SENR9293
July 1996
325B L and 325B LN Excavators
Electrical System
6DN1-UP
8FN1-UP
4DS1-UP
5BS1-UP
©
1996 Caterpillar
All Rights Reserved
Printed in U.S.A.
Title Form No.
Alternator: (9W-3043)
SENR4252
Engine/Pump Control
SENR9291
Starting And Charging
SENR9292
Starting Motor: (1 04-7040)
Consist: 6V-5720
Consist: 1 06-8557
SENR3581
SENR3859
Related Service Manuals
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Air Inlet Heater C-8
2 Sensor - A/C Photo
F-1 E
Alarm - Travel G-9
3 Sensor - Air Inlet Heater Coolant Temp
C-9 2
Alternator B-8
4 Sensor - Coolant Temperature
C-8 2
Assembly - Terminal Block F-8
D Sensor - Fuel Level
A-5 13
Batteries - 12VDC 1-8,H-8
5 Sensor - Overload Warning Device
F-9 7
Breaker - Alternator I-8
D Sensor - Pump Discharge Press
B-8 14
Breaker - Main I-8
D Solenoid - A/C Clutch
C-9 15
Control - Engine/Pump F-2
C Solenoid - AC1 On/Off
I-6 18
Control - Overload Warning Device F-6
A Solenoid - AC2 On/Off
I-6 18
Control - Wiper E-1
A Solenoid - Eng/Pump Control
A-7 16
Controller - Aux Hydraulic D-7
16 Solenoid - Engine Shutdown
B-9 17
Converter - Voltage H-1
A Solenoid - Fine Swing
E-8 18
Diode G-7
D Solenoid - Flow Control (Prop)
I-5 18
Diode - Main Relay H-7
D Solenoid - Hammer 2
I-6 18
Diode - Refueling A-3
6 Solenoid - Hydraulic Lock
I-1 F
Fuses 1-4,3
B Solenoid - Level Finish
A-7 16
Ground - Cab B-6
22 Solenoid - R1/R2
I-6 18
Ground - Cab D-1
E Solenoid - Start Aid
H-9 19
Ground - Chassis A-9
8 Solenoid - Swing Brake
E-7 18
Ground - Chassis B-3
7 Solenoid - Travel Speed
A-7 16
Ground - Chassis I-8
D Solenoid - Trenching
A-7 16
Ground - Platform G-2
B Switch - Air Cleaner Flow
H-9 20
Ground - Platform H-1
9 Switch - Aux Hydraulic Control
D-3 C
Ground - Relay Panel G-7
D Switch - Aux Pressure
I-6 18
Ground Strap - Chassis to Platform I-5
10 Switch - Backup EPR Valve
E-5 C
Horn A-2
7 Switch - Backup Governor
D-5 C
Joystick F-1
C Switch - Boom Raise Pressure
D-8 18
Joystick I-1
B Switch - Coolant Level
H-9 19
Lighter E-1
E Switch - Disconnect
I-8 D
Meter - Service F-1
E Switch - Engine Oil Level
A-8 1
Monitor F-1
E Switch - Engine Oil Press
B-9 15
Motor - Washer I-9
D Switch - Fine Swing Control
D-4 C
Motor - Engine Gov A-9
1 Switch - Foot Pedal LH
H-5 A
Motor - Lower Wiper H-1
9 Switch - Foot Pedal RH
H-5 A
Motor - Starter B-9
8 Switch - Hydraulic Oil Filter
A-5 12
Motor - Upper Wiper G-1
23 Switch - Hydraulic Oil Level
A-5 12
Pickup - Engine Speed B-9
11 Switch - Implement Pressure
D-8 18
Pump - Refueling A-2 6
Switch - Key
F-3 C
Radio - 12VDC I-3 A
Switch - Neutral Start Limit
I-1 B
Relay - Boom Lamp I-7 D
Switch - Overload Warning Device
D-4 C
Relay - Cab/Chassis Lamp I-7 D Switch - Pressure I-5 18
Relay - Heater F-7 D Switch - Proximity I-6 18
Relay - Horn I-7 D Switch - Refrigerant Low Press C-9 19
Relay - Hydraulic Lock Solenoid I-7
D
Switch - Refueling A-5 24
Relay - Main G-7
D
Switch - Refueling Start (NO) A-4 6
Relay - Neutral Start F-7
D
Switch - Refueling Stop (NC) A-4 6
Relay - Refueling Power A-3
6
Switch - Seat Heater D-4 C
Relay - Refueling Start A-3
6
Switch -Start Aid D-5 C
Relay - Refueling Stop A-3
6
Switch - Start Aid Coolant Temp B-9 4
Relay - Start F-8
D
Switch - Throttle Position E-3 C
Relay - Timer E-7
D
Switch - Travel Pressure D-8 18
Resistor - Backup I-8
D
Switch Panel F-2 C
Resistor - Timer Relay E-7
D
Unit - A/C H-4 21
Sender - Hydraulic Oil Temp A-5
12
Unit - Air Inlet Heater Control I-7 D
Machine locations are repeated for components located close together.
A =Located in operator's compartment.
B = Located in operator's left console area.
C = Located in operator's right console area.
D = Located in relay panel area.
E = Located in dash area.
F = Located under cab floor plate.
Component Location
Connectors
Machine
Location
Schematic
Location
CONN. 1 A-9 1
CONN. 2 F-9 D
CONN 3 F-9 D
CONN4 G-9 D
CONN5 G-9 D
CONN 6 Service Connector H-8 D
CONN 7 G-8 D
CONN8 G-8 D
CONN9 G-8 D
CONN 10 F-8 D
CONN 11 A-6 12
CONN12 C-6 22
CONN13 C-6 22
CONN14 C-5 F
CONN 15 C-5 F
CONN 16 C-5 F
CONN17 F-5 C
CONN18 F-5 C
CONN19 F-5 C
CONN 20 F-5 C
CONN 21 F-5 C
CONN 22 F-4 C
CONN 23 F-4 C
CONN 24 G-6 F
CONN 25 G-6 F
CONN 26 G-5 F
CONN 27 H-6 18
CONN 28 H-5 18
CONN 29 H-4 B
CONN 30 H-4 B
CONN 31 H-4 B
CONN 32 I-3 B
CONN 33 H-3 B
CONN 34 H-3 B
CONN 35 H-3 B
CONN36 A-4 6
CONN 37 A-4 6
CONN 38 A-4 6
CONN 39 B-3 6
CONN 40 B-3 7
CONN 41 B-2 25
CONN 42 C-2 F
CONN 43 C-2 F
CONN 44 C-2 F
Connector Location¹
1 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 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 break 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 too low (below 23 volts).
420D Electric power supply is too high (above 32 volts).
420E Engine speed dial is not one of the specified 10.
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
Component Part No. Resistance (Ohms) 1
Resistor - Backup 102-8016 47.0± 2.35
Resistor - Timer Relay 7Y-8242 47.0 ± 4.7
Solenoid - A/C Clutch 3E-1906 17.6± 0.6
Solenoid - Engine/Pump Control
Flow Control
111-9916 11.7± 1.2
Solenoid - Engine Shutdown 8C-3663
Start (Latch) Coil - 1.55 ± 0.15
Stop (Unlatch) Coil - 10.3 ± 1.03
Solenoid - Fine Swing 107-7056 34.0 ± 0.5
Solenoid - A/C 1
A/C 2
Hydraulic Lock
Swing Brake
Travel Speed
121-1491 32.0 ± 3.2
Solenoid - Level Finish
Trenching
121-1490 32.0 ± 3.2
Solenoid - Start Aid 3E-6332 6
¹ At room temperature
Resistor and Solenoid Specifications
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 of 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
114-5333 A/C High/Low Pressure
275 to 1750 kpa¹
(40 to 255 psi)
_
--
Normally Open²
131-9203 Auxiliary Pressure
3500 kPa MAX
(507.6 psi)
3000± 150 kPa
(435.1 ± 21.8 psi)
A-B Normally Open
A-C Normally Closed
² Contact position at the contacts of the harness connector.
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 (25 psi).
Off Machine Switch Specifications
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
101 RD Bat (+) 592
BU DC/DC Converter Power Output
103 YL Aux Ckt A513
PK DC/DC Converter Memory Output
105 BR Key Sw A537
PK Seat Heater
107 WH Eng Shutdown A571
PU Aux Ckt 1
108 BU Aux Ckt A572
PK Aux Ckt 2
109 OR Alt Output (+) Term A579
OR Wiper Motor (+)
111 YL Aux Ckt A580
BR Wiper Motor (-)
112 PU Main Power Rly Output A581 GN
Wiper Motor Raise
113 OR Opr Mon Panel B (+) Switched A582 PU
Wiper Motor Stop
114 GN Warning Horn (Forward) A583 YL
Pwr Window Interlock to Wiper Cont
115 PK Aux Ckt A584
BU Front Window Limit Sw to Wiper Cont
118 GY Aux Ckt A586
OR Wiper Sw to Wiper Cont
120 YL Aux Ckt A587
YL Pwr Window Cont to Safety Sol Relay
123 WH Aux Ckt A588
GN Safety Sol Relay to Sol
124 GN A/C A589
OR Power Window Up
129 BU Aux Ckt A590
BU Power Window Down
135 BU Aux Ckt A591
PU Rear Window Limit Sw
140 BU Aux Ckt C513
OR Blower Motor (Med-Low)
147 PU Aux Ckt C514
PK Power to Control (12 V)
149 PU Aux Ckt C515
BR Serial Communication (A)
150 OR Bat (+) C516
GY Serial Communication (B)
151 GN Aux Ckt C517
GN Ambient Temp Sensor
152 BU Aux Ckt C518
WH Cab Temp Sensor
154 WH Aux Ckt C519
OR Heater Coil Temp
168 GN Aux Ckt C520
PK Evaporator Coil Temp
172 GN Aux Ckt C521
PU A/C
176 OR Aux Ckt C523
BU A/C
177 OR Main Brkr C524
WH A/C
180 GN Aux Ckt C525
YL A/C
185 YL Aux Ckt C526
BR Blower Motor (Thermal Fuse)
189 WH Aux Ckt C536
PK Operator A/C On Lamp
191 WH Aux Ckt C537
GN A/C Photo Sensor (+) Sig
196 BU Aux Ckt C538
OR A/C Photo Sensor (-) Sig
C539 YL
A/C Control Sw IP1
200 BK Main Chassis C540 GY
A/C Control Sw IP2
201 BK Opr Mon Panel C541
GN A/C Control Sw IP3
235 BK Elec Pump Ctrl Gnd
A270 BK Operator Panel Sw Gnds 607
PK Flood Lamps - Front
615
YL Cab Flood Lamp
301 BU Starter No.1 Sol 616
BU Boom Flood Lamp
304 WH Starter Rly No.1 Output
306 GN Starter Rly Coil 763
BU Torque Converter Sw
307 OR Key Sw to Neut Start Sw 786 GN
Eng Speed Cont
308 YL Main Power Rly Coil 788 YL
Eng Speed (+)
309 GY Alt Regulator Term 791
PK Eng Speed Cont
310 PU Start Aid Sw to Start Aid Sol A718 PU
Start Aid Coolant Sensor Sig
311 WH Start Aid Sol to Temp Sw A755 PK
Throttle Sw #1
320 OR Horn Rly Coil to Sw A756 BU
Throttle Sw #2
321 BR Travel Alarm Lamp A757
GY Throttle Sw #3
322 GY Warning Horn (Forward) A758 BR
Throttle Sw #4
323 WH Fuel Pump Power A761
PU Elec Pump Cont Gov Feedback
325 PK Fuel Pump Rly A762
PU Elec Pump Cont Eng Speed Ground
326 PU Key Sw "C" Term A768
BU Pump Control Valve #1 (+)
329 YL Fuel Pump to Sw A769
GY Pump Control Valve #2 (-)
365 YL Fuel Pump Rly to Switch A770 PK
Elec Pump Control Bypass Sw
386 PK Air Shutoff Sol Enable A771 PU
Float Sw
F771 OR
Backup Sw
403 GN Alternator (R) Term F772 WH
Backup Sw
405 GY Opr Mon Oil Press F773 OR
Governor Accel
412 BU Opr Mon Cool Flow F774
WH Governor Decel
430 BU Opr Mon Air Filter 877 YL
Glow Plug Magnetic Sw to Glow Plug
487 OR Hyd Oil Flow Sw 950
BR Hammer Sw C
491 PK Hyd Oil Temp Sensor 951
PK Hammer Sol C
492 GY Coolant Temp Sensor 954 GN
Hammer Sw A
495 GN Fuel Level K903 BR
Dual HP Relay to Controller
496 WH Opr Mon Panel Hyd Oil Level K904
GN Pump Discharge - Signal
A495 GY Alternator (R) Terminal #2 K905 BU
Pump Discharge - (+) B
C468 BU Engine Oil Level K906 GN
Swing Brake Sol - Signal
K907
BU Swing Brake Sol -(+) B
501 GN Wiper - Front K909 BU
Backup Sw - (+) B
506 PU Washer - Front K911 PK
E/P Controller - RS485 (+)
508 PU Radio Speaker - Left K912
GN E/P Controller - RS485 (-)
509 WH Radio Speaker - Left (Common) K915
GN Fine Swing Sw - E/P Controller
511 BR Radio Speaker - Right K997 BU
(+) V Sensor
512 GN Radio Speaker - Right (Common) L908 OR Controller RS-232C TX
513 OR A/C Compressor/Refrigerant Press Sw L909 BU
Controller RS-232C RX
519 PK Thermostat to Refrigerant Press Sw L968 OR Elec Pump Control PS Valve (-)
546 BU Aux Hyd - Rotate CW
L969 WH Elec Pump Control PS Valve (+)
547 OR Aux Hyd - Rotate CCW
L970 GY Elec Pump Control to Switch Return
548 GY Aux Hyd - Open L971 GN Elec Pump Control to Travel Pressure Sw
549 PK Aux Hyd - Close L972 BU Low Idle Sw
575 YL Wiper - Aux L973 GN Fine Swing Cont Relay to Sol Valve
576 PK Wiper - Aux L974 GN Elec Pump Cont Boom Raise Press Sw
578 BU Washer - Aux L975 PK Start Aid Cont Lamp 1 Output
586 BR Aux Hyd - Close L976 GN Excavator Fuel Pump Switch
590 GY Wiper Sw to Intermittent Module L977 YL Trenching Sol
L978 GY Level Finish Sol
Monitoring Circuits
Accessory Circuits
WIRE DESCRIPTION CHART
Power Distribution Circuits
Accessory Circuits (cont'd)
Control Circuits
Lighting Sircuits
Ground Circuits
Basic Machine Circuits
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.
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
22
23
24
25
7
F
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
22
23
24
25
7
F
D66807
Machine Harness Connector And Component Locations
200-BK-18
K906-GN-18
200-BK-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
L971-GN-18
A771-PU-18
L974-GN-18
200-BK-18
200-BK-18
200-BK-18 2
1
BOOM RAISE
PRESS SW
106-0180
1
2
B
B
2
1
B
IMPLEMENT
PRESS SW
106-0179
TRAVEL
PRESS SW
106-0179
K976-OR-18
K975-WH-18
K974-PU-18
K973-BR-18
A755-PK-18
A756-PU-18
A757-WH-18
A758-BR-18
546-BU-18
548-GY-18
549-PK-18
547-OR-18
952-OR-18
191-WH
961-BR-18
A849-OR-18
A850-WH-18
951-PK-18
950-BR-18
A847-YL-18
A848-PK-18
954-GN-18
585-YL-18
200-BK
2
5
22
16
10
4
21
15
9
3
24
20
19
6
MEDIUM PRESS SOL R2
18
11
17
23
12
1
7
8
13
14
THROTTLE POS SW
NN
E/P CONTR
E/P CONTR
E/P CONTR
E/P CONTR
THROTTLE POS SW
AUX PILOT MAN AC1
FLOW CONTROL SOL
RH - JOYSTICK
GROUND
AUX PILOT MAN AC2
PROX SW
MEDIUM PRESS SOL R1
LH - JOYSTICK
LH - JOYSTICK
HAMMER 2 SPEED SOL
FLOW CONTROL SOL
ROCKER SW CSL
RH - JOYSTICK
PRESSURE SW
AUX CKT POWER SUPPLY
THROTTLE POS SW
THROTTLE POS SW
SWING
BRAKE SOL
121-1491
1
2
B
147-PU-18
149-PU
140-BU
105-RD
107-RD
114-RD-18
147-PU-18
200-BK-18
306-GN-18
2
1
A718-PU-18
386-PK-18
309-GY-18
616-BU
322-GY-18
607-PK-18
306-GN-18
304-WH-8
877-YL-4
101-RD-4
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
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
519-PK-18
321-BR-18
412-BU-18
487-OR-18
310-PU-18
107-RD
103-RD-18
168-RD-14
140-BU
200-BK
112-PU-6
196-BU
K909-BU-18
A587-YL-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
786-GN-18
149-PU
320-OR-18
114-RD-18
A770-PK-18
200-BK
140-BU
149-PU
147-PU-18
105-RD
107-RD
114-RD-18
191-WH-14
115-PK-14
120-YL
118-GY
124-GN-14
129-BU-18
103-RD-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
586-BR-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
575-YL-18
152-BU-18
576-PK-18
107-RD
196-BU
320-OR-18
151-GN-18
129-BU-18
118-GY
512-GN-18
511-BR-18
509-WH-18
508-PU-18
519-PK-18
124-GN-18
113-OR-18
185-YL-18
105-RD
519-PK-18
124-GN-18
124-GN-18
124-GN-14
124-GN-14
113-OR-18
185-YL-18
105-RD
129-BU-18
118-GY
124-GN-14
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
576-PK-18
575-YL-18
578-BU-18
124-GN-18
K915-GN-18
586-BR-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
200-BK
403-GN-18
200-BK
200-BK
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
200-BK-18
A847-YL-18
A848-PK-18
951-PK-18
147-PU-18
140-BU
149-PU
168-RD-14
114-RD-18
151-GN-18
320-OR-18
954-GN-18
196-BU
107-RD
112-PU-6
114-RD-18
168-RD-14
112-PU-14
112-PU-14
112-PU-14
200-BK-18
200-BK-18
147-PU-18
200-BK-18
140-BU
149-PU
2
168-RD-14
114-RD-18
151-GN-18
320-OR-18
3
200-BK-14
196-BU
107-RD
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
1
L970-GY-18
A755-PK-18
961-BR-18
191-WH-14
A587-YL-18
198-PK-18
546-BU-18
547-OR-18
548-GY-18
549-PK-18
A756-PU-18
A757-WH-18
A758-BR-18
1
JJ
A
2
3
4
1
4
5
6
7
8
9
10
11
JJ
FLOW CONT
12V SW OUT
172-GN-18
185-YL18
GND
196-BU
LIGHT IN (DC24V)
8
7
6
5
4
3
2
151-GN-18
1
200-BK
+24V BAT IN MEM
LIGHT OUT (DC12V)
+12V MEM OUT
+24V SW IN
GND
200-BK-18
320-OR-18
120-YL
200-BK
615-YL-18
K909-BU-18
196-BU
A587-YL-18
A588-GN-18
135-BU
151-GN-18
210-BK
308-YL-18
307-OR-18
139-OR-18
791-PK-18
615-YL
633-BU-18
RELAY PANEL
786-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
103-BU
200-BK-18
168-RD-12
309-GY-18
308-YL-18
A718-PU-18
616-BU
149-PU
786-GN-18
322-GY-18
320-OR-18
196-BU
A587-YL-18
A588-GN-18
A
151-GN-18
200-BK-18
200-BK-18
200-BK-18
607-PK-18
615-YL
A
791-PK-18
A770-PK-18
JJ
200-BK-18
200-BK-18
149-PU
200-BK-18
K909-BU-18
307-OR-18
12
386-PK-18
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
4
306-GN-18
K976-OR-18
306-GN-18
308-YL-18
MM
200-BK-18
306-GN-18
200-BK-18
10A
HORN
200-BK-18
K909-BU-18
A770-PK-18
791-PK-18
A
615-YL
607-PK-18
200-BK-18
151-GN-18
A588-GN-18
A587-YL-18
196-BU
320-OR-18
DOME LAMP
322-GY-18
786-GN-18
149-PU
616-BU
KEY SW
A718-PU-18
REFUEL. PUMP
BOOM LAMP
FINE SWING
306-GN-18
310-PU-18
200-BK-18
308-YL-18
10A
10A
30A
10A
10A
10A
308-YL-18
A770-PK-18
K909-BU-18
10A
615-YL
607-PK-18
791-PK-18
115-PK-18
115-PK-18
151-GN-18
200-BK-18
200-BK-18
103-RD
SHUTDOWN
A588-GN-18
616-BU
149-PU-18
149-PU-18
149-PU
322-GY-18
320-OR-18
LUBRICATOR
8
6
7
111-RD-14
4
2
5
308-YL-18
1
3
K909-BU-18
307-OR-18
200-BK-18
J
J
200-BK-18
386-PK-18
386-PK-18
112-PU-14
200-BK-18
S
CONVERTER
1310327
12V 7A
K975-WH-18
112-PU-14
112-PU-14
K974-PU-18
K973-BR-18
3
149-PU
2
140-BU
L53
L52
200-BK-18
200-BK
200-BK-14
PROX SW
3T-3132
AC2
(ON/OFF)
121-1491
SOL
R1/R2
125-8075
103-RD-18
AUX PRESS
SW
131-9203
147-PU-18
951-PK-18
200-BK-18
NN
HAMMER 2
SOL (ON/OFF)
116-3413
200-BK-14
200-BK-14
A
H
2
549-PK-18
H
G
I
403-GN-18
2
1
112-PU-14
1
548-GY-18
547-OR-18
546-BU-18
191-WH-14
961-BR-18
L970-GY-18
200-BK-14
151-GN-18
L970-GY-18
112-PU-14
185-YL-18
200-BK-14
952-OR-18
JJ
112-PU-14
112-PU-14
112-PU-14
200-BK-18
311-WH-18
NN
8
7
6
5
4
3
2
1
1
2
311-WH-18
310-PU-18
JJ
JJ
ATCH-FOOT
SWITCH
PEDAL-RH
ATCH-FOOT
SWITCH
PEDAL-LH
1
2
3
4
5
6
7
8
JJ
NN
A758-BR-18
A757-WH-18
A756-PU-18
A755-PK-18
K973-BR-18
K974-PU-18
K975-WH-18
K976-OR-18
B
NN
954-GN-18
C
1
2
2
1
200-BK-18
585-YL-18
200-BK-18
A848-PK-18
A847-YL-18
NN
200-BK-18
NN
NN
PP
AC1
(ON/OFF)
121-1491
PP
A849-OR-18
1
2
NN
1
2
950-BR-18
200-BK-18
A850-WH-18
200-BK-18
L970-GY-18
C
NN
B
A
196-BU
140-BU
107-RD
114-RD-18
105-RD
168-RD-14
149-PU
191-WH-14
129-BU-18
C468-BU-18
118-GY
124-GN-14
120-YL
11
12
1
2
3
4
5
6
7
8
9
10
1
2
321-BR-18
J
A
3
7
200-BK-18
9
1
11
5
A761-PU-18
BK
WH
8
9
6
5
12
11
J
A
4
10
10
2
9
8
12
7
6
11
1
5
2
1
4
3
2
1
200-BK-18
6
1
2
3
5
4
A
J
F773-OR-18
F774-WH-18
200-BK-18
3
7
200-BK-18
ATCH AUX SWATCH AUX SW
549-PK-18
198-PK-18
12
122-4828
RIGHT SW
548-GY-18
11
ATCH START AID
COOLANT TEMP SW.
3E-6449
2
1
B
ATCH START
AID SOL
3E-6332
T °
132-5096
586-BR-18
191-WH
A424-WH-18
6
1
3
5
AIH COOLANT
TEMP SENSOR
125-4812
1
B
2
1
GROUND
ON(KEY)1
2
AIR CLEANER SW
109-9330
2
7
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUND
+B
BK-18
BR-18
YL-18
B
C
AIR HEATER
107-9652
8
9
4
T °
B
J
GND
F/B
+B
ACCEL
B B
B
BK-00
C
2
1
DECEL
6
A
B
B
MOTOR AS
GOV
132-7778
AA
HH
B
C
B
BB
C
C
C
C
C
KEY
198-PK-18
REFRIGERANT
LOW PRESS SW
114-5333(NOTE A)
ALTERNATOR
9W-3043
ATCH AUTO
LUBRICATION PUMP
127-5264
ATCH
TRAVEL ALARM
3E-7738
ENG OIL
LEVEL SW
111-4759
1
2
2
2
1
B
B
COOLANT
LEVEL SW
096-0744
1
2
T °
COOLANT TEMP
SENSOR
4I-5394
MOTOR
C
B
BATMTR
SG
B
STARTER
MOTOR
104-7040
B-
WASHER
7T-8890
2
1
ENG
SHUTDOWN SOL
8C-3663
ENG OIL
PRESS SW
3E-6455
CHASSIS
BK-18
RD-18
ENG SPEED
PICKUP
6V-2455
9
549-PK-18
8
7
11
3
6
MM
BATTERY
3T-5760
POS
NEGNEG
POS
A
C
B
A
BU-18
B+
RD
ALT
A/C CLUTCH
SOL
3E-1906
MOTOR
ATCH
BATTERY
3T-5760
(NOTE C)
548-GY-18
198-PK-18
200-BK-18
K904-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
A769-GY-18
A768-BU-18
320-OR-18
763-BU-18
200-BK-18
200-BK-18
200-BK-18
10
1
308-YL-18
114-RD-18
308-YL-18
A768-BU-18
A769-GY-18
308-YL-18
307-OR-18
101-RD-4
304-WH-8
547-OR-18
311-WH-18
403-GN-18
113-OR-18
309-GY-18
492-GY-18
A718-PU-18
877-YL-4
A762-PU-18
788-YL-18
405-GY-18
198-PK-18
F774-WH-18
F773-OR-18
A761-PU-18
546-BU-18
C468-BU-18
198-PK-18
113-OR-18
113-OR-18
200-BK
A587-YL-18
A770-PK-18
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
B
405-GY-18
788-YL-18
A762-PU-18
200-BK-18
304-WH-8
RD-00
RD-00
200-BK-4
200-BK-6200-BK-10
200-BK-18
200-BK-18
200-BK-18200-BK-18
200-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
308-YL-18
200-BK-18
K909-BU-18
1
2
B
6
101-RD-4
A
308-YL-18
308-YL-18
112-PU-6
H
2
3
A587-YL-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
114-RD-18
A770-PK-18
K909-BU-18
196-BU
AE 132-1827 A-4
200-BK
113-OR-18
POS
NEG NEG
POS
4
2
3
1
113-OR-18
L17
ATCH-AUX CKT
ATCH-AUX CKT
200-BK-14
519-PK-18
124-GN-14
K909-BU-18
308-YL-18
M M
F
E
D
F
C
B
A
200-BK
615-YL
J
200-BK-18
Y/G
Y/W
4
9 8 7
9 8 7
6 5 4
6 5 4
3 2
1
F
E
D
3 2
1
C
B
A
BK-00
304-WH-8
308-YL-18
A718-PU-18
386-PK-18
309-GY-18
616-BU
322-GY-18
607-PK-18
DISCONNECT SW.
7N-0718
7N-0719(NOTE C)
ALT BREAKER
9S-0174
OUT 1
+B
IN 2
IN 1
GND
OUT 2
UU
ZZ
YY
LL
C538-OR-18
YY
UU
VV
XX
WW
5
4
6
3
1
2
BACKUP
RESISTOR
102-8016
12
1
HYD LOCK SOL RELAY
111-4871
5
3
4
6
2
1
7
8
9
10
11
12
200-BK-18
FOR
INSP LAMP
8
2
10
11
3
4
9
TIMER RELAY
111-4870
7
MAIN RELAY
3T-0376
CAB/CHASSIS LAMP RELAY
111-4871
6
578-BU-18
XX
5
4
5
60A
NEUTRAL
START RELAY
111-4871
200-BK-18
200-BK-18
A
START RELAY
125-1302
6
3
12
2
1
7
11
8
9
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
10
200-BK-18
1
AUX. CKT
DIODE
121-1022
DIODE
121-1022
ATCH
LL KK
200-BK-18
NOTE F : NOT USE WITH FINE SWING CONT. SW.
2
2
1
2
KEY SW.(ON)
1
3
2
4
HEATER
CONT UNIT
104-3204
HEATER
RELAY
116-0114
RESISTOR
7Y-8242
KK
ZZ
CHECK TERM.
RELAY
KEY SW.(START)
GND
INDICATOR
REGULATOR
TEMP.
168-RD-18
5
4
PP 133-0958 I-6
MM 111-4846 I-3
177-RD-8
6V-5821
(NOTE C)
177-RD-8
200-BK-18
177-RD-8
K905-RD-14
109-RD-6
147-PU-18
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
L971-GN-18
L977-YL-18
L978-GY-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
132-7765
L971-GN-18
L970-GY-18
L977-YL-18
L974-GN-18
L969-WH-18
1
200-BK
L909-BU-18
L908-OR-18
235-BK-18
506-PU
L972-BU-18
L970-GY-18
L971-GN-18
L978-GY-18
L975-PK-18
763-BU-18
L977-YL-18
L974-GN-18
L978-GY-18
L969-WH-18
L968-OR-18
L972-BU-18
L977-YL-18
495-GN-18
306-GN-18
200-BK-18
306-GN-18
306-GN-18
200-BK-18
615-YL-18
306-GN-18
200-BK-18
AD 128-8936 I-8
NOTE H : USE WITH A/C UNIT
365-YL-18
306-GN-18
177-RD-14
177-RD-14
177-RD-14
1
4
3
2
177-RD-14
177-RD-14
177-RD-14
177-RD-14
306-GN-18
310-PU-18
325-PK-18
310-PU-18
310-PU-18
877-YL-4101-RD-4
177-RD-14
177-RD-6
177-RD-14
386-PK-18
A
A
A
A
326-RD
496-WH-18
A768-BU-18
200-BK-18
BK
YL
172-RD-18
B
BA
A
329-YL-18
115-PK-14
GG (NOTE C)
RD-00
RD-00
177-RD-14
B
HYD OIL
FILTER SW
116-3660
GROUND
SIGNAL
+B
C
B
A
177-RD-14
BB
B
BBBB
177-RD-14
177-RD-14
177-RD-14
177-RD-14 177-RD-14
177-RD-14
200-BK
578-BU-18
177-RD-14
177-RD-14
177-RD-14
177-RD-14
112-PU-6
FINE SWING
SOL
107-7056
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
AE
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
N
2
1
1
2
HYD OIL
TEMP SENDER
4I-5394
2
1
FUEL LEVEL
SENSOR
105-9911
ATCH
REFUELING SW
5C-6108
2
1
HYD OIL
LEVEL SW
111-4760
2
T °
1
B
C537-GN-18
VVAD
AD
329-YL-18
168-RD-14
177-RD-6
109-RD-6
101-RD-6
172-RD-18
196-BU
111-RD-14
168-RD-14
168-RD-10
308-YL-18
308-YL-18
12
101-RD-6
147-PU-18
101-RD-6
MAIN BREAKER
9S-0174
A
A
147-PU-18
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
A586-OR-18
ATCH
REFUELING
POWER RELAY
3T-0376
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
200-BK-14
615-YL
200-BK-18
112-PU-14
112-PU-14 180-GN
590-GY-18
103-RD-18
8
103-RD-18
509-WH-18
615-YL
511-BR-18
113-OR-18
129-BU-18
512-GN-18
615-YL
308-YL-18
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K915-GN-18
K907-BU-18
115-PK-14
200-BK
198-PK-18
120-YL
191-WH-14
200-BK-18
2
5
4
191-WH-18
1
6
3
1
10A
10A
15A
10A
10A
10A
A A
ENG GOV
15A
7
8
1
6
5
4
3
2
PLATFORM
CHASSIS
GROUND STRAP
7G-1060
308-YL-18
ANTENNA CABLE
111-4846
CAB/CHASSIS LAMP
WASHER/WIPER
H
A425-YL-18
H
CIGAR LIGHTER
A/C /HEATER
FUSE
10A 9W-1442
15A 9W-1441
30A 8T-9636
BACKUP
15A
10A
10A
10A
10A
10A
10A
15A
E/P CONT
HYD LOCK SOL
10A
2
AE
B
K976-OR-18
K975-WH-18
AUX CKT
AUX CKT
K974-PU-18
SW PANEL
K973-BR-18
A755-PK-18
A756-PU-18
A757-WH-18
A758-BR-18
546-BU-18
548-GY-18
549-PK-18
547-OR-18
952-OR-18
191-WH
6
8
1
7
4
5
3
2
HYD LOCK SW
961-BR-18
A849-OR-18
JJ
A850-WH-18
951-PK-18
J
J
FUSE BASE
111-4812
950-BR-18
A847-YL-18
A848-PK-18
954-GN-18
585-YL-18
200-BK
191-WH-18
954-GN-18
506-PU-18
952-OR-18
1
C
B
A
2
403-GN-18
1
152-BU
118-GY
112-PU-6
2
152-BU
NN
200-BK-14
506-PU
200-BK-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
A755-PK-18
763-BU-18
A756-BU-18
524-BU
A771-PU-18
306-GN-18
306-GN-18
A757-GY-18
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
118-GY
308-YL-18
L975-PK-18
200-BK-14
200-BK
NOTE C : USE WITH COLD WEATHER.
ZZ 111-4831 F-8
200-BK-14
524-BU
103-RD-18
200-BK
120-YL
139-OR-18
A
E
2
1
524-BU
129-BU-18
103-RD-18
403-GN-18
12
K997-BU-18
633-BU-18
508-PU-18
210-BK
135-BU
210-BK
135-BU
12V SOCKET
9R-7941
615-YL
615-YL
615-YL
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
K997-BU-18
103-RD-18
200-BK
103-RD-18
LUNCH BOX LIGHT
K912-GN-18
120-YL
524-BU
118-GY
139-OR-18
633-BU-18
615-YL
210-BK
135-BU
506-PU
524-BU
524-BU
590-GY-18
506-PU
501-GN-18
129-BU-18
403-GN-18
200-BK-18
235-BK-18
K997-BU-18
K997-BU-18
K997-BU-18
954-GN-18
152-BU
235-BK-18
K911-PK-18
K912-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
103-RD-18
615-YL-18
A586-OR-18
120-YL
139-OR-18
633-BU-18
210-BK
L909-BU-18
A586-OR-18
L908-OR-18
487-OR-18
135-BU
118-GY
K904-GN-18
K905-RD-18
325-PK-18
152-BU
235-BK-18
C537-GN-18
200-BK-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
C538-OR-18
103-RD-18
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 DIG)
RS485 - (PEDAL)
RS485 + (RADIO CONT)17
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO DIG)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18
308-YL-18
TRAVEL PRESS SW
HYD OIL FILTER INDICATOR
200-BK-18
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
ONE TOUCH 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
096-0721
2
3
4
5
6
1
8
7
37
4
3
1
16
19
5
12
32
33
14
11
34
ATCH SPEAKER(L)
7Y-5505
ATCH SPEAKER(R)
7Y-5505
7
8
9
10
1
11
7
6
5
4
3
8
1
2
5
4
3
2
1
6
F
F
F
F
F
E E
A
A A
6
5
4
3
2
L6
L7
ANTENNA
6C-3431
501-GN-18
177-RD-14
PLATFORM
A
1
6
2
5
3
4
2
3
4
5
6
1
8
7
BK-00
RD-00
RD-00
A
CHASSIS
DD
DD
GG
(NOTE C)
CC
BK-00
FF (NOTE C)
BB
EE (NOTE C)
AA
L15L15
B
BB
115-PK-14
154-RD-18
111-RD-14
150-RD-18
K997-BU-18
154-RD-18
111-RD-14
150-RD-18
BBB
N
B
3E-5136
A
A
L45
L50
RELAY PANEL
115-PK-14
114-RD-18
114-RD-18
114-RD-18
D
D
DA
A
A
L48
L47
114-RD-18
150-RD-18
154-RD-18
111-RD-14
150-RD-18
A495-GY-18
115-PK-14
115-PK-14
115-PK-14
A495-GY-18
A495-GY-18
150-RD-18
114-RD-18
154-RD-18
111-RD-14
K909-BU-18
306-GN-18
306-GN-18
150-RD-18
306-GN-18
K909-BU-18
786-GN-18
177-RD-14
196-BU
320-OR-18
114-RD-18
322-GY-18
L48
L47
L47
306-GN-18
A495-GY-18
111-RD-14
154-RD-18
154-RD-18
177-RD-14
111-RD-14
A495-GY-18
RELAY PANEL
L48
A
B
B
B
B
DB
L51
L45
L49
L51
L49
L50
L51
E
L45
L44
L42
L41
L29
L30
L30
L29
L41
L42
L44
D
L45
L30
L29
L41
L42
L44
4
3
5
323-WH-14
168-RD-18
168-RD-18
168-RD-18
168-RD-18
4
168-RD-18
5
200-BK-14
200-BK-18
168-RD-14
200-BK-14
200-BK-18
L976-GN-18
L976-GN-18
L976-GN-18
365-YL-18
168-RD-18
365-YL-18
C
140-BU
B
200-BK
200-BK
200-BK-18
200-BK-18
200-BK-18
321-BR-18
200-BK
140-BU
430-BU-18
412-BU-18
A
L909-BU-18
L908-OR-18
310-PU-18
311-WH-18
430-BU-18
200-BK-18
519-PK-18
519-PK-18
513-OR-18
519-PK-18
200-BK-18
412-BU-18
1
2
OR
PK
140-BU
200-BK
326-RD
235-BK-18
200-BK-18
200-BK
BLOCK
121-1023
CONSOL SW
SENSOR 2
GND
A850-WH-18
SENSOR 1
6
5
+ 24V
4
3
2
132-7315
A425-YL-18
A424-WH-18
A425-YL-18
A424-WH-18
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
LL 111-4832 F-8
HH 7Y-8298 A-8
GG 116-0242 H-8
FF 116-0080 H-8
EE 125-4767 A-8
DD 111-4881 I-8
CC 125-4727 I-8
BB 116-0080 I-8
AA 121-1046 A-8
CABLE AS.
VV 128-8937 F-8
WIRE AS.
R 128-8970 A-2
200-BK-18
586-BR-18
200-BK
191-WH
A849-OR-18
200-BK-14
200-BK-18
2
1
200-BK-18
1
N 116-0073 E-7
M 117-7028 G-1
K 111-4835 B-2
J 133-5388 H-3
H 130-6576 D-3
G 121-0986 A-1
F 136-8032 G-1
E 130-6568 D-1
D 135-9848 F-8
C 130-6572 A-9
B 131-5513 A-3
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
198-PK-18
191-WH
191-WH-14
585-YL-18
950-BR-18
HARNESS AS.
310-PU-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
495-GN-18
616-BU
322-GY-18
607-PK-18
168-RD-14
L45
496-WH-18
487-OR-18
491-PK-18
306-GN-18
386-PK-18
L977-YL-18
763-BU-18
L978-GY-18
A768-BU-18
A769-GY-18
K904-GN-18
K997-BU-18
200-BK
200-BK
200-BK-18
NOTE E : NOT NECESSARY FOR ELECTRIC OPENABLE
WINDSHIELD.
NOTE D : USE WITH ELECTRIC OPENABLE WINDSHIELD.
311-WH-18
172-RD-18
A761-PU-18
F773-OR-18
F774-WH-18
326-RD
405-GY-18
788-YL-18
A762-PU-18
C468-BU-18
101-RD-4
304-WH-8
403-GN-18
109-RD-6
309-GY-18
492-GY-18
A718-PU-18
877-YL-4
200-BK
200-BK
124-GN-18
311-WH-18
321-BR-18
519-PK-18
412-BU-18
430-BU-18
A537-PK-18
2
1
200-BK-18
310-PU-18
586-BR-18
L49
105-RD
576-PK-18
575-YL-18
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
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
306-GN-18
A718-PU-18
309-GY-18
616-BU
322-GY-18
607-PK-18
304-WH-8
877-YL-4
101-RD-4
109-RD-6
JJ 133-7295 G-6
KK 111-4833 F-8
152-BU
L973-GN-18
147-PU-18
961-GN-18
K909-BU-18
200-BK-18
200-BK-18
200-BK-18
495-GN-18
616-BU
322-GY-18
607-PK-18
168-RD-14
L18
495-GN-18
200-BK-18
616-BU
322-GY-18
607-PK-18
168-RD-14
A
J
200-BK-18
200-BK-18
200-BK-18
8
7
6
5
4
3
2
1
ATCH
SEAT WITH
SEAT HEATER
111-6458
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
NOTE B ; USE WITH SHORT BOOM.
200-BK-18
118-GY
118-GY
109-RD-6
877-YL-4
3
L43
L44
L15
B
CHASSIS
200-BK-18
326-RD
A537-PK-18
124-GN-18
C
EE
AA
L969-WH-18
L43
L43
K997-BU-18
B
CHASSIS
L28
200-BK-18
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
L30
L29
L41
L42
L42
L41
K905-RD-14
150-RD-18
150-RD-18
150-RD-18
150-RD-18
150-RD-18
154-RD-18
L40
200-BK-18
200-BK-18
L23
L15
191-WH-14
191-WH
615-YL-18
615-YL-18
200-BK-18
115-PK-14
K905-RD-14
150-RD-18
200-BK-18
154-RD-18
172-RD-18
B
L40
L39
R
YY 111-4830 F-8
615-YL-18
615-YL-18
575-YL-18
576-PK-18
578-BU-18
177-RD-14
L973-GN-18
152-BU-18
L39
200-BK-18
115-PK-14
200-BK-18
172-RD-18
200-BK-18
154-RD-18
150-RD-18
K907-BU-18
111-RD-14
K905-RD-14
200-BK-18
200-BK-18
615-YL-18
615-YL-18
L21
586-BR-18
L20
L19
200-BK-18
615-YL-18
200-BK-18
K909-BU-18
200-BK-18
L52
200-BK-18
L54
XX 111-4829 F-8
L54
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L7
L34
L20
L19
L3
L34
L25
L35
L20
L19
L3
L25
L4
L33
326-RD
326-RD
L21
L31
L9
L8
A
L12
L13
H
L13
L12
L11
L8
L9
L31
HH
L33
L33
L33
L33
K915-GN-18
L20
308-YL-18
L19
L3
L25
L4
L35
L31
L4
L25
L3
L19
L20
L3
L4
L19
L
2
0
L25
103-RD
L20
L25
L2
118-GY
K997-BU-18
K997-BU-18
K997-BU-18
118-GY
615-YL-18
615-YL-18
L27
L26
L35
L27
L26
L36
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
615-YL-18
A769-GY-18
T 116-0096 A-4
152-BU-18
615-YL-18
A768-BU-18
F
A
L6
L7
L30
K906-GN-18
L28
615-YL-18
185-YL-18
L29
L29
L28
AB
WW 128-8938 F-8
310-PU-18
615-YL-18
615-YL-18
168-RD-14
200-BK-18
120-YL
168-RD-14
H
ATCH START
AID SW
111-4784
168-RD-18
185-YL-18
L18
L3
L19
L21
L20
S
200-BK-18
ATCH AUX HYD
CONT SW
111-4787
H
L11
FINE
SWING CONT SW
111-4788
115-PK-14
961-GN-18
961-GN-18
HHH
132-1828
H
BACKUP
EPR VALVE SW
114-0421
H H
BACKUP
GOV SW
110-7884 ATCH SEAT
HEATER SW
111-4783
H
200-BK-14
120-YL
615-YL
189-RD-14
189-RD-14
189-RD
189-RD
189-RD
189-RD
189-RD
189-RD
189-RD
200-BK
200-BK
200-BK
C
L46
L46
S 136-4731 F-3
A 136-6469 C-2
6
5
3
8
1
7
2
4
B+ 12V
L35
L16
L22
L36
L24
L60
L60
L55
SIGN. OUT
L60
L16
L55
L36
A588-GN-18
LEFT SW
198-PK-18
198-PK-18
546-BU-18
524-BU
172-RD-18
109-RD-6
326-RD
172-RD-18
198-PK-18
189-RD-14
L39
L16
200-BK-18
616-BU
200-BK
200-BK-18
322-GY-18
546-BU-18
200-BK-14
RIGHT SW
200-BK-18
122-4829
112-PU-14
200-BK
386-PK-18
306-GN-18
491-PK-18
487-OR-18
496-WH-18
200-BK-18
112-PU-14
386-PK-18
111-RD-14
547-OR-18
306-GN-18
B
491-PK-18
200-BK-18
200-BK-18
200-BK-14
616-BU
200-BK-18
322-GY-18
322-GY-18
322-GY-18
200-BK-18
607-PK-18
320-OR-18
L46
200-BK-14
322-GY-18
200-BK-18168-RD-14
200-BK
200-BK-18
325-PK-18
200-BK-14
323-WH-14
365-YL-18
200-BK-18
616-BU-18
DIODE
121-1022
198-PK-18
LEFT SW
A758-BR-18
118-GY
115-PK-14
111-RD-14
L24
L16
L24
L36
F
L46
L46
U 116-0098 A-4
307-OR-18
L56
A757-GY-18
615-YL-18
A756-BU-18
L56
L36
L24
198-PK-18
547-OR-18
506-PU
A755-PK-18
MM
112-PU-14
CAB LAMP
5I-8250
152-BU
506-PU
L35
B
ATCH
AM/FM RADIO
A
L15
OPERATOR STATION
200-BK-14
L17
200-BK-18
210-BK
105-RD
A586-OR-18
L16
103-RD
103-RD
103-RD
177-RD-12
200-BK-18
633-BU-18
135-BU
210-BK
L56
139-OR-18
103-RD
103-RD
SIGN. IN
L23
L15
501-GN-18
A587-YL-18
191-WH
200-BK
235-BK-18
L909-BU-18
L908-OR-18
633-BU-18
L16
322-GY-18
150-RD-18
176-YL
L24
K912-GN-18
L14
616-BU
201-BK-18
L24
L55
200-BK-18
C
B
A
139-OR-18
103-RD-18
191-WH
L56
L53
308-YL-18
5
4
3
2
1
118-YL
524-BU
200-BK
L55
L53
154-RD-18
189-RD
172-RD-18
L22
198-PK-18
CONVERTER
K905-RD-14
548-GY-18
549-PK-18
L22
111-RD-14
150-RD-18
129-BU-18
616-BU-18
200-BK-18
L56
151-GN-18
308-YL-18
575-YL-18
ATCH-AUX/HYD
CONTROLLER
122-9897
576-PK-18
152-BU-18
I
198-PK-18
200-BK-18
519-PK-18
198-PK-18
198-PK-18
198-PK-18
546-BU-18
198-PK-18
547-OR-18
A587-YL-18
633-BU-18
508-PU-18
512-GN-18
509-WH-18
511-BR-18
210-BK
139-OR-18
135-BU
10
191-WH-14
L976-GN-18
191-WH-14
MEMORY +12V
200-BK-18
GROUND
SPEAKER RH+
SPEAKER LH-
SPEAKER RH-
SPEAKER LH+
+12V LIGHT
135-BU
139-OR-18
210-BK
511-BR-18
509-WH-18
512-GN-18
508-PU-18
L53
L52
L56
L52
L52
GND IN
WASH SW
+ 24 IN
MOT WASH
135-BU
WIPER SW
L23
L53
OUTPUTS
INTER SW
200-BK
118-GY
200-BK-18
524-BU
C
B
OPERATOR STATION
200-BK-18
607-PK-18
WIND SW
L976-GN-18
150-RD-18
L23
L55
154-RD-18
L56
S
–
A/C UNIT
126-3375
506-PU
200-BK-14
+
103-RD
K911-PK-18
590-GY-18
4
2
633-BU-18
200-BK-18
403-GN-18
6
9
3
129-BU-18
C538-OR-18
C537-GN-18
4
500-BR-18
200-BK-14
200-BK-18
201-BK-18
200-BK-18
A755-PK-18
A756-BU-18
A
615-YL-18
7
200-BK-14
L36
L16
L16
200-BK-18
616-BU-18
615-YL
200-BK
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
A757-GY-18
A758-BR-18
3
1
6
A
154-RD-18
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
200-BK
L969-WH-18
L968-OR-18
B
325-PK-18
INSP LAMP
2
AC
4
1
K907-BU-18
F772-WH-18
F771-OR-18
K915-GN-18
L53
L4
L52
2
L24
1
1
2
189-RD
103-RD-18
172-RD-18
508-PU-18
509-WH-18
L21
3
L20
L5
L11
L12
H
L7
L6
L6
E
CAB
U U
ATCH
REFUELING
START RELAY
111-4871
J
PLATFORM
A
F
E
E
+
H
ONE TOUCH
LOW IDLE SW
120-YL
R
L19
ATCH AUX SW
U
AUX CKT
HYD
LOCK SOL
121-1491
L17
L15
L14
+B
L. CHASSIS
L. BOOM
306-GN-18
WASH
W. LOW
W. INT
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
1
8
5
2
511-BR-18
200-BK
524-BU
500-BR-18
L972-BU-18
308-YL-18
UPPER WIPER MOTOR
131-0399
WIPER CONT
127-9838
NEUTRAL START
LIMIT SW
111-4799
HORN SW
128-2134
118-YL
L15
L975-PK-18
AC
K997-BU-18
326-RD
L20
L21
L19
L3
524-BU
A
L20
L21
L19
L3
L18
L3
L18
AC
B
326-RD
L13
L13
L12
L11
L13
L12
L11
L9
L8
L9
L8
E
K997-BU-18
K905-RD-18
K905-RD-18
L1
A
A
E
L6
L7
AC 121-1048 A-2
B
L3
512-GN-18
L4
L1
WINDSHIELD SW
9G-2795 (NOTE E)
K905-RD-18
320-OR-18
F
AC
ATCH
BOOM LAMP
5I-8250
K905-RD-14
CHASSIS
OPERATOR STATION
S4
S3
S2
S1
COM
G (NOTE B)
AB 121-1044 A-6
177-RD-14
ATCH
REFUELING PUMP
108-9845
ATCH
REFUELING
START SW(NO)
6T-9442
T
R
R
HORN
7T-0970
MM
NN 134-6390 I-6
200-BK-14
R
G (NOTE B)
K
K
+
-
1
2
ATCH
REFUELING
STOP RELAY
111-4871
L976-GN-18
H
R
MONITOR
106-0172
R
SWITCH PANEL
111-4800
KEY SW
9G-7641
H
TT
ATCH
REFUELING
STOP SW(NC)
9X-4184
168-RD-18
L2
A/C PHOTO
SENSOR
128-2162
(NOTE H)
L3
200-BK
C
LOWER WIPER MOTOR
131-0398
+
-
L2
UU 111-4826 F-8
S
B
–
MOTOR
SERVICE
METER
6T-7337
CHASSIS
LAMP
5I-8251
THROTTLE
POS SW
106-0107
ATCH
BOOM LAMP
5I-8250
MOTOR
EE
E
R
C
S
B
E
A
OFF
ON
ST
NOTE A : NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
CIGAR
LIGHTER
9W-0335
1
2
2
1
L7
HORN
7T-0969
L6
TO MACHINE STRUCTURE
D63363
OVERLOAD WARNING
DEVICE SENSOR
OVERLOAD WARNING
DEVICE CONTROL
ATCH OVERLOAD
WARNING DEVICE SW
MULTISWITCH JOYSTICK
MULTISWITCH JOYSTICK
111-9916
FLOW CONTROL
SOL (PROP)
PRESSURE SW
106-0179
THIS SCHEMATIC IS FOR THE 325B-HYD EXCAVATOR.
(116-0177 CHANGE V 00)
SERVICE
CONNECTOR
CONN 1
CONN 11
CONN 12
CONN 13
CONN 14
CONN 15
CONN 16
CO
NN 36
CO
NN 37
CO
NN 38
CO
NN 39
CO
NN 40
CO
NN 41
CO
NN 42
CO
NN 43
CO
NN 44
CONN 17
CONN 18
CONN 19
CONN 20
CONN 21
CONN 22
CONN 23
CONN 24
CONN 25
CONN 26
CONN 28
CONN 29
CONN 30
CONN 31
CONN 33
CONN 27
CONN 34
CONN 35
CONN 32
CONN 2
CONN 10
CONN 3
CONN 4
CONN 5
CONN 6
CONN 7
CONN 8
CONN 9
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. (EMS)
PANEL LAMP CIRCUIT.
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
TURN SIGNAL CIRCUIT.
ENGINE SHUTDOWN CONTROL CIRCUIT.
START AID CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
