©1997 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR1063
July 1997
325B L Material Handler
Electrical System
2JR1-UP
A AA
1
2
325-PK-14
200-BK-14
T
This indicates that the component does not have a wire connected to ground. It is
grounded by being fastened to the machine.
This indicates that the component has a wire connected to it that is connected to ground.
105-9344
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
The circle indicates that the component has screw terminals and a wire can be disconnected from it.
Pin
Socket
Fuse
Component
Part Number
Pin or Socket
Number
Receptacle
Plug
Wire Gauge
Wire, Cable, or Harness
Assembly Identification
Wire Color
Normally closed switch that will open with an increase of a specific condition.
No circle indicates that the wire cannot be disconnected from the component.
Single Wire
Connector
Circuit Number
Identification
Ground
Connection
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Circuit Breaker
Symbol
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.
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 Symbols
Electrical Schematic Symbols And Definitions
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.
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits Accessory Circuits (Continued)
101 RD Bat (+) 578 BU Washer - Aux
103 RD Aux Ckt 590 GY Wiper Sw to Intermittent Module
105 RD Key Sw 592 BU DC/DC Converter Power Output
107 RD Eng Shutdown A513 RD DC/DC Converter Memory Output
108 BU Aux Ckt A571 PU Aux Ckt 1
109 RD Alt Output (+) Term A572 PK Aux Ckt 2
111 RD Aux Ckt A579 OR Wiper Motor (+)
112 PU Main Power Rly Output A586 OR Wiper Sw to Wiper Cont
113 OR Opr Mon Panel B (+) Switched A588 GN Safety Sol Relay to Sol
114 RD Warning Horn (Forward) C537 GN A/C Photo Sensor (+) Sig
115 PK Aux Ckt C538 OR A/C Photo Sensor (-) Sig
118 GY Aux Ckt Lighting Circuits
120 YL Aux Ckt 607 PK Flood Lamps - Front
123 WH Aux Ckt 615 YL Cab Flood Lamp
124 GN A/C 616 BU Boom Flood Lamp
129 BU Aux Ckt Control Circuits
140 BU Aux Ckt 763 BU Torque Converter Sw
147 PU Aux Ckt 786 GN Eng Speed Cont
149 PU Aux Ckt 788 YL Eng Speed (+)
150 RD Bat (+) 791 PK Eng Speed Cont
151 GN Aux Ckt A718 PU Start Aid Coolant Sensor Signal
152 BU Aux Ckt A755 PK Throttle Sw #1
154 RD Aux Ckt A756 BU Throttle Sw #2
168 RD Aux Ckt A757 GY Throttle Sw #3
172 RD Aux Ckt A758 BR Throttle Sw #4
177 RD Main Brkr A761 PU Elec Pump Cont Gov Feedback
180 GN Aux Ckt A762 PU Elec Pump Cont Eng Speed Ground
185 YL Aux Ckt A768 BU Pump Control Valve #1 (+)
189 RD Aux Ckt A769 GY Pump Control Valve #2 (-)
191 WH Aux Ckt A770 PK Elec Pump Control Bypass Sw
Ground Circuits A771 PU Float Sw
200 BK Main Chassis F771 OR Backup Sw
201 BK Opr Mon Panel F772 WH Backup Sw
235 BK Elec Pump Ctrl Gnd F773 OR Governor Accel
Basic Machine Circuits F774 WH Governor Decel
301 BU Starter No. 1 Sol J704 WH Hyd Lock Sol Relay to Grapple and Rotate Sw
304 WH Starter Rly No. 1 Output J705 WH Rotate CCW Relay to Sol
306 GN Starter Rly Coil J706 PU Grapple Close Relay to Sol
307 OR Key Sw to Neut Start Sw J707 YL Grapple Open Relay to Sol
308 YL Main Power Rly Coil J708 BR Rotate CW Relay to Sol
309 GY Alternator Regulator Terminal J710 WH Aux Ckt
310 PU Start Aid Sw To Start Aid Sol J711 GN Aux Ckt
311 WH Start Aid Sol To Temp Sw J712 YL Aux Ckt
320 OR Horn Rly Coil to Sw J713 BU Aux Ckt
321 BR Travel Alarm Lamp J714 BR Aux Ckt
322 GY Warning Horn (Forward) J715 OR Aux Ckt
326 PU Key Sw "C" Term J718 WH Aux Ckt
386 PK Air Shutoff Sol Enable J719 BU Aux Ckt
Monitoring Circuits J720 YL Aux Ckt
403 GN Alternator (R) Term J721 PU Aux Ckt
405 GY Opr Mon Oil Press J722 BR Aux Ckt
412 BU Opr Mon Cool Flow 877 YL Aux Ckt
430 BU Opr Mon Air Filter 961 GN Hyd Cont Sw
487 OR Hyd Oil Flow Sw K904 GN Pump Discharge - Signal
491 PK Hyd Oil Temp Sensor K905 RD Pump Discharge - (+) B
492 GY Coolant Temp Sensor K906 GN Swing Brake Sol - Signal
495 GN Fuel Level K907 BU Swing Brake Sol - (+) B
496 WH Opr Mon Panel Hyd Oil Level K909 BU Backup Sw - (+) B
A495 GY Alternator (R) Terminal #2 K911 PK E/P Controller - RS485 (+)
C468 BU Engine Oil Level K912 GN E/P Controller - RS485 (-)
Accessory Circuits K915 GN Fine Swing Sw - E/P Controller
501 GN Wiper - Front K997 BU (+) V Sensor
506 PU Washer - Front L908 OR Controller RS-232C TX
508 PU Radio Speaker - Left L909 BU Controller RS-232C RX
509 WH Radio Speaker - Left (Common) L968 OR Elec Pump Control PS Valve (-)
511 BR Radio Speaker - Right L969 WH Elec Pump Control PS Valve (+)
512 GN Radio Speaker - Right (Common) L970 GY Elec Pump Control to Switch Return
513 OR A/C Compressor/Refrigerant Pressure Sw L971 GN Elec Pump Control to Travel Pressure Sw
519 PK Thermostat to Refrigerant Press Sw L972 BU Low Idle Sw
546 BU Aux Hyd - Rotate CW L973 GN Fine Swing Cont Relay to Sol Valve
547 OR Aux Hyd - Rotate CCW L974 GN Elec Pump Cont Boom Raise Press Sw
548 GY Aux Hyd - Open L975 PK Start Aid Cont Lamp 1 Output
549 PK Aux Hyd - Close L977 YL Trenching Sol
576 PK Wiper - Aux L978 GY Level Finish Sol
Wire Description
A
B
B
C
C
D
D
1
1
2
2
3
3
5
5
4
4
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
2121
E
E
6
A
F
F
24
24
22
22
23
23
Machine Harness Connector And Component Locations
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Actuator - Engine Gov A-9 1 Sender - Hydraulic Oil Temp A-5 12
Air Inlet Heater C-8 2 Sensor - Air Inlet Heater Coolant Temp C-9 2
Alarm - Travel G-9 3 Sensor - Coolant Temp C-8 2
Alternator B-8 4 Sensor - Fuel Level A-5 13
Assembly - Terminal Block F-8 D Sensor - Pump Discharge Press B-8 14
Batteries - 12VDC H-8,I-8 5 Sensor - Sun Load F-1 E
Breaker - Alternator I-8 D Solenoid - A/C Clutch C-9 15
Breaker - Generator I-8 D Solenoid - Eng/Pump Control A-7 16
Breaker - Main I-8 D Solenoid - Engine Shutdown B-8 17
Control - Engine/Pump F-2 C Solenoid - Fine Swing E-7 18
Controller - Wiper/Washer E-1 A Solenoid - Grapple E-7 18
Converter - Voltage C-5 A Solenoid - Hydraulic Lock I-1 F
Diode G-7 D Solenoid - Level Finish A-7 16
Diode - Main Relay H-7 D Solenoid - Rotate D-7 18
Fuses I-4,5,6 B Solenoid - Start Aid H-9 19
Generator B-2 F Solenoid - Swing Brake E-7 18
Ground - Cab B-5 6 Solenoid - Travel Speed A-7 16
Ground - Cab E-1 E Solenoid - Trenching A-7 16
Ground - Chassis A-3 7 Switch - Air Cleaner Flow H-9 20
Ground - Chassis A-9 8 Switch - Aux Hydraulic Pressure H-3 B
Ground - Chassis I-8 D Switch - Backup EPR Valve E-5 C
Ground - Platform G-2 B Switch - Backup Governor D-5 C
Ground - Platform H-1 9 Switch - Boom Raise Pressure D-7 18
Ground - Relay Panel H-8 D Switch - Coolant Level H-9 19
Ground Strap - Chassis to Platform I-6 10 Switch - Disconnect I-8 D
Ground Strap - Chassis to Riser H-1 F Switch - Engine Oil Level A-8 1
Horn A-2 7 Switch - Engine Oil Pressure B-9 15
Lighter E-1 E Switch - Fine Swing Control D-4 C
Meter - Service F-1 E Switch - Grapple Close or Magnet Lift F-2 C
Monitor F-1 E Switch - Grapple/Magnet E-3 C
Motor - Lower Washer I-9 D Switch - Grapple Open or Magnet Drop I-1 B
Motor - Lower Wiper H-1 9 Switch - Horn I-1 B
Motor - Starter A-9 8 Switch - Hydraulic Oil Filter A-5 12
Motor - Upper Washer I-9 D Switch - Hydraulic Oil Level A-5 12
Motor - Upper Wiper C-5 6 Switch - Implement Pressure D-7 18
Pickup - Engine Speed B-9 11 Switch - Key F-2 C
Radio - 12VDC C-6,I-3 A Switch - Lower Washer D-4 C
Relay - Boom Lamp I-7 D Switch - Lower Wiper D-3 C
Relay - Cab/Chassis Lamp I-7 D Switch - Neutral Start Limit I-1 B
Relay - Grapple Close H-6 F Switch - One Touch Low Idle F-2 C
Relay - Grapple Open H-5 F Switch - Refrigerant Low Pressure C-9 15
Relay - Heater F-7 D Switch - Rotate CCW I-1 C
Relay - Horn I-7 D Switch - Rotate CW F-2 B
Relay - Hydraulic Lock Solenoid I-7 D Switch - Start Aid D-5 C
Relay - Main G-7 D Switch - Start Aid Coolant Temp B-9 4
Relay - Neutral Start F-7 D Switch - Suction Line Shutoff Limit A-6 12
Relay - Rotate CCW H-6 F Switch - Throttle Position E-3 C
Relay - Rotate CW H-5 F Switch - Travel Pressure D-7 18
Relay - Start F-8 D Switch Panel F-2 C
Relay - Timer E-7 D Unit - A/C, Heater H-5 21
Resistor - Backup I-8 D Unit - Air Inlet Heater Control I-7 D
Resistor - Timer Relay E-7 D
Machine locations are repeated for components located close together.
A = Located in the operator's compartment.
B = Located in operator's left console area.
C = Located in operator's right console area.
D = Located on or near the relay panel.
E = Located in dash area.
F = Located in Cab Riser.
Resistor, Sender and Solenoid Specifications
Part No. Component Resistance (Ohms)¹
3E-6332 Solenoid: Start Aid 6
3E-9205 Solenoid: Grapple 24.9
4I-5394 Sender: Hydraulic Oil Temp 6130 to 7500
7Y-8242 Resistor: Timer Relay 47.0 ± 4.7
8C-3663 Solenoid: Engine Shutdown
Start (Latch) Coil: 1.55 ± 0.15
Stop (Unlatch) Coil: 10.3 ± 1.03
102-8016 Resistor: Backup 47.0 ± 2.35
111-9916 Solenoid: Engine/Pump Control 11.7 ± 1.2
121-1490 Solenoid:
Level Finish
Trenching
32.0 ± 3.2
121-1491 Solenoid:
Hydraulic Lock
Swing Brake
Travel Speed
32.0 ± 3.2
134-3998 Solenoid: A/C Clutch 17.6 ± 0.6
¹ At room temperature unless otherwise noted.
Related Electrical Service Manuals
Form Number
Alternator: (9W-3043) SENR4252
Engine/Pump Control SENR9291
Starting and Charging SENR9292
Starting Motor: (104-7040)
Consist: 6V-5720 SENR3581
Consist: 106-8557 SENR3859
Starting Motor: (6V-5821) SENR3581
Title
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6449 Start Aid Coolant Temperature
38.0 ± 3.0 °C
(100.4 ± 5.4 °F)
27 °C MIN
(80.6 °F MIN)
Normally Closed
3E-6455 Engine Oil Pressure
90 ± 21 kPa
(13 ± 3.0 psi)
70 ± 21 kPa
(10 ± 3.0 psi)
A-B, Normally Open
A-C, Normally Closed
106-0179
Implement Pressure
Travel Pressure
1225.00 ± 98.00 kPa
(177.67 ± 14.21 psi)
882.00 kPa MIN
(127.92 psi MIN)
Normally Open
106-0180 Boom Raise Pressure
2646.00 ± 196.00 kPa
(383.77 ± 28.43 psi)
2156.00 ± 196.00 kPa
(312.70 ± 28.43 psi)
Normally Open
106-0181 Hydraulic Pressure
490.00 ± 49.00 kPa
(71.07 ± 7.11 psi)
290.00 kPa MIN
(42.06 psi MIN)
Normally Open
114-5333 A/C High/Low Pressure
275 to 1750 kPa ¹
(40 to 255 psi)
Normally Open ²
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 A-9 1
CONN 2 F-9 D
CONN 3 F-9 D
CONN 4 G-9 D
CONN 5 G-9 D
CONN 6 G-8 D
CONN 7 G-8 D
CONN 8 G-8 D
CONN 9 F-8 D
CONN 10 C-6 22
CONN 11 C-5 22
CONN 12 C-5 F
CONN 13 C-5 F
CONN 14 F-6 C
CONN 15 F-5 C
CONN 16 F-5 C
CONN 17 F-5 C
CONN 18 F-5 C
CONN 19 F-4 C
CONN 20 F-4 C
CONN 21 F-4 C
CONN 22 F-4 C
CONN 23 H-5 B
CONN 24 H-5 B
CONN 25 H-5 B
CONN 26 H-4 B
CONN 27 H-4 B
CONN 28 H-4 B
CONN 29 H-3 B
CONN 30 H-3 B
CONN 31 C-3 F
CONN 32 B-3 7
CONN 33 A-3 23
CONN 34 B-2 24
CONN 35 Service Connector D-2 C
CONN 36 G-5 F
CONN 37 G-5 F
CONN 38 G-8 F
CONN 39 G-8 F
CONN 40 G-8 F
CONN 41 F-9 F
CONN 42 F-9 F
CONN 43 G-9 F
CONN 44 G-9 F
CONN 45 G-9 D
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.
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.
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).
410A Over-current in digital output (swing brake solenoid).
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.
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
147-PU-18
F774-WH-18
F773-OR-18
A761-PU-18
K904-GN-18
430-BU-18
K906-GN-18
A771-PU-18
763-BU-18
200-BK
112-PU-6
K909-BU-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
786-GN-18
149-PU
320-OR-18
A770-PK-18
200-BK
140-BU
149-PU
147-PU-18
105-RD
107-RD
103-RD-18
191-WH-14
115-PK-14
120-YL
118-GY
124-GN-14
200-BK-18
235-BK-14
200-BK-14
103-RD-18
506-PU-18
403-GN-18
A771-PU-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
487-OR-18
235-BK-14
200-BK-14
200-BK-18
786-GN-18
791-PK-18
308-YL-18
307-OR-18
578-BU-18
K906-GN-18
A768-BU-18
A769-GY-18
A770-PK-18
F774-WH-18
F773-OR-18
K909-BU-18
310-PU-18
A588-GN-18
A588-GN-18
107-RD
320-OR-18
151-GN-18
118-GY
512-GN-18
511-BR-18
509-WH-18
508-PU-18
103-RD-18
519-PK-18
113-OR-18
185-YL-18
105-RD
512-GN-18
511-BR-18
508-PU-18
509-WH-18
519-PK-18
124-GN-14
113-OR-18
185-YL-18
105-RD
118-GY
124-GN-14
200-BK-14
519-PK-18
103-RD-18
403-GN-18
403-GN-18
403-GN-18
403-GN-18
200-BK-18
200-BK-18
590-GY-18
501-GN-18
A586-OR-18
786-GN-18
791-PK-18
113-OR-18
308-YL-18
307-OR-18
105-RD
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
578-BU-18
K915-GN-18
310-PU-18
A769-GY-18
A768-BU-18
K906-GN-18
185-YL-18
K909-BU-18
K907-BU-18
A770-PK-18
F772-WH-18
F774-WH-18
F773-OR-18
F771-OR-18
200-BK-18
200-BK-18
615-YL-18
235-BK-14
615-YL
615-YL
235-BK-18
235-BK-18
308-YL-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
K912-GN-18
K911-PK-18
K915-GN-18
F771-OR-18
F772-WH-18
K907-BU-18
403-GN-18
487-OR-18
A761-PU-18
K904-GN-18
496-WH-18
430-BU-18
495-GN-18
491-PK-18
492-GY-18
405-GY-18
321-BR-18
C468-BU-18
412-BU-18
763-BU-18
A762-PU-18
788-YL-18
A771-PU-18
A586-OR-18
501-GN-18
590-GY-18
200-BK-18
200-BK-18
147-PU-18
140-BU
149-PU
151-GN-18
320-OR-18
107-RD
112-PU-6112-PU-14
112-PU-14
112-PU-14
124-GN-14
147-PU-18
200-BK-18
103-RD-18
140-BU
149-PU
151-GN-18
320-OR-18
107-RD
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
191-WH-14
A572-PK-18
2
1
185-YL18
200-BK-18
320-OR-18
L64 L64
151-GN-18
200-BK-18
320-OR-18
200-BK
K909-BU-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
RELAY PANEL
786-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
309-GY-18
308-YL-18
200-BK-18
A718-PU-18
616-BU
149-PU
786-GN-18
548-GY-18
546-BU-18
320-OR-18
J721-PU-18
J720-YL-18
A588-GN-18
J715-OR
151-GN-18
200-BK-18
200-BK-18
200-BK-18
A571-PU-18
791-PK-18
A770-PK-18
1
2
200-BK-18
149-PU
200-BK-18
548-GY-18
200-BK-18
K909-BU-18
307-OR-18
546-BU-18
386-PK-18
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
306-GN-18
306-GN-18
L63
200-BK-18
200-BK-18
L970-GY-18
308-YL-18
549-PK-18
547-OR-18
548-GY-18
546-BU-18
L970-GY-18
L63
L65
K909-BU-18
A770-PK-18
791-PK-18
200-BK-18
151-GN-18
A588-GN-18
320-OR-18
786-GN-18
149-PU
616-BU
A718-PU-18
306-GN-18
310-PU-18
200-BK-18
308-YL-18
549-PK-18
200-BK-18
308-YL-18
A770-PK-18
K909-BU-18
L970-GY-18
547-OR-18
180-GN
J721-PU-18
J720-YL-18
791-PK-18
115-PK-18
115-PK-18
J715-OR
J722-BR-18
J719-BU-18
151-GN-18
J718-WH-18
200-BK-18
L62
L64
L63
L63
L63
L63
A588-GN-18
616-BU
149-PU-18
149-PU-18
149-PU
320-OR-18
AT
AU
7
8
11
6
9
10
111-RD-14
1
2
3
12
5
4
SPARE
189-RD-14
GY
A AK
112-PU-14
112-PU-14
112-PU-14
149-PU
140-BU
200-BK-18
200-BK-18
200-BK-14
103-RD-18
147-PU-18
200-BK-18
J704-WH-18
J704-WH-18
200-BK-14
200-BK-14
403-GN-18
112-PU-14
J704-WH-18
548-GY-18
549-PK-18
185-YL-18
112-PU-14
112-PU-14
112-PU-14
1
961-GN-18
AH
J715-OR
200-BK-18
546-BU-18
311-WH-18
310-PU-18
RISER
CHASSIS
2
5
8
11
J715-OR
J714-BR
AK
J713-BU
12
10
9
7
6
1
2
3
4
5
6
4
616-BU-18
3
200-BK-18
200-BK-18
200-BK-18
1
2
2
1
J712-YL
6
5
4
3
2
1
J711-GN
547-OR-18
546-BU-18
J710-WH
AK
AK
A
107-RD
1
2
3
4
5
6
7
8
9
103-RD-18
10
105-RD
149-PU
191-WH-14
11
12
A
A
AK
AK
A
A
AK
7
3
1
2
11
12
10
4
5
6
9
8
118-GY
124-GN-14
120-YL
11
12
1
2
3
4
5
6
7
8
9
10
5
10
9
8
7
1
2
6
5
4
3
2
1
12
11
8
11
L54
L55
AKA
L55
L54
A
L45
L54
AH
321-BR-18
AK
12
L55
1
2
4
3
J707-YL-18
J706-PU-18
10
9
7
6
4
A
AK
D
AK
AK
D
AK
A
3
A
10
9
8
11
7
1
2
12
3
6
5
4
12
A
11
3
10
9
8
7
1
7
2
6
4
3
5
2
1
3
6
4
5
AK
1
9
1
11
5
200-BK
L62
180-GN
L62
L62
L62
AK
115-PK-18
L62
RD
BK
SPARE
2
1
200-BK-18
4
3
5
6
A
J
311-WH-18
C468-BU-18
L64
200-BK-18
112-PU-6
A761-PU-18
BK
WH
112-PU-10
AK
AK
112-PU-10
3
2
200-BK-18
200-BK-18
F773-OR-18
AV
112-PU-10
F774-WH-18
12
K904-GN-18
11
10
200-BK-18
200-BK-18
ATCH START
AID SOL
3E-6332
200-BK-18
200-BK-18
200-BK-18
A769-GY-18
A768-BU-18
763-BU-18
200-BK-18
200-BK-18
200-BK-18
151-GN-10
6
1
3
5
1
AIR CLEANER SW
109-9330
A768-BU-18
GEN BREAKER
6N-9349
30A
2
7
A769-GY-18
101-RD-4
304-WH-8
8
9
4
311-WH-18
J
403-GN-18
309-GY-18
A
492-GY-18
A718-PU-18
L55
AK
AK
877-YL-4
A762-PU-18
788-YL-18
405-GY-18
200-BK-18
L56
F774-WH-18
F773-OR-18
A761-PU-18
200-BK-18
C468-BU-18
TRAVEL ALARM
3E-7738
L54
L54
2
B
COOLANT
LEVEL SW
096-0744
1
2
MOTOR
UPPER WASHER
7T-8890
LOWER WASHER
7T-8890
L56
A
BATTERY
3T-5760
POS
NEGNEG
POS
ATCH
BATTERY
3T-5760
(NOTE C)
200-BK-4
200-BK-18
200-BK-6
200-BK-4
A718-PU-18
200-BK-18
492-GY-18
200-BK-18
309-GY-18
403-GN-18
200-BK-6
200-BK-18
200-BK-18
200-BK-18
L57
320-OR-18
AH
AH
J705-WH-18
200-BK-18
J708-BR-18
200-BK-18
200-BK-18
2
405-GY-18
1
2
1
200-BK-18
J708-BR-18
200-BK-18
J705-WH-18
788-YL-18
A762-PU-18
304-WH-8
RD-00
RD-00
L54
200-BK-4
200-BK-6200-BK-10
200-BK-18
200-BK-18200-BK-18
200-BK-18
301-BU-10
513-OR-18
200-BK-18
200-BK-10
301-BU-10
405-GY-18
200-BK-18
788-YL-18
A762-PU-18
101-RD-4
J708-BR-18
J705-WH-18
L977-YL-18
L978-GY-18
L978-GY-18
763-BU-18
L977-YL-18
L56
L55
200-BK-18
200-BK-18
200-BK-18
200-BK
J706-PU-18
200-BK-18
J707-YL-18
200-BK-18
A770-PK-18
1
2
4
3
GRAPPLE SOL
3E-9205
200-BK-18
J707-YL-18
200-BK-18
J706-PU-18
AV
ROTATE
CW
AH
OPEN
200-BK-18
200-BK-18200-BK-18200-BK-18
ROTATE CW
RELAY
111-4871
GRAPPLE OPEN
RELAY
111-4871
GRAPPLE CLOSE
RELAY
111-4871
200-BK-18
CLOSE
180-GN
K909-BU-18
326-RD
200-BK-18
ROTATE
CCW
AT
200-BK-18
200-BK-18
200-BK-18
308-YL-18
308-YL-18
200-BK-18
200-BK-18
200-BK-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
308-YL-18
786-GN-18
149-PU
320-OR-18
A770-PK-18
K909-BU-18
AU
POS
NEG NEG
POS
877-YL-4
326-RD
K997-BU-18
ATCH START AID
COOLANT TEMP SW.
3E-6449
2
1
B
T~
125-4812
B
2
1
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUNDBK-18
BR-18
YL-18
B
C
107-9652
T~
B
GND
F/B
+B
ACCEL
B B
B
BK-00
C
2
1
DECEL
6
B
B
ENG GOV
ACTUATOR
106-0126
HH
C
B
BB
C
C
C
C
C
KEY
ALTERNATOR
9W-3043
ENG OIL
LEVEL SW
111-4759
1
2
2
1
B
T~
COOLANT TEMP
SENSOR
4I-5394
C
B
BATMTR
S
G
B
STARTER
MOTOR
104-7040
B-
2
1
ENG
SHUTDOWN SOL
8C-3663
ENG OIL
PRESS SW
3E-6455
AT
CHASSIS
BK-18
RD-18
ENG SPEED
PICKUP
6V-2455
A
C
B
A
BU-18
B+
RD
ALT
AT
A/C CLUTCH
SOL
134-3998 (NOTE E)
MOTOR
B
1
2
B
6
BBBB
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
1
2
200-BK-14
2
1
L59
L58
BK-00
A718-PU-18
386-PK-18
309-GY-18
616-BU
4
3
5
DISCONNECT SW.
7N-0719
4
ALT BREAKER
9S-0174
5
3
L44
L43
L44
YY
UU
VV
5
4
6
3
1
2
BACKUP
RESISTOR
102-8016
HYD LOCK SOL RELAY
111-4871
5
3
4
6
2
1
7
8
9
10
11
12
506-PU-18
B
CHASSIS
L42
L41
L29
L30
MAIN RELAY
3T-0376
CAB/CHASSIS LAMP SWITCH RELAY
111-4871
C
578-BU-18
EE
4
5
60A
200-BK-18
AA
200-BK-18
MOTOR
AK
6
3
12
2
1
7
11
8
9
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
10
AK
L43
L43
B
CHASSIS
L30
DIODE
121-1022
L28
DIODE
121-1022
L28
L29
L30
L29
L41
L42
L42
L41
KEY SW.(ON)
104-3204
ZZ
CHECK TERM.
RELAY
KEY SW.(START)
GND
INDICATOR
REGULATOR
TEMP.
200-BK-18
306-GN-18
177-RD-8
200-BK-18
A718-PU-18
386-PK-18
309-GY-18
616-BU
306-GN-18
304-WH-8
877-YL-4
101-RD-4
L975-PK-18
L975-PK-18
L975-PK-18
L975-PK-18
L975-PK-18
L973-GN-18
L977-YL-18
L978-GY-18
L974-GN-18
L969-WH-18
L968-OR-18
L973-GN-18
L972-BU-18
L973-GN-18
487-OR-18
200-BK-18
L971-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
ENG/PUMP CONT
139-3964
L971-GN-18
L970-GY-18
L977-YL-18
L974-GN-18
L969-WH-18
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
L972-BU-18
L971-GN-18
L975-PK-18
L977-YL-18
L974-GN-18
L978-GY-18
L969-WH-18
L968-OR-18
L972-BU-18
519-PK-18
AKAT
AS
548-GY-18
J720-YL-18
J721-PU-18
J708-BR-18
J705-WH-18
495-GN-18
321-BR-18
412-BU-18
306-GN-18
2
306-GN-18
306-GN-18
615-YL-18
3
306-GN-18
AD
4
1
NOTE E : REM'D WITH ATCH HEATER OPTION.
ROTATE CCW
RELAY
111-4871
487-OR-18
310-PU-18
107-RD
103-RD-18
306-GN-18
177-RD-14
177-RD-14
RELAY PANEL
L59
J721-PU-18
J707-YL-18
AS
177-RD-14
2
1
4
3
2
177-RD-14
177-RD-14
177-RD-14
1
4
6
5
3
546-BU-18
177-RD-14
200-BK-18
306-GN-18
J715-OR
J706-PU-18
L60
L59
310-PU-18
310-PU-18
L58
607-PK
615-YL
607-PK
L58
177-RD-14
200-BK-18
306-GN-18
200-BK-18
308-YL-18
177-RD-6
3
K909-BU-18
307-OR-18
200-BK-18
177-RD-14
4
1
2
200-BK-18
200-BK-18
AG
AT
L60
L58
L63
549-PK-18
496-WH-18
200-BK-18
BK
YL
115-PK-14
RD-00
RD-00
AX
177-RD-14
ATCH
SUCTION LINE
SHUTOFF LIMIT SW
3E-5181
B
HYD OIL
FILTER SW
133-6875
GROUND
SIGNAL
+B
C
B
A
177-RD-14
BB
B
ROTATE SOL
127-7487
HORN
SW
GRAPPLE OPEN
OR
MAGNET DROP
177-RD-14
177-RD-14
177-RD-14
ROTATE
CCW
177-RD-14
177-RD-14
177-RD-14
506-PU-18
578-BU-18
177-RD-14
177-RD-14
177-RD-14
177-RD-14
615-YL
112-PU-6
BR
WH
GY
L58
HYD OIL
TEMP SENDER
4I-5394
FUEL LEVEL
SENSOR
105-9911
4
1 2
3
2
1
HYD OIL
LEVEL SW
111-4760
2
T~
1
B
200-BK-18
386-PK-18
386-PK-18
8
9
6
5
12
11
4
10
10
9
8
12
7
6
11
5
2
1
4
3
2
1
3
7
307-OR-18
CONTROL GP
136-1206
VVAD
AD
615-YL
200-BK
177-RD-6
109-RD-6
101-RD-6
172-RD-18
111-RD-14
101-RD-6
147-PU-18
101-RD-6
MAIN BREAKER
9S-0174
118-GY
124-GN-14
12
4
10
2
6
112-PU-14
200-BK-14
200-BK-14
K912-GN-18
K911-PK-18
403-GN-18
185-YL-18
615-YL-18
K911-PK-18
K912-GN-18
149-PU
A586-OR-18
590-GY-18
501-GN-18
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
L972-BU-18
200-BK-14
103-RD-18
118-GY
615-YL-18
506-PU-18
403-GN-18
200-BK-14
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
615-YL
615-YL
506-PU-18
112-PU-14
112-PU-14
180-GN
189-RD-14
590-GY-18
501-GN-18
A586-OR-18
103-RD-18
8
103-RD-18
508-PU-18
509-WH-18
511-BR-18
512-GN-18
118-GY
103-RD-18
140-BU
105-RD
107-RD
103-RD-18
308-YL-18
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K915-GN-18
K907-BU-18
200-BK-18
308-YL-18
147-PU-18
200-BK-18
115-PK-14
112-PU-6
120-YL
191-WH-14
151-GN-10 151-GN-10
151-GN-10 151-GN-10
L66
151-GN-10
151-GN-10
151-GN-10
200-BK-10
J715-ORJ715-OR
200-BK-10
151-GN-10
L66
1
L66
L66
BU
115-PK-14
10A
10A
15A
10A
10A
10A
A A
ENG GOV
15A
7
8
1
6
5
4
3
2
PLATFORMRISER
GROUND STRAP
7G-1060
K909-BU-18
308-YL-18
CAB/CHASSIS LAMP
RADIO
LOWER WASHER/WIPER
WASHER/WIPER
H H
CIGAR LIGHTER
A/C /HEATER
10A
HORN
FUSE
10A 9W-1442
15A 9W-1441
BACKUP
A
615-YL
200-BK
15A
DOME LAMP
KEY SW
BOOM LAMP
FINE SWING
10A
10A
10A
10A
10A
10A
10A10A
10A
10A
10A
10A
15A
E/P CONT
HYD LOCK SOL
10A
304-WH-8
308-YL-18
SHUTDOWN
AUX CKT
ATCH LUBRICATOR
L58
J705-WH-18
6
8
1
7
4
5
3
2
HYD LOCK SW
J706-PU-18
JJJ
J
J
J
FUSE BASE
111-4812
J707-YL-18
506-PU-18
C
B
A
403-GN-18
RD
BR
152-BU
118-GY
J708-BR-18
112-PU-6
152-BU
200-BK-18
200-BK-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
A755-PK-18
763-BU-18
A756-BU-18
ROTATE CW
CONTROL GP
136-1206
A771-PU-18
306-GN-18
A757-GY-18
177-RD-8
K997-BU-18
788-YL-18
A762-PU-18
412-BU-18
430-BU-18
321-BR-18
405-GY-18
492-GY-18
491-PK-18
495-GN-18
A758-BR-18
152-BU
496-WH-18
L57
K
K
308-YL-18
L975-PK-18
615-YL
L57
NOTE C : USE WITH COLD WEATHER.
ZZ
200-BK-18
200-BK-18
L65
L65
L65
L65
K
L65
ATCH GENERATOR
144-4361
L66
AU
L66
L66
B
C
A
200-BK-18
+B
GND
J720-YL-18
548-GY-18
J706-PU-18
200-BK-18
GEN SOL
DROP
LIFT
K997-BU-18
J722-BR-18
J719-BU-18
L66
AT
J718-WH-18
151-GN-10
200-BK-10
AW
AX
N
AX
AK
AH
L10
191-WH-14
191-WH-14
J704-WH-18
308-YL-18
113-OR-18
123-WH-14
123-WH-14
113-OR-18
308-YL-18
J704-WH-18
615-YL
308-YL-18
576-PK
200-BK-18
200-BK
200-BK-18
200-BK-18
114-RD
114-RD
114-RD
235-BK-18
K997-BU-18
AW
A
546-BU-18
1
8
6
10
12
7
9
11
2
J704-WH-18
547-OR-18
191-WH-14
5
K997-BU-18
4
200-BK-14
L970-GY-18
152-BU
235-BK-18
J704-WH-18
961-GN-18
C468-BU-18
K907-BU-18
F772-WH-18
F771-OR-18
K915-GN-18
K911-PK-18
K912-GN-18
152-BU
60A
3
549-PK-18
548-GY-18
L909-BU-18
L908-OR-18
487-OR-18
K904-GN-18
K905-RD-18
152-BU
235-BK-18
200-BK-18
J704-WH-18
546-BU-18
547-OR-18
A
512-GN-18
511-BR-18
509-WH-18
508-PU-18
CONNECTOR
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
FRONT PUMP PRESS SENSOR
HYD OIL LEVEL SW
AIR CLEANER SENSOR
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
ALTERNATOR (R TERM)
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS SW
36
SWING BRAKE SOL
23
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK)
7
CAB
8
RS485 - (LH JOYSTICK)
RS485 + (PEDAL) 9
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
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
DOME LAMP
6C-9121
2
3
4
5
6
1
8
7
37
4
3
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
J704-WH-18
32
33
DEGITAL OUT (-)
DEGITAL OUT (-)
14
11
34
SPEAKER (L)
6T-7695
SPEAKER (R)
6T-7695
2
1
8
3
5
4
7
6
129-BU
120-YL
A
1
113-OR-18
6
4
3
2
4
3
1
2
123-WH-14
F
F
F
F
E E
A
A A
A/C & HEATER
UNIT
126-3376
(NOTE E)
177-RD-8
L7
PLATFORM
A
JOY STICK +B OUT
BK-00
RD-00
RD-00
AK
CHASSIS
DD
DD
GG
(NOTE C)
CC
BK-00
FF (NOTE C)
BB
EE (NOTE C)
AA
L15
L971-GN-18
L15
BB
115-PK-14
189-RD
154-RD-18
111-RD-14
150-RD-18
K997-BU-18
189-RD
154-RD-18
111-RD-14
150-RD-18
BB
C538-OR-18
B
C537-GN-18
AK
AK
L45
L15
L50
RELAY PANEL
AV
114-RD-18
114-RD-18
L15
D
AK
L48 L47
200-BK-18
150-RD-18
189-RD
154-RD-18
111-RD-14
150-RD-18
A495-GY-18
548-GY-18
A495-GY-18
A495-GY-18
150-RD-18
114-RD
154-RD-18
189-RD
111-RD-14
K909-BU-18
306-GN-18
306-GN-18
607-PK
615-YL
150-RD-18
615-YL
306-GN-18
K909-BU-18
786-GN-18
177-RD-14
L10
320-OR-18
A513-RD-18
592-BU-18
L10
C538-OR-18
C537-GN-18
549-PK-18
548-GY-18
308-YL-18
576-PK
200-BK
5
A
A
3
1
4
2
576-PK
K906-GN-18
310-PU-18
877-YL-4101-RD-4
386-PK-18
200-BK-18
326-RD
129-BU
403-GN-18
615-YL-18
103-RD-18
C538-OR-18
K997-BU-18
A768-BU-18
172-RD-18
12
WW
306-GN-18
200-BK-18
200-BK-18
177-RD-14
200-BK-18
321-BR-18
200-BK-18
430-BU-18
412-BU-18
306-GN-18
310-PU-18
311-WH-18
430-BU-18
200-BK-18
200-BK-18
412-BU-18
A495-GY-18
111-RD-14
189-RD
154-RD-18
154-RD-18
189-RD
177-RD-14
111-RD-14
A495-GY-18
RELAY PANEL
11
10
9
K912-GN-18
K911-PK-18
200-BK-18
501-GN-18
L974-GN-18
C537-GN-18
K906-GN-18
506-PU-18
590-GY-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
JJ
HH
GG
FF
EE
DD
CC
BB
AA
CABLE AS.
VV
WIRE AS.
L974-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-14
A586-OR-18
A579-OR
GN
YL
200-BK-14
K
J
H
F
E
D
C
B
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
IDENT PART NO. LOC
AW
200-BK-18
HARNESS AS.
592-BU-18
310-PU-18
509-WH-18
508-PU-18
512-GN-18
511-BR-18
A513-RD-18
592-BU-18
200-BK-18
A513-RD-18
615-YL
CONVERTER
112-3543 (2.5A)
615-YL
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
495-GN-18
6
1
2
3
4
5
616-BU
496-WH-18
487-OR-18
491-PK-18
GND
306-GN-18
386-PK-18
L977-YL-18
763-BU-18
OUT
L978-GY-18
IN
MEM
A768-BU-18
A769-GY-18
K904-GN-18
K997-BU-18
IGN
105-RD
F773-OR-18
F774-WH-18
A770-PK-18
A769-GY-18
A768-BU-18
K906-GN-18
615-YL-18
L973-GN-18
578-BU-18
307-OR-18
308-YL-18
791-PK-18
786-GN-18
185-YL-18
A761-PU-18
F773-OR-18
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
F774-WH-18
L52
326-RD
172-RD-18
519-PK-18
REFRIGERANT
LOW PRESS SW
114-5333 (NOTE A)
(NOTE E)
513-OR-18
519-PK-18
405-GY-18
PK
788-YL-18
1
2
C
KK
A762-PU-18
C468-BU-18
109-RD-6
200-BK-18
101-RD-4
304-WH-8
607-PK
322-GY
K909-BU-18
309-GY-18
492-GY-18
A718-PU-18
877-YL-4
607-PK
311-WH-18
B
ANTENNA
8E-1118
200-BK-18
495-GN-18
616-BU
200-BK-18
L18
495-GN-18
200-BK-18
616-BU
311-WH-18
A
J
321-BR-18
412-BU-18
430-BU-18
310-PU-18
8
7
5
4
3
2
12
1
10
8
11
12
9
10
11
4
3
2
1
9
8
2
7
6
5
4
3
2
1
4
5
6
1
7
3
3
HH
AA
H
2
A
H
4
A
200-BK-18
200-BK-18
L969-WH-18
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
L8
L52
L970-GY-18
12 VDC RADIO
3E-7140
(NOTE F)
NOTE F : HORIZONTAL MTG LOCATION FOR CASSETTE
L8
L8
L8
L18
L20
L8
L8
L20
306-GN-18
L20
200-BK-18
200-BK-18
L8
200-BK-18
L8
A718-PU-18
309-GY-18
616-BU
547-OR-18
304-WH-8
877-YL-4
101-RD-4
K905-RD-14
150-RD-18
150-RD-18
150-RD-18
150-RD-18
150-RD-18
154-RD-18
L40
L17
200-BK-18
200-BK-18
L15
L17
L38
L37
L17
615-YL-18
615-YL-18
200-BK-18
L8
MAGNET - GRAPPLE
115-PK-14
K905-RD-14
150-RD-18
108-BU
GRAPPLE/MAGNET SW
146-0238
154-RD-18
L970-GY-18
K905-RD-14
172-RD-18
L973-GN-18
L15
L17
ANTENNA
CABLE
8R-6111
L40
L39
L39
L8
L38
L37
YY
147-PU-18
615-YL-18
615-YL-18
L37
L38
578-BU-18
177-RD-14
L973-GN-18
322-GY
L39
200-BK-18
115-PK-14
200-BK-18
172-RD-18
189-RD
154-RD-18
150-RD-18
607-PK
K907-BU-18
111-RD-14
K905-RD-14
L22
2
1
OUT 1
+B
IN 2
IN 1
L21
GND
OUT 2
L20
UU
L19
ZZ
YY
JJ
XX
WW
12
1
8
2
K905-RD-14
10
547-OR-18
11
3
4
549-PK-18
180-GN
168-RD
J
1
2
9
TIMER RELAY
111-4870
7
6
XX
GND
180-GN
CONV (OUT)
K905-RD-14
5
615-YL-18
NEUTRAL
START RELAY
111-4871
START RELAY
125-1302
10A
200-BK-18
K909-BU-18
200-BK-18
L970-GY-18
200-BK-18
180-GN
549-PK-18
L21
547-OR-18
J720-YL-18
J719-BU-18
J721-PU-18
J718-WH-18
J715-OR
J722-BR-18
XX
L19
200-BK-18
180-GN
200-BK-18
L970-GY-18
200-BK-18
185-YL-18
K909-BU-18
L3
L18
L22
L21
L18
L58
L34
L8
L19
L3
L34
L19
L3
L4
L25
L19
L3
L25
L4
L33
L21
168-RD
L31
L9
114-RD
L12
L13
AUX CKT
L13
L12
L11
200-BK-18
L9
592-BU-18
JJ
L31
HH
L33
L33
L33
L33
K915-GN-18
L20
KK
308-YL-18
L19
L3
L25
L4
L4
L25
L3
L19
L20
A513-RD-18
511-BR-18
L31
L4
L25
L3
L19
L20
512-GN-18
L20
L25
L3
L4
L4
L3
L2
L19
L20
L25
508-PU-18
L2
K997-BU-18
K997-BU-18
J704-WH-18
615-YL-18
509-WH-18
WIRES K911-PK & K912-GN TO BE TWISTED AROUND
EACH OTHER AT LEAST 1 TURN PER 25 mm.
615-YL-18
AU
L27
L26
113-OR-18
615-YL
L27
L26
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
J720-YL-18
615-YL-18
J719-BU-18
A769-GY-18
J704-WH-18
113-OR-18
152-BU-18
615-YL-18
A768-BU-18
592-BU-18
K906-GN-18
108-BU
615-YL-18
185-YL-18
L29
L28
129-BU
109-RD-6
129-BU
SWITCH PANEL
113-OR-18
AB
607-PK
WW
310-PU-18
J721-PU-18
J718-WH-18
J715-OR
615-YL-18
J722-BR-18
615-YL-18
200-BK-18
308-YL-18
H
ATCH START
AID SW
111-4784
546-BU-18
114-RD
1
2
185-YL-18
112-PU-14
L5
151-GN-18
L20
L3
L19
L21
L20
L22
LOWER
WIPER SW
111-4785
LOWER
WASHER SW
111-4786
H
L11
FINE
SWING CONT SW
111-4788
115-PK-14
308-YL-18
HH
BACKUP
EPR VALVE SW
114-0421
H H
BACKUP
GOV SW
110-7884
H
200-BK-14
200-BK-18
200-BK-18
1
3
2
4
200-BK
615-YL
200-BK
200-BK
200-BK-14
200-BK
CC
HEATER
RELAY
116-0114
RESISTOR
7Y-8242
KK
B
B
AK
AK
2
1
B
403-GN-18
109-RD-6
519-PK-18
FINE SWING
SOL
116-3526
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
1
109-RD-6
2
J704-WH-18
J704-WH-18
RH SPKR (-)
RH SPKR (+)
LH SPKR (-)
A
LH SPKR (+)
6
5
3
4
2
1
8
547-OR-18
7
L8
152-BU
1
B
2
1
B
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
TRAVEL
PRESS SW
106-0179
L47
L50
L48
AK
B
B
B
B
DB
172-RD-18
322-GY
L51
L45
607-PK
L49
L51
L49
L50
L51
113-OR-18
L45
L44
L42
L41
L29
L30
L44
L42
L41
L29
L30
L30
L29
L41
GG
L6
A588-GN-18
200-BK-18
961-GN-18
L30
L29
L28
F
108-BU
120-YL
-
+
-
+
512-GN-18
511-BR-18
509-WH-18
508-PU-18
OR
109-RD-6
326-RD
4
616-BU
200-BK
3
2
103-RD-18
118-GY
A579-OR
F
615-YL
615-YL
UPPER WIPER
MOTOR
134-5551
200-BK-14
GND
B+
P
T~
L42
MOTOR
L
H
386-PK-18
306-GN-18
491-PK-18
1
487-OR-18
180-GN
496-WH-18
200-BK-18
386-PK-18
WH-18
WH-18
WH-18
WH-18
306-GN-18
B
491-PK-18
200-BK-18
200-BK-18
L44
A571-PU
3
616-BU
H
4
A572-PK
BR
A572-PK
A571-PU
180-GN
615-YL
322-GY
200-BK
200-BK
1
2
WIPER
W INT
W LOW
PUMP
+B
WASH
GND
GND
H
M
A572-PK
A571-PU
H
326-RD
180-GN
961-GN-18
961-GN-18
549-PK-18
200-BK-14
AE
4
200-BK
H
H
WH
J704-WH-18
BK
BU
548-GY-18
J704-WH-18
326-RD
308-Yl-18
L10
200-BK-18
J
J
615-YL
L970-GY-18
A579-OR
118-GY
M
N (NOTE D)
M
N (NOTE D)
M
N
B
1
3
2
A758-BR-18
118-GY
115-PK-14
111-RD-14
2
1
8
7
5
6
4
3
508-PU-18
322-GY
509-WH-18
511-BR-18
J
512-GN-18
6V-5821 (NOTE C)
F
307-OR-18
A757-GY-18
615-YL-18
A756-BU-18
+B
200-BK-18
J
576-PK
615-YL
120-YL
118-GY
GY
BK
A513-RD-18
OR
A755-PK-18
L45
C538-OR-18
200-BK-18
129-BU
C537-GN-18
C538-OR-18
BLOCK
121-1023
607-PK
L971-GN-18
A771-PU-18
L971-GN-18
A771-PU-18
L45
152-BU
506-PU-18
L49
115-PK-18
ATCH HYD CTL
J
A
GN
200-BK
105-RD
A586-OR-18
549-PK-18
549-PK-18
C537-GN-18
HYD OIL FILTER SW
113-OR-18
5
M
L7
L59
A513-RD-18
548-GY-18
ANTENNA CABLE
134-4430
501-GN-18
3
592-BU-18
200-BK-18
L24
12 VDC RADIO
103-8525
REMOVAL TOOL
7Y-5493
172-RD-18
322-GY
168-RD
150-RD-18
K912-GN-18
616-BU
A
C538-OR-18
201-BK-18
200-BK-18
C
B
A
103-RD-18
RH SPKR (-)
C537-GN-18
N
5
4
3
2
1
118-GY
108-BU
129-BU
A579-OR
A513-RD-18
615-YL
120-YL
592-BU-18
A579-OR
F
A
113-OR-18
140-BU
123-WH-14
J704-WH-18
615-YL
114-RD
123-WH-14
J704-WH-18
J704-WH-18
A513-RD-18
592-BU-18
177-RD-14
+B
COMP
GND
SUN+
SUN-
320-OR-18
154-RD-18
189-RD
172-RD-18
L22
RH SPKR (+)
LH SPKR (-)
L17
L15
K905-RD-14
LH SPKR (+)
L22
111-RD-14
150-RD-18
200-BK
616-BU
322-GY
151-GN-18
308-YL-18
ATCH
HEATER UNIT
128-9726
152-BU
519-PK-18
L24
615-YL
114-RD
200-BK-18
J704-WH-18
548-GY-18
200-BK-18
L970-GY-18
L970-GY-18
F
615-YL
CONV (MEM)
308-YL-18
326-RD
200-BK-14
200-BK-18
200-BK
200-BK-18
129-BU
OPERATOR STATION
123-WH-14
108-BU
1
114-RD
140-BU
322-GY
6
113-OR-18
113-OR-18
129-BU
607-PK
200-BK-18
103-RD-18
118-GY
A579-OR
A579-OR
108-BU
6
123-WH-14
200-BK
123-WH-14
607-PK
150-RD-18
607-PK
154-RD-18
200-BK
A588-GN-18
L7
A
A
152-BU
C
ATCH FAN
AE
172-RD-18
L8
B
200-BK-14
519-PK-18
108-BU
K911-PK-18
590-GY-18
L6
308-YL-18
403-GN-18
A579-OR
C538-OR-18
C537-GN-18
200-BK-14
L65
201-BK-18
200-BK-18
J705-WH-18
200-BK
607-PK
3
1
4
322-GY
322-GY
2
B
200-BK-14
J704-WH-18
322-GY
615-YL
L972-BU-18
200-BK-18
308-YL-18
200-BK-18
113-OR-18
791-PK-18
786-GN-18
306-GN-18
A586-OR-18
501-GN-18
590-GY-18
L20
CAB
CAB
547-OR-18
J704-WH-18
546-BU-18
J
103-RD-18
120-YL
LAMP
126-7487
GND
114-RD
J704-WH-18
322-GY
115-PK-14
546-BU-18
6
A
154-RD-18
CONV (OUT)
200-BK
576-PK
CONV (MEM)
B
J704-WH-18
2
AC
4
1
114-RD
200-BK-18
592-BU-18
A513-RD-18
512-GN-18
511-BR-18
509-WH-18
2
1
J704-WH-18
200-BK-18
961-GN-18
615-YL
189-RD
172-RD-18
L21
3
508-PU-18
L20
L5
L11
L12
H
L7
L6
L6
E
CAB
J
PLATFORM
120-YL
E
E
+
7
H
ONE TOUCH
LOW IDLE SW
L19
114-RD
114-RD
607-PK
J
200-BK-18
HYD
LOCK SOL
121-1491
L15
L17
L15
8
L14
+B
L. CHASSIS
L. BOOM
ATCH LAMPS
306-GN-18
WASH
W. LOW
W. INT
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
YL
LAMP
126-7487
200-BK
200-BK-18
GN
1
2
6
5
4
GROUND STRAP
8X-5802
NEUTRAL START
LIMIT SW
111-4799
J715-OR
129-BU
L15
L975-PK-18
AC
K997-BU-18
326-RD
L21
L19
L3
200-BK
L21
L19
L3
L18
L3
L18
AC
GRAPPLE CLOSE
OR
MAGNET LIFT
L13
L13
L12
L11
L13
L12
L11
L9
E
K997-BU-18
L7
K905-RD-18
K905-RD-18
L14
L1
A
A
E
L7
L6
L7
L1
AC
AE
B
2
L1
SW INPUT
K905-RD-18
AC
L20
322-GY
CHASSIS
OPERATOR STATION
S4
S3
S2
S1
COM
AB
108-BU
3
B
322-GY
113-OR-18
607-PK
HORN
7T-0970
F
200-BK
ATCH
BOOM LAMP
5I-8250
607-PK
200-BK
4
MACHINE SHOWN IN THE GRAPPLE MODE
NOTE D : USE WITH FALLING OBJECT GUARD
200-BK-18
616-BU-18
H
200-BK
MONITOR
106-0172
200-BK
SWITCH PANEL
111-4800
KEY SW
9G-7641
H
607-PK
113-OR-18
322-GY
607-PK
L2
SUN LOAD
SENSOR
128-2162
L3
2
1
LOWER
WIPER MOTOR
131-0398
+
-
L2
UU
+1
-
MOTOR
SERVICE
METER
6T-7337
CHASSIS
LAMP
5I-8251
THROTTLE
POS SW
106-0107
ATCH
BOOM LAMP
5I-8250
AS
D-3
F-6
I-8
F-8
G-1 (NOTE D)
B-2
F-9
D-7
I-8
I-8
F-8
A-9
H-8 (NOTE C)
H-8 (NOTE C)
A-8 (NOTE C)
I-8
I-8
I-8
A-8
G-7
B-2
H-3
D-3
G-1
E-1
F-8
A-9
A-3
F-8
F-8
F-8
F-8
C-2
G-1
A-2
A-2
A-6
F-8
128-8936
111-4831
145-8937
145-8936
145-8980
111-4832
7Y-8298
116-0242
116-0080
125-4767
111-4881
125-4727
116-0080
121-1046
128-8937
111-4833
111-4830
111-4829
128-8938
111-4826
G-5
145-9145
145-9144
129-8144
140-0204
133-9656
111-4835
132-1979
141-6437
128-7337
128-7336
132-1978
130-8446
130-8445
130-8444
130-2211
133-8895
132-1973
121-1044
145-9164
322-GY
L6
EE
R
C
S
B
WIPER/WASHER
CONTROLLER
127-9838
615-YL
OFF
615-YL
ON
ST
NOTE A : NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
L7
LIGHTER
9W-0335
607-PK
607-PK
2
1
AUX HYD
PRESS SW
106-0181
200-BK
L7
HORN
7T-0969
L6
THIS SCHEMATIC IS FOR THE 325B MATERIAL HANDLER. (146-0213)
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
TO MACHINE STRUCTURE
SERVICE
AIR INLET HEATER
TEMPERATURE SENSOR
AIR INLET HEATER COOLANT
AIR INLET HEATER
CONTROL UNIT
CONN 1
CONN 42
CONN 41
CONN 2
CONN 44
CONN 45
CONN 5
CONN 40 CONN 6
CONN 39
CONN 38
CONN 7
CONN 8
CONN 9
CONN 43
CONN 4
CONN 3
CONN 10
CONN 11
CONN 12
CONN 13
CONN 35
CONN 31
CONN 32
CONN 34
CONN 33
CONN 14
CONN 15
CONN 16
CONN 17
CONN 18 CONN 19
CONN 20
CONN 21
CONN 22
CONN 37
CONN 36
CONN 23
CONN 24 CONN 25
CONN 26
CONN 27
CONN 28
CONN 29
CONN 30
E02321
H
G
I
H
G
I
E
D
C
B
A
F
9 8 7
9 8 7
6 5 4
6 5 4
3 2
1
F
E
D
3 2
1
C
B
A
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.
MONITOR CIRCUIT.
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CIRCUIT.
AIR INLET HEATER/START AID CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
