317B & 318B EXCAVATOR ELECTRICAL SCHEMATIC (GRENOBLE) USED IN SERVICE MANUAL RENR1950,3260

©
1999 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR3271
SEPTEMBER 1999
317B & 318B Excavator
Electrical System
9WW1-UP
6DZ1-UP
AEJ1-UP
ADC1-UP
Component Location Chart
Component
Schematic
Location
Machine
Location
Component
Machine
Location
Schematic
Location
Actuator - Eng Govenor D-9 D Relay - Timer J-7 D
Air Heater B-9 3 Resistor - Backup J-9 D
Alarm - Travel D-9 3 Seat With Seat Heater F-5 28
Alternator C-8 4 Sender - Coolant Temp C-8 22
Antenna A-6 5 Sender - Hydraulic Oii Temp B-7 E
Battery E-9, F-9 6 Sensor - AIH Coolant Temp C-8 21
Block - Terminal G-8 D Sensor - AIC Photo F-2 A
Breaker 1 G-9 D Sensor - Fuel Level A-2 23
Breaker 1 - Bat G-9 D Sensor - Pump Discharge Press A-7 24
Breaker 2 H-9 D Solenoid - Air Conditioner Clutch B-8 26
Breaker 3 H-9 D Solenoid - ATCH Medium Press B-7 23
Control - Eng/Pump B-4,C-4 7 Solenoid - Engine Shutdown A-9 27
Control - Wiper E-2 A Solenoid - Eng/Pump Cont A-7 F
Converter J-3 8 Solenoid - Hydraulic Lock H-2 G
Converter-12V 7A B-5 9 Solenoid - Level Finish A-7 F
Engine Speed Pickup B-8 25 Solenoid - Swing brake A-2 32
Fuse - Block J-4, 5, 6 C Solenoid - Travel Speed A-7 F
Glow Plug A-9, B-9 2 Solenoid - Trenching A-7 F
Group - A TCH Conditioner H-6 18 Speaker A-5, B-5 33
Group - Heater H-6 18 Switch - Air Cleaner D-9 35
Horn C-2 10 Switch - ATCH Aux D-4 B
Indicator - Hydraulic oil Filter B-7 E Switch - A TCH Hammer Press G-2 G
Lamp - ATCH Cab G-1 12 Switch - ATCH Overload Warning D-5 B
Lamp-Boom C-1 11 Switch - ATCH Radio D-4 B
Lamp - Chassis B-2 13 Switch - A TCH Refridgerant Low Press B-9 26
Lamp - Dome A-6 A Switch - ATCH Refueling Start B-2 29
Lighter - Cigar F-2 A Switch - ATCH Refueling Stop B-3 30
Meter - Service F-2 A Switch - A TCH Rotating Beacon D-4 B
Monitor F-2 A Switch - A TCH Seat Heater D-5 B
Motor - Lower Wiper G-2 G Switch - Backup EPR Valve D-4 C
Motor - Starter A-8 14 Switch - Backup Gov D-5 C
Motor - Upper Wiper G-1 A Switch - Boom Raise Press C-7 34
Motor-Washer F-9 1 Switch - Coolant Level E-9 36
Multiposition Joystick LH H-2 C Switch - Disconnect G-9 D
Multiposition Joystick RH F-3 B Switch - Engine Oil Level A-9 37
Pump - ATCH Refueling B-2 17 Switch - Engine Oil Pressure B-8 38
Pump - Auto Lubrication E-9 16 Switch - Horn H-2 C
Radio A-5 C Switch - Hydraulic Oil Level B-7 E
Relay - Air Heater G-7 D Switch - Implement Swing Press C-7 39
Relay - Aux Hydraulic J-9 D Switch - Key E-3 B
Relay - Boom Lamp J-9 D Switch - Neutral Start Limit H-2 C
Relay - Chassis/Cab Lamp J-9 D Switch - Panel F-3 B
Relay - Heater H-7, J-7 D Switch - Refueling Level A-2 41
Relay - Horn J-9 D Switch - Throttle Position E-3 C
Relay - Hydraulic Lock Solenoid J-9 D Switch - Travel Press C-7 31
Relay - Main H-7 D Switch - Windshield E-2 A
Relay - Neutral Start J-7 D Timer - Engine Shutdown H-7 D
Relay - Refueling 1 B-2 19 Unit - Air Conditioner H-5 A
Relay - Refueling 2 B-2 20 Unit - Air Heater Control J-7 D
Relay - Start H-7 D Unit - Heater Control J-8 D
Relay - Start Cont J-8 D
Machine locations are repeated for components located close together.
A - Located in the cab
B - Located in the iefthand console
C - Located in the righthand consoie.
D - Located on or near relay panel.
E - Located near hydraulic oil tank
F - Located near pilot manifold
G - Located on or near bottom platform
Code Description of Problems
1301 Engine oil pressure is too low.
1302 Engine coolant temperature is too high.
1303 Hydraulic oil temperature is too high.
1304 Air filter is clogged.
1305 Battery voltage is not normal.
2201 Governor actuator feedback sensor circuit is open or shorted to battery voltage.
2202 Governor actuator feedback sensor circuit is shorted to body ground.
2301 Governor actuator feedback signal is not stable.
2302 Governor actuator feedback signal deviates.
2303 Governor actuator does not move.
2304 Calibration data error.
3201 Monitor RAM is not normal.
4101 Electric power supply to the controller is too much (43 volts).
4102 Over-current in proportional reducing valve.
4103 Proportional reducing valve circuit is open.
4104 Monitor power supply (digital output) over current.
4105 Over-current in digital output (trenching solenoid).
4106 Over-current in digital output (fine control solenoid).
4107 Over-current in digital output (travel speed change solenoid).
4108 Over-current in digital output (travel alarm).
4109 Spare solenoid 1 (digital output) over current.
410A Over-current in digital output (swing brake solenoid).
410b Spare solenoid 2 (digital output) over current.
4201 Engine speed is not normal.
4202 Engine coolant temperature sensor is shorted to body ground.
4203 Hydraulic oil temperature sensor is shorted to body ground.
4204 PWM sensor of pump delivery pressure is shorted to body ground.
4205 Spare PWM sensor 1 is shorted to body ground.
4206 Spare PWM sensor 2 is shorted to body ground.
4207 PWM sensor of pump delivery pressure is open in circuit.
420A Fuel sensor is shorted to body ground
420B Fuel sensor is open or shorted to battery voltage.
420C Electric power supply is to low (below 23 volts).
420D Electric power supply is to high (above 32 volts).
420E Engine speed dial is not in one of the 10 specified positions.
4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal).
4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal).
4303 Engine stalls.
A201 Monitor communication is not normal.
A202 Monitor takes too much time to respond to controller's signal.
A203 Communication is abnormal in controller.
Real Time Error Codes
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
102-8015 Backup 41.00± 2.05
41-5394 Sender: Hydraulic Oil Temperature 6130 to 7500
121-1490 Solenoid: Level Finish 32.0 ± 3.2
Trenching
121-1491 Solenoid: Travel Speed 32.0 ± 3.2
Hydraulic Lock
Brake
111-9916 Solenoid : Engine Pump Control 11.7± 1.2
¹ At room temperature unless otherwise noted.
Resister:
Swing
Off Machine Switch Specification
Part No. Function
A
ctuat
e
Deactuate Contact Position
106-0179 Implement Pressure 1520± 98 kPa 1127 kPa MIN Normally
Travel Pressure (220 ± 14 psi) 1163 psi MIN) Open
106-0180 Boom Raise Pressure 2646 ± 196 kPa 2156 ± 196 kPa 1-2 Normally Open
1384 ± 28 psi) 313.00 ± 28.00 psi) 1-3 Normallv Closed
106-0181 Hammer Pressure 490 ± 49 kPa 290 kPa MIN Normally
(71 ± 7 psi) (42 psi MIN) Open
9X-7781 Hyd Case Drain Pressure 210 ± 70 kPa -- Normally
Hyd Pilot Filter Pressure (30 ± 10 psi) -- Open
Hyd Return To Tank Pressure
Power Train Filter Pressure
Steering Case Drain Pressure
Steering Return Filter Pressure
111-9560 A/C Fan Override Pressure 1585 kPa ± 103 kPa 1275 kPa ± 103 kPa Normally
(230 psi ± 14.9 psi) 185 psi ± 14.9 psi) Closed
114-5333 Refrigerant Pressure (AC) 275 to 2800 kpa¹ -- Normally²
(40 to 406 psi) -- Open
116-9846 Front Pump Drive Lube Pressure 276 ± 28 kPa 179 kPa MIN Normally
(40 ± 4 psi) 26 psi MIN) Closed
128-5091 Neutralizer Pressure 551 kPa 344 kPa ± 20 kPa A-C Normally Closed
(36.3 psi) 49.9 psi ± 29 psi) A-B Normallv Open
144-5661 Fuel Filter Pressure 137.9 ± 13.8 kPa 82.7 kPa MIN Normally
Hydraulic Cooling Filter Pressure (20 ± 2 psi) (12.0 psi) Closed
Steering Cooling Filter Pressure
¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed
condition can be maintained down to 170 kpa (25psi).
² Contact postion at the contacts of the harness connector.
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 G-9 D
CONN 2 H-9 D
CONN 3 G-8 D
CONN 4 G-8 D
CONN 5 D-8 D
CONN 6 D-8 D
CONN 7 D-7 D
CONN 8 G-7 D
CONN 9 F-6 G
CONN 10 E-6 G
CONN 11 E-6 G
CONN 12 E-6 G
CONN 13 C-6 A
CONN 14 C-6 A
CONN 15 B-5 G
CONN 16 B-5 G
CONN 17 C-5 G
CONN 18 C-5 A
CONN 19 C-5 A
CONN 20 C-5 7
CONN 21 H-5 G
CONN 22 H-5 G
CONN 23 H-5 G
CONN 24 H-4 G
CONN 25 H-4 G
CONN 26 C-4 7
CONN 27 A-4 7
CONN 28 D-3 7
CONN 29 D-2 45
CONN 30 C-2 32
CONN 31 B-2 17
CONN 32 B-2 19
CONN 33 B-2 19
CONN 34 A-2 41
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.
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Distribution Circuits
Accessory Circuits (Continued)
101 RD Bat(+) 506 PU Washer - Front
103 RD Aux Ckt 508 PU Radio Speaker-Left
105 RD Key Sw 509 WH Radio Speaker-Left (Common)
109 RD Alt Output (+) Term. 511 BR Radio Speaker-Right
110 RD Aux Ckt 512 GN Radio Speaker-Right (Common)
111 RD Aux Ckt 513 OR A/C Compressor/Refrigerant
Pressure Switch
112 PU Main Power Rly Output 519 PK Thermostat
To Refrigerant Press. SW
113 OR VIMS B+ Switched 524 BU Wiper - Left (Low)
114 RD Warning Horn (Forward) 579 BR A/C Blower Motor No.1
115 RD Aux Ckt 590 GY Wiper Sw To Intermittent Module
118 GY Aux Ckt A537 PK Seat Heater
(Resistive Element In Seat)
120 YL Aux Ckt A586 OR Wiper SW To Wiper Cont
124 RD A/C A588 GN Safety Sol Relay To Sol
129 BU Aux Ckt C537 GN A/C Photo Sensor + Sig
135 BU Aux Ckt C538 OR A/C Photo Sensor - Sig
139 OR Aux Ckt C576 BU Switch #1 to Medium Pressure Sol #1
140 BU Aux Ckt C577 GY Switch #1 to Medium Pressure Sol #2
147 PU Aux Ckt C578 YL Radio Switch to Radio
149 PU Aux Ckt C592 WH Diode to Blade Relay
150 RD Bat (+)
Lighting Circuits
151 GN Aux Ckt 607 PK Flood Lamp - Front
152 BU Aux Ckt 615 YL Cab Flood Lamp
154 RD Aux Ckt 616 BU Boom Flood Lamp
168 RD Aux Ckt 633 BU Attach Lighting Ckt
172 RD Aux Ckt 638 WH Rotary Beacon
173 YL Aux Ckt
Control Circuits
176 YL Aux Ckt 763 BU Torque Convertor SW
177 RD Main Brkr 786 GN Engine Speed Cont - Hi Press SW
178 GN Main Brkr 788 YL Engine Speed (+)
179 BU Aux Ckt 791 RD Engine Speed Cont - Lo Sol
180 GN Aux Ckt A718 PU Start Aid Coolant Sensor Signal
185 YL Aux Ckt A755 PK Throttle SW #1
189 RD Aux Ckt A756 BU Throttle SW #2
191 WH Aux Ckt A757 GY Throttle SW #3
196 BU Aux Ckt A758 BR Throttle SW #4
Ground Circuits
A761 PU Electronic Pump Cont
200 BK Main Chassis A762 PU Electronic Pump Cont
201 BK Operator Monitor Return A768 BU Pump Cont Valve #1 (+)
210 BK Converter Output (24/12 Volt) A769 GY Pump Cont Valve #2 (-)
235 BK Electronic Pump Cont Gnd A770 PK Electronic Pump Control Bypass SW
To Resistor
Basic Machine Circuits
A771 PU Float SW
304 WH Starter Relay No.1 Output F771 OR Backup SW
306 GN Starter Relay Coil F772 WH Backup SW
To Neut Start SW Or Key SW F773 OR Govenor Accel
307 OR Key SW To VIMS Sensor Module F774 WH Govenor Decel
308 YL Main Power Relay Coil F774 WH Govenor Decel
309 GY Alternator Regulator Terminal J703 PK Alt Pulse Sig To Anti-Start Relay
(Was D787 GN)
310 PU Start Aid SW To Start Aid Sol 877 YL Glow Plug Magnetic SW
To Glow Plug
320 RD Horn Relay Coil To SW 954 GN Hammer SW A
321 BR Backup Alarm Lamp Travel Alarm 955 BU Hammer Sol A
322 GY Backup Alarm Lamp Travel Alarm K904 GN Pump Discharge Sig
323 WH Fuel Pump Power K905 RD Pump Discharge (+) B
325 PK Fuel Pump Relay Cut-Out K906 GN Swing Brake Sol Signal
327 PK Shutdown Sol K907 BU Swing Brake Sol (+) B
330 YL Neutral Start Relay Coil K909 BU Backup SW (+) B
365 YL Fuel Pump Relay ToSW K911 PK EIP Controller RS485 (+)
Monitoring Circuits
K912 GN EIP Controller RS485 (-)
403 GN Alternator (R) Term. K997 BU (+) V Sensor
405 GY Opr Mon Oil Press. (Low Setting) L908 OR Controller RS-232C Tx
412 BU Opr Mon Cool Flow L909 BU Controller RS-232C Ax
430 BU Opr Mon Air Filter L968 OR Electronic Pump Control Ps Valve (-)
487 OR Hyd Oil Flow SW L969 WH Electronic Pump Control Ps Valve (+)
491 PK Hyd Oil Temp Sensor L970 GY Electronic Pump Control To Switch
492 GY Coolant Temp Sensor Signal Common Return
495 GN Fuel Level Signal L971 GN Electronic Pump Control
496 WH Opr Mon Panel Hyd Oil Level To Travel Pressure Switch
C468 BU Engine Oil Level L972 BU Low Idle Switch
H414 YL Warning Switch to Alarm L974 GN Electronic Pump Control Boom Raise
Pressure Sw
H415 BR Alarm to Warning Pressure Switch L975 PK Start Aid Control Lamp Output
Accessory Circuits L976 GN Excavator Fuel Pump Switch
500 BR Wiper - Front (Park) L977 YL Trenching Sol
501 GN Wiper - Front (Low) L978 GY Level Finish Sol
8630 BU Lamp Relays
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
Normally open switch that is closed due to an applied condition, and will open again with a
specific decrease in that condition.
Normally closed switch that will open with an increase of a specific condition.
Normally closed switch that is open due to an applied condition, and will close again
with a specific decrease in that condition.
The circle indicates that the component has screw terminals and a wire can be disconnected
from it.
No circle indicates that the wire cannot be disconnected from the component.
This indicates that the component has a wire connected to it that is connected to ground.
This indicates that the component does not have a wire connected to ground. It is grounded
by being fastened to the machine.
Electrical Schematic Symbols And Definitions
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
A AA
2
A AA
1
2
325-PK-14
C
A
325-PK-14
200-BK-14
T
FUSE - A component in an electrical circuit that will open the circuit if too much current flows
through it.
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.
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.
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.
Harness And Wire Electrical Schematic Symbols
Socket
Pin
Pin or Socket
Number
Wire, Cable, or Harness
Assembly Identification
Single Wire
Connector
Circuit Number
Identification
Wire
Gauge
Wire
Color
Plug
Receptacle
9X-1123
Component
Part Number
Electrical Schematic Symbols And Definitions
1
1
1
2
2
Typical representation of a
Sure-Seal connector. The
plug and receptacle contain
both pins and sockets.
Typical representation of a
Deutsch connector. The
plug contains all sockets
and the receptacle contains
all pins.
MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is
activated by electricity and held latch 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.
Machine Harness Connector And Component Locations
3
4
5
6
8
9
10
11
12
14
15
13
16
1
2
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
35
33
34
36
38
7
39
40
41
42
43
44
33
12
11
10
3
11
12
28
30 29
19
10
13
17
33
15
5
9
8
18
7
20
32
23
41
34
31
39
35
1
40
22
21
24
4
14
38
25
26
3
6
16
3
36
2
27
37
42
43
44
45
E93448
Related Electrical Service Manuals
Form Number
Engine/Pump Control
RENR1998
RENR1044
Title
Starting And Charging
11
12
1
2
3
4
5
6
7
8
9
10
12
11
10
9
8
7
6
5
4
3
2
1
3
6
5
4
2
1
140-BU
200-BK
172-RD-18
189-RD-14
320-OR-18
154-RD-18
151-GN-18
150-RD-18
114-RD-18
168-RD-14
115-RD-14
149-PU
140-BU
177-RD-10
111-RD-14
519-PK-18
8630-BU-18
K906-GN-18
F773-OR-18
F774-WH-18
A770-PK-18
A769-GY-18
A768-BU-18
786-GN-18
K909-BU-18
A771-PU-18
L978-GY-18
L974-GN-18
L977-YL-18
K997-BU-18
788-YL-18
A762-PU-18
763-BU-18
412-BU-18
C468-BU-18
321-BR-18
405-GY-18
492-GY-18
491-PK-18
495-GN-18
430-BU-18
496-WH-18
K904-GN-18
A761-PU-18
L971-GN-18
L975-PK-18
487-OR-18
615-YL
403-GN-18
506-PU-18
L970-GY-18
A
BB
A A
A
L975-PK-18
139-OR
615-YL
111-RD-14
177-RD-10
151-GN-18
149-PU
115-RD-14
114-RD-18
154-RD-18
320-OR-18
786-GN-18
791-RD-18
A770-PK-18
A588-GN-18
8630-BU-18
K909-BU-18
189-RD-14
412-BU-18
403-GN-18
168-RD-14
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
403-GN-18
788-YL-18
A762-PU-18
C468-BU-18
405-GY-18
492-GY-18
A768-BU-18
168-RD-18
L971-GN-18
491-PK-18
496-WH-18
A768-BU-18
A769-GY-18
L978-GY-18
763-BU-18
L977-YL-18
K904-GN-18
K997-BU-18
L974-GN-18
A771-PU-18
K904-GN-18
327-PK-14
877-YL-8
405-GY-18
C468-BU-18
519-PK-18
K906-GN-18
309-GY-18
J703-PK-18
A771-PU-18
403-GN-18
109-RD-6
L974-GN-18
304-WH-8
492-GY-18
L978-GY-18
A718-PU-18
101-RD-6
L977-YL-18
A762-PU-18
763-BU-18
K997-BU-18
A
B
506-PU-18
788-YL-18
519-PK-18
BK/PK
BK
321-BR-18
200-BK-18
506-PU-18
200-BK-18
412-BU-18
ATCH
TRAVEL ALARM
3E-7738
B
COOLANT
LEVEL SW
096-0744
MOTOR
WASHER
7T-8890
CC
BB
AA
200-BK-18
412-BU-18
487-OR-18
140-BU
BATTERY
3T-5760
POSNEG NEG POS
L971-GN-18
A
ON(KEY)
GROUND
2
1
ATCH AUTO
LUBRICATION PUMP
127-5264
RD-00RD-00BK-00
G
J
H
F
E
D
C
B
A
G
J
H
F
E
D
C
B
A
9 8 7 6 5 4 3 2 1
9 8 7 6 5 4 3 2 1
E92538
PLATFORM
PLATFORMCHASSIS
GROUND STRAP
7G-1060
200-BK-18
200-BK-14
519-PK-18
200-BK-14
103-RD-18
103-RD-18
191-WH
120-YL
152-BU
200-BK-18
105-RD
185-YL-18
173-YL-18
129-BU
118-GY
K905-RD
111-RD-14
177-RD-10
140-BU
149-PU
115-RD-14
168-RD-14
114-RD-18
139-OR
151-GN-18
154-RD-18
320-OR-18
189-RD-14
172-RD-18
124-RD-14
C538-OR-18
C537-GN-18
103-RD-18
103-RD-18
172-RD-18
189-RD-14
320-OR-18
154-RD-18
151-GN-18
139-OR
114-RD-18
168-RD-14
115-RD-14
149-PU
140-BU
105-RD
124-RD-14
177-RD-10
118-GY
111-RD-14
103-RD-18
K905-RD
191-WH
C577-GY-18
152-BU
118-GY
129-BU
110-RD-14
185-YL-18
FUSE
5A 139-5345
10A 9W-1442
15A 9W-1441
111-RD-14
A
H
168-RD-14
HYD LOCK SOL
173-YL-18
A
H
H
HH
154-RD-18
189-RD-14
10
12
11
2
3
4
5
9
8
150-RD-18
OPERATOR STATION
191-WH-14
120-YL
DOME LAMP
ACC CONVERTER
189-RD-14
K905-RD
151-GN-18
CIGAR LIGHTER
114-RD-18
115-RD-14
BOOM LAMP
REFUELING PUMP
140-BU
SEAT HEATER
110-RD-14
120-YL
149-PU
139-OR-18
124-RD-14
172-RD-18
103-RD-18
191-WH-14
178-GN-10
E/P CONT
A/C /HEATER
154-RD-18
151-GN-18
115-RD-14
CAB/CHASSIS LAMP
LUBRICATOR
114-RD-18
HORN
7
6
177-RD-10
124-RD-14
103-RD-18
320-OR-18
200-BK-18
K905-RD
200-BK-18
FUSE BASE
111-4812
172-RD-18
140-BU
129-BU
149-PU
168-RD-14
173-YL-18
139-OR-18
ENG GOV
C576-BU-18
C592-WH-18
AUX CKT
147-PU176-YL
AUX CKT
179-BU-10
110-RD-14
TIMER RELAY
WASHER/WIPER
118-GY
AUX CKT
152-BU
180-GN
AUX CKT
150-RD-18
HYD LOCK SW
579-BR-14
178-GN-10
179-BU-10
179-BU-10
177-RD-10
178-GN-10
A
H H
A
320-OR-18
FFFF
152-BU
110-RD-14
BACKUP
185-YL-18
1
L25
L25
185-YL-18
HH
H
K909-BU-18
A
A
7
8
1
6
5
4
3
2
G
G
12
10
8
11
12
9
10
11
1
9
8
2
7
6
5
4
3
2
1
4
5
6
8
1
7
4
6
5
3
2
7
3
GA
GA
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
308-YL-18
307-OR-18
105-RD
590-GY-18
501-GN-18
A586-OR-18
590-GY-18
501-GN-18
A586-OR-18
135-BU
C578-YL
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K907-BU-18
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
L972-BU-18
786-GN-18
791-RD-18
173-YL-18
308-YL-18
185-YL-18
152-BU
615-YL-18
191-WH
955-BU-18
A768-BU-18
A769-GY-18
A770-PK-18
F774-WH-18
F773-OR-18
K906-GN-18
8630-BU-18
105-RD
113-OR-18
791-RD-18
786-GN-18
135-BU
C578-YL
152-BU-18
8630-BU-18
191-WH-18
A586-OR-18
501-GN-18
590-GY-18
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
105-RD
307-OR-18
308-YL-18
200-BK-18
G
200-BK-18
200-BK-18
615-YL-18
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
K909-BU-18
K907-BU-18
A770-PK-18
L969-WH-18
L968-OR-18
200-BK-18
G
A769-GY-18
A768-BU-18
K906-GN-18
185-YL-18
200-BK-18
200-BK-18
152-BU
200-BK-18
615-YL-18
K909-BU-18
K907-BU-18
200-BK-18
L969-WH-18
A770-PK-18
L968-OR-18
135-BU
A769-GY-18
A768-BU-18
A769-GY-18
C578-YL
A768-BU-18
615-YL-18
615-YL-18
K906-GN-18
173-YL-18
185-YL-18
185-YL-18
L968-OR-18
200-BK-18
F771-OR-18
F773-OR-18
L969-WH-18
A537-PK-18
F774-WH-18
615-YL-18
615-YL-18
11
8
F772-WH-18
GG
5
A770-PK-18
786-GN-18
K906-GN-18
2
12
10
K907-BU-18
9
185-YL-18
7
6
4
A537-PK-18
3
1
185-YL-18
3
2
1
173-YL-18
135-BU
200-BK-18
BACKUP EPR VALVE SW
114-0421
200-BK-18
200-BK-18
GG
BACKUP
GOV SW
110-7884
K909-BU-18
200-BK-18
K909-BU-18
791-RD-18
113-OR-18
173-YL-18
A586-OR-18
501-GN-18
590-GY-18
K909-BU-18
955-BU-18
F773-OR-18
F774-WH-18
A770-PK-18
A769-GY-18
A768-BU-18
K906-GN-18
8630-BU-18
791-RD-18
786-GN-18
152-BU-18
185-YL-18
113-OR-18
615-YL-18
191-WH-18
135-BU
C578-YL
L972-BU-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
K907-BU-18
L968-OR-18
L969-WH-18
173-YL-18
F772-WH-18
8630-BU-18
152-BU-18
200-BK-18
615-YL-18
615-YL-18
8630-BU-18
152-BU-18
ATCH-AUX SW
ATCH-RADIO SW
132-1828
F771-OR-18
G
ATCH-SEAT
HEATER SW
111-4783
200-BK-18
200-BK-18
ATCH-ROTATING
BEACON SW
L17
L17
L12
L9
C
B
A
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
ENG/PUMP CONT
145-3088
151-9367 ATCH
L972-BU-18
308-YL-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
K912-GN-18
K911-PK-18
235-BK-18
L909-BU-18
L908-OR-18
487-OR-18
954-GN-18
L972-BU-18
A758-BR-18
A757-GY-18
200-BK-18
L975-PK-18
K912-GN-18
K911-PK-18
A756-BU-18
A755-PK-18
235-BK-18
K905-RD-18
308-YL-18
235-BK-18
K905-RD-18
235-BK
K905-RD
F771-OR-18
F772-WH-18
K907-BU-18
L968-OR-18
L969-WH-18
L971-GN-18
L970-GY-18
A761-PU-18
200-BK-18
F771-OR-18
K904-GN-18
496-WH-18
430-BU-18
F772-WH-18
495-GN-18
K907-BU-18
L968-OR-18
491-PK-18
492-GY-18
MONITOR +B OUT
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
GOV ACTR (A)
EPR VALVE (+)
GOV ACTR (B)
GOV ACTR FDBK
COOLANT LEVEL SW
TRAVEL SPEED SOL
ENG SPEED SENSOR (-)
ENG SPEED SENSOR (+)
TRENCHING SOL
IMPLEMENT PRESS. SW
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
405-GY-18
321-BR-18
FRONT PUMP PRESS. SENSOR
HYD OIL LEVEL SW
AIR CLEANER SENSOR
L969-WH-18
HYD OIL TEMP SENSOR
RS485 - (VALVE CONT)
RS485 + (VALVE CONT)
RS232C (GND)
RS232C (RX)
COOLANT SENSOR
9
20
10
28
31
26
13
30
29
35
40
2
6
39
6
24
25
22
15
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS. SW
36
SWING BRAKE SOL
C468-BU-18
412-BU-18
763-BU-18
A762-PU-18
788-YL-18
23
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK)
7
L977-YL-18
8
L974-GN-18
L978-GY-18
A771-PU-18
RS485 - (LH JOYSTICK)
RS485 + (PEDAL)
9
403-GN-18
10
RS485 + (SEMI AUTO)
RS485 - (PEDAL)
RS485 + (RADIO CONT)
17
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18
TRAVEL PRESS. SW
HYD OIL FILTER INDICATOR
18
RS485 - (RADIO CONT)
RS485 + (ELEC GOV)
19
+B
+B
AIH INDICATOR
FINE SWING SW
K997-BU-18
BOOM RAISE PRESS. SW
LEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS. SW
32
33
25
KEY SW ON
RS485 - (ELEC GOV)
26
12
40
2
4
28
27
LOW IDLE SW
21
20
1
11
22
34
3
24
23
14
13
16
15
5
36
35
29
31
30
39
38
37
GND
GND
HAMMER PRESS. SW
RS232C (TX)
KEY SW START
A
37
4
3
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
32
33
14
11
34
JOYSTICK +B OUT
A
A
A
A
A
A
2
3
4
5
6
1
K905-RD
235-BK
L975-PK-18
954-GN-18
K997-BU-18
L970-GY-18
L971-GN-18
487-OR-18
A761-PU-18
K904-GN-18
496-WH-18
430-BU-18
K997-BU-18
495-GN-18
491-PK-18
492-GY-18
405-GY-18
7
8
1
6
5
4
3
2
321-BR-18
C468-BU-18
412-BU-18
2
3
4
5
6
11
1
10
9
8
7
12
763-BU-18
A762-PU-18
788-YL-18
403-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
A771-PU-18
K997-BU-18
K997-BU-18
L908-OR-18
L909-BU-18
235-BK-18
A
L10
A
L10
L9
L9
L1 L1
2
5
4
1
6
3
G
H
3
6
1
4
5
2
V
877-YL-4
AIR HEATER
5I-7746
V
877-YL-4
101-RD-4
101-RD-4
101-RD-4
877-YL-4
877-YL-4
101-RD-4
200-BK-18
200-BK-18
200-BK-18
V V
310-PU-18
200-BK-18
AIR
116-0114
1
2
877-YL-4
101-RD-4
TEMP.
308-YL-18
KEY SW.(ON)
GND
KEY SW.(START)
RELAY
CHECK TERM.
AIR HEATER
CONT UNIT
104-3204
403-GN-18
306-GN-18
INDICATOR
200-BK-18
ATCH-CONDITIONER GP
152-5085 NOTE G
3
6
1
4
5
2
C537-GN-18
579-BR-14
C538-OR-18
519-PK-18
200-BK-14
A
152-BU-18
C576-BU-18
C577-GY-18
C577-GY-18
C576-BU-18
A588-GN-18
C592-WH-18
6
5
4
3
2
1
A
H
8
7
120-YL
A588-GN-18
C592-WH-18
C592-WH-18
C577-GY-18
C576-BU-18
A588-GN-18
954-GN-18
955-BU-18
118-GY
A588-GN-18
524-BU
L19
L7
519-PK-18
C537-GN-18
200-BK-14
OPERATOR STATION
A
200-BK-14
579-BR-14
2
5
4
A
200-BK-18
A588-GN-18
HYD LOCK SOL
121-1491
2
1
1
6
H
200-BK-18
320-OR-18
NEUTRAL START
LIMIT SW
111-4799
150-RD-18
151-GN-18
154-RD-18
A588-GN-18
A588-GN-18
HORN SW
MED PRESS SWMED PRESS SW
YL
GN
BU
RD
GY
BK
MULTISWITCH JOYSTICK-LH
158-2187
ATCH
HAMMER
PRESS. SW
106-0181
955-BU-18
954-GN-18
200-BK-18
A
C576-BU-18
954-GN-18
200-BK-18
C577-GY-18
C
PLATFORM
200-BK-18
A588-GN-18
B
200-BK-18
A
L25
118-GY
524-BU
118-GY
MOTOR
-
S
+
524-GN
200-BK
A
118-GY
524-BU
200-BK
C
LOWER
WIPER MOTOR
131-0398
B
A
1
2
ATCH HAMMER SOL.
121-6303
955-BU-18
200-BK-18
A
2
1
200-BK-18
200-BK-18
200-BK-18
200-BK
200-BK
L7
3
200-BK
615-YL
615-YL
200-BK
5
4
3
2
1
OPERATOR STATION
200-BK
524-GN
L3
615-YL
615-YL
E
118-GY
524-BU
200-BK
C
+
S
B
-
MOTOR
A
L LE
1
2
GND
+B
L CHASSIS
L BOOM
WASH
W LOW
W INT
G
G
200-BK-18
A758-BR-18
A757-GY-18
A756-BU-18
113-OR-18
791-RD-18
105-RD
786-GN-18
307-OR-18
A586-OR-18
501-GN-18
SWITCH PANEL
111-4800
KEY SW
9G-7641
R
C
6
S
B
OFF
ON
ST
590-GY-18
A755-PK-18 PK
BU
GN
308-YL-18
BR
BK
200-BK-18
S4
S3
S2
S1
COM
G
THROTTLE
POS SW
106-0107
2
1
U
U
L27
200-BK-18
H415-BR-18
PRESS. SW
2
3
1
H415-BR-18
200-BK-18
H415-BR-18
200-BK-18
OVERLOAD WARNING PRESSURE
SW 144-3614
A
L27
T
T
L3
L4
L3
L5
ATCH CAB LAMP
151-2521
UPPER
WIPER MOTOR
131-0399
E
L
Y/G
Y/W
200-BK-18
118-GY
615-YL-18
A586-OR-18
501-GN-18
K912-GN-18
201-BK-18
103-RD-18
200-BK-18
K911-PK-18
590-GY-18
200-BK-18
403-GN-18
129-BU-18
C538-OR-18
C537-GN-18
200-BK-14
200-BK-18
201-BK-18
200-BK-18
K997-BU-18
L
200-BK-14
200-BK
506-PU
GND IN
WASH SW
+ 24 IN
MOT WASH
WIPER SW
OUTPUTS
INTER SW
WIND SW
4
6
9
3
500-BR-18
7
L4
D
CAB
D
D
+
GND
LIGHT
RS485-
+B
MAIN
RS485+
1
8
5
2
200-BK
524-BU
500-BR-18
WIPER CONT
127-9838
D
D
WINDSHIELD SW
9G-2795
MONITOR
151-9385
PROVISION FOR
A/C PHOTO
SENSOR
128-2163 (NOTE G)
-
SERVICE
METER
6T-7337
D
955-BU-18
152-BU
K905-RD
129-BU-18
103-RD-18
118-GY
103-RD-18
185-YL-18
105-RD
173-YL-18
113-OR-18
118-GY
191-WH
C537-GN-18
C538-OR-18
955-BU-18
120-YL
524-BU
524-BU
MULTISWITCH JOYSTICK-RH
158-2186
H415-BR-18
H415-BR-18
954-GN-18
615-YL-18
524-BU
2
1
200-BK-18
200-BK-18
200-BK-18
200-BK-18
955-BU-18955-BU-18
L972-BU-18 L972-BU-18
H415-BR-18
H414-YL-18
H414-YL-18
A537-PK-18
G
H414-YL-18
H415-BR-18
G
ATCH OVERLOAD
WARNING BUZZER
113-4683
191-WH-18 191-WH-18
A537-PK-18
A537-PK-18
200-BK-18
ATCH
SEAT WITH
SEAT HEATER
111-6458
G
L6
118-GY
H414-YL-18
191-WH-18
200-BK-18
L15
L13
L18
ATCH-OVERLOAD
WARNING SW
132-1828
G
191-WH-18
H414-YL-18
615-YL-18
615-YL-18
200-BK-18
200-BK-18
200-BK-18
200-BK-14
200-BK-14
235-BK
PLATFORM
L26
L27
200-BK-18
H415-BR-18
C578-YL
135-BU
118-GY
615-YL-18
638-WH
L970-GY-18
506-PU-18
615-YL-18
615-YL
120-YL
103-RD-18
118-GY
103-RD-18
129-BU
K905-RD
C538-OR-18
C537-GN-18
524-BU
524-BU
590-GY-18
501-GN-18
A586-OR-18
200-BK-14
200-BK-14
K997-BU-18
403-GN-18
200-BK-18
K905-RD
235-BK
K911-PK-18
K912-GN-18
954-GN-18
615-YL-18
954-GN-18
L970-GY-18
200-BK-18
L11 L12L13
L11
L14
118-GY
200-BK-14
VV
200-BK-14
590-GY-18
501-GN-18
129-BU-18
403-GN-18
K911-PK-18
K912-GN-18
103-RD-18
615-YL-18
A586-OR-18
C537-GN-18
C538-OR-18
K997-BU-18
200-BK-14
OPERATOR STATION
615-YL-18
SPEAKER LH-
SPEAKER LH+
SPEAKER RH-
SPEAKER RH+
+12V LIGHT
GROUND
MEMORY +12V
509-WH-18
508-PU-18
512-GN-18
511-BR-18
633-BU-18
210-BK
508-PU-18
C578-YL
B+ 12V
512-GN-18
511-BR-18
509-WH-18
139-OR-18
7
8
4
3
5
2
6
1
ATCH
AM/FM RADIO
LIGHT IN (DC24V)
4
615-YL-18
12V SW OUT
GND
8
7
6
5
3
2
1
200-BK
+24V BAT IN MEM
LIGHT OUT (DC12V)
+12V MEM OUT
+24V SW IN
GND
120-YL
135-BU
210-BK
139-OR-18
633-BU-18
103-RD-18
CONVERTER
1310327
12V 7A
200-BK
9
8
7
11
3
6
10
1
2
5
4
12
2
1
615-YL
615-YL
200-BK
524-BU
638-WH
200-BK
1
A
2
1
524-BU
2
135-BU
210-BK
12V SOCKET
9R-7941
524-BU
118-GY
615-YL
103-RD-18
200-BK-18
LUNCH BOX LIGHT
506-PU
120-YL
C578-YL
103-RD-18
135-BU
118-GY
CAB
2
3
4
5
6
1
8
7
ATCH SPEAKER(L)
7Y-5505
ATCH SPEAKER(R)
7Y-5505
7
6
5
4
3
8
1
2
200-BK-18
A
A A
ANTENNA
6C-3431
L26
FOR ATCH
ROTATING BEACON
L4
L3
E
E
E
E
E
E
E
E
D
200-BK
200-BK-18
AUX- HYD
RELAY
111-4871
200-BK-18
L970-GY-18
C592-WH-18
103-RD-18
D
200-BK-18
638-WH
200-BK
C592-WH-18
D
E
638-WH
L970-GY-18
C577-GY-18
C576-BU-18
310-PU-18
200-BK-18
327-PK-14
168-RD-14
GND
ON (KEY)
SOLENOID
+ BATTERY
BK-20
GN-20
BU-14
RD-14
ENG SHUTDOWN
TIMER
138-5190
330-YL-18
308-YL-18
200-BK-18
306-GN-18
200-BK-18
200-BK-18
REGULATOR
ZZ
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
THIS SCHEMATIC IS FOR THE 317B/318B-HYD EXCAVATOR.
CC
BB
AA
CABLE AS.
XX
WIRE AS.
L
K
H
G
E
D
C
B
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
IDENT PART NO. LOC
HARNESS AS.
NOTE B : USE WITH COLD WEATHER.
N
WW
R
S
BK
YL
A
C592-WH-18
200-BK-18
200-BK-18
325-PK-18
200-BK-18
200-BK-18
616-BU
322-GY-18
607-PK-14
168-RD-14
K906-GN-18
495-GN-18
SWING BRAKE
SOL
121-1491
B
2
1
200-BK-18
200-BK-18
K906-GN-18
MM
FUEL
SENSOR
105-9911
ATCH
REFUELING SW
5C-6108
2
1
B
DIODE
121-1022
309-GY-18
308-YL-18
C577-GY-18
306-GN-18
308-YL-18
C576-BU-18
168-RD-14
327-PK-14
200-BK-18
325-PK-18
495-GN-18
200-BK-18
L970-GY-18 L970-GY-18
SS
TT
RR
ZZ
YY
VV
UU
UU
TT
PP
NN
SS
WW
YY
8630-BU-18
196-BU
INSP LAMP
200-BK-18
179-BU-10
189-RD-14
113-OR-18
C576-BU-18
C592-WH-18
DIODE
121-1022
579-BR-14
A588-GN-18
113-OR-18
172-RD-18
173-YL-18
200-BK-18
DIODE
121-1022
113-OR-18
C592-WH-18
C577-GY-18
177-RD-14
308-YL-18
SWITCH PANEL
113-OR-18
579-BR-14
308-YL-18
B
M
MM
325-PK-18
179-BU-10
178-GN-10
113-OR-18
BK
GY
D
RD
BU
GN
D
YL
HAMMER SW
RIGHT SW
LOW IDLE AND
PRESS. RAISE SW
191-WH-18
118-GY
L972-BU-18
200-BK-18
L6
D
CIGAR
LIGHTER
9W-0335
308-YL-18
308-YL-18
101-RD-8
200-BK-18
308-YL-18
DIODE
121-1022
308-YL-18
K909-BU-18
200-BK-18
308-YL-18
177-RD-10
101-RD-6
112-PU-6
308-YL-18
308-YL-18
112-PU-6
105-RD
173-YL-18
177-RD-10
PP
RR
TT
129-BU
VV
XX
L21
179-BU-10
L1
1
6
7
8
9
5
4
3
2
11
12
10
200-BK-18
C592-WH-18
308-YL-18
F774-WH-18
F773-OR-18
A761-PU-18
172-RD-18
178-GN-10
101-RD-6
308-YL-18
308-YL-18
308-YL-18
110-RD-14
189-RD-14
308-YL-18
111-RD-14
308-YL-18
101-RD-6
109-RD-6
ZZ
579-BR-14
308-YL-18
124-RD-14
200-BK-18
RR
200-BK-18
307-OR-18
403-GN-18
154-RD-18
149-PU
BREAKER 2
139-4724
124-RD-14
579-BR-14
403-GN-18
J703-PK-18
607-PK-18
322-GY-18
616-BU
309-GY-18
A718-PU-18
304-WH-8
877-YL-8
101-RD-6
109-RD-6
178-GN-10
179-BU-10
235-BK-18
L908-OR-18
L909-BU-18
A588-GN-18
139-OR
151-GN-18
111-RD-14
307-OR-18
BREAKER 3
139-4724
C592-WH-18
579-BR-14
101-RD-6
877-YL-8
304-WH-8
177-RD-10
179-BU-10
L975-PK-18
308-YL-18
109-RD-8
177-RD-10
30A
K909-BU-18
308-YL-18
124-RD-14
A770-PK-18
149-PU
877-YL-8
101-RD-8
615-YL
154-RD-18
786-GN-18
791-RD-18
109-RD-8
304-WH-8
320-OR-18
114-RD-18
189-RD-14
115-RD-14
154-RD-18
307-OR-18
200-BK-18
NEUTRAL START
RELAY
111-4871
308-YL-18
306-GN-18
109-RD-6
A770-PK-18
154-RD-18
307-OR-18
189-RD-14
111-RD-14
L975-PK-18
151-GN-18
139-OR-18
A588-GN-18
L970-GY-18
791-RD-18
114-RD-18
320-OR-18
786-GN-18
149-PU
115-RD-14
615-YL
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
L975-PK-18
579-BR-14
308-YL-18
200-BK-18
A718-PU-18
200-BK
INDICATOR
403-GN-18
2
1
110-RD-14
START
RELAY
125-1302
330-YL-18
616-BU
306-GN-18
607-PK-18
322-GY-18
DISCONNECT SW
7N-0718
HH
178-GN-10
196-BU
129-BU
178-GN-10
196-BU
185-YL-18
152-BU
118-GY
AUX CKT
120-YL
191-WH-14
140-BU
139-OR-18
111-RD-14
150-RD-18
105-RD
110-RD-14
168-RD-14
K905-RD
307-OR-18
308-YL-18
308-YL-18
307-OR-18
30A
111-RD-14
KEY SW
L908-OR-18
L909-BU-18
235-BK-18
105-RD
235-BK-18
L909-BU-18
L908-OR-18
DD
BREAKER 1
6T-3645
OUT 1
OUT 2
+B
IN 1
GND
IN 2
C C
A
C
A
C
B
A718-PU-18
RELAY PANEL
6
5
4
3
2
1
105-RD
BACKUP RESISTOR
102-8015
10
308-YL-18
308-YL-18
308-YL-18
308-YL-18
200-BK-18
MM
NN
L23
4
2
3
1
C577-GY-18
168-RD-14
638-WH
103-RD-18
K997-BU-18
763-BU-18
L977-YL-18
L978-GY-18
L974-GN-18
A771-PU-18
K906-GN-18
K904-GN-18
A761-PU-18
F773-OR-18
F774-WH-18
L971-GN-18
487-OR-18
172-RD-18
A768-BU-18
168-RD-14
321-BR-18
492-GY-18
405-GY-18
C468-BU-18
A762-PU-18
788-YL-18
403-GN-18
495-GN-18
496-WH-18
491-PK-18
A769-GY-18
C576-BU-18
200-BK
200-BK
200-BK-18
HYD LOCK SOL
RELAY
111-4871
200-BK-18
200-BK-18
140-BU
200-BK-18
200-BK-18
4
3
5
T
200-BK-18
BK
1
YL
2
5
V
327-PK-14
877-YL-8
C468-BU-18
179-BU-10
178-GN-10
325-PK-18
124-RD-14
308-YL-18
3
200-BK-18
GND
F/B
+B
ACCEL
DECEL
6
ENG GOV
ACTUATOR
151-9354
KEY
200-BK-18
A
2
1
304-WH-8
B
788-YL-18
B
101-RD-6
MOTBAT
GS
RD-00
B
ENG SPEED
PICKUP
125-2966
A762-PU-18
RD-00
AA
HH
MOTOR
2
1
STARTER
127-5819
GLOW
PLUG
116-9985
877-YL-8
B
327-PK-14
ENG
SHUTDOWN SOL
136-9518
200-BK-6
109-RD-6
T
A718-PU-18
200-BK-18
AIH COOLANT
TEMP SENSOR
135-2336
B
2
1
200-BK-18
BB
B
B
B
200-BK-18
403-GN-18
109-RD-6
J703-PK-18
200-BK-18
513-OR-18
B
309-GY-18
BB
200-BK-18
B
ALTERNATOR
5I-8085
ENG OIL
LEVEL SW
111-4760
1
2
2
1
200-BK-18
200-BK-18
C468-BU-18
405-GY-18
A718-PU-18
496-WH-18
491-PK-18
168-RD-18
487-OR-18
L977-YL-18
763-BU-18
L978-GY-18
A768-BU-18
A769-GY-18
487-OR-18
168-RD-18
491-PK-18
200-BK-18
PUMP DISCHARGE
PRESS. SENSOR
106-0178
SIGNAL
GROUND
+B
BK-18
BR-18
B
C
CHASSIS
B
YL-18
200-BK-6
200-BK-18
200-BK-18
200-BK-18
K997-BU-18
200-BK-18
K904-GN-18
200-BK-18
A
200-BK-18
496-WH-18
200-BK-18
200-BK-18
B
B
B
B
2
1
ENG/PUMP CONT
SOL
111-9916
T
COOLANT TEMP
SENDER
5I-7578
LEVEL FINISH
SOL
121-1490
A768-BU-18
TRENCHING
SOL
121-1490
TRAVEL SPEED
SOL
121-1491
A769-GY-18
L978-GY-18
200-BK-18
763-BU-18
200-BK-18
L977-YL-18
200-BK-18
B
L971-GN-18
A771-PU-18
L974-GN-18
200-BK-18
200-BK-18
B
200-BK-18
B
SIGNAL
GROUND
200-BK-18
BOOM RAISE
PRESS. SW
106-0180
B
B
2
1
+B
A
168-RD-18
B
HYD OIL
FILTER
INDICATOR
133-6875
200-BK-18
200-BK-18
200-BK-18
B
IMPLEMENT
PRESS. SW
106-0179
491-PK-18
HYD OIL
TEMP SENDER
4I-5394
HYD OIL
LEVEL SW
111-4760
496-WH-18
C
T
B
200-BK-18
487-OR-18
A769-GY-18
A768-BU-18
200-BK-18
492-GY-18
492-GY-18
L978-GY-18
200-BK-18
763-BU-18
200-BK-18
TRAVEL
PRESS. SW
106-0179
200-BK-18
L977-YL-18
200-BK-18
K904-GN-18
309-GY-18
405-GY-18
403-GN-18
200-BK-6
J703-PK-18
L
E
B
P
R
ALT
B
B
K997-BU-18
K997-BU-18
K904-GN-18
EE
EE
2
1
1
2
2
1
1
ENG OIL SW
5I-8005
2
ENG
GROUND STRAP
134-3355
1
2
1
2
L20
4
L19
A A
AIR CLEANER SW
109-9330
430-BU-18
616-BU
322-GY-18
607-PK-18
877-YL-8
327-PK-14
L10
519-PK-18
200-BK-18
J703-PK-18
309-GY-18
109-RD-6
101-RD-6
A718-PU-18
ATCH
A/C CLUTCH SOL.
117-6353
304-WH-8
124-RD-14
114-RD-18
110-RD-14
115-RD-14
200-BK-18
BB
BK-00
RD-00 RD-00
POSNEGNEG POS
BATTERY
3T-5760(NOTE B)
GG
BB
HH
321-BR-18
495-GN-18
K906-GN-18
168-RD-14
607-PK-18
322-GY-18
616-BU
6
2
1
7
GG
8
9
10
11
139-OR
ATCH REFRIGERANT
LOW PRESS. SW
114-5333 (NOTE A)
1
2
B
519-PK-18
513-OR-18
200-BK-18
200-BK-18
616-BU
322-GY-18
607-PK-18
168-RD-14
200-BK
200-BK-14
168-RD-14
607-PK-18
200-BK-18
322-GY-18
200-BK-18
200-BK
616-BU
200-BK-18
607-PK-18
168-RD-14
A
B
NB
S S
200-BK-18
200-BK
607-PK-18
200-BK-18
616-BU
200-BK-18
200-BK-14
200-BK-18
322-GY-18
200-BK
12
200-BK-18
322-GY-18
N
K909-BU-18
616-BU
200-BK
200-BK-18
200-BK
S
322-GY-18
168-RD-18
200-BK-14
L976-GN-18
B
B
B
B
ATCH
BOOM LAMP
151-2521
CHASSIS
ATCH
REFUELING
PUMP
175-4807
ATCH
REFUELING
START SW(NO)
6T-9442
R
N
N
FF
HORN
7Y-3919
K
K
200-BK-18
323-WH-14
A718-PU-18
+
113-OR-18
A588-GN-18
179-BU-10
178-GN-10
309-GY-18
616-BU
308-YL-18
307-OR-18
579-BR-14
C577-GY-18
200-BK-18
1
2
B
C578-YL
L4
200-BK-14
L3
HEATER GP
144-3680
DD
BK-00
168-RD-14168-RD-14
327-PK-14327-PK-14
322-GY-18
607-PK-18
C592-WH-18
2
8
9
3
CHASSIS
DD
200-BK
200-BK
A770-PK-18
RELAY PANEL
200-BK-18
BK-00
4
1
149-PU
149-PU-18
307-OR-18
200-BK-18
111-RD-14
189-RD-14
110-RD-14
111-RD-14
200-BK-18
151-GN-18
K909-BU-18
A
TIMER RELAY
111-4870
139-OR-18
115-RD-18
A588-GN-18
791-RD-18
607-PK-18
615-YL
151-GN-18
139-OR-18
200-BK
CAB/CHASSIS
LAMP RELAY
111-4871
A588-GN-18
K909-BU-18
6
1
115-RD-14
115-RD-14
2
BB
189-RD-14
114-RD-18
5
4
5
60A
320-OR-18
791-RD-18
786-GN-18
786-GN-18
154-RD-18
615-YL
200-BK-18
149-PU
616-BU
6
3
12
2
1
7
11
8
9
-
616-BU
1
2
200-BK-14
ATCH
REFUELING
RELAY 2
111-4871
ATCH
REFUELING
RELAY 1
111-4871
200-BK-14
168-RD-14
168-RD-14
168-RD-18
168-RD-14
168-RD-14
200-BK-18
365-YL-18
L976-GN-18
325-PK-18
365-YL-18
RR
ATCH
REFUELING
STOP SW(NC)
9X-4184
365-YL-18
L976-GN-18
L976-GN-18
HORN RELAY
111-4871
BOOM LAMP
RELAY
111-4871
10
A770-PK-18
322-GY-18
114-RD-18
124-RD-14
308-YL-18
110-RD-14
320-OR-18
114-RD-18
A588-GN-18
124-RD-14
K909-BU-18
K909-BU-18
30A
BAT. BREAKER
139-4724
579-BR-14
151-GN-18
200-BK-18
616-BU
310-PU-18
149-PU
786-GN-18
A718-PU-18
11
320-OR-18
322-GY-18
114-RD-18
BUS-BAR
149-5068
3
1
2
4
BUS-BAR
149-5068
7
200-BK-18
791-RD-18
HEATER
CONT UNIT
134-3283
J703-PK-18
J703-PK-18
STARTER
CONT RELAY
094-2080
L975-PK-18
200-BK-18
487-OR-18
200-BK-18
365-YL-18
L976-GN-18
322-GY-18
616-BU
CHASSIS
LAMP
151-2523
ATCH
BOOM LAMP
151-2521
ATCH MEDIUM PRES.
147-0410
B
2
325-PK-18 325-PK-18
1
2
HEATER
RELAY
9X-8124
2
1
1
200-BK-18
A588-GN-18
325-PK-18 325-PK-18
C
2
1
HORN
7Y-3920
638-WH
607-PK-18
615-YL
12
L
GND
S
P
YL
BK
WH/BU
WH/YL
J703-PK-18
200-BK-18
403-GN-18
327-PK-14
168-RD-14
200-BK-18
308-YL-18
308-YL-18
SS
UU
200-BK-18
L23
L22
L22
L21
L16
308-YL-18
L14
C592-WH-18
L970-GY-18
N
403-GN-18
309-GY-18
N
CHECK TERM.
C576-BU-18
C577-GY-18
519-PK-18
307-OR-18
110-RD-14
RELAY
KEY SW.(START)
GND
KEY SW.(ON)
L975-PK-18
TEMP.
115-RD-14
403-GN-18
MAIN RELAY
165-4026
R
WH/GN
309-GY-18
L908-OR
L909-BU
235-BK
E
D
C
B
A
235-BK
L909-BU
309-GY-18
L908-OR
L909-BU
L908-OR
235-BK
310-PU-18
200-BK-18
GROUND STRAP
134-3344
309-GY-18
403-GN-18
308-YL-18
110-RD-14
PP
NNXX
WW
HEATER RELAY
111-4871
YY
150-6938 G-7
150-6934 G-7
150-6936 G-7
150-6937 G-7
150-6943 G-7
150-6942 G-7
150-6940 H-8
132-1827 A-2
150-6944 G-7
150-6941 G-7
150-6939 H-8
150-6935 G-7
NOTE G : USE WITH A/C UNIT.
200-BK-18
CC
RELAY PANEL
J703-PK-18
STRAP AS.
DD
NOTE A : NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
EE
134-3275 G-9
116-0080 F-9
134-3274 F-9
134-3298 E-9
105-9917 E-9
7G-1060 G-6
134-3344 G-9
134-3355 A-9
C576-BU-18
306-GN-18
330-YL-18
DOME LAMP
096-0721
HH
616-BU
200-BK
U
137-1840
140-0920
156-4092
156-4091
144-9617
130-6568
156-4090
156-4088
146-7251
116-0096
116-0098
156-4086
145-0573
144-3080
167-3451
144-7629
G-1
C-2
H-4
E-4
B-6
B-5
G-8
A-2
B-2
B-2
B-3
G-3
C-2
D-2
C-9
D-2
170-6877 CHG H00
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
HEATER
RELAY
SIS
CONN
ALTERNATOR (P TERM)
TO MACHINE STRUCTURE
CONN 1
CONN 3
CONN 4
CONN 2
CONN 5 CONN 6 CONN 7
CONN 8
CONN 9
CONN 10CONN 11
C0NN 12
CONN 13
CONN 14
CONN 18
CONN 15 CONN 16 CONN 17
CONN 19
CONN 20
CONN 21
CONN 22 CONN 23
CONN 24 CONN 25
CONN 26
CONN 27
CONN 28
CONN 29
CONN 30
CONN 31
CONN 32
CONN 33
CONN 34
139-OR-18
124-RD-14
791-RD-18
C538-OR-18
10A
10A
15A
5A
15A
5A
15A
15A
5A
5A
5A
10A
10A
10A
10A
5A
10A
10A
10A
10A
10A
15A
5A
10A
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITORING SYSTEMS CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
START AID/GLOW PLUG CIRCUIT.
ENGINE PUMP CONTROL CIRCUIT.