm (2)

H - 6, G - 6

21

F-2

Motor - Lower Washer

Radio

Alternator: 9W-3043

Machine Location

Alternator

Motor - Upper Wiper

Related Electrical Service Manuals

Component Location

C-5

C

B - 10

A 10

Switch - Front Flood Lamp

Regulator - A/C Temperature

Switch - Hammer

B-8

C

Relay - A/C Clutch

D - 13

D

Switch - Hazard

B-4

C

Relay - A/C Fan

E - 13

D

Switch - Head Lamp

D-5

C

Relay - Air Horn

E-7

D

Switch - Heater Fan

B - 10

C

Relay - Alarm Cab Riser

F-5

C

Switch - Heavy Lift

C - 10

C

Relay - Brake

F-6

D

Switch - Horn/Turn/High Beam

G-3

A

Relay - Brake/Travel Cutoff

D-5

D

Switch - Hyd. Oil Filter Clog

E - 14

24

Relay - Interval Wiper

G-6

D

Switch - Hyd. Oil Low Temperature

E - 14

23

Relay - Main Power

F-7

D

Switch - Hyd. Oil High Temperature

E - 14

23

Relay - Pilot Press Enable

F-7

D

Switch - Key (Start)

C-7

C

Relay - Power Mode

F-6

D

Switch - Left Front Stabilizer Lockout

C-9

C

Relay - Start

C - 15

5

Switch - Left Rear Stabilizer Lockout

C-9

C

Relay - Start/Stop

E-7

D

Switch - Low Brake Pressure

G-5

21 11

Relay - Secondary Steering

G - 13

4

Switch - Low Transmission Clutch Pressure

F - 13

Relay - Secondary Steering

H - 13

D

Switch - Lower Windshield

E-2

A

Relay - Stop Lamp Cutoff

E-7

D

Switch - Lower Wiper

C-7

C

Relay - Swing Brake Timer

G-5

D

Switch - OSC Axle Lock

C-5

C

Relay - Temperature

E-6

D

Switch - Overload Warning Device

A-5

C

Relay - Transmission Speed

F-6

D

Switch - Overload Warning Device

C-8

25

Relay - Travel Alarm

F-5

D

Switch - Parking Brake

B-5

C

Relay - Travel Cutoff

F-5

D

Switch - Pilot Control Lock

B-5

B

D

Switch - Power Mode M318 Only

D-6

C

Consist: 8C-4773

SENR3559

Consist: 3E-1944

SENR3581

Resistor - Backup Main Pump PRV

E - 10

Consist: 106-8558

SENR3559

Resistor - Backup Swing Pump PRV

E - 10

D

Switch - Power Mode M320 Only

D-6

C

Electronic Control Systems

SENR6265

Resistor - Heater Fan

B-8

10

Switch - Primary Steering Flow

G-4

21

Sender - Coolant Temperature

D - 12

2

Switch - Rear Flood Lamp

C-5

C

Sender - Fuel Level

F - 14

13

Switch - Refueling Pump

E-5

D

Sender - Hydraulic Oil High Temperature

E - 14

23

Switch - Reverse Steer Proximity

B-5

26

Sensor - Engine Speed

D - 15

14

Switch - Right Front Stabilizer Lockout

B-9

C

Solenoid - Aux. Hyd and Cab Riser

H - 14

D

Switch - Right Rear Stabilizer Lockout

B-9

C

Solenoid - Aux. Hyd. (cw)

G - 15

16

Switch - Start Aid

C - 10

C

Solenoid - Aux. Hyd. (ccw)

G - 15

16

Switch - Starting Pilot Pressure Enable

D-4

B

Solenoid - A/C Clutch

D - 14

15

Switch - Step Door Safety

B-6

A

Solenoid - Blade Front

G-1

27

Switch - Stop Lamp Cutoff/OSC Blocked

G-2

A

Solenoid - Blade Rear

H - 10

17

Switch - Swing Brake

E-3

B

Solenoid - Cab Riser (Down)

H - 15

D

Switch - Swing Brake

E-7

D

Solenoid - Cab Riser (Up)

H - 14

D

Switch - Transmission Speed

C-6

C

Solenoid - Creeper Speed

F - 15

16

Switch - Travel Alarm Cancel

C-5

C

Solenoid - Engine Start/Stop

D - 13

6

Switch - Travel Lock

B-6

C

Solenoid - Hammer

E - 13

16

Switch - Travel Pedal

H-2

A

Solenoid - Heavy Lift

F - 15

16

Switch - Upper Washer

B-8

A

Solenoid - Implement Activation

G - 15

16

Switch - Upper Windshield

E-2

A

Solenoid - Left Front Stabilizer Lockout

G -1

18

Switch - Upper Wiper

B-7

C

Solenoid - Left Rear Stabilizer Lockout

G - 10

27

Travel Lock Magnet

H-2

A

RENR4035 June 2000

7

5

2

14

15

20

6

26 19

25

18

23

22

21

28

17 13 11

8 D

10

A

27

24 16

C

30

29

4

12

1

3 9

B

M318 and M320 Excavators Electrical System M318: 8SS470-UP

A 25 C 19

13 24

15 22

6

8

B

2

16

26

21 7

4

29

1

20

11

23

14

D

28 12

3

M320: 9PS287-UP

30

5

9

27

10

18

17

Machine Harness Connector and Component Locations © 2000 Caterpillar All Rights Reserved

A

T

Pressure Symbol

B = Located Inside Of RH Console C = Located Inside Of LH Console

Detected Faults

D = Located Around Relay Panel

Error Message

Schematic Location

Machine Location

CONN 1

H - 14

9

CONN 2

G - 13

4

CONN 3

E - 13

8

CONN 4

C - 12

6

CONN 5

G - 12

4

CONN 6

G - 12

4

CONN 7

C -11

6

CONN 8

D - 11

6

CONN 9

E - 11

6

CONN 10

F - 11

6

CONN 11

G - 11

6

CONN 12

H - 10,G - 10

17

CONN 13

C -10

C

CONN 14

D - 10, 9, 8

6

CONN 15

D-2

A

CONN 16 CONN 17

G-1 D-1

18 18

Logged

Main Pump Circuit

No

Low Voltage

No

RPM Setting Diff

No

RPM Setting High

No

RPM Setting Low

No

Swing Pump

The connectors shown in this chart are for harness to harness connectors.

Connectors that join a harness to a component are generally located at or near the component. See the Component Location Chart.

No

Function

3E-6429

Primary Flow

3E-6455

Engine Oil Pressure

5W-9972

Low Brake Pressure

114-5333

A/C Pressure

116-4710 119-3399 119-3400

Hydraulic Oil High Temperature Coolant Temperature Hydraulic Oil Low Temperature

171-7570

Low Transmission Clutch Pressure

163-2084

AEC Swing Pressure Boom-Cyl Pressure Stick-Cyl Pressure

Actuate

Deactuate

Contact Position

4.0 grams MAX

1.5 grams MIN

Normally

(0.14 oz)

(0.05 oz)

Open

90±21 kPa

70±21 kPa

Normally

(13±3 psi)

(10.2±3 psi)

Open

10132 kPa (1470 psi)

--

Normally Open

Low 275 kPa (39.9 psi) MAX

Low 170±55 kPa (24.6±7.9 psi)

Normally

High 2800±140 kPa (406±20.3 psi)

High 1750±200 kPa (254±29 psi)

Open

94 ºC 201 ºF 100 ºC 212 ºF

---

11 ºC

17 ºC

52 ºF

63 ºF

2600 kPa (377 psi) 507 kPa (74 psi)

--

--

Normally Open

Result Of Fault • Main pump set to minimum output.

• High idle speed too high.

• Engine stall speed too high or low.

• Governor actuator position signal too low.

• Open or shorted supply voltage circuit.

• High idle stop passed or engine speed adjustment is loose.

• Swing pump set to minimum output.

• Swing pump PRV solenoid faulty.

• Open in harness wiring for swing PRV solenoid.

• Harness wiring for swing PRV solenoid shorted to ground.

• Signal from engine speed sensor indicates engine speed is below 750 ± 25 rpm.

• Engine speed sensor is not adjusted properly or is faulty.

• Open in harness wiring form engine speed sensor to controller.

• Harness wiring for engine speed sensor is shorted to ground.

• Engine speed dial signal circuit is shorted to ground.

No

High Engine Speed

Yes

• Engine overload.

• Engine stalls.

RPM Dial Setting

Yes

• Engine speed set to high idle (No effect on AEC or Heavy Lift operation).

Heavy Lift Circuit

Yes

• Heavy lift does not operate correctly.

Yes

• Power mode 1 selected no matter what the position of the power mode switch.

Yes

• Power mode 1 selected no matter what the position of the power mode switch.

Mode SW Open

Mode SW Short

Level Symbol

Flow Symbol

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

Receptacle

Plug

1 2

1 2

2

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

Possible Causes

• Battery voltage below 17 DCV.

Low Engine Speed

Temperature Symbol

• Main pump PRV solenoid faulty.

• Open in harness wiring for main PRV solenoid.

• Harness wiring for main PRV solenoid shorted to ground.

• None • Engine operates at high idle (No effect on AEC or Heavy Lift operation).

• Low idle speed too low.

• Engine stall speed too high or low.

• Hydraulic pump outputs are reduced.

Off Machine Switch Specification Part No.

AA 1

A = Located Inside Of Cab

Connector Number

Harness And Wire Electrical Schematic Symbols

Electrical Schematic Symbols And Definitions

Machine locations are repeated for components located close together.

Connector Location

Printed in U.S.A.

• Engine speed requested does not match the actual governor actuator position.

• Governor actuator position signal too high.

• Open or shorted supply voltage circuit.

• Low idle stop passed.

• Signal from engine speed sensor indicates engine speed is above 2150 ± 200 rpm.

• Incorrect number of flywheel teeth specified in parameter settings.

• Engine speed dial is faulty.

• Engine speed dial signal circuit has an open.

• Engine speed dial supply voltage circuit has an open or is shorted to ground.

• Engine speed dial signal circuit is shorted to ground.

• Heavy lift solenoid is faulty.

• Open in harness wiring for heavy lift solenoid.

• Harness wiring for heavy lift solenoid is shorted to ground.

• Mode switch is faulty.

• Open in harness wiring for mode switch.

• Mode switch supply voltage circuit has an open or is shorted to ground.

Pin or Socket Number

Normally open switch that will close with an increase of a specific condition (temp-press-etc.).

Wire, Cable, or Harness Assembly Identification

Component Part Number

Single Wire Connector

Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition.

C

A

A 325-PK-14

Pin

Normally closed switch that will open with an increase of a specific condition.

AA 1

325-PK-14

Wire Color

Socket

2

Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.

9X-1123

200-BK-14

Circuit Number Identification

The circle indicates that the component has screw terminals and a wire can be disconnected from it.

Wire Gauge

Electrical Schematic Symbols And Definitions FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it.

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

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.

This indicates that the component has a wire connected to it that is connected to ground.

• Mode switch is faulty.

• Short to ground in harness wiring for mode switch.

T

This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.

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.

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.

Normally Open Normally Open Normally Open Normally Open

CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too much current flows through it. This does not destroy the circuit breaker and it can be reset to become part of the circuit again.

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.

15

14

GY(10) BK

GN BK

1 2

GN(4) ENGINE START/STOP SOLENOID 8C-3663

BK

GG GN BK

GN-8 BK-8 BK

L76

G BK BK

BK GY(6) WH(4) RD(26)

WH(16) BR(6)

1 2

L1

L83

ENGINE OIL SW 3E-6455

ENGINE SPEED SENSOR 6V-2455

BK-18 RD-18 BU-18

RD-4(1)

D 1 2 3

L84

BK BR/WH(1)

D

70A

N

GN-8

L76

STARTER 8C-4774

T

D

T

W

COOLANT TEMP SWITCH 127-5347

BK-4

BK-8 BK-00 D

BK BK

2 1

1 2

GN(21) WH(17) YL (5) GN(9) YL(12) BR(7) RD(21) OR(11) BU(9) BK

BK BK

TO ENGINE

RD-4(4) START RELAY 3E-0075

D

L8 T

BK BR/BK(5)

BK

G

L10

BK D

L13 L1

TO FRAME

L4

BK GN(2)

G RD(22) BK(13)

C K BK-10

G L9

CONN 4

BR(2) WH(10)

BK

BK

BB3 123-6472 24V 2 WH GND 3 BR TXD 7 GN RXD 6 YL SCHIELD

EE

A B C D E

TO FRAME BR(2) L9 WH(10) BK(13)

40 42 12 -19 22 32 33 35 37 38 39 44 45 49 50 51 02 01 ---10 34 46 36 -03 04 -30 -53 18 -29 -28 --

GOV ACTR

BK BK

D

1 2

152-0197

BK-10

CONTROL-ENGINE 143-9581

G

D BR/BK(5) GN(1) BR/WH(2) GN(2)

BR/WH(2)

L13

SOLENOID (DRE2K) SOLENOID (DRE2K)

01 02

POS IND OUT POS IND IN POS IND GND

01 02 03

SHIELD

G

WH(13) PU(10) RD BR BK

01 02 03 04

YL(6) BR(9) WH(19) G

OR(5) OR(6) OR(6)

L14

L1 L4

WH(4) GY(6) BK RD(26)

B

L11

L10

RD(23)

RD(24) BR(6) WH(16) YL(17) WH(12)

L STOP LAMP 9X-4493

WH(18) GN(23) BR(8)

L7

RD(26) BK BK

BK

16 17 01 13 19 20 03 07 10 11 04 12 22 14 23 21 06 05 24 09 15 18 02 08

SOLENOID (DRE2K) SOLENOID (DRE2K) POS INDICATOR OUT POS INDICATOR IN POS INDICATOR GND NC NC NC NC NC NOMINAL VALUE 1 PWM INPUT SIGNAL GROUND NC NC SIGNAL GROUND NOMINAL VALUE GND 2 NOMINAL VALUE 2 ACTUAL VALUE OUTPUT + ELECTRONIC OUTPUT STAGE SWITCHING INPUT GND (L0) GND (L0)

L8

L7

WH(18) GN(23) BR(8) BU(13) BK BK RD(24)

L7

WH(16) BR(6)

L5 L5

BK BK

TAIL LAMP 5W-2040

RD(11) BR(7) BU(8) YL (12) GN(9) GN(6) BU(9) YL (5) WH(17) GN(21) OR(11) PU (9) RD(21) RD(10) RD(22) RD (23)

K

RD(22)

AIR FILTER CLOG SW 5W-9934

GY(6)

WH(12) YL(17)

TO FRAME BASIC LAMP GP 116-9625

GN/YL 25A

OR(1)

3

RD(3)

2

BK (7) RD(19) BU-10(2)

1

L72

RD-10(4) RD-10(3) RD-10(8) RD-10(7)

L41

FUSE BLOCK 148-0080 C GREEN A H

RD-10(6)

G F L42 E

C B A

RD-10(5)

8

7,5A

RD(5)

7

15A

4

15A

E

L73

D C B

OR(12) GN(24) RD(28) F

1

7,5A

F

RD/YL(5)

2

7,5A

G

RD/YL(6)

3

7,5A

RD-10(8)

F RD(10) RD/YL(14) RD/YL(7)

5

7,5A

H

RD/YL (1)

6

7,5A

FUSE BLOCK 1480081 D RED A

A

RD-10(7)

7,5A 7,5A 7,5A 15A 7,5A 7,5A 20A 7,5A

8

L73

BK/PU(1) BK/PU(2) BK/GN(10)

7 6

RD(4) RD(8) RD/YL(8) RD/YL(15) RD/YL(12) RD/YL(13 ) RD/YL(9) RD/YL(11) RD-12 RD(31) RD/YL(10)

5 4 3 2 1

L93 L38

L93 F BU(15) GN(7) PU(9) PU(8)

L85 L44

F RD(28) RD(29)

M318: 124-0329 (47 M320: 143-8251 (59

BACKUP RESISTOR MAIN PUMP PRV M318/M320

L81

L86

) )

L81

BACKUP RESISTOR SWING PUMP PRV M318/M320

F

L91

GN(17) RD(35) BU(16) GN/BR(7) BK/GN(15) PU(9) PU(8) RD(34) BK/GN(3) GN/BR(2)

L28 86 87 DIODE STOP LAMP 123-5635

GN/BU(1)

L43

L38

87a

A

5 4

L87

L87

BU(18)

BR(10)

15 87

A RD(12)

87a

A 86 RD(7)

L50

A

L50 L90 L52

L44 L46

L91

L45

L40

L41

L47

87

86 87

BK/GN(8) GN(6)

30

YL(14) BK

F

TEMP. 117-4861

A

REFUELING PUMP SWITCH 8U-3011

BU-10 (1)

87a

3

AIR HORN 5W-5883 30 RD(17) RD(16) BK

85

30

BU/YL(4)

BK(12) GY(7)

+ -

L64 GN(29)

YL

RD(19)

+

RD(13) OR(12)

L50 L44 L46 L48

A BK

BU(5)

BK

WH(8)

BK GN(13)

BRAKE/ TRAVEL CUTOFF 85 117-4861

86 87

A

L78

L44

RD(14)

L57

L58

L54

L53

L59

1

L65 L84

L66

L62

L61

PU(6) OR(4) YL(17) BU(15) WH(12) GN(7)

BACKUP SW 133-8327

L66

YL(5) BU(9) OR(11)

L80

L64 L62 L61

ONLY M318 POWER MODE SW 5W-9372 5 BK

L54 L60

L60

AIR SUSPENDED DRIVER SEAT

1

BR/WH(3) BR/BK(2) GY YL(12) WH(17) GN(21) BR(7) YL(5) BU(9) OR(11)

HEAVY LIFT SW 5W-9372

7

10

1

BK

RD(3)

LEFT REAR STABILIZER LOCKOUT SW 5W-9372 5

B

7 1

10 GY

9

LEFT FRONT STABILIZER LOCKOUT SW 5W-9372 5

RD/YL(28) RD/YL(29)

7

RD/YL(5) RD/YL(27)

1

YL(9)

5

7

10

HEATER FAN SW 111-3805 AEC SW 5W-9372

1 10

5

YL(7)

BK

PU(8)

1

9

10 YL(8) BK

BK TO FRAME

B

7

9

L3

YL(13) BU(11) RD(20) BK (10) BK

GY

YL(7)

BK

A3 B3 B4 B5 C1 B1

BK

RIGHT REAR STABILIZER LOCKOUT SW 5W-9372 5

RIGHT FRONT STABILIZER LOCKOUT SW 5W-9372

7

BK (3)

5

1

WH(6) YL(18)

10

9

10

UPPER WASHER SW 2U-6635

HAMMER SWITCH 8U-7284

B 10

RD BK GY BU

RD/YL(7)

9

1

5

1

5

2

10

9

1 3

B

UPPER WIPER SW 180-2649

BK GY(1)

BK

A/C TEMP REGULATOR 3E-5464 T 1 2

L1

BU(11) RD(20) BK (10) BK YL(13)

5

BK GY

04 03 02 01

WH RD BK BR

10 BK GY GY/BK(1)

9

CREEPER SPEED SW 5W-9372

9

BK GY

B 7

3

1

PK(5)

L79

HEATER FAN 173-7421

GY(12)

BK

1

10 BK

BR(11) OR(2)

TRAVEL LOCK SWITCH 8U-6357

L79

5

7

10

RD/YL(1) 1 BEACON SW 5W-9372 9

1

B

GY

5

7

BK

8

6

2

10

9 BK

9

B 6 8 2 3 5

L69

10

9

BK

10

BK

L35

C

B

A

E A B C

MONITOR PANEL 175-7204

BK (8) GY GY

1 7

GY PILOT CONTROL LOCK SW 5W-9372

1

YL(12) BK BK BU/YL(5) YL(10) GN/WH(1) WH(2) BU(4) GN(3) BR/WH(1) BU(2) RD(1) BK/GN(11) BK/WH(4) GN/BR(5) RD/YL(18) BK/GN(9) BK

GN/BR(5) GN/BR(1) RD/YL(2) BK(7) WH(3) BK/GN(9) BK/GN(1)

BK/GN/RD(3)

B

BK

HAZARD SW 5W-9351

GY

GN(20)

PARKING BRAKE SW 133-8327

RD/YL(11) GN/BR(3) GN/BR(4)

1

3 2

BR

D

BK

ENGINE SPEED DIAL 141-6258

GN/BU(4) GN/WH(4) GY(4)

BK GY(8)

BK WH(4) TURN SIGNAL LAMP AS. 116-9626

TO FRAME

YL(12)

12

11

OR(6)

GN(20)

1 2 3

BR BK BU

RD(7) BK (1) RD/YL (11) GN/BR(3) GN/BR(4) GN/BU(4) GN/WH(4) GY(4)

+V SIGNAL GROUND

REVERSE STEER PROX. SW 151-1953

L1

B

HARNESS AS DIODE 142-9472

OVERLOAD WARNING DEVICE SWITCH 118-5501

BK YL(1)

WH(4) RD/YL(12) BU/YL(3) YL(1)

TO FRAME

L2

9

8

7

M320 PART-NO.

FUSE "D" RED

FUSE "C" GREEN

PARKING LIGHTS RHS

7,5

1

ELECTRICAL FUEL LIFT PUMP

25

1

BACKUP

7,5

1

STOP LIGHT

7,5

2

PARKING LIGHTS LHS

7,5

2

WARNING LIGHT; START/STOP SOLENOID

7,5

2

POWER MODE SELECTION; AEC; SWING BRAKE

7,5

2

AIR CONDITION

20

3

INSTRUMENT LIGHTING

7,5

3

STARTER KEY SWITCH; MAIN POWER-RELAY; LIGHT

15

3

INDIVIDUAL STABILIZERS

AWG

MM*2

7,5

12

2.5

7,5

14

1.5

16

1

7,5

5

6

HIGH BEAM RHS

7,5

6

COMPRESSOR AIR HORN

15

6

ELECTRONICS

7,5

7

HIGH BEAM LHS

7,5

7

FAN; START AID

15

7

ROTATING BEACON

15

8

CONTROL LIGHTS; TURN SIGNAL

7,5

8

CIGARETTE LIGHTER; PLUG; DOME LIGHT

7,5

8

AIR SUSPENDED DRIVER SEAT; PRIORITY

7,5

6

5

4

3

120-6919

N

121-0875

P

121-0876

R

121-0877

F-7 E-7 F-7

138-4515

E-5

GN

GREEN

Z

121-2973

138-4514

E-1

GY

GRAY

AA

122-2365

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS ON.

OR

ORANGE

BB

122-2366

E-5

PK

PINK

CC

122-2382

C-8

STARTING CIRCUIT.

PU

PURPLE

DD

8X-9618

E-1

MONITOR CIRCUIT.

RD

RED

EE

123-6475

C-7

WH

WHITE

FF

126-6801

F-7

YL

YELLOW

GG

145-9203

C-7

PANEL LAMP CIRCUIT. TURN SIGNAL AND WIPER/WASHER CIRCUIT.

180-8508 122-2364

HEATER AND AIR CONDITIONER CIRCUIT.

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS ON AND THE LEFT HAND HYDRAULIC CONSOLE IS LATCHED IN THE DOWN POSITION. START AID CIRCUIT.

2

F-8 C-1

121-2972

ENGINE AND PUMP CONTROL CIRCUIT.

WINDSHIELD WIPER LOWER AND PUMP

15

HAMMER BLOW FREQUENCY ADJUST.; FLOW CONTROL

B-6

140-1059

M

Y

GROUND CIRCUIT.

WINDSHIELD WIPER UPPER AND PUMP

WORKING LIGHTS

5

139-8284

L

X

4

8

4

7,5

E-7

K

W

6

7

7,5

START/STOP RELAY

C-1

180-8137

BLUE

8 7,5

POTENTIAL TRANSFORMER 24V ==> 12V (RADIO)

5

B-6

179-9082

J

BROWN

10

SECONDARY STEERING

4

7,5

179-9045

BLACK

10

6

7,5

LOW BEAM LHS

179-9049

H

BU

16

15

LOW BEAM RHS

5

C-6

F G

BR

6

ARM REST SWITCH; SWING GEAR; MISCELLANEOUSFUNCTION; RELAY TRAVEL CUT OFF; PARK BRAKE; TRANSMISSION SPEED; CREEPER SPEED; CAB-RISER OSC AXLE LOCK;

4

C-6

BK

4

7,5

179-9047

158-2910

50

7,5

BLUE LIGHT (REVERSE STEERING); TRAVEL ALARM

C-6

E

V

70

HORN; BUZZER (OVERLOAD); 1/3 PRESSURE DROP

4

E-6

174-9110

COLOR

0

3

C-5

179-9071

D

122-2360

00

7,5

C-5

121-0879

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS OFF.

1

179-9060

C

T ABBREV

FUSE "B" YELLOW

179-9080 179-9059

B LOC

U

D

L1

10

M318 IDENT PART-NO. A L68

ALL DASHED LINES ARE ATTACHMENTS.

13

D

BK

L55

D RD/YL(12) BU/YL(3) BK

POSITION LAMP 5W-2033

31

BK

B

L2

HEAD LAMP AS. 2U-4800

58

D

L68

FUSE "A" BLACK

14

56B 56A

L69

BK BK BK

L79

RD

C

L55

MOTOR

A

WH-14 BK-14

D

GY

B

BK/GN(2)

7

5

BK

E 10

9

+ -

L35

BK(6)

BK

PLUG 120-5967

L68

L69

TRAVEL ALARM CANCEL SW 8U-6357

GY(13)

BK TO FRAME

FORWARD HORN 153-6559

8

B

9

L68

L62

2 10

D

D

7

4

BK

RD(5)

GY

3

STICK TRAVEL LAMP AS. 8U-4742

BK-14

GY(8) BK

RD/YL(6) REAR FLOOD LAMP SW 5W-9372

BK

2

2

TO FRAME

9

TO FRAME

L70

7

8

6

8

4

GN(9) BU(10) BK

GY

L67

B PK(13)

1

PU(1) RD/YL(31) B 5 7 BK/GN(11) BK/WH(1) 1 BK/WH(4) TRANS SPEED 9 10 SWITCH 5W-9372

10

7

5

STEP DOOR SAFETY SW 152-1620 RESISTOR 122-2373

PU(7)

9

1

B

BK/GN/RD(7)

L67 B

GY GY

V

15

FLOOD LAMP AS. 120-6775

B

PU (7) OR(1) BK

GY

BK/YL(1)

9

5

B

1

8

6

10

GY(14)

9

10

1 WH(1) B

B

B 12V 24V GND

BK(1) FRONT FLOOD LAMP SW 5W-5867

BK

CAB RISER (DOWN)

OSC AXLE LOCK SW 133-8327

2

8

7 1

B

RD/YL(26)

V

L4

7

5

BK GY

L3

L4

CAB RISER SWITCH 133-8327

9

10

GY

YL (15) YL (16) YL (13)

BK/WH(3) GN(8)

7 2 4

5

9

10

B

BK

BK

GY

B

L67

04 03 02 01

7

10

B

B

9

5

WH(20)

BK

3 CAB RISER SWITCH 113-2531 (UP)

B

LOWER WIPER SW 5W-9744

1

B

B

BK GY

YL(13)

B

B

PU(2)

BK/GN(7)

GY

7

WH BK M

L70

BK/WH(5)

6

2

RD/YL(17)

GY

BK

L53

OVERLOAD WARNING DEVICE SWITCH 5W-9372

BK

E

GY GY

9

10

L55

BK

5

30

L58

GN(1)

CONVERTER 24V-12V 120-6566

L63

9

E

BU/WH(1)

RD/YL (7) RD/YL (5) BK (2) BK (3) BK (4) BK (5)

9

B

A/C SW 5W-9372

10

BK(11) GY(11)

8

GY GY

B

L59

PK(1)

7

3

10

9

HEAD LAMP SW 5w-5867

BK

50A

1

9

3

B

L80

4

2 10

B

B

YL(9)

E

E

RD/YL(30) RD(2)

2

8

6 E

3

BK

9

8 6 2 7 5 1

6

2

RD/YL(30)

GY(1)

RD/YL(3)

7

ONLY M320 POWER MODE SW 139-8289

15

L55

START AID SW 8U-6357

5

1 2

H

L70

BK/YL/WH(2)

L54

GY

L57

RD(21)

CONN 17 BK(1) BK D

L63

L25

L60

1

L80

L56

7

5

BK/GN(3) GN/BR(2)

L25

YL(9)

L64

L63

KEY SWITCH 117-9507

E

PU(8) BK

D

CONN 15

10

L65

L67

RD(7) BK

RD BK GY BU

B

GN(7) WH(12) BU(15)

G

04 03 02 01

AUX HYD (CW ROTATION)

STARTING/ PILOT PRESS ENABLE SWITCH 117-3187

BK/YL/WH(1) BU(18) L90 BU(3)

L48

CONN 13 L83

COMPRESSED AIR HORN 5W-9400

B GN/BR(2) GN(22) BK/GN/RD(9)

2 4 B

3

BK-14

AUX HYD SWITCH 113-2531 (CCW ROTATION)

WH(14) 87a

L46

L63

BU(3) RD(34) BK/GN(3) GN/BR(2)

L92

E

LOWER WINDSHIELD 137-7245

BK-14

30 L52

L78

BK GN(13)

-

BU(2)

L49

1 2 3 5

DIODE BRAKE 120-5969

L50

START/STOP 117-4861

PU(4)

L64

L46

02 06 01 05 03 04

BK/GN(10)

GN(10)

L56

PU(6) WH(12) OR(4) YL(17) BU(15) GN(7)

GN

HOUR METER 120-5966

B

L92

L85

H

B

L77

E

UPPER WINDSHIELD 122-2369

H 5

C BK/GN(7) BK/WH(3) BK/PU(2)

GY/BK(2) SWING BRAKE SWITCH 113-2531

LOWER WIPER 6C-9156

H BK GY/BK (1)

A

2

H MOTOR G

BU-10(2)

A GN(5) GN(3) BU(7) BU(4) RD(9) RD(1)

UPPER WIPER 122-2367

MOTOR G TO CAB

RD/YL(16) BK

DIODE TEMP 123-3998

POSITION LAMP 5W-2033

31

BK

CONN 14

F

CIGAR LIGHTER 5W-9628

ALARM CAB RISER 117-4861

87a

HEAD LAMP AS. 2U-4800

56B

GN/BU(3) 56A GN/WH(3) 58 GY(3)

H

H RD(11)

30 87a

C

BK-14

A

A

TO FRAME

PLUG 120-5967

BK

TURN SIGNAL LAMP AS. 116-9626

YL(2)

85

86 87

L49 L90

RD(11) GN(6) BU(10)

OR(11) YL(5) WH(17) GN(21) BR(7) BU(9) YL(12) PU(8) RD(21) BK GN(9) BU(10)

BK

RD(13) RD(6) 30 STOP LAMP CUTOFF 60s 174-8208

85

BK(8)

BK

PU(4)

L48

L12

DOME LIGHT 5W-2041

BK

31

BR(1)

F

BK

BK BK

BK/RD(2) GN(13)

BK(18) C

BK YL(14)

GN(28)

TRAVEL CUTOFF 117-4861

85

86 87

1

L90

30

L28

RD GY

H

L46 WH(2)

BU(20) GN/BU(1) BK/GN(5) BR(10) RD(6) BR (1)

L47

RD/YL (14)

30 SWING BRAKE 117-4861

SPEAKER 5W-8937

L75

FLOOD-LAMP 120-6776

85

BU(18) BU(3)

L77

OR(10) WH(9)

3 2 1

POWER MODE 117-4861

87a F

A

BR BR/RD

H

GN(16) 86 87

OR(12)

30

BU(9)

GROUND

85

86 87

85

BK

H BK BK/YL (1) ANTENNA 5W-9391

+BATT. SPEAKER SPEAKER SPEAKER SPEAKER

BK/WH(5)

BK BK

A

BK

ANTENNA ANTENNA

YL(4)

OR(13)

A

30 PILOT PRESS ENABLE 117-4861

L75

BR

BK/GN/RD(4)

WH(8) GN(29)

L48

K

L1

87a

BK

WH (14) OR(10) A 87a

RD/YL(15)

FLOOD LAMP 120-6776

BK/WH(6)

TRANS SPEED 117-4861

87a

L49 L45

CONN 8

TXD RXD GND (BB3) NC MODE TEMP. GOVERNOR CONTR-KL.3 MAGNET TRAVEL SPEED + MODE III LAMP + SW-TRAVEL SPEED CONTR BRAKE LIGHT MODE II MODE I GOVERNOR CONTR-KL.1 GOVERNOR CONTR-KL.2 MODE III SW-PRESS AEC SWITCH HLC + 24 VOLT + 24 VOLT NC NC NC NOMINAL VALUE GND 2 NOMINAL VALUE 2 ACTUAL VALUE OUTPUT SW-TRAVEL PEDAL NC GROUND GROUND NC SOLENOID HLC + NC ENGINE SPEED SENSOR ENGINE SPEED SENSOR NC SOL SWING CONTROL + NC SOLENOID VALVE-LS + NC

BK/GN/RD(4) WH(9)

L87

BU(10) BU (8)

30

WH(7)

85

H

REAR WORK LAMP AS. 120-6776

PU(7) GY RD

85

BK/GN/RD(2) BK/GN/RD(1) BK

86 87

2.5A

BK BK TO BOX

BK BK

RD(14) 86 87

L48

F

OR(5)

L46

PU(8) PU(9) BU(15) GN(7) RD(10) BU(8) WH(7)

07 12 10 11 06 01 02 05 08 09 04 03

4 5

L12

BU(3)

A

3

A

GROUND

A

2

BRAKE 117-4861

87a

GN(29) BK/GN(2) BU/YL(2)

BU(20)

GN/BR(2) GN/BR(7) BK/GN(3) BK/GN(15) RD(34) RD(35) BU(16) BU(18) GN(17)

1

HCR&AEC DIODE 147-0934

FLASHER 8U-9152

+ BATTERY

A

A

L47

OUT (LAMP)

C 31

BK

30 AEC AUX-HYD 117-4861

87a

1 2

L39

L86

OR(3) PU(3) WH(1) BK (4) BK (5) BK (2) BK (3) YL (1) BK (1) BR/WH(2) BR/BK(1) BR/WH(1) BR/BK(2) GN(2) GN(1)

PU(8) PU(9)

BK DIODE 106-8704

49a C2 49

GN/BR (1) BK

F

85

86 87

L39 L40

RD(7) BU/YL(4) RD(9) BU (7) GN(5) BU (5)

BK/GN(4) A

L43

L43

BK-10

BK WH(4)

L74

PK(7) PK(14)

L50

RD(2) GN/BR(1) BK/GN(1) BK/GN/RD (2) BK/GN/RD (1)

BK/GN(1)

A

BR/RD

H H

31

7,5A

4

BK

L12

GN(6)

30

BK

BU/WH(1)

53

15A

L71

RD(18)

BK

86

85

+BATTERY ALARM PRESS.SW SHUTDN.SW GROUND

31B 53A

A

RD-10(1)

7,5A

5

G

TURN LAMP GP L 116-9624 TURN LAMP 5W-2040

B

GY(3) GY(5) GY(4) GY(6)

1

7,5A

C

RD(16)

L51

BK

BK BK BK BK BK

1 2 3 4

BEACON 116-9627

SPEAKER 5W-8937

31

L40

2

7,5A

D

RD-10(2)

GY(1)

7,5A

6

A TO BOX

RD/YL(13) GN(6) BK/WH(2) BK(6)

F

53

L86

A

L72

GN/BU(4)

3

7,5A

15A

7

A

L32 RD(12)

BK 85

86 87

A

RADIO 165-5934

31B 53A

B

GY(2)

4

7,5A

E

RD-10(3)

15A

YL(2) RD/YL(16) RD/YL(3)

RD(15) RD-8(1)

BK/YL/WH(1)

C

5

7,5A

F

GN/WH (1) GN/WH (4) GN/BU(3)

CONTROL-ENG/PUMP M318 = 147-8479 M320 = 147-8481

TO CAB START AID SOLENOID 122-2377

D

GN/BU(2)

CONN 7

D

CC

D

WH(15)

BK-00

U

RD-6(3)

W D-

COOLANT TEMP SENDER 8U-1516

GN(5) ALTERNATOR 9W-3043

+ D+ D

U

COOLANT TEMP SWITCH 119-3399

RD-6(2)

RD-00

MOTOR

RD-6(2)

BU(5)

MTR BAT

FUSE ALTERNATOR 123-8838

BK

RD-4(1)

D

S

L39

7,5A

G

GN/WH (3)

6

8

0

G

E

7

7,5A

7,5A

L6

RD-4(4)

GN/WH(2)

WH(4)

12 11 09 10 01 02 03 04 05 06 07 08

G BU(15) GN(7) WH(7) PU(9) RD(10) BU(8) GN(6) RD(11) BU(10) PU(8)

F

H

RD-10(4)

RD-8(2)

FF

TRAVEL ALARM RELAY 122-2371

A

BK

GN BK

L37

RD/YL(2)

MAIN-POWER 157-0836 30 87

BK GN/WH(1) BK/GN(9) GN/BR(5) YL(12) BK WH(2)

1 2

D

L16

G L33

8

7,5A

RD-12 RD(31) GY(5) GY(6) RD/YL(13) BU-10(2) RD(10) RD/YL(16) RD/YL(14) RD/YL(15) RD(16) RD(18) RD(19) OR(12) RD/YL(3) RD(4) BK/GN(10) BK/PU(1) RD/YL(1) GY(2) RD/YL(5) RD/YL(6) RD/YL(7) RD/YL(8) RD(5) BK (7) RD(3) RD/YL(9) YL(2) GY(1) GN/WH(1) RD/YL(2) OR(1) RD/YL(11) RD(8) GY(4) GN/WH(4) GN/BU(4) RD/YL(12) BK/PU(2) GN/WH(3) GN/BU (3) GY(3) RD/YL(10)

RD-8(1)

RD/YL (16) BU-10 (2) RD (10)

1 2 3 4 5 6 7

1 2

ARC SUPPRESSOR 106-8704

RD(24) BR(6) WH(16)

GN(4) BU/YL(4) BR/WH(1) BU(5) GN(5) BR/BK(2)

L13

H

RD-14(1)

L38

YL(2) RD/YL(3) RD/YL(16) RD(16) OR(1) RD(3) BK (7) BU-10(2) RD (18) RD (19) RD/YL (2) GN/WH(1) GN/WH(3) GN/WH(4) GN/BU(3) GN/BU(4) GY (1) GY (2) GY (3) GY (4) GY (5) GY (6) RD (5) RD/YL(14) RD(10) RD/YL(1) RD/YL(5) RD/YL(6) OR(12) RD/YL(7) RD(31) BK/PU(1) BK/PU(2) BK/GN(10) RD(4) RD(8) RD/YL(8) RD/YL(9) RD/YL(10) RD/YL(11) RD/YL(12) RD/YL(13) RD-12 RD/YL(15)

FUSE BLOCK 148-0079 B YELLOW A

60A

L36

GND HIGH BEAM TURN SIGNAL TURN SIGNAL POWER MODE III + POWER MODE III PARKING BRAKE

GN-14 GN-14

L4

RD-8(3)

L51 WH(5) PK(12) BK/WH(2) YL(4) BK/YL/WH(1)

L51

OVERLOAD BRAKE LOW PRESS + 24 VOLT AIR FILTER HYD FILTER SUPPL STEERING SUPPL STEERING

RD(31)

30 87b

GG

L

L14

YL(13) YL(15) YL(16)

D

L

D

A/C CLUTCH RELAY 123-6527

86

A

FUSE BLOCK 148-0078 A BLACK A

L42

RD/YL (11) GN/BU(4) GN/WH(4) GY(4) RD(8) RD/YL(12)

RD-8(3) A

L37

MAIN FUSE 124-0016

FF

7 6 5 4 3 2 1

85 87

KL.30

YL(9) BU(1) RD/YL(9) BR/WH(2) BR/BK(1) PU(3) RD(4)

OR(8) YL(16)

A/C CLUTCH SOLENOID 3E-1906

L11

L16

GN(4)

L36 L36

L36

D

GN/BR(3) GN/BR(4) GN(4) BU/YL(3)

BLADE FRONT SOLENOID 8U-6424

BU(4) RD/YL(18) BU/YL(5) BK/GN(11) GN(3) YL(10) BK/WH(4)

V 1 2

V

LAMP LICENCE PLATE 116-9623

1 2

GN(4)

BU

BK

D CONN 3

GN

RD(26) WH(4) GY(6) BK GY(9)

V

G

BR BU

BU-10 (1) BK/GN(8)

HYD OIL HIGH TEMP 1 2 + 24 VOLT 3 POWER MODE II 4 TRANS SPEED II ENG COOL HIGH TEMP5 6 POWER MODE I 7 TRANS SPEED I

YL(15)

A YL(4) BK/YL/WH(1) BK/WH(2) WH(5) PK(12) GN/WH(2) GN/BU(2) GN(24) BK/PU(2) GN/WH(3) GN/BU(3) GY(3) RD/YL (10) BU(20) PK(7) BK/GN (4) BK/GN (5) RD(6) BR (1) BR(10) GN/BU(1) BK(8) WH(3) GN/BR(7) BK/GN (15) PU(2) PK(13) BR(11) BU(1) BR/WH(3) BK/GN/RD(3) WH(6) BK/WH(1) BK/YL/WH(2) BK/GN(7) BK/WH(3) GN/BR(4) GN/BR(3) BU/YL(3) GN(4)

L30

L30

RD(1)

BK-12 A/C PRESS SWITCH 114-5333

L93

BR/WH(3) BR/BK(2) OR(3)

V

L89

V

RIGHT FRONT STABILIZER LOCKOUT SOL 8U-6424

BB

BK/WH(5) BU/WH(1) BK (12) GY(7) BK/GN(10) GN(8) BK/PU(1) GY/BK (1) BK-14 YL(2) PU (7) BK/YL(1)

87b

AA

09 10 03 02 11 07 12 01 08 06 04 05

30

BK-12 BR-12

Z

YL(2) BK/PU(1) GY(7) BK/YL(1) BK/WH(5) BU/WH(1) GN(8) GY/BK(1) BK(12)

PK(11) PK(12)

2 1

GN(17) RD(35) BU(16)

BK/GN(10)

BR-12

BR BU BR BU

02 01 04 03

BR/WH(1) BU(2)

MOTOR

RD-12

GN/BR(4) BR (1)

NC FUEL LEVEL COOL TEMP HYD OIL TEMP

87

L17

L34

CONN 16

BK

85

02 01 04 03

BR DK-BU GN/YL BK

C

1 2 3 4 5 6 7

BK

DIODE 140-6617

BK TO PLATFORM

CONN 16

GND NC NC ENGINE OIL PRESS ALTERNATOR NC (+ 24 VOLT) HYD OIL LOW TEMP

T

YL(13) A/C FAN RELAY 86 123-6527

AIR HORN SW 5W-9376

7 6 5 4 3 2 1

AIR CONDITIONER FAN 145-7724

D BK DIODE 8U-8045

BK-12 TO FRAME

WH(15)

GN(27)

BK

STOP LAMP CUTOFF/ OSCILLATING AXLE BLOCKED SWITCH 174-8209

WH(17) GN(21) BR(7)

HYD OIL LOW-TEMP SWITCH 119-3400

L18

LEFT FRONT STABILIZER LOCKOUT SOL 8U-6424

GN/BR(1) BK(7) WH(3) BK/GN(1) BK(8) RD(1) BU(2) BR/WH(1) GN(3) RD/YL(2) BU(4) WH(2) GN/WH(1) YL(10) BU/YL(5) OR(3) BU(1) RD/YL(9) BR/WH(2) BR/BK(1) PU(3) RD(4) YL(9)

RD(9) BR/BK(1)

L83

L10

T PK(9) PK(10)

OR(4) PU(6) YL(17) WH(12)

54

L61

RD-00 L17

3 4

Z

GN(2) RD/YL(8) BK/GN/RD (1) BK/GN/RD (8) GN(10)

L19

2

TO FRAME

L33

A

GY(2) BK(1) RD/YL (6) BK(6) RD/YL(1) BK/GN/RD(3)

TO FRAME

BU(7) OR(3) C 1

L82

HYD OIL HIGH TEMP SW & SENDER 116-4710 D T

1

0 TO CAB BU(20) PU(19)

C

R

BU/WH(1) BK/YL (1)

BK BK-14 BK

BK BK

H 56A

BR(10) BR(11) PK(13) BR(1) GN/BR(4) PU(19) BU(20)

L77

D BR/BK(1) PK(8)

L24

WH(1) BK

BR/BK(2)

C 1

D BK

BK

GN/BR YL WH/BK BK/WH BK/GN BK/WH/GN WH BR

DD

53e 53c I

BU(9) PK(12)

PK(1)

HYD OIL FILTER CLOG SW 116-8514

53e 53c I

YL(18)

PK(13) BR(11)

HAMMER SOLENOID 8U-6424

L32

RD-6(4)

GN(28)

WH(7) BU(8) BU(10) GN(6) RD(10)

L20

L12

L52

BK

L32

RD(7) BU/YL (4) RD(9) BU (7) GN(5)

GN(24) PK(7)

GN(26)

L15

L18 L19

BK

C

GN(25)

C 1 4 2

L21

C

C BK

AEC SWING SW PRESS 163-2084

LOW TRANSMISSION CLUTCH PRESS SW 171-7570 WH(15)

TRANSMISSION SPEED SOLENOID 8U-6424

BR/WH(3)

E

L89

C PARKING BRAKE SOLENOID 8U-6424

PK(12) FUEL LEVEL SENDER 112-7178

4 2

L22

01 08 06 05 04 03 07 02

BK(18)

31 31b 15

BK

BK/GN/RD(2)

G RD (24) BK

AEC STICK-CYL SW PRESS 163-2084

L20

GN(24) PK(7) PK(12) BR/WH(3) BK/GN(5) BK/WH(1) YL-14(4)

C PU(19) BK

RD-00

31 31b 15

BK GY(7) GY(15) BU(21) WH(20)

BK/GN/RD(6)

GN/BU(1) PU(2)

71A 56B 56 L

C

WH(3) BK/GN(4) GN/WH(2)

SWING BRAKE TIMER RELAY 155-4574

RD(1) BU(4) GN(3) WH(2) YL(10) BU/YL(5) BK(6) PK(1) BU(2)

L82

PU(6) BK

BK BK

L27

BU/YL(2) PU(2) BK/WH(1) BK/GN/RD(2) BU(3) RD(34) BK/GN(2) BK/GN(3) GN/BR(2) GN/BR(2) BK/GN(3)

L21

L34

YL(10) BU/YL(5)

BK

L94

TERMINAL 5W-3624

L33

1 2 W

INTERVAL WIPER RELAY 155-4574

OR(2)

L24

Z

WH(7) BU(13) GN/BR(3) GN/BU(2) BK/YL/WH(2)

BR(10) BR(11) PK(13)

BU/YL(3)

YL(5)

C

L31

BK(4) BK(3) BK(2) BK(1)

4 3 2 1

BU(9)

CONN 5

L34

DK-BU BK

BU/YL(2)

WASHER LOWER 7T-8890

BR GN/YL BK DK-BU

BK GY

1 2

WH J

Y

LEFT REAR STABILIZER LOCKOUT SOL. 8U-6424

SWIVEL 121-2974

BK(11) GY(11)

BK BK MOTOR

RD(25) BK

C

BK G

HORN/TURN HIGH BEAM SW 111-1975

BK

RD/YL (10) RD(6) BU (1) RD(25)

L29

A7 A6 A5 A4 A3 A2 A1

PK(1)

L23

30 87a

BK BK BK

C

BK

BU(13) BU/YL(3)

PRIMARY STEERING FLOW SW 3E-6429

BU(1)

RD(18) RD(16) RD/YL (15) RD/YL (14)

WH J

WASHER UPPER 7T-8890

TO FRAME

85

86 87

1 2 CONN 6

MOTOR

LOW BRAKE PRESS SW 5W-9972

TRAVEL PEDAL SW 136-9421

BK WH

REVERSE STER LIGHT 164-8366

BK BK

C

BK

BK

BK/WH(2)

GN/YL

L30

TRAVEL LOCK MAGNET 116-1146

BK WH BU(13)

TO FRAME

GN(10)

L21

RD(6)

FORWARD/REVERSE TRAVEL ALARM SW (QNTY 2) 9D-7032

OR(7)

BK BK

RD/YL(10)

C L31

BK(12) GN(8)

BK-4

BK

CONN 12

L29

BU-10(1) BK/GN(8) BK (2) BK (3) BK (4) BK (5) BK-6 GY(5) GY(6) RD(12) RD-12 RD(31) RD-6(4) BK(9) WH(4)

BK/WH(7) BK(2) BK(3) BK(4) BK(5) BK

L68

L18

BR DK-BU GN/YL BK

01 02 03 04 05 06

BK(1) BK(2) BK(3) BK(4) GN/YL

L59

PU(3) RD(8) WH(15)

D A1 A2 A3 A4 A5 A6 A7

Y 04 03 02 01

BR BU BR BU

01 02

BK

BRAKE LIGHT SW 8U-2158

C

BK-6 BK

D

1 2 3

AA

TO UNDCRG

BK

W

L27

Y 04 03 02 01 CONN 12

BR BU

BK/GN(5)

T

GN(15)

BB RIGHT REAR STABILIZER LOCKOUT SOL. 8U-6424

BK/GN(2)

RD(8) WH(15) PU(3)

YL

BK

WH(20) GY(15) BU(21) YL(18) WH(6)

MOTOR YL

BK

BR

PK(7)

W

L89

BK G

BK/GN(4)

1 2

SECONDARY STER MOTOR 118-9168

BK

YL(1) WH(1)

BK BK

GN(14)

SWING PUMP PRV SOLENOID 143-2363 G

OSC AXLE LOCK SOLENOID 172-7029

4 2

1

H BLADE REAR SOLENOID 8U-6424

BK(8) WH(3) OR (1) RD/YL(9) RD/YL(8) RD(4) BK/GN(10) BK/PU(1) RD/YL(5) RD/YL(6) RD/YL(7) RD/YL(1) RD(5) BK(7) RD(3) RD/YL(3) YL(2) GY(1) GN/WH(1) RD/YL (2) GY(2) WH(20) GY(15) YL(18) BU(21) GY(7) RD(2) GN/BR(1) BK/GN (1) BK/GN/RD (2) BK/GN/RD (1) BU/YL(2) GN(29) BK/GN (2) PK(1) RD(1) BU (4) YL(10) GN(3) BU/YL(5) BK(6) WH(2) BU(2)

WH(15)

C PU(2) BK

AEC BOOM-CYL SW PRESS 163-2084

2

L34

BU/YL(2) PU(2) BK/WH(1) BK/GN/RD(2) BK/GN(2) WH(20) WH(6) BK/GN(7) BK/WH(3) BU(21) GY(15) YL(18) PK(1) PK(13) BR(11) BK/YL/WH(2) GY(2) BK (1) RD/YL (1) BK (6) RD/YL(6) BK/GN/RD(3) RD(5) YL(10) BU/YL(5) BR/WH(2) GN/WH(1) PU(3) RD(1) GN/BR(1) BK(7) WH(2) BK/GN(1) BK (8) OR(3) WH(3) BU(1) BR/BK(1) RD(4) BR/WH(1) GN(3) BU (2) RD/YL(2) RD/YL(9) BU(4) GY(7) BK/PU(1) BK/GN(10) YL(2) OR (1) GN(29) GN(2) RD/YL(8) BK/GN/RD(1)

W

OR(4) BK

BK

3 2

3

L31

WH(1) BK(1) BK(2) BK(3) BK(4) YL (1) BK(5) BR/WH(1) BR/BK (1) BR/WH(2) BR/BK (2) GN(1) GN(2) PU (3) OR(3) BU (1) BR/WH(3) BK/GN/RD(3) WH(6) BK/WH(1) BR(11) PK(13) BK/GN(7) BK/WH(3) BK/YL/WH(2) PU(2)

SECONDARY STER RELAY 3E-0075 W

SECONDARY STER RELAY 117-4861

AEC IMPLEMENT TRAVEL SWITCH C 1 117-0651

4

11 05 06 07 08 10 09 14 12 16 18 15 17 56 13 01 20 49 70 48 57 65 66 67 68 21 47 53 54 30 60 43 44 52 02 40 41 42 33 58 36 31 38 55 34 50 37 35 69 39 25 23 22 27 29 04 26 24 62 59 45 46 03 51 64 63 61 28 32 19

RD(8) RD(32)

X

RD-4

TO FRAME

F

5

L34

BR/BK(2) BR/WH(3) RD/YL (3) GN(1) RD/YL(5) BK (2) RD/YL(7) BK(3) BK(4) BK(5) GY(1) YL (1) WH(1) RD(2) RD(3)

C

GN/BU(1) BK

BU(13) PU(19) BK/YL/WH(2) BK/WH(3) L23 BK/GN(7) PK(13) BR(11) RD-12 L89 RD(31) WH(7) BK(2) L19 BK(3) BK(4) BK(5) GN/BR(3) GN/BR(4) BR(10) WH(3) BK/GN(4) GN/WH(2) BU/YL (3) GN/BU(2) L22 BR(1) BK (8) GN/BU(3) GN/WH(3) GY(3) BK/PU(2) BK/WH(2) RD/YL(10) RD(6) BU(1) BU(20) CONN 11 C A GN(17) L94 B RD(35) C BU(16) CONN 10 C GN/BR(3) 30 GN/BR(4) 10 BR(10) 21 WH(3) 31 BK/GN(4) 39 GN/WH(2) 12 BU/YL (3) 11 GN/BU(2) 27 BR(1) 36 BK(8) 25 GN/BU (3) 24 GN/WH(3) 23 GY(3) 05 BK/PU(2) 33 BK/WH(2) 40 RD/YL(10) 16 RD(6) 29 BU(1) 06 BU(20) 34 GN/BR(7) 02 BK/GN(15) 09 BK/GN/RD(3) 14 BK/YL/WH(1) 15 GN(24) 19 PK(7) 20 PK(12) 28 PU(2) 01 GN/BU(1) 26 BR/WH(3) 04 BK/GN(5) 08 BK/WH(1) 18 YL-14(4) 32 WH(6) 38 WH(5) 13 BK/YL/WH(2) 35 BK/WH(3) 37 BK/GN(7) 22 PK(13) 17 BR(11) 07 GN(4) 03 CONN 9 BK (2) 04 BK (3) 05 BK (4) 21 BK (5) 38 PU(3) 27 RD(8) 01 40 03 WH(1) 06 07 08 BU(7) 23 RD(9) 30 BR/BK(1) 32 OR(3) 33 34 GN(4) 02 BU/YL(4) 13 BR/WH(1) 24 BU(5) 25 GN(5) 26 BR/BK(2) 14 22 GN(1) 36 BR/WH(2) 37 GN(2) 35 31 39 RD(7) 29 BK(1) 28 RD/YL (11) 20 GN/BR(3) 19 GN/BR(4) 10 GN/BU(4) 09 GN/WH(4) 18 GY(4) 17 WH(4) 16 RD/YL (12) 15 BU/YL(3) 12 YL(1) 11 D

W

GN(17) L94 RD(35) BU(16) BK/GN(15) GN/BR(7) BK/GN/RD(3) BK/YL/WH(1)

BK/YL/WH(1) BK

HEAVY LIFT SOLENOID 8U-6424

6

L29

RD-8(2)

TO FRAME

C

BK-00

X

MAIN PUMP PRV SOLENOID 143-2363 G

CREEPER SPEED SOLENOID 172-7029

7

L30

L28

BU(3) RD(34) BK/GN(3) GN/BR(2)

BK BK RD(25)

W CONN 2

BK/GN/RD(3) BK

SWING BRAKE SOLENOID 172-7029

BK-6

BK(8) GN/BU(3) GN/WH(3) GY(3) BK/GN(7) BK/WH(3) BK/PU(2) BU(20) PU(19) WH(7) BU(13) GN/BR(3) PK(13) BK/YL/WH(2) WH(3) BR(11) GN/WH(2) BU/YL (3) BR(10) BK/GN(4) GN/BU(2) BR(1) GN/BR(4) BK/WH(2) RD/YL(10) RD(6) BU (1) RD(25)

BU(3) RD(34) BK/GN(3) GN/BR(2)

5 2 6 4 1 3 7 8 9 10 11 12

BU BK PU OR RD YL BR WH PK GN GR

SECONDARY STEERING CONTROL 132-6640

C

FF

TO FRAME STEER SW GROUND STEER SW GOV.SWITCH BATTERY + KEY SWITCH DUMP VALVE R TERM (W) SHUT D SOL MAGN SWITCH EMS UNUSED

BK BK/GN(15)

TRAVEL ACTIVATION SOLENOID 172-7029

DISCONNECT SWITCH 7N-0718 P

RD(12) GY(6) GY(5) WH(4) BK(9) BK/GN(8) BU-10(1) RD-6(4) BK-6 RD(25)

KL.15

AUX HYD & CAB RISER SOLENOID 8U-6424

C

BK GN/BR(7)

L26

NEG

BK BK

C

G

POS

R

12V BATTERY (QNTY 2) 3T-5760

TO BOX

C

IMPLEMENT ACTIVATION SOLENOID 172-7029

T

NEG

BK-00

A

BK

C

AUX HYD (CCW ROTATION) SOLENOID 8U-9137

W

BK-10

POS

C

AUX HYD (CW ROTATION) SOLENOID 8U-9137

MOTOR

BU-10(1)

CAB RISER (UP) SOLENOID 8U-9137

BK

L15

R

01 02 03 04

GY(9) BK RD(26) GY(6) WH(4)

RD-00 RD-00

A BK/GN(8) BK

CAB RISER (DOWN) SOLENOID 8U-9137

BASIC LAMP GP 116-9625

RD-6(4) N

FF

BK(9) WH(4)

GY(5) GY(9)

REFUELING PUMP 5W-8633

L26

BK

BK

TAIL LAMP 5W-2040

TRAVEL ALARM 3T-1815

8

L27

WH(3) BK(8)

RD(12) RD(26) BK BK

STOP LAMP 9X-4493

9

L28 RD(12) GY(6) GY(5) WH(4) BK(9) BK BK/GN(8) BU-10(1)

BK

01 02 03 04 05 06

L

H

10

BK

BK(9) BK BK

11

A CONN 1

BK(9) BK RD(12) GY(5) GY(6) WH(4)

RD-4

TURN LAMP 5W-2040

12

WH(6) WH(5) BK/YL/WH(2) BK/WH(3) BK/GN(7) PK(13) BR(11) PU(19)

L TURN LAMP GP 116-9624 L

13

THIS SCHEMATIC IS FOR THE M318/M320 EXCAVATOR (179-9031).

COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF. UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAUGE

1

F-7 C-8 D-7 E-7 E-7

E-1

A