320B & 320B L EXCAVATOR ELECTRICAL SYSTEM SCHEMATIC

Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Distribution Circuits Lighting Circuits
101 RD Bat (+) (Not Application Specific) 578 BU Washer - Aux
103 RD Dome Lamp Ckt 586 BR Aux Hyd - Close
105 RD Key Start Sw 590 GY Wiper SW To Intermittent Module
107 RD Eng Shut - Down Fire Suppr 592 BU DC/DC Converter Power Output
109 RD Alt Output (+) Term. A513 RD DC/DC Converter Memory Output
111 RD Engine Pump Control Ckt A537 PK Seat Heater (Resistive Element In Cushion)
112 PU Main Power Rly Output A579 OR Wiper Motor +
113 OR Opr Mon Panel VMIS B+ Switched A580 BR Wiper Motor -
114 RD Warning Horn (Forward) A581 GN Wiper Motor Raise
115 PK Cab / Chassis Ckt A582 PU Wiper Motor Stop
118 GY Washer / Wiper Ckt A583 YL Power Window Interlock To Wiper Cont
120 YL Converter Ckt A584 BU Front Window Limit SW To Wiper Cont
124 GN A/C / Heater Ckt A586 OR Wiper SW To Wiper Cont
129 BU Cigar Lighter Ckt A587 YL Power Window Cont To Safety Sol Relay
135 BU 12V 5A Output Ckt A588 GN Safety Sol Relay To Sol
140 BU Lubricator Ckt A589 OR Power Window Up
147 PU Fine Swing / Flow Control Ckt A590 BU Power Window Down
149 PU Boom Lamp Ckt A591 PU Rear Window Limit SW
150 RD Bat (+) C468 BU Engine Oil Level
151 GN Hyd Lock / Neutral Start Ckt C537 GN Turn Signal SW To Flasher
152 BU Lower Washer / Wiper Ckt C538 OR Hazard Indicator
154 RD Neutral Start / Neutral Start Ckt 607 PK Flood Lamp - Front
168 RD Refueling Pump Ckt 615 YL Cab Flood Lamp/Rops
172 RD Engine Governor 616 BU Bucket Flood Lamp/Boom Flood Lamp
175 RD Fan Ckt Control Circuits
176 YL Aux Ckt 763 BU Torque Converter SW
177 RD Main Brkr 786 GN Eng Speed Cont - Hi Press SW
180 GN Aux Ckt 788 YL Eng Speed (+)
185 YL Backup Ckt 791 PK Eng Speed Cont - Lo Sol
189 RD Hyd Lock Ckt A718 PU Start Aid Coolant Sensor Signal
191 WH Power Window Ckt A755 PK Throttle SW #1
196 BU Insp. Lamp Ckt A756 BU Throttle SW #2
Ground Circuits A757 GY Throttle SW #3
200 BK Main Chassis A758 BR Throttle SW #4
201 BK Operator Monitor Return A761 PU Electronic Pump Cont Throttle Ground
235 BK Electronic Pump Ctrl Gnd A762 PU Electronic Pump Cont Eng Speed Ground
Basic Machine Circuits A768 BU Pump Control Valve #1 (+)
304 WH Starter Relay No. 1 Output A769 GY Pump Control Valve #2 (-)
306 GN Starter Relay Coil To Neut Start SW Or A770 PK Electronic Pump Control Bypass SW To Resistor
307 OR Key Start SW To Neutral Start SW Or A771 PU Float SW
308 YL Main Power Relay Coil 877 YL Glow Plug Magnetic SW To Glow Plug
309 GY Alternator Regulator Term. 950 BR Right Console Compactor SW To Relay/Diode
310 PU Start Aid SW To Start Aid Sol 951 PK Right Cont Handle SW To Relay/Diode
320 OR Horn Relay Coil To SW 954 GN Right Console Eng Throttle SW To Relay/Diode
321 BR Backup Alarm Lamp Travel Alarm F771 OR Backup SW
322 GY Warning Horn (Forward) F772 WH Backup SW
323 WH Fuel Pump Power F773 OR Governor Accel
325 PK Fuel Pump Relay Cut-Out F774 WH Governor Decel
326 PU Key Start SW "C" Term. G973 OR Boom Raise Press SW to Crush Press SW
330 YL Neutral Start Relay Coil G974 WH Crush Sol to Demolition Relay
329 YL Fuel Pump To SW G975 YL Crush Press SW to Demolition Relay
365 YL Fuel Pump Relay To Switch J703 PK Alt Pulse Sig To Anti-Start Relay (was D746 PK)
Monitoring Circuits K904 GN Pump Discharge - Signal
403 GN Alternator (R) Term. K905 RD Pump Discharge - +B
405 GY Opr Mon Oil Press. (Low Setting) K906 GN SW To SW (Generic)
412 BU Opr Mon Cool Flow/Ds2 App Spec)(Pin 26)HEUI-ADEMI K907 BU XMSN Cont Fwd SW To Gnd
430 BU Opr Mon Air Filter K909 BU XMSN Cont Rev SW To Gnd
487 OR Hyd Oil Flow SW K911 PK XMSN Cont Speed 2 SW To Gnd
491 PK VMIS Hyd Oil Temp Sensor K912 GN XMSN Cont Speed 3 SW To Gnd
492 GY VMIS Coolant Temp Sensor Signal K915 GN XMSN Cont Speed 4 SW To Gnd
495 GN VMIS Fuel Level Signal K997 BU XMSN Cont Neut SW To Gnd
496 WH Opr Mon Panel Hyd Oil Level L908 OR XMSN Cont Pk Brk Lever SW To Gnd
Accessory Circuits L909 BU Impl Cont SW To Gnd N.O.
501 GN Wiper - Front (Low) L968 OR Impl Cont SW To Gnd N.C.
506 PU Washer - Front L969 WH XMSN Cont Speed 1 SW To Gnd
508 PU Radio Speaker - Left L970 GY Injector Diode To Injector 14
509 WH Radio Speaker - Left (Common) L971 GN Impl Cont Lift Proportional Sol
511 BR Radio Speaker - Right L972 BU Impl Cont Lower Proportional Sol
512 GN Radio Speaker - Right (Common) L973 GN Impl Cont Sol Return
513 OR A/C Compressor/Refrigerant Pressure SW L974 GN Impl Cont Pilot Press Sol
519 PK Thermostat To Refrigerant Press. SW L975 OK Serial Data (Transmit)
530 OR Washer Right L976 GN Serial Data (Receive)
575 YL Wiper - Aux (Park) L977 YL XMSN Shift Sol No. 5 or 4
576 PK Turn Signal SW To Flasher L978 GY XMSN Shift Sol No. 6
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
106-0179
Travel Pressure
Implement Pressure
1520 ± 98 kPa
220.5 ± 14 psi
1127 kPa Min
163.5 psi
Normally Open
106-0180 Boom Raise Pressure
2646 ± 196 kPa
383.8 ± 28.4 psi
2156 ± 196 kPa
Normally Open
106-0181
Flow Control Pressure
Aux. Hydraulic Pressure
Hammer Pressure
490 ± 49 kPa
71 ± 7.1 psi
290 kPa
42 psi
Normally Open
113-344 Refrigerant High/ Low Pressure
196 ± 1340 kPa
28.4 ± 455.4 psi
-
-
Normally Open
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
102-8016 Resistor: Backup 47.0 ± 2.35
107-7056 Solenoid: Fine Swing 34.0 ± 0.5
111-9916 Solenoid: Engine/Pump Control 11.7 ±1.2
121-1490 Solenoid:
Level Finish
Trenching
32±3.2
121-1491 Solenoid:
Hydraulic Lock
Swing Brake
Travel Speed
32±3.2
122-4459 Solenoid: Flow Control 34.3 ± 1.7
¹ At room temperature.
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Actuator - Engine Gov A-9 1 Sender - Hydraulic Oil Temp A-5 E
Air Inlet Heater C-8 2 Sensor - A/C Photo F-1 A
Alarm - ATCH Travel G-9 3 Sensor - Air Inlet Heater Coolant Temp C-9 21
Alternator B-8 4 Sensor - Fuel Level A-5 23
Antenna ATCH C-6 5 Sensor - Pump Discharge Press B-8 24
Assembly - Terminal Block F-8 D Socket 12V H-6 A
Batteries - 12VDC I-8,H-8 6 Solenoid - A/C Clutch C-9 26
Breaker - Alternator I-8 D Solenoid - ATCH Crush D-8 31
Breaker - Main I-8 D Solenoid - ATCH Flow Control D-7 29
Cable - ATCH Antenna G-6, I-3 5 Solenoid - Fine Swing E-7 28
Control - ATCH Power Window C-6 15 Solenoid - Hydraulic Lock I-1 G
Control - Engine/Pump F-2 7 Solenoid - Level Finish A-7 F
Controller - Wiper/Washer E-1 A Solenoid - Swing Brake E-7 32
Converter - Voltage H-6 9 Solenoid - Travel Speed A-7 F
Converter ATCH I-3 8 Solenoid - Trenching A-7 F
Dial - Engine Speed E-3 B Switch - A/C Panel H-5 C
Diode A-3 18 Switch - Air Cleaner Flow H-9 35
Diode - Main Relay H-7 D Switch - ATCH Refueling Start A-4 42
Fuses I-4,5,6 C Switch - ATCH Refueling Stop A-4 44
Heater - ATCH Seat with Seat Heater F-4 43 Switch - ATCH Fine Swing Control D-4 B
Horn A-2 10 Switch - ATCH Hammer H-1 G
Lamp - Cab G-1 12 Switch - ATCH Heater Panel H-5 C
Lamp - Chassis A-2 13 Switch - ATCH Lower Washer D-3 B
Lighter E-1 A Switch - ATCH Lower Wiper D-3 B
Meter - Service F-1 A Switch - ATCH Power Window limit B-6 A
Monitor F-1 A Switch - ATCH Refueling A-4 41
Motor - ATCH Lower Washer I-9 D Switch - ATCH Seat Heater D-4 B
Motor - ATCH Lower Wiper H-1 G Switch - Aux Hydraulic Pressure H-1 G
Motor - Starter A-9 14 Switch - Boom Raise Pressure D-8,D-7 34
Motor - Washer I-9 D Switch - Control Pressure H-1 G
Motor - Wiper E-1 A Switch - Coolant Level H-9 36
Pickup - Engine Speed B-9 29 Switch - Crush Pressure #1 H-1 G
Pump - ATCH Auto Lubrication H-9 16 Switch - Crush Pressure #2 G-1 G
Pump - ATCH Refueling A-2 17 Switch - Engine Oil Press B-9 38
Radio - ATCH 12VDC I-3 C Switch - Flow Control Pressure H-1 G
Relay - ATCH Flow Control E-7 D Switch - Horn I-1 C
Relay - ATCH Refueling Power A-3 18 Switch - Hydraulic Control D-4 C
Relay - ATCH Refueling Start A-3 19 Switch - Hydraulic Oil Filter A-5 E
Relay - ATCH Refueling Stop A-3 20 Switch - Hydraulic Oil Level A-5 E
Relay - Boom Lamp I-7 D Switch - Implement Pressure D-8 39
Relay - Cab/Chassis Lamp I-7 D Switch - Key F-2 B
Relay - Demolition E-8 D Switch - Neutral Start Limit I-1 C
Relay - Fan I-8 D Switch - One Touch Low Idle F-2 B
Relay - Heater F-7 D Switch - Power Window Limit D-3 A
Relay - Horn I-7 D Switch - Travel Pressure D-8 45
Relay - Hydraulic Lock Solenoid I-7 D Switch - Window Limit D-1 A
Relay - Main G-7 D Switch Panel F-2 B
Relay - Neutral Start F-7 D Switch- Refrigerants Low Pressure I-9 40
Relay - Start F-8 D Unit - A/C, Heater H-6 21
Relay - Start Cont E-8 D Unit - ATCH Heater H-5 46
Relay - Timer E-7 D Unit - Heater Control I-7 D
Resistor - Backup I-7 D Valve Proportional Reducing A-7 F
Sender - Coolant Temperature B-8, B-9 22
Machine locations are repeated for components located close together.
A Located in the cab.
B Located in the lefthand console.
C Located in the righthand console.
D Located on or near relay panel.
E Located on or near hydraulic oil tank.
F Located on or near pilot manifold.
G Located on or near bottom platform.
Component Location
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
37
35
33
34
36
38
7
F
39
40
41
42
43
44
45
46
47
48
49
50
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
29
30
31
32
37
35
33
34
36
38
7
F
39
40
41
42
43
44
45
46
47
48
49
50
G
G
33
12
11
10
28
Machine Harness Connector And Component Locations
SENR9258-02
November 1999
320B Excavators
Electrical Systems
320B:
AED1-UP
3MR1-UP
4MR1-UP
4NR1-UP
5BR1-UP
6CR1-UP
9KR1-UP
1CS1-UP
8ES1-UP
9CS1-UP
4XW1-UP
5GW1-UP
2WZ1-UP
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 A-9 1
CONN 2 F-9 D
CONN 3 F-9 14
CONN 4 G-9 D
CONN 5 G-9 D
CONN 6 H-8 D
CONN 7 G-8 A
CONN 8 G-8 A
CONN 9 G-9 A
CONN 10 G-6 G
CONN 11 C-6 A
CONN 12 C-6 A
CONN 13 C-5 A
CONN 14 C-5 A
CONN 15 F-5 A
CONN 16 F-5 G
CONN 17 F-5 A
CONN 18 F-5 G
CONN 19 F-4 G
CONN 20 F-4 G
CONN 21 H-5 G
CONN 22 H-5 G
CONN 23 H-4 G
CONN 24 H-4 G
CONN 25 H-4 G
CONN 26 H-4 G
CONN 27 B-4 23
CONN 28 A-4 42
CONN 29 A-4 20
CONN 30 B-3 47
CONN 31 B-3 48
CONN 32 C-2 49
CONN 33 C-2 G
CONN 34 C-2 G
CONN 35 C-2 G
CONN 36 B-2 D
CONN 37 E-8 D
CONN 38 E-8 D
The connectors shown in this chart are for harness to harness
connectors. Connectors that join a harness to a component
are generally located at or near the component. See the
Component Location Chart.
Code
Description Of Problems
1301
Engine oil pressure too low
3102
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 is shorted to body ground
2301
Governor actuator feedback signal is not stable
2302
Governor actuator feedback signal deviates
2303
Governor actuator does not move
2304
Calibration data error
3201
Monitor RAM is not normal
4101
Electric power supply to the controller is too much(43 volts)
4102
Over-current in proportional reducing valve
4103
Proportional reducing valve circuit is open
4105
Over-current in digital output (trenching solenoid)
4106
Over-current in digital output (fine control solenoid)
4107
Over-current in digital output (Travel speed change solenoid)
4108
Over-current in digital output (travel alarm)
410A
Over-current in digital output (swing brake solenoid)
4201
Engine speed is not normal
4202
Engine coolant temperature sensor is shorted to body ground
4203
Hydraulic oil temperature sensor is shorted to body ground
4204
PWM sensor of pump delivery pressure is open in circuit
4207
PWM sensor of pump delivery pressure is open in circuit
420A
Fuel sensor is shorted to 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 to much time to respond to controller's signal
A203
Communication is abnormal in controller
Real Time Error Codes
Related Electrical Service Manuals
Title Form Number
Engine/Pump Control SENR9291
Starting and Charging RENR1007
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.
©
1999 Caterpillar
All Rights Reserved
Printed in U.S.A.
200-BK-18
306-GN-18
2
1
309-GY-18
616-BU
322-GY-18
607-PK-18
304-WH-8
877-YL-4
101-RD-4
109-RD-6
586-BR-18
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
114-RD-18
A770-PK-18
200-BK
140-BU
149-PU
147-PU-18
107-RD
103-RD-18
114-RD-18
191-WH-14
115-PK-14
120-YL
118-GY
124-GN-14
129-BU-18
954-GN-18
954-GN-18
954-GN-18
200-BK-18
235-BK-14
200-BK-14
103-RD-18
A587-YL-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
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
151-GN-18
129-BU-18
118-GY
191-WH-14
103-RD-18
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
519-PK-18
113-OR-18
185-YL-18
512-GN-18
511-BR-18
508-PU-18
509-WH-18
519-PK-18
124-GN-14
103-RD-18
120-YL
113-OR-18
185-YL-18
129-BU-18
118-GY
124-GN-14
200-BK-14
519-PK-18
103-RD-18
191-WH-14
191-WH-14
403-GN-18
403-GN-18
403-GN-18
403-GN-18
200-BK-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
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
576-PK-18
575-YL-18
578-BU-18
A590-BU-18
A589-OR-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
403-GN-18
487-OR-18
A761-PU-18
K904-GN-18
496-WH-18
430-BU-18
495-GN-18
491-PK-18
492-GY-18
405-GY-18
321-BR-18
C468-BU-18
412-BU-18
763-BU-18
A762-PU-18
788-YL-18
A771-PU-18
A586-OR-18
501-GN-18
590-GY-18
A589-OR-18
A590-BU-18
200-BK-18
200-BK-18
147-PU-18
147-PU-18
140-BU
149-PU
168-RD-14
114-RD-18
151-GN-18
196-BU
107-RD
112-PU-6
114-RD-18
168-RD-14
112-PU-14
112-PU-14
112-PU-14
124-GN-14
120-YL
200-BK-18
103-RD-18
140-BU
149-PU
168-RD-14
114-RD-18
151-GN-18
196-BU
107-RD
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
191-WH-14
Y/W
Y/G
B
185-YL18
196-BU
200-BK-18
151-GN-18
200-BK-18
200-BK
K909-BU-18
A587-YL-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
RELAY PANEL
786-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
308-YL-18
A718-PU-18
616-BU
149-PU
786-GN-18
322-GY-18
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
306-GN-18
306-GN-18
200-BK-18
111-RD-14
K909-BU-18
307-OR-18
200-BK-18
189-RD-14
200-BK-18
112-PU-14
112-PU-14
112-PU-14
149-PU
140-BU
200-BK-18
200-BK-18
200-BK-14
103-RD-18
147-PU-18
200-BK-18
200-BK-14
200-BK-14
H
G
I
403-GN-18
112-PU-14
151-GN-18
112-PU-14
185-YL-18
112-PU-14
112-PU-14
112-PU-14
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
322-GY-18
786-GN-18
149-PU
616-BU
A718-PU-18
306-GN-18
310-PU-18
200-BK-18
308-YL-18
196-BU
140-BU
107-RD
114-RD-18
615-YL
607-PK-18
791-PK-18
103-RD-18
168-RD-14
149-PU
191-WH-14
151-GN-18
200-BK-18
A588-GN-18 616-BU
149-PU
322-GY-18
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
A587-YL-18
321-BR-18
H
A
3
7
200-BK-18
9
1
11
5
A761-PU-18
BK
WH
K909-BU-18
8
9
6
A770-PK-18
5
12
11
H
A
4
10
10
2
9
8
12
7
6
11
1
5
2
1
4
3
2
1
200-BK-18
2
1
L975-PK-18
K909-BU-18
177-RD-6
109-RD-6
101-RD-6101-RD-6
4
3
5
6
A
H
115-PK-14
114-RD-18
114-RD-18
150-RD-18
115-PK-14
150-RD-18
K909-BU-18
786-GN-18
308-YL-18
308-YL-18
200-BK-18
FAN RELAY
111-4871
ALT
BREAKER
9S-0174
WW
F773-OR-18
BACKUP
RESISTOR
102-8016
HYD LOCK SOL RELAY
111-4871
CAB/CHASSIS LAMP RELAY
111-4871
60A
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
KEY SW.(ON)
HEATER
CONT UNIT
104-3204
VV
CHECK TERM.
RELAY
KEY SW.(START)
GND
INDICATOR
REGULATOR
TEMP.
YY (NOTE N)
AL (NOTE P)
SS
SS
MAIN
BREAKER
9S-0174
NOTE P: USE WITH COLD WEATHER FOR JAPAN.
320-OR-18
320-OR-18
320-OR-18
320-OR-18
320-OR-18
320-OR-18
175-RD-14
530-OR-18
530-OR-18
200-BK-18
530-OR-18
530-OR-18
530-OR-18
A586-OR-18
320-OR-18
AF
AF
F774-WH-18
W
200-BK-18
3
W
L909-BU
365-YL-18
168-RD-18
168-RD-18
325-PK-18
325-PK-18
365-YL-18
168-RD-18
325-PK-18
325-PK-18
2
1
AE
B
L908-OR
C
B
A
7
235-BK-18
L908-OR-18
L909-BU-18
A
B
C
12
MAC
2
1
1
2
AB
AB
AD
NOTE M: NOT NECESSARY FOR FLOW CONTROL.
147-PU-18
G973-OR-18
11
10
ATCH
BOOM RAISE
PRESS SW
106-0181 (NOTE M)
T
AC
112-PU-6
309-GY-18
200-BK-18
147-PU-18
6
1
3
5
AIH COOLANT
TEMP SENSOR
125-2982
B
2
1
GROUND
ON(KEY)1
2
AIR CLEANER SW
109-9330
ATCH
CRUSH SOL
(NOTE M)
2
7
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUND
+B
BK-18
BR-18
YL-18
B
C
AIR HEATER
5I-7746
8
9
4
B
H
GND
F/B
+B
ACCEL
AC
B
B
1
2
DECEL
6
A
ENG GOV
ACTUATOR
119-0633
AA
B
200-BK-18
B
B
KEY
2
1
REFRIGERANT
LOW PRESS SW
105-9344
(NOTE A, NOTE L)
ATCH AUTO
LUBRICATION PUMP
127-5264
ATCH
TRAVEL ALARM
3E-7738
ENG OIL
LEVEL SW
111-4760
1
2
2
1
B
B
COOLANT
LEVEL SW
096-0744
1
2
MOTOR
B
BATMTR
SG
STARTER
MOTOR
125-2988
WASHER
7T-8890
ATCH
LOWER WASHER
7T-8890
2
1
ENG SPEED
PICKUP
125-2966
AC
1
2
G974-WH-18
147-PU-18
BATTERY
3T-5760
POS NEGNEGPOS
A
G974-WH-18
G975-YL-18
AD
A/C CLUTCH
SOL
117-6353(NOTE L)
154-0490(NOTE K)
AC
MOTOR
ATCH
BATTERY
3T-5760
(NOTE C)
60A
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
L908-OR
320-OR-18
763-BU-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
DEMOLITION RELAY
111-4871 (NOTE M)
CONNECTOR
114-RD-18
A768-BU-18
A769-GY-18
ELECTRICAL CONNECTION
307-OR-18
1
2
101-RD-4
304-WH-8
403-GN-18
309-GY-18
492-GY-18
A718-PU-18
877-YL-4
A762-PU-18
788-YL-18
405-GY-18
513-OR-18
L909-BU
L908-OR
177-RD-14
177-RD-14
F774-WH-18
F773-OR-18
A761-PU-18
C468-BU-18
320-OR-18
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
177-RD-14
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L
200-BK
#
A770-PK-18
PP
W
AB
G975-YL-18
G973-OR-18
G973-OR-18
G975-YL-18
200-BK-18
147-PU-18
A718-PU-18
200-BK-18
308-YL-18
L909-BU
530-OR-18
308-YL-18
B
513-OR-18
200-BK-18
308-YL-18
308-YL-18
405-GY-18
L975-PK-18
308-YL-18
200-BK-18
310-PU-18
306-GN-18
A718-PU-18
788-YL-18
A762-PU-18
200-BK-18
177-RD-14
308-YL-18
308-YL-18 177-RD-14
AC
308-YL-18
AB
308-YL-18
200-BK-18
304-WH-8
200-BK-18
320-OR-18
RD-00
RD-00
1
2
235-BK
235-BK
PP
200-BK-18
PP
513-OR-18
200-BK-18
788-YL-18
A762-PU-18
308-YL-18
116-BR-14
200-BK-18
101-RD-4
ATCH CRUSH
PRESS SW1
106-0181 (NOTE M)
G973-OR-18
G975-YL-18
V
V
V
G975-YL-18
G973-OR-18
116-BR-14
308-YL-18
308-YL-18
G973-OR-18
105-RD-14
G975-YL-18
ATCH HAMMER
PRESS SW
106-0181
954-GN-18
200-BK-18
2
1
112-PU-6
950-BR-18
147-PU-18
501-GN-18
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
A586-OR-18
200-BK
W. INT (6)
235-BK
105-RD-14
105-RD-14
POS NEG NEGPOS
147-PU-18
147-PU-18
147-PU-18
950-BR-18
951-PK-18
1
L909-BU
A586-OR-18
530-OR-18
L908-OR
INT (6)
2
K909-BU-18
K909-BU-18
200-BK-18
177-RD-14
177-RD-14
172-RD-18
235-BK
L L
F
E
D
E
615-YL-18
200-BK-18
C
B
A
H
G
I
F
E
D
C
B
A
Y/G
Y/W
200-BK-14
9 8 7 6 5 4 3 2 1
9 8 7 6 5 4 3 2 1
CIRCUIT GROUPING
DESIGNATION
365-YL-18
ATCH CRUSH
PRESS SW2
106-0181 (NOTE M)
116-BR-14
AG
AF
191-WH-18
191-WH-18
RADIO
A718-PU-18
113-OR-18
309-GY-18
616-BU
322-GY-18
607-PK-18
DISCONNECT SW.
7N-0718
7N-0719(NOTE C)
105-RD-14
OUT 1
+B
IN 2
IN 1
GND
OUT 2
UU (NOTE N)
AK (NOTE P)
VV
WW
JJ
113-OR-18
UU (NOTE N)
AK (NOTE P)
YY (NOTE N)
AL (NOTE P)
XX
ZZ
(NOTE N)
AM
(NOTE P)
113-OR-18
5
4
6
1
7
2
12
1
191-WH
5
3
4
6
2
1
7
8
9
10
11
12
506-PU-18
8
2
10
11
3
4
9
113-OR-18
113-OR-18
TIMER RELAY
111-4870
7
MAIN RELAY
3T-0376
(NOTE N)
191-WH
6
578-BU-18
XX
5
4
5
NEUTRAL
START RELAY
111-4871
200-BK-18
951-PK-18
200-BK-18
MOTOR
A
START RELAY
125-1302
6
3
12
2
1
7
11
8
9
10
A
950-BR-18
DIODE
121-1022
308-YL-18
JJ KK
Z
Z
NOTE H: NOT NECESSARY FOR FINE SWING CONT.SW.
ATCH FLOW CONT.
RELAY
111-4871
1
3
2
4
147-PU
HEATER
RELAY
9X-8124
KK
147-PU
147-PU-18
168-RD-18
105-RD-14
Y
RR
Z
TT
113-OR-18
NOTE L: USE FOR JAPAN.
NOTE K: USE FOR OUTSIDE JAPAN.
(NOTE J)
403-GN-18
200-BK-18
P
NN (NOTE F)
NN (NOTE F)
NN (NOTE F)
329-YL-18
323-WH-14
168-RD-18
168-RD-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
119-0607 (NOTE L)
126-2978 (NOTE K)
L971-GN-18
L970-GY-18
L977-YL-18
L974-GN-18
L969-WH-18
168-RD-18
168-RD-18
168-RD-14
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
365-YL-18
306-GN-18
200-BK-18
306-GN-18
306-GN-18
200-BK-18
200-BK-18
K906-GN-18
177-RD-14
177-RD-14
B
147-PU-18
177-RD-14
177-RD-14
E
310-PU-18
325-PK-18
310-PU-18
310-PU-18
877-YL-4101-RD-4
177-RD-6
ATCH
HEATER UNIT
151-9680(NOTE L)
139-7258(NOTE K)
177-RD-14
200-BK-18
A
A
A
A
326-RD
496-WH-18
A768-BU-18
200-BK-18
BK
YL
172-RD-18
B
BA
A
115-PK-14
GG (NOTE C)
RD-00
RD-00
177-RD-14
200-BK-6
B
HYD OIL
FILTER SW
116-3660
GROUND
SIGNAL
+B
C
B
A
177-RD-14
BB
B
BBBB
2
1
177-RD-14
177-RD-14
177-RD-14
B
177-RD-14
177-RD-14
177-RD-14
506-PU-18
578-BU-18
177-RD-14
177-RD-14
177-RD-14
177-RD-14
ATCH
FLOW CONT.
SOL
121-6303
ATCH
FLOW CONT.
SOL
122-4459
FLOW CONT SOL
C
(NOTE N)
AJ
(NOTE P)
GROUND STRAP
132-1806
ATCH
FINE SWING
SOL
107-7056
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
AE
2
1
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
M
2
1
B
1
2
HYD OIL
TEMP SENDER
4I-5394
2
1
FUEL LEVEL
SENSOR
105-9911
AM
ENG
ATCH
REFUELING SW
5C-6108
2
1
B
2
1
HYD OIL
LEVEL SW
111-4760
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
2
TRAVEL
PRESS SW
106-0179
T
1
A
B
G
AL
AK
AJ
NOTE N: NOT USE WITH COLD WEATHER FOR JAPAN.
304-WH-8
200-BK-18
AJ
(NOTE P)
112-PU-18
AJ
(NOTE P)
ATCH
MAIN
RELAY
159-9108
(NOTE P)
ATCH
MAIN
RELAY
RESISTOR
163-6616
(NOTE P)
200-BK-18
1
2
13
12
10
7
6
5
8
11
4
177-RD-14
9
3
AH
200-BK-14
A586-OR-18
530-OR-18
200-BK
200-BK
200-BK-14
200-BK-14
12
11
177-RD-14
10
9
177-RD-14
D
8
3
177-RD-14
(NOTE K)
AG
513-OR-18
2
1
R/L
C537-GN-18
AE
329-YL-18
177-RD-6
168-RD-14
L52
L52 L52
172-RD-18
196-BU
111-RD-14
168-RD-14
168-RD-10
116-BR-14
147-PU
A
L909-BU-18
A
147-PU-18
118-GY
124-GN-14
12
4
10
2
6
235-BK-18
112-PU-14
200-BK-6
ATCH
REFUELING
POWER RELAY
3T-0376
DIODE
121-1022
200-BK-14
492-GY-18
L908-OR-18
200-BK-14
J703-PK-18
309-GY-18
K912-GN-18
K911-PK-18
403-GN-18
185-YL-18
615-YL-18
K911-PK-18
K912-GN-18
149-PU
120-YL
116-BR-14
A586-OR-18
877-YL-4
109-RD-6
403-GN-18
200-BK
135-BU
120-YL
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
129-BU-18
615-YL-18
506-PU-18
403-GN-18
A583-YL-18
A584-BU-18
A584-BU-18
A583-YL-18
A589-OR-18
A590-BU-18
200-BK-14
191-WH-14
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
615-YL
A587-YL-18
615-YL
506-PU-18
A587-YL-18
112-PU-14
112-PU-14
180-GN
189-RD-14
A589-OR-18
A590-BU-18
590-GY-18
501-GN-18
A586-OR-18
200-BK-18
191-WH-14
103-RD-18
103-RD-18
8
103-RD-18
508-PU-18
509-WH-18
200-BK
511-BR-18
113-OR-18
129-BU-18
512-GN-18
118-GY
129-BU-18
103-RD-18
103-RD-18
177-RD-14
A
140-BU
200-BK-18405-GY-18
168-RD-10
107-RD
103-RD-18
114-RD-18
403-GN-18
A589-OR-18
A590-BU-18
175-RD-14
308-YL-18
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K915-GN-18
K907-BU-18
J703-PK-18
115-PK-14
147-PU-18
200-BK-18
950-BR-18
309-GY-18
309-GY-18
147-PU-18
330-YL-18
403-GN-18
J703-PK-18
NOTE J
120-YL
191-WH-14
NOTE F: USE WITH ADD TANK.
SS
116-BR-14
FAN
175-RD-14
175-RD-14
177-RD-14
177-RD-14
175-RD-14
6
1
3
R
BR
A/C UNIT
154-0523(NOTE L)
130-0250(NOTE K)
4
5
2
ATCH HEATER
SWITCH PANEL
119-6826(NOTE L)
139-7261(NOTE K)
A/C SWITCH
PANEL
119-6828(NOTE L)
139-7207(NOTE K)
INSP LAMP
1
2
A
10A
15A
10A
10A
10A
10A
A A
ENG GOV
15A
7
8
1
6
5
4
3
2
PLATFORM
CHASSIS
GROUND STRAP
7G-1060
ATCH
ANTENNA CABLE
111-4846
PWR WINDOW
CAB/CHASSIS LAMP
CONVERTER
LOWER WASHER/WIPER
WASHER/WIPER
G G
CIGAR LIGHTER
A/C /HEATER
10A
HORN
FUSE
10A 9W-1442
15A 9W-1441
20A 9W-1446
30A 8T-9636
BACKUP
A
120-YL
200-BK
15A
DOME LAMP
KEY SW
REFUELING PUMP
BOOM LAMP
FINE SWING SOL
10A
175-RD-14
10A
30A
10A
10A
10A
10A
10A
10A
20A
10A
10A
10A
15A
615-YL-18
E/P CONT
HYD LOCK SOL
200-BK-14
10A
X
C538-OR-18
4
6
3
X
ATCH
12V 5A
SOCKET
121-0987
ATCH 12V 5A
CONVERTER
119-1733
2
5
1
12V MEMORY
24V MEMORY
24V IN
GND
GND
12V OUT
SHUTDOWN
AUX CKT
AUX CKT SW PANEL
LUBRICATOR
6
8
1
7
4
5
3
2
HYD LOCK SW
HH
H
H
H
H
FUSE BASE
111-4812
954-GN-18
506-PU-18
512-GN-18
235-BK-18
L909-BU-18
L908-OR-18
116-BR-14
116-BR-14
403-GN-18
152-BU
118-GY
403-GN-18
112-PU-6
152-BU
200-BK-14
177-RD-14
200-BK-18
511-BR-18
200-BK-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
A755-PK-18
763-BU-18
A756-BU-18
509-WH-18
508-PU-18
200-BK-18
103-RD-18
615-YL-18
113-OR-18
A771-PU-18
308-YL-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
308-YL-18
L975-PK-18
615-YL
200-BK-14
615-YL
NOTE C: USE WITH COLD WEATHER.
VV
200-BK-14
K997-BU-18
K997-BU-18
200-BK-18
200-BK
200-BK-18
200-BK-18
200-BK-18
506-PU-18
501-GN-18
129-BU-18
403-GN-18
147-PU
147-PU
200-BK-18
235-BK-18
K997-BU-18
147-PU
K997-BU-18
K997-BU-18
954-GN-18
191-WH-14
ATCH SPEAKER(L)
7Y-5505
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
103-RD-18
615-YL-18
A583-YL-18
A584-BU-18
A591-PU-18 A583-YL-18
A587-YL-18
A590-BU-18
A589-OR-18
L909-BU-18
L908-OR-18
487-OR-18
A584-BU-18
A584-BU-18
K904-GN-18
K905-RD-18
ATCH SPEAKER(R)
7Y-5505
152-BU
235-BK-18
C537-GN-18
200-BK-18
A591-PU-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 (RXD)
COOLANT SENSOR
9
20
10
28
31
26
13
30
29
35
40
2
6
39
6
24
25
22
15
ALTERNATOR (P TERM)
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS SW
36
SWING BRAKE SOL
23
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK)
7
CAB
8
RS485 - (LH JOYSTICK)
RS485 + (PEDAL)
9
10
RS485 + (SEMI AUTO)
RS485 - (PEDAL)
RS485 + (RADIO CONT)
17
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18
TRAVEL PRESS SW
HYD OIL FILTER INDICATOR
18
RS485 - (RADIO CONT)
RS485 + (ELEC GOV)
19
+B
+B
AIH INDICATOR
FINE SWING SW
BOOM RAISE PRESS SW
LEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS SW
32
33
25
KEY SW ON
RS485 - (ELEC GOV)
26
12
40
2
4
28
27
LOW IDLE SW
21
20
1
11
22
34
3
24
23
14
13
16
15
5
36
35
29
31
30
39
38
37
GND
GND
HAMMER PRESS. SW
RS232C (TXD)
KEY SW START
A
DOME LAMP
096-0721
2
3
4
5
6
1
8
7
37
4
3
OPTION SENSOR (PWM)
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
12
32
33
14
11
34
2
1
8
3
5
4
7
6
7
8
9
10
ATCH POWER
WINDOW LIMIT SW
117-6306 (NOTE D)
1
11
ATCH POWER
WINDOW CONT
117-6305
7
6
5
4
3
8
1
2
5
4
3
2
1
6
E
E
E
E
E
E D D
A A A
6
5
4
3
2
A587-YL-18
L6
L7
ATCH
ANTENNA
106-0036
R. LIMIT
GND
F. LIMIT
+B
WIPER
NEUTRAL
SW. DOWN
SW. UP
177-RD-14
PLATFORM
A
1
6
2
5
3
4
2
3
4
5
6
1
8
7
E
JOYSTICK +B OUT
BK-00
RD-00
RD-00
A
CHASSIS
GG
(NOTE C)
CC
BK-00
FF (NOTE C)
BB
EE (NOTE C)
AA
L16
L15
L16
B
B
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
BLOCK AS.
121-1023
AC
B
A
A
A
L16
L15
L50
403-GN-18
L45
RELAY PANEL
L909-BU-18
235-BK-18
L16
L15
C
(NOTE N)
AJ
(NOTE P)
Z
C (NOTE N)
AJ (NOTE P)
C (NOTE N)
AJ (NOTE P)
A
A
Y
L48
L47
189-RD
154-RD-18
111-RD-14
150-RD-18
L908-OR-18
115-PK-14
308-YL-18
115-PK-14
J703-PK-18
150-RD-18
114-RD-18
154-RD-18
189-RD
111-RD-14
K909-BU-18
A718-PU-18
116-BR-14
D
C
191-WH
L47
L47
J703-PK-18
111-RD-14
189-RD
154-RD-18
154-RD-18
189-RD
177-RD-14
111-RD-14
308-YL-18
RELAY PANEL
L48
A
B
B
B
B
B
ZLL
L51
L49
L49
L50
L51
L45
L44
L42
L41
L29
L30
L30
L29
L41
L42
L44
L30
L29
L41
L42
L44
N
5
168-RD-18
4
NN (NOTE F)
200-BK-14
200-BK-18
200-BK-14
200-BK-18
L976-GN-18
L976-GN-18
L976-GN-18
147-PU
365-YL-18
168-RD-18
200-BK-18
L973-GN-18
140-BU
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
519-PK-18
513-OR-18
308-YL-18
430-BU-18
200-BK-18
513-OR-18
519-PK-18
200-BK-18
412-BU-18
1
2
OR
PK
140-BU
200-BK
308-YL-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
200-BK-18
200-BK-18
200-BK-18
177-RD-14
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
951-PK-18
200-BK-18
200-BK-18
951-PK-18951-PK-18
951-PK-18
951-PK-18
951-PK-18
LL
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
JJ
GG
FF
EE
GROUND STRAP
132-1805
CC
BB
AA
CABLE AS.
1
YY
WIRE AS.
2
N
LL
2
1
M
L
K
J
H
G
F
E
D
C
B
615-YL-18
200-BK-18
200-BK-18
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
BLADE, SPADE, RING,
OR SCREW TERMINAL
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
CIRCUIT CONNECTED
IDENT PART NO. LOC
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
200-BK-18
607-PK-18
168-RD-14
487-OR-18
491-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
147-PU
NOTE E: NOT NECESSARY FOR ELECTRIC OPENABLE WINDSHIELD.
NOTE D: USE WITH ELECTRIC OPENABLE WINDSHIELD.
J703-PK-18
172-RD-18
A761-PU-18
F773-OR-18
F774-WH-18
J703-PK-18
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
513-OR-18
513-OR-18
200-BK
200-BK
308-YL-18
321-BR-18
519-PK-18
412-BU-18
430-BU-18
A537-PK-18
2
1
200-BK-18
586-BR-18
116-BR-14
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
105-RD-14
113-OR-18
AH
501-GN-18
590-GY-18
J703-PK-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
X
KK
152-BU
L973-GN-18
200-BK-18
147-PU-18
191-WH
K909-BU-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
H
200-BK-18
200-BK-18
200-BK-18
8
7
6
5
4
3
2
1
ATCH
SEAT WITH
SEAT HEATER
111-6458
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
G
G
AA
G
2
A
G
4
A
330-YL-18
200-BK-18
309-GY-18
J703-PK-18
403-GN-18
308-YL-18
308-YL-18
308-YL-18
147-PU
308-YL-18
SIS CONNECTOR
NOTE B: USE WITH SHORT BOOM.
309-GY-18
200-BK-18
200-BK-18
172-RD-18
3
L43
L44
B
CHASSIS
200-BK-18
WH/GN
WH/YL
A537-PK-18
172-RD-18
EE (NOTE C)
AA
L969-WH-18
L43
L43
K997-BU-18
B
CHASSIS
L28
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
105-RD-14
200-BK-18
200-BK-18
200-BK-18
330-YL-18
200-BK-18
A590-BU-18
A589-OR-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
L17
200-BK-18
200-BK-18
L17
B
L38
L37
L17
615-YL-18
615-YL-18
WH/BU
200-BK-18
GND
115-PK-14
150-RD-18
154-RD-18
172-RD-18
L40
L39
WW
615-YL-18
START CONT RELAY
094-2080
615-YL-18
L37L38
575-YL-18
576-PK-18
578-BU-18
177-RD-14
L973-GN-18
177-RD-10
152-BU-18
L39
200-BK-18
115-PK-14
200-BK-18
172-RD-18
189-RD
154-RD-18
150-RD-18
K907-BU-18
111-RD-14
K905-RD-14
L36
200-BK-18
200-BK-18
615-YL-18
615-YL-18
L21
586-BR-18
L20
147-PU
L19
YL
615-YL-18
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
XX
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L22
L18
G
L34
L34
L35
L20
L19
L3
L34
L36
L36
L35
L25
L25
L4
L33
326-RD
326-RD
L21
L32 L31 L10 L9 L8
A
L12 L13
G
L32
L31
GG
L33
L33
L33
L33
K915-GN-18
L20
L19
L3
L25
L4
L35
L32
L31
L4
L25
L3
L20
L4
L3
L19
L20
L25
L2
191-WH
K997-BU-18
K997-BU-18
K997-BU-18
615-YL-18
615-YL-18
L27
L26
L35
L27
L26
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
615-YL-18
A769-GY-18
R
152-BU-18
615-YL-18
A768-BU-18
E
A
L6
L30
K906-GN-18
L28
BK
615-YL-18
185-YL-18
L29
L29 L28
R
P
S
L
ZZ
310-PU-18
615-YL-18
615-YL-18
168-RD-14
200-BK-18
168-RD-14
191-WH
G
TT (NOTE H)
168-RD-18
185-YL-18
L7
L6
L5
L18
L3
L19
L21
L20
ATCH LOWER
WIPER SW
111-4785
ATCH LOWER
WASHER SW
111-4786
G
L11
ATCH FINE
SWING CONT SW
111-4788
115-PK-14
ATCH POWER
WINDOW SW
111-4789
GGGG
BACKUP
EPR VALVE SW
114-0421
G G
BACKUP
GOV SW
110-7884 ATCH SEAT
HEATER SW
111-4783
G
200-BK-14
590-GY-18
200-BK-18
615-YL
615-YL
615-YL
615-YL-18
615-YL-18
ATCH
CONVERTER
134-1346
TO RADIO
ATCH RADIO CONVERTER FOR OUTSIDE JAPAN
512-GN-18
509-WH-18
511-BR-18
508-PU-18
A513-RD-18
8
6
7
4
2
5
1
3
592-BU-18
GND
IGN
592-BU-18
A513-RD-18
200-BK-18
12V
MEM
24V
113-OR-18
103-RD-18
508-PU-18
200-BK-18
113-OR-18
103-RD-18
511-BR-18
6
4
2
5
1
3
ANTENNA
200-BK-18
509-WH-18
512-GN-18
A
8
7
1
2
3
4
5
6
A588-GN-18
200-BK-18
616-BU
200-BK
200-BK-18
322-GY-18
615-YL
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK
200-BK
A584-BU-18
A584-BU-18
200-BK-18
491-PK-18
487-OR-18
496-WH-18
200-BK-18
615-YL-18
491-PK-18
200-BK-18
200-BK-18
200-BK-14
200-BK
616-BU
SW INPUT
OPTION SENSOR (PWM)
200-BK-18
322-GY-18
322-GY-18
322-GY-18
200-BK-18
607-PK-18
200-BK-14
322-GY-18
168-RD-14
200-BK-18
325-PK-18
200-BK-14
323-WH-14
365-YL-18
ATCH RADIO FOR JAPAN
615-YL-18
615-YL-18
200-BK-18
A758-BR-18
118-GY
115-PK-14
111-RD-14
113-OR-18
103-RD-18
T
U
307-OR-18
A757-GY-18
615-YL-18
A756-BU-18
200-BK-18
200-BK
200-BK-18
ATCH
CAB LAMP
5I-8250
200-BK
575-YL-18
152-BU-18
576-PK-18
A755-PK-18
950-BR-18
L970-GY-18
152-BU
506-PU-18
200-BK-18
501-GN-18
200-BK-18
NN
322-GY-18
150-RD-18
176-YL
K912-GN-18
200-BK-18
616-BU
A584-BU-18
201-BK-18
200-BK-18
C
B
A
103-RD-18
308-YL-18
5
4
3
2
1
200-BK-18
320-OR-18
154-RD-18
189-RD
172-RD-18
L22
ATCH
AM/FM RADIO
(CASSETTE)
153-2503
L17
L15
L16
K905-RD-14
L22
111-RD-14
150-RD-18
200-BK
616-BU
616-BU
200-BK
B
151-GN-18
308-YL-18
200-BK-18
200-BK-18
200-BK-18
B
B
B
B
200-BK-18
519-PK-18
200-BK-18
BB
508-PU-18
509-WH-18
ALTERNATOR
5I-8071(NOTE L)
(35A)
5I-8085(NOTE K)
(50A)
511-BR-18
512-GN-18
L976-GN-18
200-BK-18
200-BK-18
308-YL-18
T
COOLANT TEMP
SENDER
5I-7578
NN
(NOTE F)
8
L
E
B
200-BK
A582-PU
200-BK-18
A581-GN
P
OPERATOR STATION
200-BK-18
607-PK-18
6
7
R
2
L976-GN-18
4
ALT
150-RD-18
B
154-RD-18
B
4
2
1
3
112-PU-6
A583-YL-18
A580-BR
5
1
200-BK-14
ENG OIL SW
5I-8005
3
K911-PK-18
590-GY-18
P
200-BK-18
403-GN-18
129-BU-18
C538-OR-18
C537-GN-18
200-BK-18
200-BK-14
200-BK-18
A584-BU-18
201-BK-18
ATCH
AM RADIO
136-4006
200-BK-18
L24
L24
P
ZZ (NOTE N)
AM (NOTE P)
A579-OR
SPEAKER (+)
309-GY-18
306-GN-18
200-BK-14
177-RD-8
L976-GN-18
NN
(NOTE F)
177-RD-8
200-BK
616-BU
615-YL
200-BK
615-YL
200-BK
L972-BU-18
200-BK-18
200-BK-18
113-OR-18
791-PK-18
V
786-GN-18
306-GN-18
590-GY-18
105-RD-14
200-BK-18
615-YL-18
200-BK-18
306-GN-18
6
A
154-RD-18
ATCH RADIO WITH CASSETTE DECK FOR JAPAN
ANTENNA
113-OR-18
103-RD-18
615-YL-18
508-PU-18
200-BK-18
511-BR-18
509-WH-18
512-GN-18
306-GN-18
6
3
5
4
2
1
1
2
7
8
C560-OR-18
C566-PK-18
SPEAKER (+)
6
7
AUX-SPEAKER(+)
8
4
1
5
2
B
2
RR
4
1
10
9
3
615-YL-18
113-OR-18
103-RD-18
200-BK-18
508-PU-18
509-WH-18
511-BR-18
512-GN-18
GND
SPEAKER (+)
SPEAKER (-)
ACC
ILLUMI
BACKUP
AUX-SPEAKER(-)
SPEAKER (-)
2
1
B
N
NN (NOTE F)
1
2
496-WH-18
189-RD
172-RD-18
L21
3
L20
L5
L11
L12
G
L6
D
CAB
U U
ATCH
REFUELING
START RELAY
111-4871
H
PLATFORM
A
ATCH POWER
WINDOW LIMIT SW
117-6306 (NOTE D)
D
D
D
+
G
ONE TOUCH
LOW IDLE SW
128-2134
R
L19
ATCH
FLOW CONT.
PRESS SW
106-0181
1
2
Y
U
H
L16
HYD
LOCK SOL
121-1491
L15
L17
L14
+B
L. CHASSIS
L. BOOM
306-GN-18
WASH
W. LOW
W. INT (3)
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
W. CCW
W. CW
REV
STOP
GND
WASH
ACC
WA+
LOW
WIPER CUT
RISE. S
INT (3)
ATCH
ANTENNA CABLE
111-4846
615-YL-18
K905-RD-14
K905-RD-14
SPEAKER (-)
BACK UP
WIPER
MOTOR
122-9603
GND
WIPER CONT
155-7042
NEUTRAL START
LIMIT SW
111-4799
HORN SW
128-2134
L15
L975-PK-18
RR
K997-BU-18
326-RD
Y
A
L20
L21
L19
L3
L18
L3
L18
RR
B
326-RD
L13
L13
L8
L10
L9
L8
D
K997-BU-18
L7
K905-RD-18
K905-RD-18
L14
L1
A
D
L7
L7
LL
132-1867
132-1866
150-7022
132-1865
153-2499
121-1033
125-4873
121-1034
111-4841
163-6681
132-1827
128-8970
128-8872
116-0243
140-0923
116-0227
153-2491
150-6999
4I-5396
111-4795
153-2555
153-2496
138-5134
116-0258
128-8877
150-6998
116-0096
116-0098
128-8971
150-7026
128-8879
E-8 (NOTE M)
D-7 (NOTE M)
H-3
H-1 (NOTE M)
H-3
H-1
A-2
F-8
I-3
F-8 (NOTE P)
A-4
A-2
E-7
G-1
A-1
B-2
H-4
D-3
A-1 (NOTE B)
G-1
D-1
F-8 (NOTE N)
A-3
H-6
A-4
C-2
A-4
A-4
A-2 (NOTE F)
H-3
D-7
NOTE G: USE WITH A/C UNIT.
B
L2
L1
WINDOW
LIMIT SW
124-3974 (NOTE E)
K905-RD-18
E
RR
ATCH
BOOM LAMP
5I-8250
K905-RD-14
L4
K
CHASSIS
OPERATOR STATION
S4
S3
S2
S1
COM
F (NOTE B)
NOTE J
K
ATCH
CAB LAMP
111-4813
5I-8250
SPEAKER (+)
ATCH
REFUELING PUMP
123-3929
ATCH
REFUELING
START SW(NO)
6T-9442
T
N
R
HORN
7Y-3919
LL
ACC (+)
N
F (NOTE B)
J
J
+
-
1
2
ATCH
REFUELING
STOP RELAY
111-4871
309-GY-18
G
N
MONITOR
106-0172
SWITCH PANEL
153-2500
KEY SW
9G-7641
G
TT
ATCH
REFUELING
STOP SW(NC)
9X-4184
L2
A/C PHOTO
SENSOR
128-2162
(NOTE G)
L3
2
1
ATCH LOWER
WIPER MOTOR
113-3452
+
-
ILLUMI (+)
L2
UU
I-3
I-9 (NOTE K)
D-4 (NOTE H)
F-8 (NOTE P)
I-8 (NOTE P)
U-8 (NOTE P)
H-3
I-8
F-8
F-8
I-8 (NOTE C)
H-8 (NOTE C)
A-8 (NOTE C)
I-8
I-8
A-8
I-8 (NOTE N)
F-8
F-8
F-8
F-8 (NOTE N)
F-8 (NOTE N)
111-4846
153-2492
116-0237
163-6693
163-6692
163-6691
153-2504
128-8936
111-4831
116-0233
116-0242
116-0080
128-8871
125-4727
116-0080
116-0228
128-8937
116-0234
111-4830
111-4829
128-8938
111-4826
S
200-BK-18
+1
-
MOTOR
SERVICE
METER
6T-7337
CHASSIS
LAMP
5I-8251
SPEAKER (-)
THROTTLE
POS SW
106-0107
ATCH
BOOM LAMP
5I-8250
MOTOR
DD
D
R
C
S
B
D
E
OFF
E
ON
ST
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
ATCH
AM/FM RADIO
153-2444
CIGAR
LIGHTER
9W-0335
1
2
2
1
ATCH
AUX HYD
PRESS SW
106-0181
A
L7
HORN
7Y-3920
L6
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
TO MACHINE STRUCTURE
NOTE J: NOT USED ON THIS MACHINE.
THIS SCHEMATIC IS FOR THE 320B-HYD EXCAVATOR
(116-0201 HE09)
CONN 1
CONN 4
CONN 5
CONN 3
CONN 2
CONN 8
CONN 9
CONN 6
CONN 7
CONN
10
CONN 11 CONN 12 CONN 13 CONN14
CONN 15
CONN 16 CONN 17
CONN 18 CONN 19
CONN 20
CONN 21 CONN 22 CONN 23 CONN 24 CONN 25
CONN 26
CONN 27
CONN 28 CONN 29
CONN 30
CONN 32 CONN 33 CONN 34 CONN 35
CONN 36
E94290
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITOR CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
AIR INLET HEATER CIRCUIT.
ENGINE PUMP CONTROL CIRCUIT.