325B L EXCAVATOR ELECTRICAL SCHEMATIC AURORA USED IN SERVICE MANUAL SENR8955

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 Temperature 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 - 1 2VDC I-8,H-8 5 Sensor - Sun Load F-1 E
Breaker - Alternator I-8 D Solenoid - A/C Clutch C-9 15
Breaker - Main I-8 D Solenoid - Eng/Pump Control A-7 16
Control - Engine/Pump F-2 C Solenoid - Engine Shutdown B-9 17
Controller - Wiper/Washer E-1 A Solenoid - Fine Swing E-7 18
Converter - Voltage C-5 A Solenoid - Hydraulic Lock I-1 A
Diode G-7 D Solenoid - Level Finish A-7 16
Diode - Main Relay G-7 D Solenoid - Start Aid H-9 19
Fuses I-4,5,6 B 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-8 18
Ground - Relay Panel G-7 D Switch - Coolant Level H-9 19
Ground Strap - Chassis to Platform I-6 10 Switch - Disconnect I-8 D
Horn A-2 7 Switch - Engine Oil Level A-8 1
Lighter E-1 E Switch - Engine Oil Press B-9 15
Meter - Service F-1 E Switch - Fine Swing Control D-4 C
Monitor F-1 E Switch - Horn I-1 B
Motor - Lower Washer I-9 0 Switch - Hydraulic Control D-4 C
Motor - Lower Wiper H-1 9 Switch - Hydraulic Oil Filter A-5 12
Motor - Starter A-9 8 Switch - Hydraulic Oil Level A-5 12
Motor - Upper Washer I-9 D Switch - Implement Pressure D-8 18
Motor - Upper Wiper C-5 6 Switch - Key F-3 C
Pickup - Engine Speed B-9 11 Switch - Lower Washer D-4 C
Radio - 12VDC C-8,I-3 A Switch - Lower Wiper D-3 C
Relay - Boom Lamp I-7 D Switch - Neutral Start Limit I-1 B
Relay - Cab/Chassis Lamp I-7 D Switch - One Touch Low Idle F-2 C
Relay - Heater F-7 D Switch - Refrigerant Low Press C-9 15
Relay - Horn I-7 D Switch - Start Aid D-5 C
Relay - Hydraulic Lock Solenoid I-7 D Switch - Start Aid Coolant Temp B-9 4
Relay - Main G-7 D Switch - Suction Line Shutoff Limit A-6 12
Relay - Neutral Start F-7 D Switch - Throttle Position E-3 C
Relay - Start F-8 D Switch - Travel Pressure D-8 18
Relay - Timer E-7 D Switch Panel F-2 C
Resistor - Backup I-8 D Unit - A/C, Heater G-5 21
Resistor - Timer Relay E-7 D Unit - Air Inlet Heater Control I-7 D
Machine locations are repeated for components located close together.
A = Components in operator’s compartment.
B = Components in operator’s left console.
C = Components in operator’s right console.
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 A
CONN 11 C-5 A
CONN 12 C-5 A
CONN 13 C-4 A
CONN 14 F-5 C
CONN 15 F-5 C
CONN 16 F-5 C
CONN 17 F-5 C
CONN 18 F-4 C
CONN 19 F-4 C
CONN 20 F-4 C
CONN 21 F-4 C
CONN 22 H-5 B
CONN 23 H-5 B
CONN 24 H-4 B
CONN 25 H-4 B
CONN 26 H-4 B
CONN 27 H-4 B
CONN 28 H-3 B
CONN 29 H-3 B
CONN 30 C-3 A
CONN 31 B-3 7
CONN 32 A-3 13
CONN 33 B-2 7
CONN 34 SIS Connector D-2 C
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.
D = Components on relay panel.
E = Components in dash.
Related Electrical Service Manuals
Form Number
Alternator: (9W-3043)
SENR4252
Engine/Pump Control
SENR9291
Starting And Charging
SENR9292
Consist: 6V-5720
Consist: 106-8557
SENR3581
SEN R3859
Title
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
102-8016 Resistor - Backup 47.0 ± 2.35
7Y-8242 Resistor - Timer Relay 47.0 ± 4.7
134-3998 Solenoid - A/C Clutch 17.6 ± 0.6
8C-3663 Solenoid - Engine Shutdown
Start (Latch) Coil - 1.55± 0.15
Stop (Unlatch) Coil - 10.3 ± 1.03
107-7056 Solenoid - Fine Swing 34.0 ± 0.5
121 -1491
Solenoid - Hydraulic Lock
Swing Brake
Travel Speed
32.0 ± 3.2
121-1490
Solenoid - Level Finish
Trenching
32.0 ± 3.2
3E-6332 Solenoid - Start Aid 6.0
¹ At room temperature unless otherwise noted.
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
Boom Raise PressureI
mplement Pressure
Travel Pressure
1225.00 ± 98.00 kPa
(177.67 ± 14.21 psi)
882.00 kPa MIN
(127.92 psi MIN)
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
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).
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Accessory Circuits (Continued)
101 RD BAT(+) 513 OR A/C COMPRESSOR/REFRIGERANT
PRESS. SW
103 YL AUX CKT 519 PK
THERMOSTAT TO REFRIGERANT
PRESS. SW
105 BR KEY SW 546 BU AUX HYD - ROTATE CW
107 WH ENG SHUTDOWN 547 OR AUX HYD - ROTATE CCW
108 BU AUX CKT 548 GY AUX HYD - OPEN
109 OR ALT OUTPUT (+) TERM. 549 PK AUX HYD - CLOSE
111 YL AUX CKT 576 PK WIPER - AUX (LO)
112 PU MAIN POWER RLY 578 BU WASHER - AUX
113 OR OPR MON PANEL B (+) SWITCHED 590 GY WIPER SW TO INTERMITTENT MODULE
114 GN WARNING HORN (FORWARD) 592 BU DC/DC CONVERTER POWER OUTPUT
115 PK AUX CKT A513 PK DC/DC CONVERTER MEMORY OUTPUT
118 GY AUX CKT A571 PU AUX CKT 1
120 YL AUX CKT A572 PK AUX CKT 2
123 WH AUX CKT A579 OR WIPER MOTOR +
124 GN A/C A586 OR WIPER SW TO WIPER CONT
129 BU AUX CKT A588 GN SAFETY SOL RELAY TO SQL
140 BU AUX CKT C537 GN A/C PHOTO SENSOR + SIG
147 PU AUX CKT C538 OR A/C PHOTO SENSOR - SIG
149 PU AUX CKT
Lighting Circuits
150 OR BAT (+) 607 PK FLOOD LAMP - FRONT
151 GN AUX CKT 615 YL CAB FLOOD LAMP
152 BU AUX CKT 616 BU BOOM FLOOD LAMP
154 WH AUX CKT
Control Circuits
168 GN AUX CKT 763 BU TORQUE CONVERTER SW
172 GN AUX CKT 786 GN ENG SPEED CONT - HI PRESS SW
177 OR MAIN BRKR 788 YL ENG SPEED (+)
180 GN AUX CKT 791 PK ENG SPEED CONT - LO SQL
185 YL AUX CKT A718 PU START AID COOLANT SENSOR SIGNAL
189 WH AUX CKT A755 PK THROTTLE SW #1
191 WH AUX CKT A756 BU THROTTLE SW #2
Ground Circuits
A757 GY THROTTLE SW #3
200 BK MAIN CHASSIS A758 BR THROTTLE SW #4
201 BK OPR MON PANEL A761 PU ELECTRONIC PUMP CONT GROUND
235 BK ELECTRONIC PUMP CTRL GND A762 PU
ELECTRONIC PUMP CONT ENG SPEED
GROUND
Basic Machine Circuits
A768 BU PUMP CONTROL VALVE #1 (+)
301 BU STARTER NO. 1 SOL A769 GY PUMP CONTROL VALVE #2 (-)
304 WH STARTER RLY NO. 1 OUTPUT A770 PK ELECTRONIC PUMP CONTROL BYPASS SW
306 GN STARTER RLY COIL A771 PU FLOAT SW
307 OR KEY SW TO NEUT START SW F771 OR BACKUP SW
308 YL MAIN POWER RLY COIL F772 WH BACKUP SW
309 GY ALT REGULATOR TERM. F773 OR GOVERNOR ACCEL
310 PU START AID SW TO START AID SOL F774 WH GOVERNOR DECEL
311 WH START AID SOL TO TEMP SW 877 YL GLOW PLUG MAGNETIC SW TO GLOW PLUG
320 OR HORN RLY COIL TO SW 961 BR SELECTOR SW
321 BR TRAVEL ALARM K904 GN PUMP DISCHARGE - SIGNAL
322 GY WARNING HORN (FORWARD) K905 BU PUMP DISCHARGE
326 PU KEY SW “C” TERM. K906 GN SWING BRAKE SOL - SIGNAL
386 PK AIR SHUTOFF SOL ENABLE K907 BU SWING BRAKE SOL -
Monitoring Circuits
K909 BU BACKUP SW
403 GN ALTERNATOR (R) TERM. K91 1 PK E/P CONTROLLER - RS485 (+)
405 GY OPR MON OIL PRESS. (LO SETTING) K912 GN E/P CONTROLLER - RS485 (-)
412 BU OPR MON COOL FLOW K915 GN FINE SWING SW - E/P CONTROLLER
430 BU OPR MON AIR FILTER K997 BU +V SENSOR
487 OR HYD OIL FLOW SW L908 OR CONTROLLER RS-232C TX
491 PK HYD OIL TEMP SENSOR L909 BU CONTROLLER RS-232C RX
492 GY COOLANT TEMP SENSOR SIGNAL L968 OR ELECTRONIC PUMP CONT PS VALVE (-)
495 GN FUEL LEVEL SIGNAL L969 WH ELECTRONIC PUMP CONT PS VALVE (+)
496 WH OPR MON PANEL HYD OIL LEVEL L970 GY
ELECTRONIC PUMP CONT TO SWITCH
COMMON
A495 GY ALTERNATOR (R) TERMINAL #2 L971 GN
ELECTRONIC PUMP CONT TO TRAVEL
PRESS
C468 BU ENGINE OIL LEVEL L972 BU LOW IDLE SW
Accessory Circuits
L973 GN FINE SWING CONT RELAY TO SQL VALVE
501 GN WIPER - FRONT (LO) L974 GN
ELECTRONIC PUMP CTRL BOOM RAISE PRESS
SW
506 PU WASHER - FRONT L975 PK START AID CONT LAMP 1 OUTPUT
508 PU RADIO SPEAKER - LEFT L977 YL TRENCHING SOL
509 WH RADIO SPEAKER - LEFT (COMMON) L978 GY LEVEL FINISH SOL
511 BR RADIO SPEAKER - RIGHT
512 GN RADIO SPEAKER - RIGHT (COMMON)
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
plugand 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.
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
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
7
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
7
Machine Harness Connector And Component Locations
A
21
1
1
SENR8964
May 1996
325B L Excavator
Electrical System
2JR1-UP
©
1996 Caterpillar
All Rights Reserved
Printed in U.S.A.
SW
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 CONTROL CIRCUIT.
START AID CIRCUIT.
ENGINE/PUMP CONTROL.
ALL DASHED LINES ARE ATTACHMENTS.
107-RD
320-OR-18
I
1
112-PU-6
J704-WH-18
L52
615-YL
J704-WH-18
200-BK-18
J
C
B
A
320-OR-18
151-GN-18
150-RD-18
154-RD-18
546-BU-18
546-BU-18
154-RD-18
189-RD
172-RD-18
J
J
L15
L17
NEUTRAL START
LIMIT SW
111-4799
HORN SW
6I-5088
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
151-GN-18
118-GY
512-GN-18
511-BR-18
509-WH-18
103-RD-18
519-PK-18
113-OR-18
185-YL-18
105-RD
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
112-PU-14
112-PU-14
149-PU
140-BU
200-BK-18
200-BK-18
200-BK-14
147-PU-18
200-BK-18
H
M
M
N (NOTE D)
F
3 2
L971-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
306-GN-18
177-RD-14
177-RD-14
177-RD-14
177-RD-14
112-PU-14
152-BU
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
615-YL
308-YL-18
200-BK-18
200-BK
A
10
12
7
9
11
191-WH-14
200-BK-14
L970-GY-18
PLATFORM
A
L8
L970-GY-18
L8
L20
115-PK-14
200-BK-14
200-BK-18
J704-WH-18
547-OR-18
A588-GN-18
J
115-PK-14
111-RD-14
200-BK-18
A
12 VDC RADIO
103-8525
150-RD-18
C538-OR-18
200-BK-18
RH SPKR (-)
C537-GN-18
A513-RD-18
592-BU-18
154-RD-18
189-RD
172-RD-18
L22
RH SPKR (+)
LH SPKR (-)
K905-RD-14
LH SPKR (+)
L22
111-RD-14
150-RD-18
519-PK-18
200-BK-18
L970-GY-18
LAMP
126-7487
200-BK-14
A
A
152-BU
C
B
200-BK-14
200-BK-14
547-OR-18
J704-WH-18
GND
A
CONV (OUT)
576-PK
CONV (MEM)
2
1
L21
L20
PLATFORM
120-YL
L19
114-RD
114-RD
HYD
LOCK SOL
121-1491
L15
L14
N
200-BK
615-YL
129-BU
L15
L975-PK-18
K997-BU-18
326-RD
L21
L19
L3
L3
OPERATOR STATION
108-BU
M
N (NOTE D)
2
1
LOWER
WIPER MOTOR
131-0398
+
+1
-
MOTOR
615-YL
AUX HYD
PRESS SW
106-0181
200-BK
508-PU-18
CONN 29
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
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
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
200-BK-18
320-OR-18
111-RD-14
189-RD-14
112-PU-14
112-PU-14
185-YL-18
112-PU-14
112-PU-14
112-PU-14
107-RD
103-RD-18
105-RD
149-PU
191-WH-14
118-GY
124-GN-14
120-YL
A
3
7
9
1
11
5
2
1
4
3
5
6
A
J
12
11
10
6
1
3
5
2
7
8
9
4
J
A
4
177-RD-14
177-RD-14
177-RD-14
177-RD-14
147-PU-18
118-GY
124-GN-14
12
4
10
2
6
149-PU
140-BU
105-RD
107-RD
103-RD-18
147-PU-18
115-PK-14
120-YL
191-WH-14
10A
10A
15A
10A
10A
10A
15A
CAB/CHASSIS LAMP
RADIO
LOWER WASHER/WIPER
WASHER/WIPER
CIGAR LIGHTER
A/C /HEATER
HORN
A
15A
DOME LAMP
KEY SW
BOOM LAMP
FINE SWING
SHUTDOWN
ATCH LUBRICATOR
JJ
FUSE BASE
111-4812
L10
546-BU-18
1
8
6
2
J704-WH-18
547-OR-18
5
4
152-BU
J704-WH-18
961-GN-18
152-BU
3
549-PK-18
548-GY-18
152-BU
J704-WH-18
546-BU-18
547-OR-18
A
J704-WH-18
129-BU
120-YL
113-OR-18
123-WH-14
C538-OR-18
C537-GN-18
A513-RD-18
592-BU-18
A
J
8
7
5
4
3
2
L52
L20
547-OR-18
115-PK-14
K905-RD-14
150-RD-18
154-RD-18
172-RD-18
L39
L38
L37
L37
L38
177-RD-14
L39
115-PK-14
172-RD-18
189-RD
154-RD-18
150-RD-18
111-RD-14
K905-RD-14
L20
L22
L34
168-RD
114-RD
AUX CKT
J704-WH-18
113-OR-18
113-OR-18
129-BU
129-BU
SWITCH PANEL
113-OR-18
546-BU-18
114-RD
151-GN-18
308-YL-18
3
4
1
2
308-Yl-18
L10
L970-GY-18
2
1
8
7
5
6
4
3
508-PU-18
509-WH-18
511-BR-18
J
512-GN-18
200-BK-18
J
152-BU
ATCH HYD CTL
J
HYD OIL FILTER SW
113-OR-18
A513-RD-18
ANTENNA CABLE
134-4430
592-BU-18
200-BK-18
L24
168-RD
177-RD-14
L17
L15
L24
123-WH-14
108-BU
1
114-RD
140-BU
6
113-OR-18
113-OR-18
129-BU
108-BU
J
114-RD
200-BK-18
592-BU-18
A513-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
7
8
1
2
6
5
4
3
CONN 23
CONN 24
CONN 25
CONN 26
CONN 27
CONN 28
200-BK
A770-PK-18
200-BK
185-YL18
200-BK-18
320-OR-18
151-GN-18
200-BK-18
200-BK-18
791-PK-18
A770-PK-18
K909-BU-18
A770-PK-18
791-PK-18
615-YL
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
A770-PK-18
K909-BU-18
615-YL
791-PK-18
115-PK-18
115-PK-18
151-GN-18
200-BK-18
A588-GN-18
616-BU
149-PU-18
149-PU-18
149-PU
320-OR-18
H
I
311-WH-18
310-PU-18
ATCH START
AID SOL
3E-6332
1
AA
2
COOLANT
LEVEL SW
096-0744
MOTOR
UPPER WASHER
7T-8890
LOWER WASHER
7T-8890
BATTERY
3T-5760
POS
NEGNEG
POS
ATCH
BATTERY
3T-5760
(NOTE C)
200-BK
200-BK-18
K909-BU-18
POS
NEG NEG
POS
9 8 7 6 5
BK-00
DISCONNECT SW.
7N-0719
ALT BREAKER
9S-0174
YY
BACKUP
RESISTOR
102-8016
HYD LOCK SOL RELAY
111-4871
506-PU-18
CAB/CHASSIS LAMP RELAY
111-4871
578-BU-18
60A
200-BK-18
200-BK-18
MOTOR
A
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
A
DIODE
121-1022
KEY SW.(ON)
CONT UNIT
104-3204
ZZ
CHECK TERM.
RELAY
KEY SW.(START)
GND
INDICATOR
REGULATOR
TEMP.
L975-PK-18
306-GN-18
177-RD-14
177-RD-14
177-RD-14
RD-00
RD-00
506-PU-18
578-BU-18
177-RD-14
177-RD-14
VVAD
AD
177-RD-6
109-RD-6
101-RD-6
172-RD-18
111-RD-14
101-RD-6
101-RD-6
MAIN BREAKER
9S-0174
185-YL-18
112-PU-14
112-PU-14
180-GN
189-RD-14
8
ENG GOV
PLATFORMCHASSIS
GROUND STRAP
7G-1060
10A
FUSE
10A 9W-1442
15A 9W-1441
BACKUP
10A
10A
10A
10A
10A
10A
10A10A
10A
10A
10A
10A
15A
E/P CONT
HYD LOCK SOL
10A
AUX CKT
HYD LOCK SW
J
J
J
J
200-BK-18
200-BK-18
306-GN-18
114-RD
114-RD
60A
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
BB
189-RD
RELAY PANEL
115-PK-14
114-RD-18
114-RD-18
150-RD-18
A495-GY-18
115-PK-14
K909-BU-18
150-RD-18
306-GN-18
K909-BU-18
786-GN-18
177-RD-14
320-OR-18
200-BK-18
412-BU-18
K905-RD-14
150-RD-18
150-RD-18
150-RD-18
150-RD-18
150-RD-18
154-RD-18
L40
L17
L15
L17
L38
L37
L17
108-BU
L40
L39
180-GN
168-RD
J
1
2
180-GN
K905-RD-14
10A
112-PU-14
CC
GG
REMOVAL TOOL
7Y-5493
172-RD-18
114-RD
123-WH-14
123-WH-14
ATCH FAN
108-BU
607-PK
322-GY
322-GY
J704-WH-18
322-GY
114-RD
J704-WH-18
607-PK
ATCH LAMPS
AIR INLET HEATER
CONN 22
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
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
200-BK-14
519-PK-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
615-YL-18 615-YL
615-YL
A586-OR-18
501-GN-18
590-GY-18
124-GN-14
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
309-GY-18
308-YL-18
A718-PU-18
616-BU
149-PU
786-GN-18
320-OR-18
A588-GN-18
151-GN-18
200-BK-18
200-BK-18
200-BK-18
615-YL
200-BK-18
149-PU
200-BK-18
K909-BU-18
307-OR-18
386-PK-18
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
306-GN-18
306-GN-18
308-YL-18
308-YL-18
G
11
12
1
2
3
4
5
6
7
8
9
10
1
2
321-BR-18
200-BK-18
AIR CLEANER SW
109-9330
TRAVEL ALARM
3E-7738
B
1
2
320-OR-18
A770-PK-18
200-BK-18
308-YL-18
308-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
A770-PK-18
K909-BU-18
200-BK
F
A718-PU-18
386-PK-18
309-GY-18
616-BU
UU
VV
5
4
6
3
1
2
5
3
4
6
2
1
7
8
9
10
11
12
MAIN RELAY
3T-0376
4
5
6
3
12
2
1
7
11
8
9
10
DIODE
121-1022
200-BK-18
306-GN-18
177-RD-8
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
L973-GN-18
L977-YL-18
L978-GY-18
L974-GN-18
L969-WH-18
L968-OR-18
L973-GN-18
L972-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
306-GN-18
306-GN-18
615-YL-18
306-GN-18
487-OR-18
310-PU-18
107-RD
103-RD-18
177-RD-14
177-RD-14
177-RD-14
177-RD-14
310-PU-18
310-PU-18
200-BK-18
177-RD-14
200-BK-18
306-GN-18
200-BK-18
308-YL-18
177-RD-6
K909-BU-18
307-OR-18
200-BK-18
177-RD-14
115-PK-14
177-RD-14
177-RD-14
112-PU-6
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
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
L972-BU-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
200-BK-18
112-PU-6
A A
7
8
1
6
5
4
3
2
H H
304-WH-8
6
8
1
7
4
5
3
2
152-BU
152-BU
177-RD-8
114-RD
200-BK-18
A
1
6
4
3
2
A/C
UNIT
126-3376
177-RD-8
L971-GN-18
115-PK-14
154-RD-18
111-RD-14
150-RD-18
K997-BU-18
189-RD
154-RD-18
111-RD-14
150-RD-18
BB
B
A
A
L45
L15
L50
D
D
DA
A
A
L48
L47
189-RD
154-RD-18
111-RD-14
150-RD-18
115-PK-14
A495-GY-18
A495-GY-18
150-RD-18
114-RD
154-RD-18
189-RD
111-RD-14
306-GN-18
306-GN-18
C538-OR-18
C537-GN-18
308-YL-18
576-PK
5
310-PU-18
877-YL-4101-RD-4
386-PK-18
326-RD
A768-BU-18
172-RD-18
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
A495-GY-18
111-RD-14
189-RD
154-RD-18
154-RD-18
310-PU-18
200-BK-18
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
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
200-BK-18
607-PK
322-GY
K909-BU-18
607-PK
L18
430-BU-18
310-PU-18
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
306-GN-18
A718-PU-18
309-GY-18
616-BU
304-WH-8
877-YL-4
101-RD-4
ANTENNA
CABLE
8R-6111
322-GY
607-PK
2
1
IN 1
L21
GND
UU
L19
ZZ
YY
JJ
XX
WW
12
1
8
2
10
11
3
4
9
TIMER RELAY
111-4870
7
6
XX
5
615-YL-18
NEUTRAL
START RELAY
111-4871
START RELAY
125-1302
L21
L18
L34
L34
L8
L19
L3
L4
L25
L25
L4
L21
JJ KK
L20
109-RD-6
607-PK
1
2
2
4
HEATER
RELAY
116-0114
KK
B
BA
A
109-RD-6
L48
L47
L47
L48
A
B
B
B
B
DB
L51
L49
L51
L49
961-GN-18
3
2
1
180-GN
A571-PU
H
A572-PK
A572-PK
A571-PU
326-RD
180-GN
961-GN-18
961-GN-18
200-BK-14
326-RD
576-PK
BLOCK
121-1023
L45
L49
113-OR-18
140-BU
123-WH-14
J704-WH-18
615-YL
114-RD
123-WH-14
J704-WH-18
+B
COMP
GND
SUN+
SUN-
ATCH
HEATER UNIT
128-9726
615-YL
308-YL-18
A588-GN-18
322-GY
607-PK
615-YL
115-PK-14
J704-WH-18
J704-WH-18
615-YL
607-PK
322-GY
B
CONN 2
CONN 3
CONN
4
CONN 5
CONN 9
CONN 8
CONN 7
CONN 6
CONN 14
CONN 15
CONN
16
CONN 17
CONN 18
CONN 19
CONN 20
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
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
G
F
E
L973-GN-18
ENG/PUMP CONT
132-7784
L971-GN-18
L970-GY-18
L977-YL-18
L974-GN-18
L969-WH-18
403-GN-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
763-BU-18
A771-PU-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
496-WH-18
576-PK
C468-BU-18
K907-BU-18
K904-GN-18
EPR VALVE (+)
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
COOLANT SENSOR
9
28
31
26
13
30
29
35
40
2
6
39
24
25
22
15
ALTERNATOR (R TERM)
7
38
12
TRAVEL ALARM
ENG OIL PRESS SW
36
SWING BRAKE SOL
23
EPR VALVE (-)
17
21
8
27
18 TRAVEL PRESS SW
BOOM RAISE PRESS SW
LEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS SW
A
37
4
3
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
32
33
DEGITAL OUT (-)
DEGITAL OUT (-)
14
11
34
JOY STICK +B OUT
L10
549-PK-18
548-GY-18
200-BK
200-BK-18
L8
L8
L18
200-BK-18
200-BK-18
200-BK-18
L13
L12
L11
L9
J704-WH-18
308-YL-18
L3
L19
L21
L20
4
WIPER
W INT
W LOW
PUMP
+B
WASH
GND
GND
H
549-PK-18
4
H
H
J704-WH-18
548-GY-18
J704-WH-18
LAMP
126-7487
1
3
2
A758-BR-18
118-GY
307-OR-18
A757-GY-18
615-YL-18
A756-BU-18
A755-PK-18
105-RD
A586-OR-18
549-PK-18
549-PK-18
L7
548-GY-18
501-GN-18
K912-GN-18
A
201-BK-18
103-RD-18
5
4
3
2
1
J704-WH-18
308-YL-18
152-BU
J704-WH-18
548-GY-18
200-BK-18
200-BK
615-YL
326-RD
200-BK-18
200-BK
200-BK-18
129-BU
K911-PK-18
590-GY-18
308-YL-18
403-GN-18
A579-OR
C538-OR-18
C537-GN-18
200-BK-14
200-BK-18
615-YL
L972-BU-18
200-BK-18
308-YL-18
200-BK-18
113-OR-18
791-PK-18
786-GN-18
A586-OR-18
501-GN-18
590-GY-18
615-YL
6
L11
L12
H
L6
E
E
E
+
H
ONE TOUCH
LOW IDLE SW
6I-5088
200-BK-18
+B
L. CHASSIS
L. BOOM
WASH
W. LOW
W. INT
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
N
200-BK
200-BK-18
200-BK
L21
L19
L3
L18
L18
L13
L13
L12
L11
L13
L12
L11
E
K997-BU-18
L7
L14
L1
SW INPUT
F
S4
S3
S2
S1
COM
M
H
MONITOR
106-0172
SWITCH PANEL
111-4800
KEY SW
9G-7641
H
SUN LOAD
SENSOR
128-2162
-
SERVICE
METER
6T-7337
THROTTLE
POS SW
106-0107
EE
R
C
S
B
WIPER/WASHER
CONTROLLER
127-9838
615-YL
OFF
ON
ST
LIGHTER
9W-0335
506-PU-18
CONN 21
E
D
C
B
A
200-BK-18
311-WH-18
C468-BU-18
200-BK-18
A761-PU-18
BK
WH
200-BK-18
F773-OR-18
F774-WH-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
763-BU-18
200-BK-18
200-BK-18
200-BK-18
A768-BU-18
A769-GY-18
101-RD-4
304-WH-8
311-WH-18
403-GN-18
309-GY-18
492-GY-18
A718-PU-18
877-YL-4
A762-PU-18
788-YL-18
405-GY-18
F774-WH-18
F773-OR-18
A761-PU-18
C468-BU-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
405-GY-18
788-YL-18
A762-PU-18
304-WH-8
RD-00
RD-00
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
L977-YL-18
L978-GY-18
L978-GY-18
763-BU-18
L977-YL-18
200-BK-18
200-BK-18
200-BK-18
326-RD
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
877-YL-4
326-RD
K997-BU-18
ATCH START AID
COOLANT TEMP SW.
3E-6449
2
1
B
T~
AIH COOLANT
TEMP SENSOR
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
SG
B
STARTER
MOTOR
104-7040
B-
2
1
ENG
SHUTDOWN SOL
8C-3663
ENG OIL
PRESS SW
3E-6455
CHASSIS
BK-18
RD-18
ENG SPEED
PICKUP
6V-2455
A
C
B
A
BU-18
B+
RD
ALT
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
22
9 8 7
1
4
3
5
4
5
3
L44
L43
L44
B
CHASSIS
L42
L41
L29
L30
C
EE
AA
L43
L43
B
CHASSIS
L28
L30
L29
L41
L42
L42
L41
2
3
4
1
1
4
3
2306-GN-18
ATCH
SUCTION LINE
SHUTOFF LIMIT SW
3E-5181
4
1 2
3
K909-BU-18
308-YL-18
308-YL-18
200-BK-18
200-BK-18
SPEAKER (L)
6T-7695
SPEAKER (R)
6T-7695
F
F
200-BK-18
K906-GN-18
200-BK-18
189-RD
177-RD-14
111-RD-14
A495-GY-18
RELAY PANEL
200-BK-18
L974-GN-18
K906-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
L974-GN-18
200-BK-18
200-BK-18
200-BK-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
495-GN-18
616-BU
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
A761-PU-18
F773-OR-18
F774-WH-18
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
A762-PU-18
C468-BU-18
109-RD-6
101-RD-4
304-WH-8
309-GY-18
492-GY-18
A718-PU-18
877-YL-4
311-WH-18
B
ANTENNA
8E-1118
200-BK-18
495-GN-18
616-BU
200-BK-18
311-WH-18
321-BR-18
412-BU-18
12 VDC RADIO
3E-7140
(NOTE F)
L973-GN-18
147-PU-18
OUT 1
+B
IN 2
OUT 2
AB
1
3
RESISTOR
7Y-8242
2
1
B
403-GN-18
109-RD-6
519-PK-18
FINE SWING
SOL
107-7056
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
1
2
1
B
2
1
B
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
TRAVEL
PRESS SW
106-0179
172-RD-18
322-GY
607-PK
L50
L51
113-OR-18
L45
L44
L42
L41
L29
L30
L44
L42
L41
L29
L30
L30
L29
L41
L30
L29
L28
-
+
-
+
512-GN-18
511-BR-18
509-WH-18
508-PU-18
OR
109-RD-6
326-RD
L42
WH-18
WH-18
WH-18
WH-18
B
L44
B
6V-5821 (NOTE C)
+B
L45
607-PK
L971-GN-18
A771-PU-18
L971-GN-18
A771-PU-18
L44
172-RD-18
519-PK-18
322-GY
113-OR-18
607-PK
607-PK
AIR INLET HEATER
CONN 1
103-RD-18
403-GN-18
403-GN-18
403-GN-18
403-GN-18
235-BK-14 235-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
103-RD-18
200-BK-14
200-BK-14
403-GN-18
200-BK-14
6 5 4
D
3 2
1
C
B
A
200-BK-18
487-OR-18
200-BK-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
495-GN-18
AD 128-8936
NOTE E : REM'D WITH ATCH HEATER OPTION.
496-WH-18
200-BK-18
BK
YL
B
HYD OIL
FILTER SW
116-3660
GROUND
SIGNAL
+B
C
B
A
BB
B
HYD OIL
TEMP SENDER
4I-5394
FUEL LEVEL
SENSOR
105-9911
2
1
HYD OIL
LEVEL SW
111-4760
2
T~
1
B
200-BK-14
200-BK-14
K912-GN-18
K911-PK-18
403-GN-18
615-YL-18
K911-PK-18
K912-GN-18
A586-OR-18
590-GY-18
501-GN-18
200-BK-14
103-RD-18
118-GY
615-YL-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
590-GY-18
501-GN-18
A586-OR-18
103-RD-18
103-RD-18
509-WH-18
511-BR-18
512-GN-18
118-GY
103-RD-18
506-PU-18
C
B
A
118-GY
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
308-YL-18
L975-PK-18
615-YL
NOTE C : USE WITH COLD WEATHER.
ZZ 111-4831
K997-BU-18
235-BK-18
K997-BU-18
K997-BU-18
235-BK-18
F772-WH-18
F771-OR-18
K915-GN-18
K911-PK-18
K912-GN-18
L909-BU-18
L908-OR-18
487-OR-18
K905-RD-18
235-BK-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
SIS
CONNECTOR
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
GOV ACTR (A)
GOV ACTR (B)
RS485 - (VALVE CONT)
RS485 + (VALVE CONT)
RS232C (GND)
RS232C (RX)
20
10
6 RS485 - (RH JOYSTICK)
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)
HYD OIL FILTER INDICATOR
18 RS485 - (RADIO CONT)
RS485 + (ELEC GOV)19
+B
+B
AIH INDICATOR
FINE SWING 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
DOME LAMP
6C-9121
2
3
4
5
6
1
8
7
2
1
8
3
5
4
7
6
4
3
1
2
F
F
E E
A
A A
L7
A
A
3
1
4
2
576-PK
129-BU
403-GN-18
615-YL-18
103-RD-18
C538-OR-18
K997-BU-18
12
11
10
9
K912-GN-18
K911-PK-18
501-GN-18
C537-GN-18
590-GY-18
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
JJ 111-4832
HH 7Y-8298
GG 116-0242
FF 116-0080
EE 125-4767
DD 111-4881
CC 125-4727
BB 116-0080
AA 121-1046
CABLE AS.
VV 128-8937
WIRE AS.
200-BK-14
A586-OR-18
A579-OR
1
3
200-BK-14
K 111-4835 B-2
J 132-1979 H-3
H 133-6079 D-3
G 121-0986 A-1
F 128-7337 G-1
E 128-7336 E-1
D 132-1978 F-8
C 130-8446 A-9
B 130-8445 A-3
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
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
200-BK-18
HARNESS AS.
592-BU-18
509-WH-18
508-PU-18
512-GN-18
511-BR-18
A513-RD-18
592-BU-18
A513-RD-18
615-YL
CONVERTER
112-3543 (2.5A)
615-YL
6
1
2
3
4
5
GND
OUT
IN
MEM
IGN
MOTOR
F
UPPER WIPER
MOTOR
134-5551
4
2
6
KK 111-4833
495-GN-18
200-BK-18
616-BU
NOTE B : USE WITH SHORT BOOM.
200-BK-18
L969-WH-18
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
NOTE F : HORIZONTAL MTG LOCATION FOR CASSETTE
200-BK-18
200-BK-18
615-YL-18
615-YL-18
200-BK-18
L8
L970-GY-18
L8
YY 111-4830
615-YL-18
615-YL-18
578-BU-18
L973-GN-18
200-BK-18
200-BK-18
K907-BU-18
K905-RD-14
GND
CONV (OUT)
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
XX 111-4829
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L33
L31
L9
L12
L13
200-BK-18
592-BU-18
L31
HH
L33
L33
L33
L33
K915-GN-18
308-YL-18
L19
L3
L25
L4
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
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
L27
L26
615-YL
L27
L26
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
615-YL-18
A769-GY-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
WW 128-8938
310-PU-18
615-YL-18
615-YL-18
200-BK-18
H
ATCH START
AID SW
111-4784
185-YL-18
L5
LOWER
WIPER SW
111-4785
LOWER
WASHER SW
111-4786
H
L11
FINE
SWING CONT SW
111-4788
HH
BACKUP
EPR VALVE SW
114-0421
H H
BACKUP
GOV SW
110-7884
H
200-BK-18
200-BK
200-BK
200-BK
200-BK-14
200-BK
RH SPKR (-)
RH SPKR (+)
LH SPKR (-)
A 130-8444 C-2
LH SPKR (+)
6
5
3
4
2
1
8
7
L8
152-BU
L6
F
108-BU
120-YL
616-BU
200-BK
103-RD-18
118-GY
A579-OR
F
615-YL
615-YL
200-BK-14
386-PK-18
306-GN-18
491-PK-18
487-OR-18
496-WH-18
200-BK-18
386-PK-18
306-GN-18 491-PK-18
200-BK-18
200-BK-18
616-BU
A572-PK
A571-PU
180-GN
615-YL
607-PK
322-GY
200-BK
200-BK
H
M 130-2211 G-1
AE
200-BK
615-YL
A579-OR
118-GY
322-GY
F
615-YL
120-YL
118-GY
A513-RD-18
C538-OR-18
129-BU
C537-GN-18
C538-OR-18
N 129-8144 G-1
200-BK
C537-GN-18
5
322-GY
616-BU
118-GY
108-BU
129-BU
A579-OR
A513-RD-18
615-YL
120-YL
592-BU-18
A579-OR
F
A
200-BK
616-BU
322-GY
L970-GY-18
CONV (MEM)
OPERATOR STATION
322-GY
607-PK
200-BK-18
103-RD-18
118-GY
A579-OR
A579-OR
200-BK
607-PK
607-PK
200-BK
AE
L8
201-BK-18
3
1
4
2
B
306-GN-18
103-RD-18
120-YL
200-BK
K
B
2
AC
4
1
200-BK-18
961-GN-18
3
L5
L7
L6
CAB
ATCH
HYD CONT SW
111-4787
306-GN-18
AC
AC
200-BK
L9
K905-RD-18
K905-RD-18
A
A
E
L7
L6
L7
L1
AC 133-8895 A-2
AE 132-1973 A-3
NOTE D : USE WITH FALLING OBJECT GUARD.
B
L1
K905-RD-18
AC
ATCH
BOOM LAMP
5I-8250
L20
CHASSIS
G (NOTE B)
AB 121-1044 A-6
HORN
7T-0970
200-BK
G (NOTE B)
K
607-PK
K
G (NOTE B)
200-BK
200-BK-18
616-BU-18
200-BK-18
616-BU-18
200-BK
200-BK
113-OR-18
322-GY
607-PK
L2
L3
L2
UU 111-4826
CHASSIS
LAMP
5I-8251
ATCH
BOOM LAMP
5I-8250
322-GY
L6
NOTE A : NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
L7
607-PK
607-PK
2
1
L7
HORN
7T-0969
L6
THIS SCHEMATIC IS FOR THE 325B-HYD EXCAVATOR.
(116-0177)
D57899
ELECTRICAL CONNECTION
TO MACHINE STRUCTURE
506-PU-18
506-PU-18
508-PU-18
K905-RD-18
CONN 10
CONN 11
CONN 12
CONN 13
CONN 31
CONN 32
CONN 33
CONN
30
CONN 34
F-8
F-8
F-8
F-8
F-8
F-8
I-8
A-8
I-8
I-8
I-8
A-8
H-8
H-8
A-8
F-8
F-8