320B EXCAVATOR ELECTRICAL SYSTEM

©
2000 Caterpillar
All Rights Reserved
Printed in U.S.A.
SENR9278-03
March 2000
320B Excavator
Electrical System
7JR1-UP
1XS1-UP
2AS1-UP
5MS1-UP
9WS1-UP
6LW1-UP
3YZ1-UP
Code Description of Problems
1301 Engine oil pressure is too low.
1302 Engine coolant temperature is too high.
1303 Hydraulic oil temperature is too high.
1304 Air filter is clogged.
1305 Battery voltage is not normal.
2201 Governor actuator feedback sensor circuit is open or shorted to battery voltage.
2202 Governor actuator feedback sensor circuit is shorted to body ground.
2301 Governor actuator feedback signal is not stable.
2302 Governor actuator feedback signal deviates.
2303 Governor actuator does not move.
2304 Calibration data error.
3201 Monitor RAM is not normal.
4101 Electric power supply to the controller is too much (43 volts).
4102 Over-current in proportional reducing valve.
4103 Proportional reducing valve circuit is open.
4104 Monitor power supply (digital output) over current.
4105 Over-current in digital output (trenching solenoid).
4106 Over-current in digital output (fine control solenoid).
4107 Over-current in digital output (travel speed change solenoid).
4108 Over-current in digital output (travel alarm).
4109 Spare solenoid 1 (digital output) over current.
410A Over-current in digital output (swing brake solenoid).
410B Spare solenoid 2 (digital output) over current.
4201 Engine speed is not normal.
4202 Engine coolant temperature sensor is shorted to body ground.
4203 Hydraulic oil temperature sensor is shorted to body ground.
4204 PWM sensor of pump delivery pressure is shorted to body ground.
4205 Spare PWM sensor 1 is shorted to body ground.
4206 Spare PWM sensor 2 is shorted to body ground.
4207 PWM sensor of pump delivery pressure is open in circuit.
420A Fuel sensor is shorted to body ground
420B Fuel sensor is open or shorted to battery voltage.
420C Electric power supply is to low (below 23 volts).
420D Electric power supply is to high (above 32 volts).
420E Engine speed dial is not in one of the 10 specified positions.
4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal).
4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal).
4303 Engine stalls.
A201 Monitor communication is not normal.
A202 Monitor takes too much time to respond to controller's signal.
A203 Communication is abnormal in controller.
Real Time Error Codes
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Accessory Circuits (Continued)
101 RD Bat(+) 546 BU Aux Hyd - Rotate CW
103 RD Doom Lamp 547 OR Aux Hyd - Rotate CCW
105 RD Key Sw 548 GY Aux Hyd - Open
107 RD Eng Shut 549 PK Aux Hyd - Close
109 RD Alt Output(+) Term. 575 YL Wiper. Aux (Park)
111 RD Aux Ckt 576 PK Wiper.Aux(Low)
112 PU Main Power Rly Output 576 BU Washer.Aux
113 OR Opr Mon Panel VMIS B+ Switched 586 BR Aux Hyd . Close
114 RD Warning Horn (Forward) A587 YL Power Window Cont To Safety Sol Relay
115 PK Cab/Chassis Lamp A588 GN Safety Sol Relay To Sol
118 GY Washer/Wiper C537 GN A/C Photo Sensor + Sig
120 YL Converter C538 OR A/C Photo Sensor. Sig
124 GN A/C
Lighting Circuits
129 BU Cigar Lighter 607 PK Flood Lamp - Front
135 BU Aux Ckt 615 YL Cab Flood Lamp/Rops
139 OR Aux Ckt 616 BU Bucket Flood Lamp/Boom Flood Lamp
140 BU Lubricator 633 BU Attach Lighting Ckt
145 BU Aux Ckt 638 WH Rotary Beacon
147 PU Flow Cont/Fine Swing Solenoid
Control Circuits
149 PU Boom Lamp 763 BU Torque Converter SW
150 RD Hyd Lock SW/ Hyd Lock Sol 779 WH Coupler Engage Sal
151 BN Aux Ckt 780 PU Coupler Disengage Sal
152 BU Aux Ckt 786 GN Eng Speed Cant. Hi Press SW
154 RD Aux Ckt 788 YL EngSpeed(+)
168 RD Aux Ckt 791 PK Eng Speed Cont. Lo Sol
172 RD Aux Ckt A755 PK Throttle SW #1
176 BU Aux Ckt A756 BU Throttle SW #2
176 YL Aux Ckt A757 GY Throttle SW #3
177 RD Main Brkr A758 BR Throttle SW #4
180 BN Aux Ckt A761 PU Electronic Pump Cont Throggle Ground
185 YL Aux Ckt A762 PU Electronic Pump Cant Eng Speed Ground
189 RD Aux Ckt A768 BU Pump Control Valve #1 (+)
191 WH Aux Ckt A769 GY Pump Control Valve #2 (-)
196 BU lnsp Lamp A770 PK Electronic Pump Cont Bypass SW To Resistor
198 PK Aux Ckt A771 PU Float SW
Ground Circuits
F771 OR Backup SW
200 BK Main Chassis F772 WH Backup SW
210 BK ConverterOutput(24/12 Volt) F773 OR Governor Accel
235 BK Electronic Pump Ctrl Gnd F774 WH Governor Decel
Basic Machine Circuits
F846 PU LED Driver 1
306 GN Starter Relay Coil G848 GN LED Driver 2
307 OR Key SW To Neutral Start SW G872 PU Espar Cab Heater to Power Switch
308 YL Main Power Relay Coil 952 OR Hammer SW B
310 PU Start Aid SW To Start Aid Sol 954 GN HammerSWA
320 OR Horn Relay Coil To SW 955 RU Hammer Sol A
321 BR Backup Alarm Lamp Travel Alarm K904 GN Pump Discharge - Signal
326 RD Key SW "C" Term. K905 RD Pump Discharge. +B
386 PK Air Shutoff Solenoid Enable K906 GN Swing Brake Sol - Signal
Monitoring Circuits
K907 RU Swing Brake Sol - +8
403 GN Alternator (R) Term. K909 BU Backup SW +8
405 GY Opr Mon Oil Press. (Low Setting) K911 PK EJP Controller - RS4BS (+)
412 BU OprMon Cool Flow K912 GN E/P Controller - RS4BS (-)
430 BU Opr Mon Air Filter K915 GN Fine Swing SW - E/P Controller
487 OR Hyd Oil Flow SW K997 BU +V Sensor, EMS-Il
491 PK VMIS Hyd Oil Temp Sensor L908 OR Controller RS-232C Tx
492 GY VMIS Coolant Temp Sensor Signal L909 BU Controller RS-232C Rx
495 GN VMIS Fuel Level Signal L968 OR Electronic Pump Control Ps Valve (.)
496 WH Opr MOn Panel Hyd Oil Level L969 WH Electronic Pump Contral Ps Valve (+)
A424 WH Press. Transducer 1 Signal L970 GY Electronic Pump Cant To SW Common Return
A425 YL Press. Transducer 2 Signal L971 GN Electronic Pump Cant To Travel Pressure SW
C468 BU Engine Oil Level L972 BU Low Idle SW
Accessory Circuits
L973 GN Fine Swing Cont Relay To Sol Valve
506 PU Washer-Front L974 GN Electronics Pump Ctrl Boom Raise Press SW
508 PU Radio Speaker - Left L975 PK Start Aid Cont Lamp 1 Output
509 WH Radio Speaker - Left (Commom) L977 YL Trenching Sol
511 BR Radio Speaker - Right L978 GY Level Finish Sol
512 GN Radio Speaker. Right (Common) N923 GY Backup Mode Switch 1
519 PK Thermostat To Refrigerant Press. SW N924 WH Backup Mode Switch 2
524 BU Wiper - Left (Low)
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
3E-1906 Solenoid: A/C Clutch 17.6 ± 0.6
3E-6332 Solenoid: Valve Start Aid 6.00
4I-5394 Sender: Hydraulic Oil Temp
20824 - 25415 @ 0°C
6134 - 7496 @ 25°C
3989 - 4875@35°C
2224 - 2718 @ 50°C
973 - 1189 @ 75°C
475 - 522 @ 100°C
221 - 269 @ 125°C
7Y-8242 Resistor: Timer Relay 47.0 ± 4.7
8C-3663
Start (Latch) Coil
Stop (Unlatch) Coil
1.55 ± 0.1510.3±1.03
102-8017 Resistor: Backup 52.0 ± 2.6
111-9916
Solenoid: Engine/Pump Control
Flow Control
11,7 ± 1.2
121-1490
Solenoid: Level Finish
Trenching
32.0 ± 3.2
121-1491
Solenoid: AC1
AC2
Hydraulic Lock
Swing Brake
Travel Speed
32.0 ± 3.2
¹ At room temperature unless otherwise noted.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6449 Coolant Temperature (Start Aid)
38 ± 3° C
(100 ± 5°F)
27” C Mm
(80.6° F)
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
1520 ± 98 kPa
(224.4 ± 14.21 psi)
1127 kPa MIN
(163.5 psi MIN)
Normally Open
106-0180 Boom RaisePressure
2646.00 ± 196.00 kPa
(383.77 ± 28.43 psi)
2156.00 ± 196.00 kPa
(312.70 ± 28.43 psi)
Normally Open
114-5333 Refrigerant Pressure (AC)
275 to 1750 kPa ¹
(40 to 255 psi)
—
—
Normally Open ²
131-9203 Aux Hydraulic Pressure
3500 kPa MAX
(507.6 psi)
3000 ± 150 kPa
(435.1 ±21.8 psi)
A-B Normally Open
A-C Normally Closed
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.
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
A/C Unit H-4 10 Seat W/Seat Heater (Atch) F-4 E
Alarm - Travel (Atch) G-12 2 Sender - Hyd Oil Temp A-5 5
Alternator B-11 11 Sensor - A/C Photo D-7 A
Batteries I-11 13 Sensor - Engine Speed B-11 20
Block - Terminal F-9 D Sensor - Fuel Level A-5 6
Breaker - Alternator I-11 D Sensor - Overload Warning Device O.W.D. A1 F-11 D
Breaker - Fuel Heater E-8 D Sensor - Pump Discharge Press B-8 26
Breaker - Main I-11 D Socket - 12v B-6 15
Breaker - Warming Windshield D-8 D Solenoid - A/C Clutch C-11 27
Cigar Lighter C-7 A Solenoid - AC1 I-8 39
Control - Overload Warning Device O.W.D. G-5 A Solenoid - AC2 I-8 39
Control - Wiper B-7 A Solenoid - Aux Pedal On/Off E-1 39
Controller - Aux/Hyd (Atch) H-9 33 Solenoid - Engine Shutdown B-11 11
Controller - Engine/Pump E-2 2 Solenoid - Flow Control I-8 29
Convertor C-6 15 Solenoid - Fine Swing E-10 28
Diode G-10 7 Solenoid - Hammer 2 I-6 30
Fuse - Block I-1,2,3 C Solenoid - High Press A3 F-10 39
Ground - Cab B-7 A Solenoid - Hyd Lock E-1 G
Ground - Chassis A-3 23 Solenoid - Level Finish A-8 33
Ground - Chassis I-12 D Solenoid - Rl/R2 I-7 39
Ground - Chassis A-5 E Solenoid - Start Aid (Atch) I-12 31
Ground - Platform D-1 F Solenoid - Swing Brake E-10 32
Ground - Relay Panel G-11 D Solenoid - Travel Speed A-8 33
Ground - Strap Chassis/Platform I-5 2 Solenoid - Trenching A-8 33
Horns A-2 16 Switch - Air Cleaner H-12 35
Joystick - Multiswitch F-3,G-11 A Switch - Backup D-2 B
Meter - Service C-7 A Switch - Boom Raise Press D-10 34
Monitor C-7 A Switch - Coolant Level I-12 36
Motor - Govener Assembly A-11 20 Switch - Disconnect I-11 D
Motor - Lower Wiper F-1 F Switch - Engine Oil Level A-11 18
Motor - Starter A-11 20 Switch - Engine Oil Press B-11 38
Motor - Upper Wiper B-6 22 Switch - Swing Control D-4 33
Motor - Washer I-12 D Switch - Hyd Oil Filter A-5 E
Pump - Auto Lubrication (Atch) H-12 7 Switch - Hyd Oil Level A-5 E
Pump - Heater Fuel (Atch) D-7 D Switch - Implement Press D-10 39
Pump - Refueling A-3 D Switch - Neutral Start Limet H-4 C
Relay - Boom Lamp I-10 D Switch - Overload Warning Device O.W.D. D-4 B
Relay - Cab/Chassis Lamp I-10 D Switch - Panel F-2 B
Relay - Fuel Heater E-8 D Switch - Pressure I-7 39
Relay - Horn I-10 D Switch - Prox I-7 39
Relay - Hyd Lock Solenoid I-10 D Switch - Refrigerant Low Press C-11 24
Relay - Main G-10 7 Switch - Refueling (Atch) A-5 40
Relay - Neutral Start F-7 D Switch - Refueling Start (Atch) A-4 41
Relay - Refueling 1 (Atch) A-3 23 Switch - Refueling Stop (Atch) A-4 41
Relay - Refueling 2 (Atch) A-3 23 Switch - Seat Heater (Atch) D-4 B
Relay - Start F-8 D Switch - Start Aid (Atch) D-5 B
Relay - Start Disable E-8 D Switch - Start Aid Coolant Temp (Atch) B-11 24
Relay - Heater F-8 D Switch - Key E-2 B
Relay - Timer F-7 D Switch - Travel Press D-10 39
Resistor - Backup I-11 24 Switch - Windshield B-7 A
Machine locations are repeated for components located close together.
A = Located inside of cab.
B = Located inside of right console.
C = Located inside of left console.
D = Located around relay panel.
E = Located around hydraulic oil tank.
F = Located around pilot manifold.
G = Located under platform.
H = Located inside dash.
Related Electrical Service Manuals
Form Number
Alternator: 132-2156 SENR4757
Electric Starting Motor: 104-7040
Consist: 6V-5821 SENR3581
Engine/Pump Control: SENR9291
Starting and Charging: SENR9292
Title
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 F-12 D
CONN 2 F-12 D
CONN 3 G-12 D
CONN 4 G-12 D
CONN 5 H-11 D
CONN 6 G-11 D
CONN 7 G-11 D
CONN 8 A-11 1
CONN 9 F-9 D
CONN 10 I-7 29
CONN 11 I-7 29
CONN 12 A-6 E
CONN 13 C-6 21
CONN 14 G-6 F
CONN 15 G-6 F
CONN 16 G-6 F
CONN 17 H-6 F
CONN 18 H-6 F
CONN 19 H-5 F
CONN 20 G-5 F
CONN 21 F-5 B
CONN 22 F-5 B
CONN 23 F-5 B
CONN 24 F-5 B
CONN 25 C-5 24
CONN 26 C-5 F
CONN 27 C-4 F
CONN 28 C-4 F
CONN 29 A-4 23
CONN 30 A-4 7
CONN 31 A-4 7
CONN 32 F-4 B
CONN 33 F-4 B
CONN 34 F-4 B
CONN 35 H-4 C
CONN 36 H-3 C
CONN 37 H-3 C
CONN 38 H-3 C
CONN 39 H-3 C
CONN 40 H-3 C
CONN 41 A-3 7
CONN 42 B-3 9
CONN 43 B-2 9
CONN 44 H-2 C
CONN 45 H-2 C
CONN 46 SIS Connector H-11 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.
E98059
Machine Harness Connector and Component Locations
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
26
27
28
29
30
31
32
17
35
33
34
36
38
7
F
39
40
41
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
26
27
28
29
30
31
32
35
33
34
36
38
7
F
39
40
41
12
16
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
Normally open switch that is closed due to an applied condition, and will open again with a
specific decrease in that condition.
Normally closed switch that will open with an increase of a specific condition.
Normally closed switch that is open due to an applied condition, and will close again
with a specific decrease in that condition.
The circle indicates that the component has screw terminals and a wire can be disconnected
from it.
No circle indicates that the wire cannot be disconnected from the component.
This indicates that the component has a wire connected to it that is connected to ground.
This indicates that the component does not have a wire connected to ground. It is grounded
by being fastened to the machine.
Electrical Schematic Symbols And Definitions
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
A AA
2
A AA
1
2
325-PK-14
C
A
325-PK-14
200-BK-14
T
FUSE - A component in an electrical circuit that will open the circuit if too much current flows
through it.
REED SWITCH - A switch whose contacts are controlled by a magnet. A magnet closes the
contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
SENDER - A component that is used with a temperature or pressure gauge. The sender
measures the temperature or pressure. Its resistance changes to give an indication to the
gauge of the temperature or pressure.
RELAY (Magnetic Switch) - A relay is an electrical component that is activated by electricity.
It has a coil that makes an electromagnet when current flows through it. The electromagnet
can open or close the switch part of the relay.
CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too
much current flows through it. This does not destroy the circuit breaker and it can be reset to
become part of the circuit again.
SOLENOID - A solenoid is an electrical component that is activated by electricity. It has a coil
that makes an electromagnet when current flows through it. The electromagnet can open or
close a valve or move a piece of metal that can do work.
Harness And Wire Electrical Schematic Symbols
Socket
Pin
Pin or Socket
Number
Wire, Cable, or Harness
Assembly Identification
Single Wire
Connector
Circuit Number
Identification
Wire
Gauge
Wire
Color
Plug
Receptacle
9X-1123
Component
Part Number
Electrical Schematic Symbols And Definitions
1
1
1
2
2
Typical representation of a
Sure-Seal connector. The
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.
200-BK-14
200-BK-14
386-PK-18
AF
306-GN-18
AF 162-0341 E-9
2
3
4
1
405-GY-18
578-BU-18
200-BK-14
ATCH. AUX. CKT
ATCH FUEL
HEATER
135-6299 (NOTE H)
1
2
200-BK-14
AK
G872-PU-14
200-BK-18
200-BK-18
200-BK-18
TO WARMING
WINDSHIELD
112-PU-14
YY
STARTER
MOTOR
128-5621
USED FOR ARCTIC PACKAGE
B (NOTE H)
101-RD-2
301-BU-10
MOTOR
ALT
R
B+
CHASSIS
B-
304-WH-8
G
S
MTR
BAT
101-RD-2
RD-00
RD-00
200-BK-4
200-BK-18
200-BK-2
BK-00
ALTERNATOR
159-9901
B
B
HH
AA
EE
200-BK-2
109-RD-2
403-GN-18
B
B (NOTE H)
304-WH-8
G872-PU-14
101-RD-14
7
3
306-GN-18
101-RD-12
4
1
145-BU-12
386-PK-18
15A
40A
5A
15A
143-BR-12
200-BK-14
145-BU-12
405-GY-18
578-BU-18
578-BU-18
405-GY-18
112-PU-14
G872-PU-14
101-RD-14
200-BK-14
START HEATER
ESPAR
111-4871
200-BK
START DISABLE
RELAY
111-4871
SW ON
HEATER
SW OFF
HEATER
INDICATOR
ON HEATER
SW ON/OFF
FUEL HEATER
330-YL-18
330-YL-18
INDICATOR
ON FUEL HEATER
WARMING WINDSHIELD
RELAY
125-1302
FUEL HEATER
BREAKER
3T-2662
WARMING WINDSHIELD
BREAKER
8D-7265
ATCH. PANEL GP
ARCTIC
160-2147 (NOTE H)
158-BR-14
158-BR-14
8
6
10
12
2
9
5
11
4
5
11
12
323-WH
BU
10
2
1
3
6
9
8
7
323-WH
323-WH
323-WH
GY
YL
BR
RD
PK
OR
BK
PU
GN
WH
4
+24 VDC OUT-WATER PUMP
5
11
12
10
2
1
3
6
7
8
9
ATCH HEATER GP
136-9001 (NOTE H)
+24 VDC IN-FUEL HEATER
FUEL PUMP
FUEL PUMP
FUEL FIRED HEATER-ENABLE
+24 VDC IN-FUEL HEATER
GROUND
AF
AF
FUEL HEATER
RELAY
111-4871
AF
323-WH
323-WH
ATTACHMENT
HEATER FUEL PUMP
136-7707 (NOTE H)
PUMP
NOTE H : USE WITH ARCTIC PACKAGE
ANTI DRIFT PRESS SW
(VA BOOM)
ANTI-DRIFT SOL
(VA BOOM)
200-BK
H918-WH
1
2
200-BK
H918-WH
200-BK
H918-WH
H918-WH
2
1
A587-YL
2
1
1
2
N923-GY-18
N923-GY-18
N923-GY-18
N923-GY-18
N923-GY-14
G848-GN-18
G848-GN-18
G848-GN-18
G848-GN-18
F846-PU-18
F846-PU-18
200-BK-14
200-BK-18
200-BK-18
200-BK-18
200-BK
A850-WH-18
A849-OR-18
200-BK
200-BK-18
F846-PU-18
200-BK
N923-GY-14
200-BK
N923-GY
952-OR-18
200-BK-18
200-BK-18
N919-GN-18
N920-BU-18
N924-WH-18
A756-PU-18
N921-YL-18
N922-OR-18
200-BK-18
3
4
5
6
7
2
8
A755-PK-18
A757-WH-18
8
1
2
7
3
4
5
6
1
8
NN
NN
K976-OR-18
954-GN-18
K975-WH-18
K974-PU-18
K973-BR-18
A758-BR-18
N924-WH-18
PROX SW
3T-3132
AC2
(ON/OFF)
121-1491
SOL
R1/R2
125-8075
F846-PU-18
AUX PRESS
SW
131-9203
951-PK-18
A
B
QQ
955-BU-18
C
1
2
2
1
585-YL-18
A848-PK-18
A847-YL-18
NN
NN
NN
PP
AC1
(ON/OFF)
121-1491
PP
200-BK-18
1
2
NN
1
2
950-BR-18
200-BK-18
L970-GY-18
C
QQ
B
A
PRESSURE SW
106-0179
952-OR-18
1
2
NN
N923-GY-18
952-OR-18
N923-GY
N923-GY-14
952-OR-18
952-OR-18
952-OR-18
952-OR-18
200-BK-14
952-OR-18
K976-OR-18
K975-WH-18
K974-PU-18
K973-BR-18
N919-GN-18
N920-BU-18
N921-YL-18
N922-OR-18
546-BU-18
548-GY-18
549-PK-18
547-OR-18
952-OR-18
N923-GY
G848-GN-18
A849-OR-18
A850-WH-18
951-PK-18
950-BR-18
A847-YL-18
A848-PK-18
F846-PU-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
L34
K976-OR-18
K975-WH-18
ATCH-AUX/BACKUP
RELAY
145-6907
200-BK-14
L970-GY-18
N924-WH-18
546-BU-18
547-OR-18
548-GY-18
549-PK-18
K974-PU-18
K973-BR-18
954-GN-18
955-BU-18
G848-GN-18
F846-PU-18
952-OR-18
N923-GY-14
A755-PK-18
A756-PU-18
A757-WH-18
A758-BR-18
ATCH-AUX/HYD
CONTROLLER
122-9897
A587-YL-18
A587-YL-18
A587-YL-18
L970-GY-18
200-BK-14
200-BK-14
118-GY
524-BU
638-WH
524-BU
118-GY
615-YL-18
615-YL
L55
L54
2
3
K973-BR-18
K974-PU-18
K975-WH-18
K976-OR-18
4
L38
JJ
A
A
JJ
1
4
3
2
A758-BR-18
A757-WH-18
A756-PU-18
A755-PK-18
1
A587-YL-18
5
6
4
2
3
1
4
2
3
5
1
A587-YL-18
6
N923-GY-18
G848-GN-18
F846-PU-18
955-BU-18
952-OR-18
RABBIT
2 WAY
1 WAY
PS
961-BR-18
7
8
N923-GY-18
N923-GY-18
N923-GY-14
198-PK-18
549-PK-18
198-PK-18
548-GY-18
A587-YL-18
A587-YL-18
A587-YL-18
A587-YL-18
A587-YL-18
955-BU-18
955-BU-18
633-BU-18
954-GN-18
200-BK-18
200-BK
200-BK
200-BK-14
200-BK
200-BK
200-BK
200-BK
200-BK-14
200-BK-18
200-BK-18
576-PK-18
A
AUX PEDAL
ON/OFF SOL
2
1
200-BK-18
A
L6
L6
L6
L6
L6
N924-WH-18
961-BR-18
547-OR-18
198-PK-18
546-BU-18
198-PK-18
200-BK-18
320-OR-18
151-GN-18
150-RD-18150-RD-18
154-RD-18154-RD-18
151-GN-18
320-OR-18
200-BK-18
1
3
J
A
2
4
547-OR-18
198-PK-18
546-BU-18
198-PK-18
200-BK-18
306-GN-18
200-BK-18
2
1
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
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
111-RD-14
112-PU-14
112-PU-14
189-RD-14189-RD-14
112-PU-14
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
112-PU-14
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
111-RD-14
487-OR-18
200-BK-18
310-PU-18
107-RD
103-RD-18
320-OR-18
168-RD-14
140-BU
200-BK
151-GN-18
AK
200-BK-18
200-BK-18
578-BU-18
150-RD-18
150-RD-18150-RD-18
150-RD-18
112-PU-6
K909-BU-18
A587-YL-18
A588-GN-18
196-BU
151-GN-18
150-RD-18
308-YL-18
307-OR-18
791-PK-18
615-YL
786-GN-18
149-PU
320-OR-18
114-RD-18
K905-RD-14
A770-PK-18
112-PU-14
112-PU-14
200-BK
112-PU-14
K905-RD-14
150-RD-18
112-PU-14
308-YL-18
112-PU-14
112-PU-14
112-PU-14
140-BU
149-PU
147-PU-18
105-RD
107-RD
114-RD-18
191-WH-14
954-GN-18
115-PK-14
200-BK-18
200-BK-18
103-RD-18
A587-YL-18
403-GN-18
A771-PU-18
120-YL
118-GY
788-YL-18
A762-PU-18
763-BU-18
412-BU-18
C468-BU-18
N924-WH-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
124-GN-14
129-BU-18
235-BK-14
200-BK-14
200-BK
961-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
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
952-OR-18
G848-GN-18
954-GN-18
N923-GY-14
955-BU-18
N924-WH-18
512-GN-18
F846-PU-18
A587-YL-18
198-PK-18
200-BK-14
546-BU-18
L970-GY-18
511-BR-18
547-OR-18
548-BU-18
508-PU-18
200-BK-18
509-WH-18
200-BK-18
200-BK
200-BK-18
779-WH-18
519-PK-18
124-GN-18
124-GN-18
779-WH-18
124-GN-14
779-WH-18
779-WH-18
A424-WH-18
A425-YL-18
780-PU-18
780-PU-18
780-PU-18
780-PU-18
LOW PRESSURE
SOL (A1)
121-1491
1
2
HIGH PRESSURE
SOL (A2)
156-9513
HIGH PRESSURE
SOL (A3)
156-9513
780-PU-18
780-PU-18
A
2
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
147-PU-18
200-BK-18
140-BU
149-PU
168-RD-14
114-RD-18
151-GN-18
320-OR-18
196-BU
590-GY-18
501-GN-18
A586-OR-18
107-RD
786-GN-18
791-PK-18
113-OR-18
308-YL-18
112-PU-14
307-OR-18
105-RD
A758-BR-18
549-OR-18
A755-PK-18
576-PK-18
575-YL-18
112-PU-14
578-BU-18
112-PU-14
112-PU-14
112-PU-14
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
615-YL-18
235-BK-14
615-YL-18
235-BK-18
235-BK-18
308-YL-18
A758-BR-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
1
788-YL-18
200-BK-18
1
A771-PU-18
A586-OR-18
501-GN-18
590-GY-18
200-BK-18
200-BK-18
200-BK-18
L6
320-OR-18
N923-GY-18
2
386-PK-18
306-GN-18
L29
200-BK
147-PU-18
111-RD-14
140-BU
149-PU
168-RD-14
114-RD-18
189-RD-14
151-GN-18
320-OR-18
112-PU-14
196-BU
112-PU-14
114-RD-18
168-RD-14
151-GN-18
112-PU-14
112-PU-14
2
112-PU-14
112-PU-14
A
185-YL-18
779-WH-18
780-PU-18
200-BK-18 200-BK-18
A
780-PU-18
112-PU-14
200-BK-18
780-PU-18
200-BK
112-PU-14
112-PU-14
196-BU
140-BU
107-RD
114-RD-18
105-RD
168-RD-14
149-PU
191-WH-14
129-BU-18
118-GY
124-GN-14
120-YL
A
K909-BU-18
196-BU
961-BR-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
J
A
3
7
9
1
309-GY-18
308-YL-18
11
A718-PU-18
616-BU
149-PU
786-GN-18
322-GY-18
5
320-OR-18
196-BU
A587-YL-18
A588-GN-18
151-GN-18
200-BK-18
200-BK-18
200-BK-18
607-PK-18
615-YL
791-PK-18
A770-PK-18
200-BK-18
200-BK-18
149-PU
200-BK-18
K909-BU-18
307-OR-18
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
306-GN-18
306-GN-18
200-BK-18
200-BK-18
K909-BU-18
A770-PK-18
791-PK-18
615-YL
607-PK-18
200-BK-18
151-GN-18
A588-GN-18
A587-YL-18
196-BU
320-OR-18
J
322-GY-18
786-GN-18
149-PU
616-BU
A
A718-PU-18
2
306-GN-18
310-PU-18
200-BK-18
308-YL-18
1
308-YL-18
A770-PK-18
K909-BU-18
615-YL
607-PK-18
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
322-GY-18
320-OR-18
308-YL-18
K909-BU-18
307-OR-18
200-BK-18
200-BK-18
306-GN-18
386-PK-18
112-PU-14
112-PU-14
386-PK-18
149-PU
140-BU
306-GN-18
103-RD-18
147-PU-18
1
4
3
2
200-BK-14
200-BK-14
ROTARY SW
155-2715
BK
BU
403-GN-18
6
1
2
3
5
4
A
J
200-BK-18
311-WH-18
8
311-WH-18
310-PU-18
12
11
6
1
3
5
2
7
8
9
4
J
A
177-RD-14
177-RD-14
177-RD-14
177-RD-14
6
7
4
168-RD-14
172-RD-18
196-BU
168-RD-14
GN
147-PU-18
147-PU-18
118-GY
124-GN-14
12
4
10
2
6
C468-BU-18
BN
A587-YL-18
A
A
1
2
185-YL-18
149-PU
11
12
1
2
3
4
5
6
196-BU
7
8
9
10
4
3
1
4
3
2
780-PU-18
779-WH-18
1
2
180-GN
154-RD-18
111-RD-14
112-PU-14
8
112-PU-14
129-BU-18
877-YL-4
140-BU
105-RD
107-RD
114-RD-18
2
5
147-PU-18
200-BK-18
115-PK-14
120-YL
191-WH-14
3
5
4
1
3
A/C UNIT
126-3375
S
6
2
1
INSP LAMP
10A
10A
15A
10A
10A
10A
ENG GOV
15A
J
J
FINE SWING SOL
ATCH-AUX CKT
CAB/CHASSIS LAMP
CONVERTER
ATCH-AUX CKT
WASHER/WIPER
CIGAR LIGHTER
A/C /HEATER
10A
HORN
FUSE
10A 9W-1442
15A 9W-1441
30A 8T-9636
BACKUP
15A
DOME LAMP
KEY SW
REFUELING PUMP
BOOM LAMP
FLOW CONT SOL
10A
10A
30A
10A
10A
10A
10A
10A
A761-PU-18
10A
10A
10A
10A
15A
E/P CONT
HYD LOCK SOL
10A
SHUTDOWN
O.W.D.
AUX CKT
SW PANEL
LUBRICATOR
306-GN-18
147-PU-18
HYD LOCK SW
JJ
J
J
FUSE BASE
111-4812
S
6
5
147-PU-18
386-PK-18
306-GN-18
BK
WH
AE B
8
9
6
5
12
11
386-PK-18
386-PK-18
306-GN-18
4
10
10
9
8
12
7
6
11
L21
5
308-YL-18
152-BU
2
1
4
3
2
549-PK-18
200-BK-14
308-YL-18
A
J
8
7
6
5
4
3
1
548-GY-18
2
1
10
198-PK-18
3
K905-RD-14
150-RD-18
150-RD-18
105-RD
185-YL-18
113-OR-18
124-GN-18
200-BK-18
548-GY-18
549-PK-18
198-PK-18
198-PK-18
115-PK-14
198-PK-18
198-PK-18
113-OR-18
150-RD-18
154-RD-18
172-RD-18
185-YL-18
177-RD-14
115-PK-14
172-RD-18
189-RD
154-RD-18
150-RD-18
111-RD-14
K905-RD-14
113-OR-18
113-OR-18
L22
F773-OR-18
8
1
7
2
AUX CKT
113-OR-18
113-OR-18
308-YL-18
SIS CONNECTOR
3E-5136
E
200-BK-14
4
176-YL
B+ 12V
MM
C537-GN-18
C538-OR-18
200-BK-14
124-GN-14
519-PK-18
ATCH
AM/FM RADIO
MEMORY +12V
139-OR-18
135-BU
633-BU-18
210-BK
103-RD
120-YL
152-BU-14
C538-OR-18
C537-GN-18
GROUND
152-BU-14
168-RD-12
177-RD-12
K905-RD-14
103-RD
168-RD-12
103-RD
SPEAKER RH+
152-BU-14
152-BU-14152-BU-14
152-BU-14
SPEAKER LH-
103-RD
168-RD-12
103-RD
K905-RD-14
177-RD-12
168-RD-12
152-BU-14
SPEAKER RH-
198-PK-18
C537-GN-18
C538-OR-18
152-BU-14
120-YL
198-PK-18
961-BR-18
SPEAKER LH+
F774-WH-18
103-RD
633-BU-18
135-BU
139-OR-18
+12V LIGHT
135-BU
139-OR-18
519-PK-18
124-GN-14
200-BK-14
C538-OR-18
C537-GN-18
210-BK
511-BR-18
176-YL
509-WH-18
189-RD-14189-RD-14
547-OR-18
546-BU-18
586-BR-18
200-BK-14
A425-YL-18
112-PU-14
112-PU-14
308-YL-18
113-OR-18
113-OR-18
AUX CKT
512-GN-18
198-PK-18
547-OR-18
198-PK-18
113-OR-18
113-OR-18
3
K905-RD-14
111-RD-14
150-RD-18
154-RD-18
189-RD
172-RD-18
115-PK-14
177-RD-14
D
172-RD-18
154-RD-18
150-RD-18
113-OR-18
115-PK-14
C
177-RD-14
150-RD-18
L908L909
235
150-RD-18
K905-RD-14
MM F
10
200-BK
615-YL
CAB LAMP
5I-8250
1
2
3
A424-WH-18
7
4
5
615-YL
200-BK
6
A425-YL-18
L17
176-YL
308-YL-18
7
8
J
A
308-YL-18
306-GN-18
586-BR-18
L56
306-GN-18
200-BK
ATCH START AID
COOLANT TEMP SW.
3E-6449
2
1
B
ATCH START
AID SOL
3E-6332
T
147-PU-18
546-BU-18
J
J
J J
HYD LOCK SW
147-PU-18
LUBRICATOR
SW PANEL
AUX CKT
176-YL
SHUTDOWN
177-RD-14
200-BK-14
200-BK-14
306-GN-18
AIH COOLANT
TEMP SENSOR
125-4812
1
B
2
1
GROUND
ON(KEY)1
2
AIR CLEANER SW
109-9330
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUND
+B
BK-18
BR-18
YL-18
B
C
AIR HEATER
6I-4753
T
B
GND
F/B
+B
ACCEL
B B
B
BK-00
C
2
1
DECEL
6
B
B
ENG GOV
ACTUATOR
106-0126
A A
HH
B
C
B
BB
C
C
C
C
C
L57
KEY
L57
REFRIGERANT
LOW PRESS SW
114-5333
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
N923-GY-14
10A
A756-PU-18
615-YL
B
B
191-WH-14
COOLANT
LEVEL SW
096-0744
1
2
T
COOLANT TEMP
SENSOR
4I-5394
MOTOR
C
B
BATMTR
S
G
B
STARTER
MOTOR
104-7040
B-
WASHER
7T-8890
A
2
1
ENG
SHUTDOWN SOL
8C-3663
ENG OIL
PRESS SW
3E-6455
CHASSIS
BK-18
RD-18
ENG SPEED
PICKUP
6V-2455
B
BATTERY
3T-5760
POS
NEGNEG
POS
A
C
B
A
BU-18
B+
R
D
ALT
A/C CLUTCH
SOL
3E-1906
MOTOR
ATCH
BATTERY
3T-5760
(NOTE C)
HYD LOCK SOL
E/P CONT
L57
N924-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
320-OR-18
763-BU-18
200-BK-18
200-BK-18
200-BK-18
L972-BU-18
200-BK-18
549-PK-18
198-PK-18
MULTISWITCH JOSTICK
122-4828
RIGHT SW
548-GY-18
198-PK-18
LEFT SW
H
15A
10A
114-RD-18
10A
A768-BU-18
A769-GY-18
10A
10A
10A
10A
10A
10A
10A
30A
10A
10A
FLOW CONT SOL
307-OR-18
BOOM LAMP
REFUELING PUMP
KEY SW
DOME LAMP
101-RD-4
304-WH-8
15A
311-WH-18
BACKUP
HORN
403-GN-18
10A
309-GY-18
492-GY-18
A718-PU-18
A762-PU-18
788-YL-18
405-GY-18
A/C /HEATER
CIGAR LIGHTER
F774-WH-18
F773-OR-18
A761-PU-18
WASHER/WIPER
ATCH-AUX CKT
CONVERTER
CAB/CHASSIS LAMP
ATCH-AUX CKT
C468-BU-18
FINE SWING SOL
549-PK-18
198-PK-18
548-GY-18
198-PK-18
549-PK-18
103-RD
4
2
A
H
3
1
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
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
308-YL-18
308-YL-18
112-PU-6
L55
L54
L54
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
ATCH ROTATING
BEACON SW
200-BK
A758-BR-18
POS
NEG NEG
POS
A757-WH-18
A756-PU-18
A755-PK-18
L4
L972-BU-18
L968-OR-18
L969-WH-18
K907-BU-18
F772-WH-18
ONE TOUCH
LOW IDLE SW
F771-OR-18
200-BK-18
H
ATCH AUX HYD
CONT SW
111-4787
L20
L16
L16
9
8
11
3
K909-BU-18
MOTOR
A
L55
308-YL-18
S
J
J
15A
ENG GOV
10A
10A
10A
15A
10A
10A
INSP LAMP
1
2
6
508-PU-18
4
5
3
111-RD-14
Y/G
Y/W
200-BK-14
UPPER WIPER MOTOR
131-0399
L20
F
405-GY-18
BK-00
200-BK-18
304-WH-8
308-YL-18
M
A718-PU-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
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
FOR
INSP LAMP
9R-7941
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
ATTACHMENT-ENG OIL
PRESS SW
3E-6455 (NOTE H)
NEUTRAL
START RELAY
111-4871
BK-18
B
A
C
START RELAY
125-1302
6
3
12
2
1
7
11
8
9
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
10
DIODE
121-1022
DIODE
121-1022
12V SOCKET
9R-7941
615-YL
LL KK
RD-18
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.
200-BK
200-BK
200-BK
200-BK-18
615-YL-18
615-YL
QQ 134-6475 I-6
NN 153-7794 I-6
PP 160-0973 I-6
103-RD-18
F
DOME LAMP
096-0721
1
2
103-RD-18
C538-OR-18
C537-GN-18
C537-GN-18
C538-OR-18
524-BU
120-YL
120-YL
524-BU
191-WH-14
615-YL
135-BU
200-BK-18
139-OR-18
638-WH
955-BU-18
3
5
4
7
1
8
6
L975-PK-18
L975-PK-18
L975-PK-18L975-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
200-BK
L971-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
ENG/PUMP CONT
126-2981
L971-GN-18
L970-GY-18
L977-YL-18
L974-GN-18
L969-WH-18
200-BK
200-BK
200-BK
152-BU
638-WH
8630-BU-18
200-BK
506-PU
RELAY
ATCH
BEACON
8630-BU-18
638-WH
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
109-RD-6
L977-YL-18
495-GN-18
109-RD-6
306-GN-18
200-BK-18
306-GN-18
306-GN-18
200-BK-18
C
A
B
200-BK-18
152-BU
K906-GN-18
177-RD-14
177-RD-14
177-RD-14
177-RD-14
177-RD-14
177-RD-14
325-PK-18
177-RD-14
L53
L53
L52
L52
310-PU-18
325-PK-18
310-PU-18
310-PU-18
877-YL-4101-RD-4
177-RD-6
177-RD-14
200-BK-18
955-BU-18
N924-WH-18
326-RD
A768-BU-18
BK
YL
172-RD-18
B
A
B
BA
A
C
115-PK-14
GG (NOTE C)
RD-00
RD-00
C
A
B
BBBB
2
1
177-RD-14
B
177-RD-14
177-RD-14
177-RD-14
506-PU
177-RD-14
177-RD-14
177-RD-14
177-RD-14
112-PU-6
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
AC
2
1
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
N
2
1
B
1
22
1
FUEL LEVEL
SENSOR
105-9911
306-GN-18
ATCH
REFUELING SW
5C-6108
2
1
B
2
1
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
TRAVEL
PRESS SW
106-0179
B
120-YL
115-PK-14
147-PU-18
114-RD-18
107-RD
105-RD
140-BU
177-RD-14
129-BU-18
154-RD-18
8
151-GN-18
180-GN
320-OR-18
200-BK-18
A756-PU-18
A757-WH-18
AUX BACKUP SW
C
B
A
L57
191-WH-14
N924-WH-18
JJ
NN
A
JJ
A
149-PU
185-YL-18
A587-YL-18
JJ
A757-WH-18
6
2
10
N923-GY-14
191-WH-14
124-GN-14
112-PU-14
112-PU-14
118-GY
147-PU-18
A588-GN-18
VV
200-BK-18
AD
AD
177-RD-6
109-RD-6
101-RD-6
101-RD-6
101-RD-6
150-RD-18
MAIN BREAKER
9S-0174
151-GN-18
210-BK
112-PU-14
3
111-RD-14
308-YL-18
200-BK
307-OR-18
200-BK
A587-YL-18
200-BK-14
200-BK-14
K912-GN-18
K911-PK-18
403-GN-18
147-PU-18
524-BU
615-YL-18
K911-PK-18
K912-GN-18
1
N923-GY-14
168-RD-14
A586-OR-18
152-BU
152-BU-18
152-BU-14
196-BU
172-RD-18
A425-YL-18
590-GY-18
501-GN-18
A755-PK-18
A756-PU-18
A757-WH-18
A758-BR-18
L972-BU-18
200-BK-14
103-RD-18
K915-GN-18
168-RD-14
118-GY
129-BU-18
615-YL-18
403-GN-18
633-BU-18
638-WH
139-OR-18
135-BU
135-BU
2
L40
210-BK
200-BK-14
L26
1
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
615-YL
615-YL
235-BK-14
200-BK-14
200-BK-14
200-BK
506-PU
590-GY-18
501-GN-18
A586-OR-18
A755-PK-18
103-RD-18
103-RD-18
152-BU
152-BU-18
152-BU
152-BU-18
508-PU-18
509-WH-18
N923-GY-18
C
511-BR-18
152-BU
512-GN-18
129-BU-18
L909-BU-18
103-RD
118-GY
235-BK-14
2
L908-OR-18
524-BU
N923-GY-18
N923-GY-14
177-RD-14
177-RD-14
177-RD-14
4
NN
177-RD-14
QQ
200-BK-18
A756-PU-18
A757-WH-18
308-YL-18
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K915-GN-18
K907-BU-18
235-BK-18
235-BK-18
L909-BU-18
L908-OR-18
196-BU
A
J
4
9
A758-BR-18
308-YL-18
191-WH-14
8
7
2
5
3
1
6
11
A848-PK-18
A847-YL-18
118-GY
12
A A
7
8
1
6
5
4
3
2
PLATFORM
GROUND STRAP
7G-1060
L40
H H
306-GN-18
152-BU-18
200-BK-18
200-BK
200-BK-14
J
A
A424-WH-18
4
5
3
2
1
6
K997-BU-18
112-PU-14
PLATFORM
A
112-PU-14
6
8
1
7
4
5
3
2
200-BK-14
200-BK-18
118-GY
A
L56
954-GN-18
954-GN-18
118-GY
200-BK-14
200-BK-18
107-RD
403-GN-18
L40
103-RD
L908-OR-18
152-BU
L17
118-GY
112-PU-6
152-BU
103-RD
200-BK-14
L19
C
235-BK-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
A755-PK-18
763-BU-18
A757-WH-18
L909-BU-18
R
L908-OR-18
2
A771-PU-18
306-GN-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
496-WH-18
638-WH
308-YL-18
L975-PK-18
638-WH
118-GY
524-BU
210-BK
2
1
4
200-BK-14
615-YL
3
NOTE C : USE WITH COLD WEATHER.
200-BK
ZZ 111-4831 F-11
200-BK-14
K997-BU-18
103-RD-18
5
8
6
7
135-BU
135-BU
210-BK
210-BK
200-BK
135-BU
2
1
K997-BU-18
590-GY-18
501-GN-18
129-BU-18
403-GN-18
A587-YL-18
L3
954-GN-18
952-OR-18
952-OR-18
952-OR-18
952-OR-18
779-WH-18
780-PU-18
200-BK-18
235-BK-18
779-WH-18
K997-BU-18
779-WH-18
780-PU-18
779-WH-18
780-PU-18
779-WH-18
779-WH-18
780-PU-18
779-WH-18
779-WH-18
235-BK-18
23
K997-BU-18
954-GN-18
633-BU-18
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
60A
103-RD-18
615-YL-18
A586-OR-18
506-PU
M
139-OR-18
L909-BU-18
L908-OR-18
487-OR-18
120-YL
K904-GN-18
MM
K905-RD-18
235-BK-18
615-YL
C537-GN-18
615-YL
512-GN-18
511-BR-18
509-WH-18
508-PU-18
C538-OR-18
103-RD-18
L909-BU-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
33
24
25
22
15
ALTERNATOR (R TERM)
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS SW
36
SWING BRAKE SOL
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK)
35
CAB
36
RS485 - (LH JOYSTICK)
RS485 + (PEDAL)
6
7
RS485 + (SEMI AUTO)
RS485 - (PEDAL)
RS485 + (RADIO CONT)
8
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
1
9
RS485 - (RADIO CONT)
RS485 + (ELEC GOV)
10
+B
+B
AIH INDICATOR
FINE SWING SW
2
BOOM RAISE PRESS SW
LEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS SW
29
30
18
KEY SW ON
RS485 - (ELEC GOV)
19
12
40
2
4
25
20
LOW IDLE SW
21
17
1
11
22
34
3
24
23
14
13
16
15
5
32
31
26
28
27
39
38
37
GND
GND
HAMMER PRESS. SW
RS232C (TX)
KEY SW START
A
LUNCH BOX LIGHT
2
3
4
5
6
1
8
7
37
4
3
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
615-YL
32
33
14
11
34
1
6
10
7
12
1
5
2
4
615-YL
CONVERTER
131-0327
7
6
5
4
3
8
1
2
5
4
3
2
1
6
F
F
F
F E E
A A A
118-GY
L6
F
ANTENNA
106-0036
GND
24V BAT IN MEM
24V SW. IN
12V MEM OUT
GND
12V SW. OUT
177-RD-14
A424-WH-18
2
3
4
5
6
1
8
7
JOYSTICK +B OUT
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
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
BBB
N
B
A
A
L45
L15
L50
L45
RELAY PANEL
115-PK-14
114-RD-18
114-RD-18
114-RD-18
L15
D
D
DA
A
A
L48
L47
114-RD-18
150-RD-18
189-RD
154-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
189-RD
111-RD-14
K909-BU-18
K997-BU-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
L47
308-YL-18
308-YL-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
L50
L48
A
B
B
B
B
DB
L51
321-BR-18
L49
L51
L49
L50
L51
A587-YL-18
L44
L42
L41
L29
L30
L44
L42
L41
L29
L30
L30
L29
L41
L42
L44
L30
L29
L41
L42
L44
L42
L41
L29
L30
4
3
5
200-BK
SENSOR O.W.D.
132-7315
168-RD-18
4
5
BUZZER AS
113-4683
168-RD-18
200-BK-14
200-BK-18
200-BK-18
491-PK-18
200-BK-18
496-WH-18
L21
487-OR-18
491-PK-18
168-RD-18
7
140-BU
200-BK
200-BK-18
200-BK-18
L976-GN-18
321-BR-18
200-BK
140-BU
430-BU-18
412-BU-18
310-PU-18
311-WH-18
200-BK-18
200-BK-18
AE 121-1044 A-6
430-BU-18
200-BK-18
513-OR-18
519-PK-18
200-BK-18
412-BU-18
1
2
B
OR
PK
140-BU
200-BK
326-RD
L971-GN-18
200-BK-18
A771-PU-18
L974-GN-18
K906-GN-18
KK 111-4833 F-11
200-BK-18
1
T
2
HYD OIL
LEVEL SW
111-4760
HYD OIL
TEMP SENDER
4I-5394
B
B
B
A
B
200-BK-18
200-BK-18
200-BK-18
200-BK-18
C
+B
L971-GN-18
A771-PU-18
SIGNAL
L974-GN-18
200-BK-18
200-BK-18
200-BK-18
GROUND
HYD OIL
FILTER SW
116-3660
B
200-BK-18
496-WH-18
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
LL 111-4832 F-11
HH 132-1806 A-12
GG 116-0242 I-11
FF 116-0080 H-11
EE 121-0996 A-11
DD 111-4881 I-11
CC 143-1646 I-11
BB 116-0080 I-11
AA 121-0997 A-11
CABLE AS.
VV 128-8937 G-10
WIRE AS.
R 128-8876 A-3
200-BK-18
487-OR-18
N 116-0247 E-11
M 117-7028 C-6
L 7Y-3994 A-1
K 148-5179 B-1
J 175-1317 H-3
H 175-3000 D-3
G 4I-5396 B-1
F 154-8149 C-6
E 130-6568 C-5
D 155-1788 G-11
C 130-6572 A-12
B 144-8419 B-3
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
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
176-YL
1
2
SIGNAL IN
HARNESS AS.
SIGNAL OUT
310-PU-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
495-GN-18
616-BU
322-GY-18
200-BK-18
607-PK-18
168-RD-14
487-OR-18
A425-YL-18
491-PK-18
308-YL-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
A
779-WH-18
2
2
1
NOTE E : NOT NECESSARY FOR ELECTRIC OPENABLE
WINDSHIELD.
1
2
JJ
JJ
ATCH-FOOT
SWITCH
PEDAL-RH
ATCH-FOOT
SWITCH
PEDAL-LH
NN
HAMMER 2
SOL (ON/OFF)
116-3413
2
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
311-WH-18
200-BK
200-BK
124-GN-18
311-WH-18
321-WH-18
519-PK-18
412-BU-18
430-BU-18
A537-PK-18
2
1
200-BK-18
310-PU-18
586-BR-18
1
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
308-YL-18
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
L56
A718-PU-18
309-GY-18
616-BU
322-GY-18
607-PK-18
200-BK-18
304-WH-8
877-YL-4
101-RD-4
109-RD-6
JJ 153-1149 H-5
MM 111-4846 I-4
152-BU
L973-GN-18
147-PU-18
K909-BU-18
200-BK-18
6V-5821
(NOTE C)
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
JJ
176-YL
NN
1
200-BK
5
3
6
1
4
2
L970-GY-18
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
12
3
3
HH
AA
H
2
A
H
4
A
NOTE B ; USE WITH SHORT BOOM.
A757-WH-18
200-BK-18
172-RD-18
877-YL-4
3
L44
L43
L44
B
CHASSIS
L42
200-BK-18
L41
L29
L30
326-RD
A537-PK-18
124-GN-18
172-RD-18
8
7
6
C
EE
AA
L969-WH-18
L43
L43
K997-BU-18
200-BK-18
CHASSIS
L30
L10
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
200-BK-18
5
200-BK-18
185-YL-18
4
S 136-4731 H-2
L29
L10
L10
200-BK
L8
200-BK
L30
L29
L41
L42
L42
L41
3
2
1
JJ
NN
A758-BR-18
A757-WH-18
A756-PU-18
A755-PK-18
200-BK-18
200-BK-18
N923-GY-14
L15
952-OR-18
F846-PU-18
G848-GN-18
955-BU-18
954-GN-18
615-YL-18
615-YL-18
200-BK-18
K973-BR-18
K974-PU-18
K975-WH-18
K976-OR-18
L56
L56
200-BK-18
200-BK-18
200-BK-18
L15
549-PK-18
200-BK-18
548-GY-18
547-OR-18
546-BU-18
CHASSIS
YY 111-4830 F-11
615-YL-18
200-BK-18
ANTENNA CABLE
111-4846
N924-WH-18
L970-GY-18
575-YL-18
200-BK-18
576-PK-18
A537-PK-18
578-BU-18
200-BK-14
L973-GN-18
152-BU-18
6
200-BK-18
8
200-BK-18
5
4
200-BK-18
3
7
K907-BU-18
2
1
200-BK-18
200-BK-18
615-YL-18
615-YL-18
586-BR-18
200-BK-18
200-BK-18
L34
615-YL-18
200-BK-18
K909-BU-18
200-BK-18
H
200-BK-18
200-BK-18
549-PK-18
198-PK-18
XX 111-4829 F-11
548-GY-18
198-PK-18
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L25
524-BU
L16
L19
L3
L25
L33
326-RD
326-RD
L21
L32
L31
L18
L9
L8
L12
L13
L13
L12
L11
L8
L9
L10
L32
L31
HH
L33
L33
L33
L33
K915-GN-18
L20
308-YL-18
L19
L3
L25
L4
L4
L25
L3
L19
L16
L32
L31
L4
L25
L3
L19
L20
L20
L19
L20
L25
L3
L4
103-RD
L19
L20
L25
L2
K997-BU-18
K997-BU-18
K997-BU-18
615-YL-18
615-YL-18
L27
ATCH ROTATING BEACON LAMP
L27
L26
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
2
L25
L30
K906-GN-18
615-YL-18
185-YL-18
L29
200-BK-18
WW 128-8938 F-11
310-PU-18
200-BK-18
549-PK-18
200-BK-18
615-YL-18
615-YL-18
1
168-RD-14
200-BK-18
168-RD-14
H
ATCH START
AID SW
111-4784
168-RD-18
185-YL-18
L4
200-BK-18
L5
2
ATCH AUX SW
H
L11
ATCH
SWING CONT SW
111-4788
115-PK-14
H
H
H
ATCH O.W.D.
132-1828
H
BACKUP
EPR VALVE SW
114-0421
H H
BACKUP
GOV SW
110-7884
ATCH SEAT
HEATER SW
111-4783
H
506-PU
506-PU
A
L22
J
5
11
1
9
7
3
A
J
176-YL
B
A
308-YL-18
A 152-7674 C-2
120-YL
124-GN-14
118-GY
129-BU-18
191-WH-14
149-PU
168-RD-14
105-RD
114-RD-18
107-RD
140-BU
196-BU
112-PU-14
112-PU-14
112-PU-14
308-YL-18
112-PU-14
112-PU-14
185-YL-18
112-PU-14
151-GN-18
112-PU-14
112-PU-14
200-BK-18
189-RD-14
111-RD-14
200-BK-18
151-GN-18
547-OR-18
198-PK-18
546-BU-18
150-RD-18
154-RD-18
LEFT SW
C
B
A
198-PK-18
168-RD-18
AC
616-BU
200-BK
200-BK-18
322-GY-18
546-BU-18
RIGHT SW
L16
MULTISWITCH JOSTICK
122-4829
198-PK-18
547-OR-18
198-PK-18
J
200-BK
NEUTRAL START
LIMIT SW
111-4799
HORN SW
128-2134
200-BK-18
B
320-OR-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-14
L976-GN-18
616-BU
365-YL-18
A
C
AC 132-1827 A-4
200-BK-18
322-GY-18
322-GY-18
322-GY-18
200-BK-18
607-PK-18
322-GY-18
200-BK-18168-RD-14
200-BK
200-BK-18
325-PK-18
200-BK-14
323-WH-14
325-PK-18
365-YL-18
L976-GN-18
112-PU-14
112-PU-14
112-PU-14
112-PU-14
L4
112-PU-14
107-RD
196-BU
320-OR-18
151-GN-18
114-RD-18
365-YL-18
365-YL-18
L976-GN-18
L976-GN-18
200-BK
200-BK-18
ATCH AUX SW
8630-BU-18
615-YL
A758-BR-18
118-GY
115-PK-14
111-RD-14
168-RD-14
149-PU
140-BU
U 116-0098 A-4
365-YL-18
307-OR-18
A756-PU-18
615-YL-18
A756-PU-18
200-BK-18
191-WH-14
147-PU-18
8630-BU-18
L976-GN-18
L976-GN-18
575-YL-18
152-BU-18
576-PK-18
A755-PK-18
147-PU-18
A587-YL-18
L973-GN-18
124-GN-14
118-GY
129-BU-18
105-RD
185-YL-18
113-OR-18
633-BU-18
N923-GY-14
172-RD-18
124-GN-14
200-BK-18
105-RD
A586-OR-18
168-RD-18
615-YL-18
615-YL-18
200-BK-18
200-BK-18
112-PU-14
124-GN-18
124-GN-18
113-OR-18
501-GN-18
103-RD
519-PK-18
509-WH-18
508-PU-18
A425-YL-18
322-GY-18
150-RD-18
K912-GN-18
511-BR-18
616-BU
201-BK-18
CONT O.W.D.
132-5096
586-BR-18
512-GN-18
A424-WH-18
A425-YL-18
200-BK
CONSOL SW
SENSOR 2
GND
SENSOR 1
6
5
+ 24V
4
3
2
1
L16
L54
L55
L20
L19
L3
103-RD-18
L16
L40
L38
L21
L20
L19
L3
L18
L3
L19
L16
L20
L45
308-YL-18
5
4
3
2
1
A
BU-18
A424-WH-18
200-BK-18
8630-BU-18
FINE SWING SOL
107-7056
519-PK-18
519-PK-18
154-RD-18
189-RD
172-RD-18
L22
L15
K905-RD-14
L56
111-RD-14
150-RD-18
L38
L17
616-BU
200-BK
L40
308-YL-18
L16
200-BK-18
200-BK-18
L16
200-BK-18
519-PK-18
200-BK-18
200-BK-18
BLOCK AS.
121-1023
L3
961-BR-18
L25
L40
L38
L21
L20
L19
L3
L18
L18
L3
L19
L20
L21
L38
129-BU-18
308-YL-18
200-BK-18
152-BU-18
124-GN-14
118-GY
112-PU-14
308-YL-18
120-YL
OPERATOR STATION
200-BK-18
607-PK-18
115-PK-14
191-WH-14
2
4
114-RD-18
L40
L16
1
107-RD
3
105-RD
961-BR-18
MOTOR
L20
L19
961-BR-18
200-BK-14
7
8630-BU-18
L25
-
4
K911-PK-18
590-GY-18
L20
615-YL-18
6
200-BK-18
N923-GY-18
9
L16
200-BK-18
403-GN-18
3
1
8
129-BU-18
C538-OR-18
C537-GN-18
S
5
2
200-BK-18
500-BR-18
201-BK-18
118-GY
200-BK-18
524-BU
633-BU-18
638-WH
139-OR-18
WW
WIPER CONT
127-9838
323-WH-14
B
500-BR-18
506-PU
177-RD-8
+
168-RD-14
168-RD-14
177-RD-8
200-BK
616-BU
L16
LOWER WIPER MOTOR
131-0398
L40
L38
L21
L40
A
152-BU-18
308-YL-18
200-BK-18
113-OR-18
791-PK-18
AD 128-8936 I-11
786-GN-18
306-GN-18
A586-OR-18
501-GN-18
590-GY-18
147-PU-18
149-PU
140-BU
L38
177-RD-8
A588-GN-18
306-GN-18
6
A
154-RD-18
C537-GN-18
K905-RD-14
K905-RD-14
C538-OR-18
210-BK
135-BU
120-YL
L20
L3
L19
A424-WH-18
B
325-PK-18
2
AB
4
1
200-BK-18
386-PK-18
1
386-PK-18
2
B
386-PK-18
2
1
496-WH-18
189-RD
172-RD-18
3
L20
L5
L11
L12
H
1
L6
E
CAB
U U
ATCH
REFUELING
RELAY 1
111-4871
L18
PLATFORM
A
E
E
+
F/C SOL
(PROP.)
137-6464
R
L19
U
HYD
LOCK SOL
121-1491
L15
L38
L15
TO ATCH SPEAKER(L)
FOR OUTSIDE JAPAN
+B
L. CHASSIS
L. BOOM
306-GN-18
WASH
W. LOW
W. INT
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
GND IN
WASH SW
+24 IN
MOT WASHER
WIPER SW
OUTPUTS
INTER SW
WIND SW
TO ATCH SPEAKER(R)
FOR OUTSIDE JAPAN
961-BR-18
200-BK-18
506-PU
200-BK
L3
L19
954-GN-18
L975-PK-18
AB
K997-BU-18
326-RD
L20
L19
L3
L21
L20
L19
L3
L18
L3
L18
200-BK-18
AB
B
326-RD
L13
L13
L12
L11
L9
L9
L8
E
K997-BU-18
L16
K905-RD-18
K905-RD-18
L14
L1
A
E
L1
SW INPUT
NOTE G : USE WITH A/C UNIT
B
L2
A
L1
WINDSHIELD SW
9G-2795 (NOTE E)
K905-RD-18
L20
AB
ATCH
BOOM LAMP
5I-8250
K905-RD-14
L4
L
CHASSIS
OPERATOR STATION
S4
S3
S2
S1
COM
G (NOTE B)
AB 125-4873 A-2
L
ATCH
REFUELING PUMP
123-3928
ATCH
REFUELING
START SW(NO)
6T-9442
T
R
R
HORN
7Y-3919
R
G (NOTE B)
K
K
+
-
1
2
ATCH
REFUELING
RELAY 2
111-4871
H
R
MONITOR
106-0172
SWITCH PANEL
111-4800
KEY SW
9G-7641
H
TT
ATCH
REFUELING
STOP SW(NC)
9X-4184
L2
A/C PHOTO
SENSOR
128-2162
(NOTE G)
L3
ATCH AUX CKT
200-BK
-
L2
UU 111-4826 F-11
A
200-BK-18
B
200-BK
118-YL
SERVICE
METER
6T-7337
CHASSIS
LAMP
5I-8251
326-RD
THROTTLE
POS SW
106-0107
ATCH
BOOM LAMP
5I-8250
524-BU
EE
E
R
C
S
B
E
524-BU
OFF
C
ON
ST
L970-GY-18
CIGAR
LIGHTER
9W-0335
1
2
2
1
HORN
7Y-3920
E97638
THIS SCHEMATIC IS FOR THE 320B-HYD EXCAVATOR.
(116-0212 V 01)
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 Gauge.
LIGHT IN 24V
LIGHT OUT 12V
CONN 8
CONN 3
CONN 4
CONN 7
CONN 6
CONN 5
CONN 46
CONN 2
CONN 1
CONN 9
CONN 11CONN 10
CONN 17
CONN 14
CONN 16
CONN 20
CONN 19
CONN 18
CONN 15
CONN 32
CONN 33 CONN 34
CONN 24
CONN 23
CONN 22CONN 21
CONN 44
CONN 45CONN 40CONN 39CONN 38CONN 37CONN 36CONN 35
CONN 13
CONN 25
CONN 26 CONN 27 CONN 28
CONN 12
CONN 29 CONN 41
CONN 42 CONN 43
CONN 31CONN 30
A
B
C
D
E
F
I
H
G
A
B
C
D
E
F
I
H
G
101112 9 8 7 6 5 4 3 2 1
101112 9 8 7 6 5 4 3 2 1
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITOR CIRCUIT. (EMS)
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
OPERATOR INTERLOCK CIRCUIT.
ENGINE SHUTDOWN CONTROL CIRCUIT.
START AID CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.