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

Part No. 3E-1906

Resistor, Sender and Solenoid Specifications Component Description

Solenoid:

8C-3663

8U-6424

172-7029

112-7178

116-4710

122-2373

Solenoid:

Solenoid:

Solenoid:

Sender:

Sender:

Resistor:

Resistance (Ohms)¹

A/C Clutch Engine Start/Stop 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

19

OSC Axle Lock Creeper Speed Swing Brake Travel Activation Implement Activation

33.8/17 Watt

Fuel Level

Full = 0.4 Empty = 70.6

Hydraulic Oil High Temperature

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

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.

Related Electrical Service Manuals Alternator: 9W-3043

Form Number SENR3685

Starting Motor: 8C-4774 Consist: 8C-4773

SENR3559

Consist: 3E-1944

SENR3581

Consist: 106-8558

SENR3559

Electronic Control Systems

AEC - Aux. Hyd.

SENR6265

Component Location Machine Location

Component

Schematic Location

Machine Location

F-8

D

Solenoid - OSC Axle Lock

F - 14

8

Alternator

C - 13

2

Solenoid - Parking Brake

F - 14

11

Alternator Fuse

C - 15

5

Solenoid - Right Front Stabilizer Lockout

G-1

18

Battery 12v (2)

H - 13

3

Solenoid - Right Rear Stabilizer Lockout

H - 10

27

Cigar Lighter

F-2

A

Solenoid - Start

C-14

18

Converter 24v - 12v

D-3

A

Solenoid - Swing Brake

G - 15

16

Diode - A/C

E - 13

D

Solenoid - Swing Pump PRV

G - 14

16

Diode - AEC - Aux. Hyd.

F-8

D

Solenoid - Transmission Speed

F - 13

11

Diode - Brake

D-6

D

Solenoid - Travel Activation

G - 15

Diode - Harness AS

B-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

C-2

C

Switch - AEC Swing Pressure

E - 15

16

Flasher

F-7

C

Switch - Air Filter Clog

B - 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)

D-3

B

Fuse Block (C Green)

E - 10

D

Switch - Aux. Hyd. (cw rotation)

C-5

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 - Coolant Temp

D - 13

2

Motor - Heater Fan

B-8

10

Switch - Coolant Temp

C - 13

5

G - 13

11

Switch - Creeper Speed

C-6

C

Motor - Lower Wiper

E-1

12

Switch - Disconnect

H - 12

3

Motor- Refueling Pump

H - 13

9

Switch - Engine Oil Pressure

D - 13

8

Motor - Starter

C - 14

5

Switch - Forward/Reverse Travel Alarm (2)

H - 6, G - 6

21

Motor - Secondary Steering

H - 12

4

Switch - Front Flood Lamp

C-5

C

Motor - Upper Washer

G - 13

3

Switch - Hammer

B-8

C

Motor - Upper Wiper

E-2

A

Switch - Hazard

B-4

C

Radio

F-2

Switch - Head Lamp

D-5

C

Engine Speed Dial

Motor - Lower Washer

124-0329

Title

Component

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

Schematic Location

Regulator - A/C Temperature

B - 10

A 10

Switch - Heater Fan

B - 10

C

Relay - A/C Clutch

D - 13

D

Switch - Heavy Lift

C - 10

C

Relay - A/C Fan

E - 13

D

Switch - Horn/Turn/High Beam

G-3

A

Relay - Air Horn

E-7

D

Switch - Hyd. Oil Filter Clog

E - 14

24

Relay - Brake

F-6

D

Switch - Hyd. Oil Low Temperature

E - 14

23

Relay - Brake/Travel Cutoff

D-5

D

Switch - Hyd. Oil High Temperature

E - 14

23

Relay - Interval Wiper

G-6

D

Switch - Key (Start)

C-7

C

Relay - Main Power

F-7

D

Switch - Left Front Stabilizer Lockout

C-9

C

Relay - Pilot Press Enable

F-7

D

Switch - Left Rear Stabilizer Lockout

C-9

C

Relay - Power Mode

F-6

D

Switch - Low Brake Pressure

G-5

21

Relay - Start

C - 15

D

Switch - Low Transmission Clutch Pressure

F - 13

11

Relay - Start/Stop

E-7

D

Switch - Lower Windshield

E-2

A

Relay - Secondary Steering

G - 13

4

Switch - Lower Wiper

C-7

C

Relay - Secondary Steering

H - 13

D

Switch - OSC Axle Lock

C-5

C

Relay - Stop Lamp Cutoff

E-7

D

Switch - Overload Warning Device

A-5

C

Relay - Swing Brake Timer

G-5

D

Switch - Overload Warning Device

C-8

25

Relay - Temperature

E-6

D

Switch - Parking Brake

B-5

C

Relay - Transmission Speed

F-6

D

Switch - Pilot Control Lock

B-5

B

Relay - Travel Alarm

F-5

D

Switch - Power Mode M318 Only

D-6

C

Relay - Travel Cutoff

F-5

D

Switch - Power Mode M320 Only

D-6

C

Resistor - Backup Main Pump PRV

E - 10

D

Switch - Primary Steering Flow

G-4

21

Resistor - Backup Swing Pump PRV

C

E - 10

D

Switch - Rear Flood Lamp

C-5

Resistor - Heater Fan

B-8

10

Switch - Refueling Pump

F-5

D

Sender - Coolant Temperature

D - 12

2

Switch - Reverse Steer Proximity

B-5

26

Sender - Fuel Level

F - 14

13

Switch - Right Front Stabilizer Lockout

B-9

C

Sender - Hydraulic Oil High Temperature

E - 14

23

Switch - Right Rear Stabilizer Lockout

B-9

C

Sensor - Engine Speed

D - 15

14

Switch - Start Aid

C - 10

C

Solenoid - Aux. Hyd. (cw)

G - 15

16

Switch - Starting Pilot Pressure Enable

D-4

B

Solenoid - Aux. Hyd. (ccw)

G - 15

16

Switch - Stop Lamp Cutoff/OSC Blocked

G-2

A

Solenoid - A/C Clutch

D - 14

15

Switch - Swing Brake

E-3

B

Solenoid - Blade Front

G-1

27

Switch - Swing Brake

E-7

D

Solenoid - Blade Rear

H - 10

17

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

Solenoid- Main Pump PRV

G - 14

16

RENR4034 June 2000

7

5

2

14

6

15

18

20

26 19

23

22

25

24

19

18 16 C

11

28 D

3

4

12

13 1

8

10

A

21

27

17

9

29

B

M318 and M320 Excavators Electrical System M318: 8AL2265-UP 6ES243-UP

M320: 6WL469-UP

A 19

15

25 22

C

13 24 8 2

B

6 16 D

28 12

21

10

3 19

20

11 14

23 5

26

4

1 18 9

29

27

7

18

17

Machine Harness Connector and Component Locations

©2000 Caterpillar All Rights Reserved

Harness And Wire Electrical Schematic Symbols

Electrical Schematic Symbols And Definitions

Machine locations are repeated for components located close together.

Printed in U.S.A.

A = Located Inside Of Cab

A

B = Located Inside Of RH Console

AA

D = Located Around Relay Panel

Detected Faults

Connector Location

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

Connector Number

CONN 10

F - 11

6

CONN 11

C - 10

C

CONN 12

D - 10, 9, 8

6

CONN 13

H - 10

17

CONN 14

D-2

A

CONN 15

G-1

18

CONN 16

D-1

18

Error Message

Logged

Main Pump Circuit

No

Low Voltage

No

RPM Setting Diff

No

RPM Setting High

No

Off Machine Switch Specification 3E-6429 5W-9972 114-5333 116-4710 119-3399 119-3400

Primary Flow Low Brake Pressure A/C Pressure 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)

10132 kPa (1470 psi)

--

Low 275 kPa (39.9 psi) MAX

Low 170±55 kPa (24.6±7.9 psi)

High 2800±140 kPa (406±20.3 psi)

High 1750±200 kPa (254±29 psi)

94 ºC 201 ºF 100 ºC 212 ºF

---

Open Normally

Open Open Normally Open

17 ºC

Normally

52 ºF

63 ºF

Open

(377 psi) 507 kPa (74 psi)

--

--

• Governor actuator position signal too high.

• Open or shorted supply voltage circuit.

• Low idle stop passed.

• 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.

• Hydraulic pump outputs are reduced.

• 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.

Yes

• Engine overload.

• Engine stalls.

Yes

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

Yes

• Heavy lift does not operate correctly.

Mode SW Open

Yes

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

Mode SW Short

Yes

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

Heavy Lift Circuit

Level Symbol

Flow Symbol

2

• 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.

• Mode switch is faulty.

• Short to ground in harness wiring for mode switch.

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

Pin or Socket Number Wire, Cable, or Harness Assembly Identification

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

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.

T

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.

Normally

11 ºC

2600 kPa

• Governor actuator position signal too low.

• Open or shorted supply voltage circuit.

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

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

No

Open Normally

• Battery voltage below 17 DCV.

Swing Pump

RPM Dial Setting

Function

• 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.

No

No

Temperature Symbol

• Main pump PRV solenoid faulty.

• Open in harness wiring for main PRV solenoid.

• Harness wiring for main PRV solenoid shorted to ground.

RPM Setting Low

High Engine Speed

Part No.

• Main pump set to minimum output.

Possible Causes

• High idle speed too high.

• Engine stall speed too high or low.

Low Engine Speed

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.

Result Of Fault

Pressure Symbol

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

Receptacle

Plug

T

1 2

1 2

1

C = Located Inside Of LH Console

Normally Open Normally Open

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

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.

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

13

12

11

10

9

8

7

6

5

4

3

2

1

L28

L28

87 30

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

RD(31)

87b

GN BK

1 2

GN(4)

BK

GG

L1

GN-8 BK-8 BK

L76

L83

ENGINE OIL SW 3E-6455

ENGINE SPEED SENSOR 6V-2455

BK-18 RD-18 BU-18

RD-4(1)

D

70A

N

GN-8

L76

BR/WH(1)

D

D

T

W

D

BK BK

L8

2 1

BK

TO ENGINE L10

BK D

1 2

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

BK

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

D

G

T BK BR/BK(5)

BK

D

COOLANT TEMP SWITCH 127-5347

BK-4

BK-8 BK-00

RD-6(3)

D-

T

WH(15)

D

CC

U

ALTERNATOR 9W-3043 W

BK-00

U

COOLANT TEMP SENDER 8U-1516

GN(5)

+ D+

L13 L1

TO FRAME

L4

BK GN(2)

C

K BK-10

G

A B C D E

BR(2) WH(10)

L9

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

CONN 4 EE

G RD(22) BK(13)

BK

BK

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 --

BK BK

152-0197

BK-10

CONTROL-ENGINE 143-9581

G

1 2

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

L7 L1 L4

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

B

L10

L11

RD(23)

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

L STOP LAMP 9X-4493

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

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

RD(23)

K GOV ACTR D

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(22)

START AID SOLENOID 122-2377

D

GY(6)

WH(12) YL(17)

TO FRAME BASIC LAMP GP 116-9625

WH(4)

1

7,5A

A

RD-10(7)

4

7,5A

3

7,5A

2

20A

1

7,5A

L47

L86 F BU(15) GN(7) PU(9) PU(8)

L85 L44

L86

F RD(28) RD(29)

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

BACKUP RESISTOR MAIN PUMP PRV M318/M320

L81

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

L12 BK/GN(14) GN/BR(6) PU(9) L81 PU(8)

) )

BACKUP RESISTOR SWING PUMP PRV M318/M320

F

L87

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

30

BR(10)

15

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

87

A RD(12)

87a

A 86

A

L50 L52

L44 L46

87

86 87

L40

L45

3

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

RD(19)

OR(12)

1 2 3 5

DIODE BRAKE 120-5969

L50

BU(5)

BK

L49

BK GN(13)

L44

RD(14)

1

WH(14)

30 87a

BK-14

COMPRESSED AIR HORN 5W-9400

(CCW ROTATION) AUX HYD SW 113-2531

RD(7) BK

RD BK GY BU

GN/BR(2)

2 4 B

3

LOWER WINDSHIELD 137-7245

H BK-14

B

D

STARTING/ PILOT PRESS ENABLE SWITCH 117-3187

BK/YL/WH(1)

L46

L46 L48

BRAKE/ TRAVEL CUTOFF 85 117-4861

86 87

A

L52

L78

BK GN(13)

L44

BK/GN(10)

A BK

WH(8)

L48

L12

-

L48

AIR SUSPENDED DRIVER SEAT

L49

CONN 16

F L85

L59

L58

L57

L56

L53

L60

L61

L54

B

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

L46

ONLY M318 POWER MODE SW 5W-9372 5 BK

CONN 11 L83

E L65

L84

02 06 01 05 03 04

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

L66

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

BACKUP SW 133-8327

L66

5

1

HEAVY LIFT SW 5W-9372

RD(21)

5

E

1

LEFT REAR STABILIZER LOCKOUT SW 5W-9372

8

5 B 10

GY GY

GY

7 1

9

9

LEFT FRONT STABILIZER LOCKOUT SW 5W-9372 5

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

7

YL(9)

5

7

10

AEC SW 5W-9372

B E

7

5

BK YL(7)

7

BK

PU(8)

1

9

10

9

YL(8) BK

L3

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

GY

YL(7)

BK

A3 B3 B4 B5 C1 B1

10

BK

5

1

B 10

5

7

10

9

BK BK GY

GY

RIGHT REAR STABILIZER LOCKOUT SW 5W-9372 5

RIGHT FRONT STABILIZER LOCKOUT SW 5W-9372

1

L79

7

BK(3)

5

1 10

9

RD/YL(7)

1 B 10

5

10

2 1 3

GY(14) 10

9

2

L67

5

B 10

9

RD/YL(26)

BK GY(1)

BK

BK GY

9

BK GY

10 BK BR(11) OR(2)

L3 A/C TEMP REGULATOR 3E-5464 T 1 2

GY

L79

10

9

5

7

10

9

10 BK

L35

C

B

A

E A B C

MONITOR PANEL 175-7204

BK(8)

1 7

WH RD BK BR

3

1 2

BR

BK

ENGINE SPEED DIAL 141-6258

10

BK

C D

MOTOR

1 2 3

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

BR BK BU

+V SIGNAL GROUND

BK

BK YL(1)

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

TO FRAME

L79

M318

LOC

A

179-9078

C-5

L68

RD(7) BK (1) RD/YL(11) GN/BR(3) GN/BR(4) GN/BU(4) GN/WH(4) GY(4) WH(4) RD/YL(12) BU/YL(3) YL(1)

TO FRAME

FUSE "B" YELLOW

1 2

A

3

8

7

PARKING LIGHTS RHS PARKING LIGHTS LHS INSTRUMENT LIGHTING

7,5 7,5 7,5

1 2 3

ELECTRICAL FUEL LIFT PUMP WARNING LIGHT; START/STOP SOLENOID STARTER KEY SWITCH; MAIN POWER-RELAY; LIGHT

25

1

7,5

2

15

3

BACKUP

7,5

POWER MODE SELECTION; AEC; SWING BRAKE INDIVIDUAL STABILIZERS

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

1

STOP LIGHT

7,5

7,5

2

AIR CONDITION

20

7,5

3

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

7,5

AWG

MONITOR CIRCUIT. 00

70

PANEL LAMP CIRCUIT.

0

50

TURN SIGNAL AND WIPER/WASHER CIRCUIT.

4

16

6

10

8

6

4

LOW BEAM RHS

7,5

4

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

7,5

4

WORKING LIGHTS

15

4

BLUE LIGHT (REVERSE STEERING); TRAVEL ALARM

7,5

5

LOW BEAM LHS

7,5

5

START/STOP RELAY

7,5

5

HAMMER BLOW FREQUENCY ADJUST.; FLOW CONTROL

7,5

5

15

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

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

8

CONTROL LIGHTS; TURN SIGNAL

7,5

8

CIGARETTE LIGHTER; PLUG; DOME LIGHT

7,5

8

AIR SUSPENDED DRIVER SEAT; PRIORITY

7,5

6

SECONDARY STEERING

7,5

10

4

7

WINDSHIELD WIPER UPPER AND PUMP

7,5

12

2.5

8

WINDSHIELD WIPER LOWER AND PUMP

7,5

14

1.5

16

1

6

5

4

3

STARTING CIRCUIT.

MM*2

179-9057

179-9058

C-5

179-9069

179-9070

E-6

D

174-9110

C-6

E

179-9047

C-6

F

179-9049

C-6

G

179-9043

B-6

H

179-9082

C-1

J

180-8137

E-7

K

139-8284

B-6

L

140-1059

F-8

M

120-6919

C-1

N

121-0875

F-7

P

121-0876

E-7

R

121-0877

F-7

T

121-0879

F-7

122-2360

C-8

COLOR

V

145-9202

D-7

BLACK

W

132-7212

E-7

BR

BROWN

X

122-2364

E-7

BU

BLUE

Y

121-2972

138-4515

E-5

GN

GREEN

Z

121-2973

138-4514

E-1

GY

GRAY

OR

ABBREV

FUSE "D" RED

FUSE "C" GREEN

B C

U

L2

BK

FUSE "A" BLACK

9

PART-NO.

YL(12)

L1

M320

IDENT

D

L1

10

D

BK

L55

REVERSE STEER PROX. SW 151-1953

OVERLOAD WARNING DEVICE SWITCH 118-5501

POSITION LAMP 5W-2033

L69

BK BK BK

B

HARNESS AS DIODE 142-9472

HEAD LAMP AS. 2U-4800

GY(8)

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

11

31

BK

D

L68

L2

56B

GN/BU(4) 56A GN/WH(4) 58 GY(4)

L55

HEATER FAN 173-7421

RESISTOR 122-2373

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

GY

D

04 03 02 01

RD

GY

GY PILOT CONTROL LOCK SW 5W-9372

9

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)

6 8 2 3 5

BK/GN/RD(3)

B

BK

B

GY

1

PARKING BRAKE SW 133-8327

HAZARD SW 5W-9351

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

2 E

9

BK(6)

7

BK

8

6

BK

L67

B

BK/GN(2)

1

L69

D

GY

5

1

7

5 B

2

10

9

WH-14 BK-14

L35

TRAVEL ALARM CANCEL SW 8U-6357

GY(13)

8

4

GN(9) BU(10) BK

GY GY/BK(1)

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

4

9

BK

BK

L69

8

B

+ -

FORWARD HORN 153-6559

2 10

TRAVEL LOCK SWITCH 8U-6357

1

UPPER WIPER SW 180-2649

GY GY

7

3

5

WH(1) B

B

9

1

1

BK/YL(1)

8 1

BK

TO FRAME

D

7

BK/GN/RD(7)

UPPER WASHER SW 2U-6635

7

GY(12)

BK

PLUG 120-5967

L62

GY

3

BK

RD(5)

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

BK

BK-14

GY(8) BK

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

8

6

WH(6) YL(18)

HAMMER SWITCH 8U-7284

B PK(13)

7

5

1

B

STICK TRAVEL LAMP AS. 8U-4742

L68

GY

BU/WH(1)

D TO FRAME

L68

L70

9

BK

OSC AXLE LOCK SW 133-8327

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

9

BK BK

CREEPER SPEED SW 5W-9372

9

BK

BK/WH(3) GN(8)

7 2 4

5

7 B

10

9

GY

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

10

LOWER WIPER SW 5W-9744

BK/GN(7)

B

9

GY

B

L67

B

RD BK GY BU

WH(20) HEATER FAN SW 111-3805

BK TO FRAME

B

PU(2)

1

B 10

BK

YL(13)

B

3 (CW ROTATION) AUX HYD SW 113-2531

BK/WH(5)

6

2

RD/YL (17)

BK

L53

OVERLOAD WARNING DEVICE SWITCH 5W-9372

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

1

B GY

B

A/C SW 5W-9372

GY

9 GY

L55

BK

1

10

GY BK

BK/GN(3)

GY

5

30

L58

GN(1)

PU(7)

L63

9

E

B

7

3

10

BK

B

HEAD LAMP SW 5w-5867 10

50A

4

9

E B

BK

3

B

L80

1

9

RD (3) RD(2)

2

10

9

3

B

6

2

RD/YL (30)

YL(9)

RD/YL (3)

7

7

8 6 2 7 5 1

GY(1)

2

10

L59

START AID SW 8U-6357

8

6 E

L55

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

B

PU(7) OR(1) BK

L70

BK/YL/WH(2)

L54

GY

L57

7

ONLY M320 POWER MODE SW 139-8289

15

RD/YL(30)

L56

PU(8) BK

10 KEY SWITCH 117-9507

L80

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

E

L65

L67

L60

1

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

G

12V 24V GND

YL(9)

L64

L63

L62

L63 CONVERTER 24V-12V 120-6566

L80

L1

12

FLOOD LAMP AS. 120-6775

L64

V

13

WH BK M

H

CONN 14 B GN(10)

L4

14

1 2

BK(1) BK D

B

L4

15

E

H GN YL

+

PU(4)

RD(13)

L50

START/STOP 117-4861

87a

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

UPPER WINDSHIELD 122-2369

B GN(29) GN/BR (2)

BU(2)

5

BK

SWING BRAKE SWITCH 113-2531 L64

LOWER WIPER 6C-9156

H BK GY/BK(1)

HOUR METER 120-5966

A

A CONN 12

BK(12) GY(7)

L77

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

2

85

30

BU/YL(4)

L48 L41

+ -

GY/BK(2)

DIODE TEMP 123-3998

85

H MOTOR G

PLUG 120-5967

A

L49 L45

UPPER WIPER 122-2367

G

TO CAB

31

BR(1)

L50

L47

F

TEMP. 117-4861

87a

MOTOR

RD/YL(16) BK

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)

H RD(11)

1

L46

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

CONN 7 07 12 10 11 06 01 02 05 08 09 04 03

BK

BK BK

RD(7)

CONN 9 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)

BK-14

L46

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

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

L39

V

L1

3 2 1

A

L39

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

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

OR(10) WH(9)

PU(4) 85

86 87

POSITION LAMP 5W-2033

BU-10 (2)

A

L40

A

87a

L43

BK-10

BK WH(4)

L38

A 30 SWING BRAKE 117-4861

GN/BU(1)

5 4

L43

L43

G

TURN LAMP GP L 116-9624

L74

RD/YL (14) BU(9)

31

BK

BU-10 (1)

85

CIGAR LIGHTER 5W-9628

HEAD LAMP AS. 2U-4800

31

5

15A

86 87

YL(14) BK

A

56B

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

H

REFUELING PUMP SWITCH 8U-3011

BK BK

DIODE STOP LAMP 123-5635

TO FRAME C

31

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)

BK

53

B

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

6

7,5A

POWER MODE 117-4861

GN(29)

PK(7)

BK

OR(12)

30

WH(8)

L38

K

TURN LAMP 5W-2040

A

RD-10(5)

C

RD/YL (5)

2

7,5A

D

RD/YL (6)

3

7,5A

E

L73

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

7

7,5A

TURN SIGNAL LAMP AS. 116-9626

YL(2)

87a F

F

BK(8)

31B 53A

B

4

15A

F

7,5A

30 PILOT PRESS ENABLE 117-4861

87a

DOME LIGHT 5W-2041

85

86 87

RD/YL(15)

GN(28)

TRAVEL CUTOFF 117-4861

L77

BK YL(14)

53

C

5

7,5A

G

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

6

7,5A

RD-10(8)

RD/YL(1)

L73

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

OR(13)

A

30

BK(18)

H

FLOOD-LAMP 120-6776

85

86 87

L28

RD RD

C

31B 53A

E

RD(5)

7

15A

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

TO CAB AIR FILTER CLOG SW 5W-9934

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

L84

BK

COOLANT TEMP SWITCH 119-3399

RD-6 (2)

RD-00

STARTER 8C-4774

MOTOR

RD-6(2)

BU(5)

MTR BAT

FUSE ALTERNATOR 123-8838

BK

RD-4(1)

D

D CONN 8

D 1 2 3

RD-4(4) S

RD(7) BK (1) RD/YL(11) GN/BR(3) GN/BR(4) GN/BU(4) GN/WH(4) GY(4) WH(4) RD/YL(12) BU/YL(3) YL(1)

L16

ENGINE START/STOP SOLENOID 8C-3663

GN BK

GN(1) BR/WH(2) GN(2)

L13

L4

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

D GN BK

WH(16) BR(6)

G

F L42

7,5A

8

1 2 3 5

DIODE AEC AUX-HYD 120-5969

BK/WH(5) H

GN(16)

WH(14) OR(10) A 87a

85

86 87

L75

YL(4)

BK

A/C CLUTCH RELAY 123-6527

86

G

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

G

H

A

BR

BK/GN/RD(4)

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

A BU(20)

PU(8) PU(9) GN/BR(6) BK/GN(14)

L87

L47

30 87a

SPEAKER 5W-8937

BK/WH(6)

TRANS SPEED 117-4861

F

GROUND

BU(10) BU(8)

30 87a

BR BR/RD

BK TO BOX

85

WH(7)

GROUND

SPEAKER SPEAKER SPEAKER SPEAKER

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

1 2

1 2

RD-10(6)

8

AEC AUX-HYD 117-4861

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

BK

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

1 2 3 4 5 6 7

1 2

ARC SUPPRESSOR 106-8704

BK BK

H

FUSE BLOCK 1480081 D RED A

BK

BK RD(14) 86 87

L48

BK

ANTENNA ANTENNA

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

85

GG

GY(10) BK

FUSE BLOCK 148-0080 C GREEN A

85

86 87 BK

+ BATTERY

BK

L75

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

OR(8) YL(16)

GN(4)

D

GN-14 GN-14

L

1 2

L72

C 31

FLASHER 8U-9152

BK

FLOOD LAMP 120-6776

7 6 5 4 3 2 1

V

A/C CLUTCH SOLENOID 3E-1906

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

L16

CONN 3

V

L11

D

1

25A

BK

OUT (LAMP)

H

REAR WORK LAMP AS. 120-6776

+BATT.

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

V

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

49a C2 49

2.5A PU(7) RD RD

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

YL (15) GN(4)

1 2

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

2

7,5A

BK/GN(1) BK/GN(4) GN/BR(1)

A

BR/RD

H H

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

L89

V

RD(3)

L50

BU/WH(1)

RD(1)

87b

V

L

L14

RD-12

30

BK-12 BR-12

BU (7) RD(9) BR/BK(1) OR(3)

L17

OR(1)

3

15A

L12

+BATTERY ALARM PRESS.SW SHUTDN.SW GROUND

BRAKE 117-4861

87a

BR BU

BEACON 116-9627

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

85 87

BU

LAMP LICENCE PLATE 116-9623

L41

L42

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

A

RD-10(1)

7,5A

L71

RD(18)

4

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

D

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

04 05 21 38 27 01 40 03 06 07 08 23 30 32 33 34 02 13 24 25 26 14 22 36 37 35 31 39 29 28 20 19 10 09 18 17 16 15 12 11

B

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

1

7,5A

C

5

7,5A

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

G

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)

2 1

BK-12 A/C PRESS SWITCH 114-5333

BK

L40

A

GY(2)

RD-10(2)

GY(1)

2

7,5A

L72

GN/BU(4)

3

7,5A

D

BK

BK

GN(6)

30

RIGHT FRONT STABILIZER LOCKOUT SOL 8U-6424

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

PK(11) PK(12)

L86

7,5A

E

RD-10(3)

TO BOX

BK

86

85

BK BK BK BK BK

1 2 3 4

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

DIODE 8U-8045

BK

DIODE 140-6617

BR-12

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

D

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

MOTOR

GN

L15

L18

WH(15)

4 2

BK-12 TO FRAME

AIR CONDITIONER FAN 145-7724

D

C 1

L83

WH(1) BK

T

B

4

RD(16)

RD(12)

L51

BK

RD/YL(13) BK/GN(8) BK/WH(2) BK(6)

F

BK/GN(10)

HYD OIL LOW-TEMP SWITCH 119-3400 BK

AEC SWING SW PRESS 163-2084

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

RD(9) BR/BK(1)

GN(27)

C

5

7,5A

6

15A

A

AA

SPEAKER 5W-8937

BR/WH(1) BU(2)

RD-00 L17

T PK(9) PK(10)

BK (2) BK (3) BK (4) BK (5) PU(3) RD(8)

L19

L10

E

C 1 4 2

TO FRAME

BU(7) OR(3)

GN/BU(2)

L82

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

GN(26)

AEC STICK-CYL SW PRESS 163-2084

BK BK-14 BK

BK BK

L39

D

F

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

7

15A

L32

BK 85

86 87

A

RADIO 165-5934

NC FUEL LEVEL COOL TEMP HYD OIL TEMP

D BR/BK(1) PK(8)

L24

WH(1) BK

BR/BK(2)

C 1

D BK

E

6

7,5A

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

RD(15) RD-8(1)

A

TRAVEL ALARM RELAY 122-2371

A

BK

HYD OIL FILTER CLOG SW 116-8514

F

GN/WH(2)

G

GN/WH(3)

8

7,5A

RD-8(2)

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

1 2 3 4 5 6 7

HAMMER SOLENOID 8U-6424

GN(25)

L37

7

7,5A

H

RD-10(4)

FF

Z

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

L20

L33

RD/YL (2)

L36

RD-8(1) MAIN-POWER 157-0836 30 87

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)

GN/BR(4) BR(1)

BR BU BR BU

C

7 6 5 4 3 2 1

BK

G

8

7,5A

L51

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

GN(24) PK(7)

H

RD-14(1)

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)

02 01 04 03

BLADE FRONT SOLENOID 8U-6424

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

L51

60A

L34

02 01 04 03

BK/GN/RD(9)

C

RD-8(3)

CONN 15 BR DK-BU GN/YL BK

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)

BK

GN(24) PK(7) PK(12) PU(2) GN/BU(1) BR/WH(3) BK/GN (5) BK/WH(1) YL-14(4) WH(6) WH(5) BK/YL/WH(2) BK/WH(3) BK/GN(7) PK(13) BR(11) GN(4)

A

FUSE BLOCK 148-0079 B YELLOW A

STOP LAMP CUTOFF/ OSCILLATING AXLE BLOCKED SWITCH 174-8209 AIR HORN SW 5W-9376

L61

BK

4 2

L21

C

C

BR/WH(3)

AEC BOOM-CYL SW PRESS 163-2084

LOW TRANSMISSION CLUTCH PRESS SW 171-7570

RD-8(3)

FUSE BLOCK 148-0078 A BLACK A

L38

MAIN FUSE 124-0016

FF A

L37

54

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

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

TRANSMISSION SPEED SOLENOID 8U-6424

WH(15)

PARKING BRAKE SOLENOID 8U-6424

PK(12) FUEL LEVEL SENDER 112-7178

3 2

L18

C

F

AEC IMPLEMENT TRAVEL SWITCH C 1 117-0651

L89

L30

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

RD (24) BK

L22

L30

L70

G HEAVY LIFT SOLENOID 8U-6424

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

KL.30

LEFT FRONT STABILIZER LOCKOUT SOL 8U-6424

Z

L36 L36

L36

TO FRAME

C

R

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

OSC AXLE LOCK SOLENOID 172-7029

L19

GN/BU(1) PU(2)

C PU(2) BK

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(2) BK/GN (3) 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)

30 10 21 31 39 12 11 27 36 25 24 23 05 33 40 16 29 06 34 02 09 14 15 19 20 28 01 26 04 08 18 32 38 13 35 37 22 17 07 03

3 4

CONN 15

L77

C GN/BR(3) GN/BR(4) BR(10) WH(3) BK/GN(4) GN/WH(2) BU/YL(3) GN/BU(2) 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) GN/BR(2) BK/GN(3) BK/GN/RD(3) BK/YL/WH(1)

BU(9) PK(12)

L33

CONN 10 A

2

TO CAB BU(20) PU(19)

53e 53c I

L78

L21

TO FRAME

CREEPER SPEED SOLENOID 172-7029

L32

RD-6(4)

L82

PU(6) BK

L33

GN(28)

53e 53c I

YL(18)

31 31b 15

BK

PK(13) BR(11)

BK

C

31 31b 15

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

L12

L24

SWING PUMP PRV SOLENOID 143-2363 G

GN/BU(1) BK

CONN 5

1

BK TO PLATFORM

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

WASHER LOWER 7T-8890

BK

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

H 56A

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

L52

BK BK BK

WH J

BK

C

1 2

MOTOR

L34 L32

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

87a

BK(18)

SWING BRAKE TIMER RELAY 155-4574

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

BK BK

30

SECONDARY STER RELAY 117-4861

SWING BRAKE SOLENOID 172-7029

L23

L59

BK/YL/WH (1) BK

C

INTERVAL WIPER RELAY 155-4574

TERMINAL 5W-3624

BK/GN/RD(5)

OR(4) BK

CONN 6

01 08 06 05 04 03 07 02

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

W

71A 56B 56 L

C

DD 0

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

BU/YL(3)

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

C

TRAVEL ACTIVATION SOLENOID 172-7029

WH J

WASHER UPPER 7T-8890

TO FRAME

85

86 87

1 2

Z

BK BK

L27

BK/GN/RD(6)

MAIN PUMP PRV SOLENOID 143-2363 G

G

MOTOR

L34

L31

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

4 3 2 1

1 2

C

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

BK

L22

DK-BU BK

YL(10) BU/YL(5)

BK BK

BR GN/YL BK DK-BU

OR(2)

L21

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)

SWIVEL 121-2974

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

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 46 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 03 51 64 63 61 28 32 19

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

BK/GN/RD(3) BK

BK-4

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

C

C

IMPLEMENT ACTIVATION SOLENOID 172-7029

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

C

Y

LEFT REAR STABILIZER LOCKOUT SOL. 8U-6424

L30

L29

A7 A6 A5 A4 A3 A2 A1

YL(5)

W

RD(25) BK

BU(1)

BK G

HORN/TURN HIGH BEAM SW 111-1975

BK

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

BU(13) BU/YL(3)

PRIMARY STEERING FLOW SW 3E-6429

C GN/YL

BU(9)

L18

BK BK

LOW BRAKE PRESS SW 5W-9972

BK

CONN 13

L29

BU/YL(2)

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

BK GY

D

1 2 3

BK/WH(2)

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

CONN 2

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

RD (6)

TRAVEL PEDAL SW 136-9421

BK WH

REVERSE STER LIGHT 164-8366

TO FRAME

GN(10)

W

RD/YL(10)

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

BK (12) GN(8)

SECONDARY STEERING CONTROL 132-6640

L19

W

BR DK-BU GN/YL BK

L31

BK

GN(15)

GN(14)

04 03 02 01

BR BU BR BU

BK

C

OR(5)

YL

Y

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

BK/GN(5)

1 2

CONN 13 AA

01 02 03 04 05 06

BK/GN(2)

BK BK

L89

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

L62

WH(15)

L89

D A1 A2 A3 A4 A5 A6 A7

H

TRAVEL LOCK MAGNET 116-1146

BK WH BU(13)

BRAKE LIGHT SW 8U-2158

C

L63

W

W

AUX HYD (CW ROTATION) SOLENOID 8U-9137

SECONDARY STER MOTOR 118-9168 MOTOR YL T

SECONDARY STER RELAY 3E-0075 W

L27

TO UNDCRG

L64

RD(8) RD(32)

X

RD-4

Y 04 03 02 01

BR BU

L68

L23 X

01 02

BK

BR

BB RIGHT REAR STABILIZER LOCKOUT SOL. 8U-6424

L54

BU(13) PU(19) BK/YL/WH(2) BK/WH(3) BK/GN(7) PK(13) BR(11) RD-12 RD(31) WH(7) BK (2) 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) 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)

BK G

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

BK BK RD(25)

BK BK

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) BU/YL(2) PU(2) BK/WH(1) BK/GN/RD(2) BK/GN(2) BK/GN(3) WH(20) WH(6) BK/GN(7) BK/WH(3) BU(21) GY(15) YL(18) 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/BR(2) GN(2) RD/YL(8) BK/GN/RD(1)

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

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

BU BK PU OR RD YL BR WH PK GN GR

BK

L60

BK-00

BK-6 BK

BK-6 BK BK

L34

L31 BLADE REAR SOLENOID 8U-6424

L61

FF

PK(7)

P

12V BATTERY (QNTY 2) 3T-5760

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

A

AUX HYD (CCW ROTATION) SOLENOID 8U-9137

DISCONNECT SWITCH 7N-0718

L34

BK/GN(4)

TO BOX

BK/GN(8) BK

BASIC LAMP GP 116-9625

NEG

L29 L30

L28

YL(1) WH(1)

POS

BK

GY(5) GY(9)

L15

NEG

A

TRAVEL ALARM 3T-1815

TAIL LAMP 5W-2040

POS

T

L26

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)

GN/YL

L26

W

BK-10

R

RD-8(2)

RD(12) RD(26) BK BK

MOTOR

BK-00

KL.15

L STOP LAMP 9X-4493

R

RD-00 BU-10(1)

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

RD-00

BK(9) WH(4)

H

RD-6(4) N

FF

BK

BK(9) BK BK

REFUELING PUMP 5W-8633

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

BK

TURN LAMP 5W-2040

01 02 03 04 05 06

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

RD-4

TURN LAMP GP 116-9624 L

L27

WH(3) BK(8)

CONN 1 L A

AA

122-2365

E-1

ORANGE

BB

122-2366

E-5

PK

PINK

CC

122-2382

C-8

PU

PURPLE

DD

8X-9618

E-1

RD

RED

EE

123-6475

C-7

WH

WHITE

FF

126-6801

F-7

YL

YELLOW

GG

145-9203

C-7

HEATER AND AIR CONDITIONER CIRCUIT. GROUND CIRCUIT. ENGINE CONTROL CIRCUIT. WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS ON AND THE LEFT HAND HYDRAULIC CONSOLE IS LATCHED IN THE DOWN POSITION.

THIS SCHEMATIC IS FOR THE M318/M320 EXCAVATOR (179-9029) COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.

START AID CIRCUIT. UNLESS OTHERWISE SPECIFIED:

ALL DASHED LINES ARE ATTACHMENTS.

2

ALL WIRE IS 16 GAUGE

1

B

A