330B L EXCAVATOR AURORA VERSION ELECTRICAL SCHEMATIC USED IN SERVICE MANUAL SENR8965

Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 A-9 26
CONN 2 F-9 D
CONN 3 F-9 D
CONN 4 G-9 D
CONN 5 G-9 D
CONN 6 G-8 D
CONN 7 G-8 D
CONN 8 G-8 D
CONN 9 F-8 D
CONN 10 C-6 22
CONN 11 C-5 22
CONN 12 C-5 F
CONN 13 C-4 F
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 F
CONN 31 B-3 6
CONN 32 A-3 6
CONN 33 B-2 25
CONN 34 Service Connector D-2 F
The connectors shown in this chart are for harness to harness connectors.
Connectors that join a harness to a component are generally located at or near
the component. See the Component Location Chart.
Code Description of Problems
1301 Engine oil pressure is too low.
1302 Engine coolant temperature is too high.
1303 Hydraulic oil temperature is too high.
1304 Air filter is clogged.
1305 Battery voltage is not normal.
2201 Governor actuator feedback sensor circuit is open or shorted to battery voltage.
2202 Governor actuator feedback sensor circuit is shorted to body ground.
2301 Governor actuator feedback signal is not stable.
2302 Governor actuator feedback signal deviates.
2303 Governor actuator does not move.
2304 Calibration data error.
3201 Monitor RAM is not normal.
4101 Electric power supply to the controller is too much (43 volts).
4102 Over-current in proportional reducing valve.
4103 Proportional reducing valve circuit is open.
4105 Over-current in digital output (trenching solenoid).
4106 Over-current in digital output (fine control solenoid).
4107 Over-current in digital output (travel speed change solenoid).
4108 Over-current in digital output (travel alarm).
410A Over-current in digital output (swing brake solenoid).
4201 Engine speed is not normal.
4202 Engine coolant temperature sensor is shorted to body ground.
4203 Hydraulic oil temperature sensor is shorted to body ground.
4204 PWM sensor of pump delivery pressure is shorted to body ground.
4207 PWM sensor of pump delivery pressure is open in circuit.
420A Fuel sensor is shorted to body ground
420B Fuel sensor is open or shorted to battery voltage.
420C Electric power supply is to low (below 23 volts).
420D Electric power supply is to high (above 32 volts).
420E Engine speed dial is not in one of the 10 specified positions.
4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal).
4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal).
4303 Engine stalls.
A201 Monitor communication is not normal.
A202 Monitor takes too much time to respond to controller's signal.
A203 Communication is abnormal in controller.
Real Time Error Codes
Related Electrical Service Manuals
Form Number
Alternator: (100-5047)
SENR2082
Engine/Pump Control
SENR9291
Starting and Charging
SENR9292
Starting Motor: (6V-5227)
Consist: 6V-5538
SENR4975
Title
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
102-8017 Resistor - Backup 52.0 ± 2.6
134-3998 Solenoid - A/C Clutch 17.6 ± 0.6
111-9916 Solenoid - Engine/Pump Control 11.7 ± 1.2
3E-7985 Solenoid - Engine Shutdown
Start (Latch) Coil 1.55 ± 0.15
Stop (Unlatch) Coil 10.3 ± 1.03
121-1491 Solenoid - Hydraulic LockSwing BrakeTravel Speed 32.0±3.2
121-1490 Solenoid - Level FinishTrenching 32.0 ± 3.2
3E-6332 Solenoid - Start Aid 6.0
¹ At room temperature unless otherwise noted.
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
7
F
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
7
F
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6449 Start Aid Coolant Temperature
38.0 ± 3.0°C
(100.4 ± 5.4°F)
27 °C MIN
(80.6 °F MIN)
Normally Closed
3E-6455 Engine Oil Pressure
90 ± 21 kPa
(13 ± 3.0 psi)
70 ± 21 kPa
(10 ± 3.0 psi)
A-B, Normally Open
A-C, Normally Closed
106-0179 Implement Pressure Travel Pressure
1225.00 ± 98.00 kPa
(177.67 ± 14.21 psi)
882.00 kPa MIN
(127.92 psi MIN)
Normally Open
106-0180 Boom Raise Pressure
2646.00 ± 196.00 kPa
(383.77 ± 28.43 psi)
2156.00 ± 196.00 kPa
(312.70 ± 28.43 psi)
Normally Open
106-0181 Aux 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 kpa¹
(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 tile 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).
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.
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Machine
Location
Actuator - Engine Gov A-9 1 Sensor - Engine Speed B-8 8
Alarm - Travel G-9 3 Sensor - Fuel Level A-5 13
Alternator C-8 4 Sensor - Pump Discharge Press B-8 14
Assembly - Terminal Block F-8 D Sensor - Sun Load F-1 E
Batteries - 12VDC H-8,I-8 5 Solenoid - A/C Clutch C-9 15
Breaker - Alternator I-8 D Solenoid - Eng/Pump Control A-7 16
Breaker - Main I-8 D Solenoid - Engine Shutdown B-8 8
Control - Engine/Pump F-2 C Solenoid - Fine Swing E-7 18
Controller - Wiper/Washer E-1 E Solenoid 0 Hydraulic Lock I-1 F
Converter - Voltage C-5 A Solenoid - Level Finish A-7 16
Diode - Main Relay H-7 D Solenoid - Start Aid H-9 19
Fuses I-4,5,6 B Solenoid - Swing Brake E-7 18
Ground - Cab B-5 22 Solenoid - Travel Speed A-7 16
Ground - Cab E-1 E Solenoid - Trenching A-7 16
Ground - Chassis A-3 8 Switch - Air Cleaner Flow H-9 20
Ground - Chassis A-8 7 Switch - Aux Hydraulic Pressure H-3 B
Ground - Chassis I-8 D Switch - Backup EPR Valve E-5 C
Ground - Platform G-2 F Switch - Backup Governor D-5 C
Ground - Platform H-1 F Switch - Boom Raise Pressure D-8 C
Ground - Relay Panel H-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 Press B-9 11
Lighter E-1 E Switch - Fine Swing Control D-4 C
Meter - Service F-1 E Switch - Horn I-1 B
Monitor F-1 E Switch - Hydraulic Control D-4 C
Motor - Lower Washer I-9 D Switch - Hydraulic Oil Filter A-5 12
Motor - Lower Wiper H-1 9 Switch - Hydraulic Oil Level A-5 12
Mcttor - Starter B-8 8 Switch - Implement Pressure D-8 18
Motor - Upper Washer I-9 D Switch - Key F-3 C
Motor - Upper Wiper C-5 23 Switch - Lower Washer D-4 C
Radio - 12VDC C-6,l-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 - Horn I-7 D Switch - Refrigerant Low Press C-9 19
Relay - Hydraulic Lock Solenoid I-7 D Switch - Start Aid D-5 C
Relay - Main G-7 D Switch - Start Aid Coolant Temp B-9 2
Relay - Neutral Start F-7 D Switch - Suction Line Shutoff Limit A-6 12
Relay - Start F-B D Switch - Throttle Position E-3 C
Relay - Timer E-7 D Switch - Travel Pressure D-8 18
Resistor - Backup I-8 D Switch Panel F-2 C
Sender - Coolant Temperature B-9 2 Unit - A/C, Heater G-5 21
Sender - Hydraulic Oil Temp A-5 12
Machine locations are repeated for components located close together.
A = Located in operator’s compartment.
B = Located in operator’s left console area.
C = Located in operator’s right console area.
D = Located in relay panel area.
E = Located in dash area.
F = Located under cab floor plate.
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Accessory Circuits (Continued)
101 RD Bat (+) A513 PK DC/DC Converter Memory Output
103 YL Aux Ckt A537 PR Seat Heater
105 BR Key Sw A571 PU Aux Ckt 1
107 WH Eng Shutdown A572 PK Aux Ckt 2
108 BU Aux Ckt A579 OR Wiper Motor (+)
109 OR Alt Output (+) Term A580 BR Wiper Motor (-)
111 YL Aux Ckt A581 GN Wiper Motor Raise
112 PU Main Power Rly Output A582 PU Wiper Motor Stop
113 OR Opr Mon Panel B (+) Switched A583 YL Pwr Window Interlock to Wiper Cont
114 GN Warning Horn (Forward) A584 BU Front Window Limit Sw to Wiper Cont
115 PK Aux Ckt A586 OR Wiper Sw to Wiper Cont
118 GY Aux Ckt A587 YL Pwr Window Cont to Safety Sol Relay
120 YL Aux Ckt A588 GN Safety Sol Relay to Sol
123 WH Aux Ckt A589 OR Power Window Up
124 GN A/C A590 BU Power Window Down
129 BU Aux Ckt A591 PU Rear Window Limit Sw
135 BU AuxCkt C513 OR Blower Motor (Med-Low)
140 BU AuxCkt C514 PK Power to Control (12 V)
147 PU Aux Ckt C515 BR Serial Communication (A)
149 PU Aux Ckt C516 GY Serial Communication (B)
150 OR Bat (+) C517 GN Ambient Temp Sensor
151 GN Aux Ckt C518 WH Cab Temp Sensor
152 BU Aux Ckt C519 OR Heater Coil Temp
154 WH Aux Ckt C520 PK Evaporator Coil Temp
168 GN Aux Ckt C521 PU A/C
172 GN Aux Ckt C523 BU A/C
176 OR Aux Ckt C524 WR A/C
177 OR Main Brkr C525 YL A/C
180 GN Aux Ckt C526 BR Blower Motor (Thermal Fuse)
185 YL Aux Ckt C536 PK Operator A/C On Lamp
189 WH Aux Ckt C537 GN A/C Photo Sensor (+) Sig
191 WH Aux Ckt C538 OR A/C Photo Sensor (-) Sig
196 BU Aux Ckt C539 YL A/C Control Sw IP1
Ground Circuits
C540 GY A/C Control Sw IP2
200 BK Main Chassis C541 GN A/C Control Sw IP3
201 BK Opr Mon Panel
Lighting Circuits
235 BK Elec Pump Ctrl Gnd 607 PK Flood Lamps - Front
A270 BK Operator Panel Sw Gnds 615 YL Cab Flood Lamp
Basic Machine Circuits
616 BU Boom Flood Lamp
301 BU Starter No. 1 Sol
Control Circuits
304 WH Starter Rly No. 1 Output 763 BU Torque Converter Sw
306 GN Starter Rly Coil 786 GN Eng Speed Cont
307 OR Key Sw to Neut Start Sw 788 YL Eng Speed (+)
308 YL Main Power Rly Coil 791 PK Eng Speed Cont
309 GY Alt Regulator Term A718 PU Start Aid Coolant Sensor Sig
310 PU Start Aid Sw to Start Aid Sol A755 PK Throttle Sw #1
311 WH Start Aid Sol to Temp Sw A756 BU Throttle Sw #2
320 OR Horn Rly Coil to Sw A757 GY Throttle Sw #3
321 BR Travel Alarm Lamp A758 BR Throttle Sw #4
322 GY Warning Horn (Forward) A761 PU Elec Pump Cont Gov Feedback
323 WH Fuel Pump Power A762 PU Elec Pump Cont Eng Speed Ground
325 PK Fuel Pump Rly A768 BU Pump Control Valve #1 (+)
326 PU Key Sw “C” Term A769 GY Pump Control Valve #2 (-)
329 YL Fuel Pump to Sw A770 PK Elec Pump Control Bypass Sw
365 YL Fuel Pump Rly to Switch A771 PU Float Sw
386 PK Air Shutoff Sol Enable F771 OR Backup Sw
Monitoring Circuits
F772 WH Backup Sw
403 GN Alternator (R) Term F773 OR Governor Accel
405 GY Opr Mon Oil Press F774 WH Governor Decel
412 BU Opr Mon Cool Flow 877 YL Glow Plug Magnetic Sw to Glow Plug
430 BU Opr Mon Air Filter 950 BR Hammer Sw C
487 OR Hyd Oil Flow Sw 951 PK Hammer Sol C
491 PK Hyd Oil Temp Sensor 954 GN Hammer Sw A
492 GY Coolant Temp Sensor K903 BR Dual HP Relay to Controller
495 GN Fuel Level K904 GN Pump Discharge - Signal
496 WH Opr Mon Panel Hyd Oil Level K905 BU Pump Discharge - (+) B
A495 GY Alternator (R) Terminal #2 K906 GN Swing Brake Sol - Signal
C468 BU Engine Oil Level K907 BU Swing Brake Sol - (+) B
Accessory Circuits
K909 BU Backup Sw - (+) B
501 GN Wiper - Front K911 PK E/P Controller - RS485 (+)
506 PU Washer - Front K912 GN E/P Controller - RS485 (-)
508 PU Radio Speaker - Left K915 GN Fine Swing Sw - E/P Controller
509 WH Radio Speaker - Left (Common) K997 BU (+) V Sensor
511 BR Radio Speaker - Right L908 OR Controller RS-232C TX
512 GN Radio Speaker - Right (Common) L909 BU Controller RS-232C RX
513 OR A/C Compressor/Refrigerant Press Sw L968 OR Elec Pump Control PS Valve (-)
519 PK Thermostat to Refrigerant Press Sw L969 WH Elec Pump Control PS Valve (+)
546 BU Aux Hyd - Rotate CW L970 GY Elec Pump Control to Switch Return
547 OR Aux Hyd - Rotate CCW L971 GN Elec Pump Control to Travel Pressure Sw
548 GY Aux Hyd - Open L972 BU Low Idle Sw
549 PK Aux Hyd - Close L973 GN Fine Swing Cont Relay to Sol Valve
575 YL Wiper - Aux L974 GN Elec Pump Cont Boom Raise Press Sw
576 PK Wiper - Aux L975 PK Start Aid Cont Lamp 1 Output
578 BU Washer - Aux L976 GN Excavator Fuel Pump Switch
586 BR Aux Hyd - Close L977 YL Trenching Sol
590 GY Wiper Sw to Intermittent Module L978 GY Level Finish Sol
592 BU DC/DC Converter Power Output
SENR8974
July 1996
330B L Excavator
Electrical System
6DR1-UP
©
1996 Caterpillar
All Rights Reserved
Printed in U.S.A.
¹
¹
147-PU-18
F774-WH-18
F773-OR-18
A761-PU-18
K904-GN-18
430-BU-18
K906-GN-18
A771-PU-18
763-BU-18
200-BK
112-PU-6
K909-BU-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
786-GN-18
149-PU
320-OR-18
A770-PK-18
200-BK
140-BU
149-PU
147-PU-18
105-RD
107-RD
103-RD-18
191-WH-14
115-PK-14
120-YL
118-GY
124-GN-14
200-BK-18
235-BK-14
200-BK-14
103-RD-18
506-PU-18
403-GN-18
A771-PU-18
788-YL-18
A762-PU-18
763-BU-18
412-BU-18
C468-BU-18
321-BR-18
405-GY-18
492-GY-18
491-PK-18
495-GN-18
430-BU-18
496-WH-18
K904-GN-18
A761-PU-18
487-OR-18
235-BK-14
200-BK-14
200-BK-18
786-GN-18
791-PK-18
308-YL-18
307-OR-18
578-BU-18
K906-GN-18
A768-BU-18
A769-GY-18
A770-PK-18
F774-WH-18
F773-OR-18
K909-BU-18
310-PU-18
A588-GN-18
A588-GN-18
107-RD
320-OR-18
151-GN-18
118-GY
512-GN-18
511-BR-18
509-WH-18
508-PU-18
103-RD-18
519-PK-18
113-OR-18
185-YL-18
105-RD
512-GN-18
511-BR-18
508-PU-18
509-WH-18
519-PK-18
124-GN-14
113-OR-18
185-YL-18
105-RD
118-GY
124-GN-14
200-BK-14
519-PK-18
103-RD-18
403-GN-18
403-GN-18
403-GN-18
403-GN-18
200-BK-18
200-BK-18
590-GY-18
501-GN-18
A586-OR-18
786-GN-18
791-PK-18
113-OR-18
308-YL-18
307-OR-18
105-RD
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
578-BU-18
K915-GN-18
310-PU-18
A769-GY-18
A768-BU-18
K906-GN-18
185-YL-18
K909-BU-18
K907-BU-18
A770-PK-18
F772-WH-18
F774-WH-18
F773-OR-18
F771-OR-18
200-BK-18
200-BK-18
615-YL-18
235-BK-14
615-YL
615-YL
235-BK-18
235-BK-18
308-YL-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
K912-GN-18
K911-PK-18
K915-GN-18
F771-OR-18
F772-WH-18
K907-BU-18
403-GN-18
487-OR-18
A761-PU-18
K904-GN-18
496-WH-18
430-BU-18
495-GN-18
491-PK-18
492-GY-18
405-GY-18
321-BR-18
C468-BU-18
412-BU-18
763-BU-18
A762-PU-18
788-YL-18
A771-PU-18
A586-OR-18
501-GN-18
590-GY-18
200-BK-18
200-BK-18
147-PU-18
140-BU
149-PU
151-GN-18
320-OR-18
107-RD
112-PU-6112-PU-14
112-PU-14
112-PU-14
124-GN-14
147-PU-18
200-BK-18
103-RD-18
140-BU
149-PU
151-GN-18
320-OR-18
107-RD
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
191-WH-14
185-YL18
200-BK-18
320-OR-18
151-GN-18
200-BK-18
320-OR-18
200-BK
K909-BU-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
RELAY PANEL
786-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
308-YL-18
616-BU
149-PU
786-GN-18
320-OR-18
A588-GN-18
151-GN-18
200-BK-18
200-BK-18
615-YL
791-PK-18
A770-PK-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
308-YL-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
308-YL-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
111-RD-14
189-RD-14
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
403-GN-18
112-PU-14
185-YL-18
112-PU-14
112-PU-14
112-PU-14
311-WH-18
310-PU-18
107-RD
103-RD-18
105-RD
149-PU
191-WH-14
118-GY
124-GN-14
120-YL
11
12
1
2
3
4
5
6
7
8
9
10
1
2
321-BR-18
A
3
7
9
1
11
5
2
1
4
3
5
6
A
J
200-BK-18
12
K904-GN-18
11
10
200-BK-18
200-BK-18
ATCH START
AID SOL
3E-6332
200-BK-18
200-BK-18
200-BK-18
A769-GY-18
A768-BU-18
763-BU-18
200-BK-18
200-BK-18
200-BK-18
6
1
3
5
1
AIR CLEANER SW
109-9330
A768-BU-18
2
7
A769-GY-18
8
9
4
J
A
A
A
TRAVEL ALARM
3E-7738
2
B
COOLANT
LEVEL SW
109-9436
1
2
MOTOR
UPPER WASHER
7T-8890
LOWER WASHER
7T-8890
BATTERY
3T-5760
NEG
POS
NEG
POS
ATCH
BATTERY
3T-5760
(NOTE C)
320-OR-18
L977-YL-18
L978-GY-18
L978-GY-18
763-BU-18
L977-YL-18
200-BK-18
200-BK-18
200-BK-18
200-BK
A770-PK-18
200-BK-18
200-BK-18
K909-BU-18
308-YL-18
200-BK-18
200-BK-18
200-BK-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
308-YL-18
786-GN-18
149-PU
320-OR-18
A770-PK-18
K909-BU-18
200-BK
POS
NEG NEG
POS
K997-BU-18
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUNDBK-18
BR-18
YL-18
B
C
B
A
M
M
N (NOTE D)
F
BBBB
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
1
2
200-BK-14
2
9 8 7 6 5 4 3 2
1
9 8 7 6 5 4 3 2
1
H
G
I
F
E
D
C
B
A
H
G
I
F
E
D
C
B
A
1
BK-00
386-PK-18
616-BU
DISCONNECT SW.
7N-0719
ALT BREAKER
9S-0174
YY
UU
VV
5
4
6
3
1
2
BACKUP
RESISTOR
102-8017
HYD LOCK SOL RELAY
111-4871
5
3
4
6
2
1
7
8
9
10
11
12
506-PU-18
CHASSIS
L42
L41
L29
L30
MAIN RELAY
3T-0376
CAB/CHASSIS LAMP RELAY
111-4871
578-BU-18
4
5
60A
200-BK-18
200-BK-18
MOTOR
A
6
3
12
2
1
7
11
8
9
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
10
A
B
CHASSIS
L30
L28
DIODE
121-1022
L28
L29
L30
L29
L41
L42
L42
L41
ZZ
200-BK-18
306-GN-18
177-RD-8
200-BK-18
386-PK-18
616-BU
306-GN-18
304-WH-8
L975-PK-18
L975-PK-18
L973-GN-18
L977-YL-18
L978-GY-18
L974-GN-18
L969-WH-18
L968-OR-18
L973-GN-18
L972-BU-18
L973-GN-18
487-OR-18
200-BK-18
L971-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
ENG/PUMP CONT
126-3022
L971-GN-18
L970-GY-18
L977-YL-18
L974-GN-18
L969-WH-18
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
403-GN-18
788-YL-18
A762-PU-18
C468-BU-18
405-GY-18
492-GY-18
L972-BU-18
L971-GN-18
L975-PK-18
L977-YL-18
L974-GN-18
L978-GY-18
L969-WH-18
L968-OR-18
L972-BU-18
519-PK-18
495-GN-18
321-BR-18
412-BU-18
306-GN-18
2
306-GN-18
306-GN-18
615-YL-18
3
AD 128-8936 I-8
4
1
NOTE E : REM'D WITH ATCH HEATER OPTION.
487-OR-18
310-PU-18
107-RD
103-RD-18
2
177-RD-14
177-RD-14
1
4
200-BK-18
177-RD-14
1
4
3
2
177-RD-14
177-RD-14
177-RD-14
5
177-RD-14
306-GN-18
177-RD-14
200-BK-18
308-YL-18
177-RD-6
K909-BU-18
307-OR-18
200-BK-18
177-RD-14
3
496-WH-18
200-BK-18
BK
YL
115-PK-14
RD-00
RD-00
5
177-RD-14
ATCH
SUCTION LINE
SHUTOFF LIMIT SW
3E-5181
B
HYD OIL
FILTER SW
133-6875
GROUND
SIGNAL
+B
C
B
A
177-RD-14
BB
B
177-RD-14
177-RD-14
177-RD-14
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
112-PU-6
HYD OIL
TEMP SENDER
4I-5394
FUEL LEVEL
SENSOR
105-9911
4
1 2
3
3
2
1
HYD OIL
LEVEL SW
111-4760
2
T~
1
B
200-BK-18
386-PK-18
386-PK-18
8
9
6
5
12
11
4
10
10
9
8
12
7
6
11
5
2
1
4
3
2
1
3
7
4
307-OR-18
VVAD
AD
177-RD-6
109-RD-6
101-RD-6
172-RD-18
111-RD-14
101-RD-6
147-PU-18
101-RD-6
MAIN BREAKER
9S-0174
118-GY
124-GN-14
12
4
10
2
6
112-PU-14
200-BK-14
200-BK-14
K912-GN-18
K911-PK-18
403-GN-18
185-YL-18
615-YL-18
K911-PK-18
K912-GN-18
149-PU
A586-OR-18
590-GY-18
501-GN-18
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
L972-BU-18
200-BK-14
103-RD-18
118-GY
615-YL-18
506-PU-18
403-GN-18
200-BK-14
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
615-YL
615-YL
506-PU-18
112-PU-14
112-PU-14
180-GN
189-RD-14
590-GY-18
501-GN-18
A586-OR-18
103-RD-18
8
103-RD-18
508-PU-18
509-WH-18
511-BR-18
512-GN-18
118-GY
103-RD-18
140-BU
105-RD
107-RD
103-RD-18
308-YL-18
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K915-GN-18
K907-BU-18
200-BK-18
308-YL-18
147-PU-18
200-BK-18
115-PK-14
C468-BU-18
112-PU-6
120-YL
191-WH-14
6
10A
10A
15A
10A
10A
10A
A A
ENG GOV
15A
7
8
1
6
5
4
3
2
PLATFORMCHASSIS
GROUND STRAP
7G-1060
K909-BU-18
CAB/CHASSIS LAMP
RADIO
LOWER WASHER/WIPER
WASHER/WIPER
H
H
CIGAR LIGHTER
A/C /HEATER
10A
HORN
FUSE
10A 9W-1442
15A 9W-1441
BACKUP
A
15A
DOME LAMP
KEY SW
BOOM LAMP
FINE SWING
10A
10A
10A
10A
10A
10A
10A
10A
10A
10A
BK
10A
10A
15A
BK
E/P CONT
HYD LOCK SOL
10A
304-WH-8
SHUTDOWN
AUX CKT
ATCH LUBRICATOR
6
8
1
7
4
5
3
2
HYD LOCK SW
JJJ
J
J
J
FUSE BASE
111-4812
506-PU-18
C
B
A
403-GN-18
152-BU
L52
118-GY
112-PU-6
152-BU
200-BK-18
200-BK-18200-BK-18
L52
200-BK-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
A755-PK-18
763-BU-18
A756-BU-18
200-BK-18 200-BK-18L52
A771-PU-18
A757-GY-18
177-RD-8
K997-BU-18
788-YL-18
A762-PU-18
412-BU-18
430-BU-18
321-BR-18
405-GY-18
492-GY-18
491-PK-18
495-GN-18
A758-BR-18
152-BU
496-WH-18
200-BK
WH-18
A762-PU-18
L53
308-YL-18
L975-PK-18
615-YL
200-BK-18
200-BK
200-BK-18
200-BK-18
200-BK-18
405-GY-18
492-GY-18
311-WH-18
519-PK-18
200-BK
200-BK
301-BU-10
301-BU-14
301-BU-10
200-BK-10
200-BK-18
NOTE C : USE WITH COLD WEATHER.
ZZ 111-4831 F-8
200-BK-18
172-RD-18
A761-PU-18
F773-OR-18
F774-WH-18
101-RD-6
513-OR-18
MOTOR
F774-WH-18
A/C CLUTCH
SOL
134-3998 (NOTE E)
ALT
R
B+
BU-18
A
B
C
304-WH-8
788-YL-18
519-PK-18
200-BK-18
F773-OR-18
311-WH-18
311-WH-18
A762-PU-18
200-BK-18
492-GY-18
492-GY-18
ENG SPEED
SENSOR
6V-2455
RD-18
BK-18
CHASSIS
ENG OIL
PRESS SW
3E-6455
1
2
A761-PU-18
200-BK-18
788-YL-18
200-BK-18
405-GY-18
172-RD-18
326-RD
C468-BU-18
403-GN-18
109-RD-6
200-BK-18
ATCH
START AID
COOLANT TEMP SW
3E-6449
B-
STARTER
MOTOR
6V-5227
6V-0512 (NOTE C)
304-WH-8
B
G S
MTR BAT
ENG
SHUTDOWN SOL
3E-7985
101-RD-6
RD-00
RD-00
C
200-BK-10
B
B
K997-BU-18
1
200-BK-6
2
2
1
BK-00
ENG OIL
LEVEL SW
111-4759
405-GY-18
ALTERNATOR
100-5047
200-BK-18
C
KEY
B
C
B
B
B
HH
ENG GOV
ACTUATOR
106-0126
C
6
DECEL
200-BK-18
L10
191-WH-14
191-WH-14
J704-WH-18
308-YL-18
113-OR-18
123-WH-14
123-WH-14
113-OR-18
308-YL-18
J704-WH-18
615-YL
308-YL-18
576-PK
200-BK-18
200-BK
200-BK-18
114-RD
114-RD
114-RD
235-BK-18
K997-BU-18
A
546-BU-18
1
8
6
10
12
7
9
11
2
J704-WH-18
547-OR-18
191-WH-14
5
K997-BU-18
4
200-BK-14
L970-GY-18
152-BU
235-BK-18
J704-WH-18
961-GN-18
C468-BU-18
K907-BU-18
F772-WH-18
F771-OR-18
K915-GN-18
K911-PK-18
K912-GN-18
152-BU
60A
3
549-PK-18
548-GY-18
L909-BU-18
L908-OR-18
487-OR-18
K904-GN-18
K905-RD-18
152-BU
235-BK-18
200-BK-18
J704-WH-18
546-BU-18
547-OR-18
A
512-GN-18
511-BR-18
509-WH-18
508-PU-18
CONNECTOR
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
GOV ACTR (A)
EPR VALVE (+)
GOV ACTR (B)
GOV ACTR FDBK
COOLANT LEVEL SW
TRAVEL SPEED SOL
ENG SPEED SENSOR (-)
ENG SPEED SENSOR (+)
TRENCHING SOL
IMPLEMENT PRESS SW
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
FRONT PUMP PRESS SENSOR
HYD OIL LEVEL SW
AIR CLEANER SENSOR
HYD OIL TEMP SENSOR
RS485 - (VALVE CONT)
RS485 + (VALVE CONT)
RS232C (GND)
RS232C (RX)
COOLANT SENSOR
9
20
10
28
31
26
13
30
29
35
40
2
6
39
6
24
25
22
15
ALTERNATOR (R TERM)
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS SW
36
SWING BRAKE SOL
23
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK)
7
CAB
8 RS485 - (LH JOYSTICK)
RS485 + (PEDAL) 9
10
RS485 + (SEMI AUTO)
RS485 - (PEDAL)
RS485 + (RADIO CONT)17
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18 TRAVEL PRESS SW
HYD OIL FILTER INDICATOR
18
RS485 - (RADIO CONT)
RS485 + (ELEC GOV)
19
+B
+B
AIH INDICATOR
FINE SWING SW
BOOM RAISE PRESS SW
LEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS SW
32
33
25
KEY SW ON
RS485 - (ELEC GOV)
26
12
40
2
4
28
27
LOW IDLE SW
21
20
1
11
22
34
3
24
23
14
13
16
15
5
36
35
29
31
30
39
38
37
GND
GND
HAMMER PRESS. SW
RS232C (TX)
KEY SW START
A
DOME LAMP
6C-9121
2
3
4
5
6
1
8
7
37
4
3
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
J704-WH-18
32
33
DEGITAL OUT (-)
DEGITAL OUT (-)
14
11
34
SPEAKER (L)
6T-7695
SPEAKER (R)
6T-7695
2
1
8
3
5
4
7
6
129-BU
120-YL
A
1
113-OR-18
6
4
3
2
4
3
1
2
123-WH-14
F
F
F
F
E E
A
A A
A/C
UNIT
126-3376
177-RD-8
L7
PLATFORM
A
JOY STICK +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
L15
L971-GN-18
L15
BB
115-PK-14
189-RD
154-RD-18
111-RD-14
150-RD-18
K997-BU-18
189-RD
154-RD-18
111-RD-14
150-RD-18
BB
C538-OR-18
B
C537-GN-18
A
A
L45
L15
L50
L45
RELAY PANEL
115-PK-14
114-RD-18
114-RD-18
L15
D
D
DA
A
A
L48
L47
200-BK-18
150-RD-18
189-RD
154-RD-18
111-RD-14
150-RD-18
115-PK-14
115-PK-14
1
2
BK-18
150-RD-18
114-RD
154-RD-18
189-RD
111-RD-14
B
K909-BU-18
ACCEL
+B
F/B
GND
AA
EE(NOTE C)
150-RD-18
K909-BU-18
786-GN-18
177-RD-14
L10
320-OR-18
A513-RD-18
592-BU-18
L10
C538-OR-18
C537-GN-18
549-PK-18
548-GY-18
308-YL-18
576-PK
200-BK
5
A
A
3
1
4
2
576-PK
K906-GN-18
200-BK-6
B
T~
386-PK-18
200-BK-18
326-RD
129-BU
403-GN-18
615-YL-18
103-RD-18
C538-OR-18
K997-BU-18
A768-BU-18
172-RD-18
12
WW
306-GN-18
200-BK-18
200-BK-18
177-RD-14
200-BK-18
321-BR-18
200-BK-18
ENG COOLANT
TEMP SENDER
128-8945
430-BU-18
412-BU-18
C
2
310-PU-18
311-WH-18
1
T~
109-RD-6
403-GN-18
430-BU-18
200-BK-18
200-BK-18
412-BU-18
B
111-RD-14
189-RD
154-RD-18
154-RD-18
189-RD
177-RD-14
111-RD-14
B
B
RELAY PANEL
200-BK-18
11
10
9
K912-GN-18
K911-PK-18
501-GN-18
L974-GN-18
C537-GN-18
K906-GN-18
506-PU-18
590-GY-18
L54
200-BK-18
200-BK-18
200-BK-18
200-BK-18
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
200-BK-18
HH 7Y-8132 A-8
GG 116-0242 H-8
FF 116-0080 H-8
EE 116-0162 A-8
DD 111-4881 I-8
CC 125-4727 I-8
BB 116-0080 I-8
AA 116-0161 A-8
CABLE AS.
VV 128-8937 F-8
WIRE AS.
L974-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-14
A586-OR-18
A579-OR
1
3
200-BK-14
K 116-0146 B-2
J 132-1979 H-3
H 133-6079 D-3
F 128-7337 G-1
E 128-7336 E-1
D 135-6090 F-8
C 135-6088 A-9
B 135-6087 A-3
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
IDENT PART NO. LOC
200-BK-18
HARNESS AS.
592-BU-18
310-PU-18
509-WH-18
508-PU-18
512-GN-18
511-BR-18
A513-RD-18
592-BU-18
200-BK-18
A513-RD-18
615-YL
CONVERTER
112-3543 (2.5A)
615-YL
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
495-GN-18
6
1
2
3
4
5
616-BU
496-WH-18
487-OR-18
491-PK-18
GND
306-GN-18
386-PK-18
L977-YL-18
763-BU-18
OUT
L978-GY-18
IN
MEM
A768-BU-18
A769-GY-18
K904-GN-18
K997-BU-18
IGN
MOTOR
F
UPPER WIPER
MOTOR
134-5551
105-RD
4
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
2
6
A761-PU-18
F773-OR-18
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
F774-WH-18
L52
326-RD
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
200-BK-18
A762-PU-18
C468-BU-18
200-BK-18
200-BK-18
304-WH-8
607-PK
200-BK-18
322-GY
K909-BU-18
L54
L54
492-GY-18
L54
K909-BU-18
607-PK
311-WH-18
B
ANTENNA
8E-1118
495-GN-18
616-BU
L18
495-GN-18
200-BK-18
616-BU
311-WH-18
A
J
321-BR-18
412-BU-18
430-BU-18
310-PU-18
8
7
5
4
3
2
12
1
10
8
11
12
9
10
11
4
3
2
1
9
8
2
7
6
5
4
3
2
1
4
5
6
1
7
3
3
H
H
AA
H
2
A
H
4
A
200-BK-18
200-BK-18
L969-WH-18
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
L8
L52
L970-GY-18
12 VDC RADIO
3E-7140
(NOTE F)
NOTE F : HORIZONTAL MTG LOCATION FOR CASSETTE.
L8
L8
L8
L20
306-GN-18
L20
200-BK-18
200-BK-18
L8
200-BK-18
L8
616-BU
547-OR-18
304-WH-8
L53
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
L38
L37
L17
615-YL-18
615-YL-18
200-BK-18
L8
115-PK-14
K905-RD-14
150-RD-18
108-BU
154-RD-18
L970-GY-18
172-RD-18
L973-GN-18
ANTENNA
CABLE
8R-6111
L40
L39
L39
L8
L38
L37
YY 111-4830 F-8
147-PU-18
615-YL-18
615-YL-18
L37
L38
578-BU-18
177-RD-14
L973-GN-18
322-GY
L39
200-BK-18
115-PK-14
200-BK-18
172-RD-18
189-RD
154-RD-18
150-RD-18
607-PK
K907-BU-18
111-RD-14
K905-RD-14
L22
2
1
OUT 1
+B
IN 2
IN 1
L21
GND
OUT 2
L20
UU
L19
ZZ
YY
XX
WW
12
1
8
2
K905-RD-14
10
11
3
4
180-GN
168-RD
J
1
2
9
TIMER RELAY
111-4870
7
6
XX
GND
180-GN
CONV (OUT)
K905-RD-14
5
615-YL-18
NEUTRAL
START RELAY
111-4871
START RELAY
125-1302
10A
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
L21
XX 111-4829 F-8
L19
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L3
L18
L22
L21
L18
L34
L34
L8
L19
L3
L34
L4
L25
L19
L3
L25
L4
L33
L21
168-RD
L31
L9
114-RD
L12
L13
AUX CKT
L13
L12
L11
200-BK-18
L9
592-BU-18
L31
HH
L33
L33
L33
L33
K915-GN-18
326-RD
308-YL-18
L19
L3
L25
L4
L4
L25
L3
L19
L20
A513-RD-18
511-BR-18
L31
L4
L25
L3
L19
L20
512-GN-18
L20
L25
L3
L4
L4
L3
L19
L20
L25
508-PU-18
L2
K997-BU-18
K997-BU-18
J704-WH-18
615-YL-18
509-WH-18
WIRES K911-PK & K912-GN TO BE TWISTED AROUND
EACH OTHER AT LEAST 1 TURN PER 25 mm.
615-YL-18
L27
L26
113-OR-18
615-YL
L27
L26
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
615-YL-18
A769-GY-18
J704-WH-18
113-OR-18
152-BU-18
615-YL-18
A768-BU-18
592-BU-18
K906-GN-18
108-BU
615-YL-18
185-YL-18
L29
L28
129-BU
109-RD-6
129-BU
SWITCH PANEL
113-OR-18
AB
607-PK
WW 128-8938 F-8
310-PU-18
615-YL-18
615-YL-18
200-BK-18
308-YL-18
H
ATCH START
AID SW
111-4784
546-BU-18
114-RD
113-OR-18
101-RD-6
185-YL-18
112-PU-14
L5
151-GN-18
L20
L20
LOWER
WIPER SW
111-4785
LOWER
WASHER SW
111-4786
H
L11
FINE
SWING CONT SW
111-4788
115-PK-14
308-YL-18
HH
BACKUP
EPR VALVE SW
114-0421
H H
BACKUP
GOV SW
110-7884
H
200-BK-14
200-BK-18
200-BK-18
1
3
2
4
200-BK
615-YL
200-BK
200-BK
200-BK-14
200-BK
CC
308-YL-18
B
BA
A
2
1
B
403-GN-18
109-RD-6
519-PK-18
FINE SWING
SOL
116-3526
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
1
109-RD-6
2
J704-WH-18
J704-WH-18
RH SPKR (-)
RH SPKR (+)
LH SPKR (-)
A 130-8444 C-2
LH SPKR (+)
6
5
3
4
2
1
8
547-OR-18
7
L8
152-BU
1
B
2
1
B
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
TRAVEL
PRESS SW
106-0179
L48
L47
L47
L50
L48
A
B
B
B
DB
172-RD-18
322-GY
L51
607-PK
L49
L51
L49
L50
L51
113-OR-18
L45
L44
L42
L41
L29
L30
L44
L42
L41
L29
L30
L30
L29
L41
GG
L6
A588-GN-18
961-GN-18
F
108-BU
120-YL
-
+
-
+
512-GN-18
511-BR-18
509-WH-18
508-PU-18
OR
4
616-BU
200-BK
3
2
103-RD-18
118-GY
A579-OR
F
615-YL
615-YL
200-BK-14
L42
386-PK-18
306-GN-18
491-PK-18
1
487-OR-18
180-GN
496-WH-18
200-BK-18
386-PK-18
WH-18
WH-18
WH-18
WH-18
306-GN-18
B
491-PK-18
200-BK-18
200-BK-18
L44
A571-PU
3
616-BU
H
4
A572-PK
A572-PK
A571-PU
180-GN
615-YL
607-PK
322-GY
200-BK
200-BK
1
2
WIPER
W INT
W LOW
PUMP
+B
WASH
GND
GND
H
M 130-2211 G-1
A572-PK
A571-PU
H
326-RD
180-GN
961-GN-18
961-GN-18
549-PK-18
200-BK-14
AE
4
200-BK
H
H
J704-WH-18
548-GY-18
J704-WH-18
101-RD-6
326-RD
308-Yl-18
200-BK-18
200-BK-18
J
J
615-YL
101-RD-6
LAMP
126-7487
L970-GY-18
A579-OR
118-GY
1
3
2
A758-BR-18
118-GY
115-PK-14
111-RD-14
2
1
8
7
5
6
4
3
508-PU-18
322-GY
509-WH-18
511-BR-18
J
512-GN-18
F
307-OR-18
A757-GY-18
615-YL-18
A756-BU-18
+B
200-BK-18
J
576-PK
615-YL
120-YL
118-GY
A513-RD-18
A755-PK-18
L45
C538-OR-18
200-BK-18
129-BU
C537-GN-18
C538-OR-18
BLOCK
121-1023
607-PK
L971-GN-18
A771-PU-18
L971-GN-18
A771-PU-18
L45
152-BU
506-PU-18
L49
L44
ATCH HYD CTL
J
A
N 129-8144 G-1
200-BK
105-RD
A586-OR-18
549-PK-18
549-PK-18
C537-GN-18
HYD OIL FILTER SW
113-OR-18
5
L7
A513-RD-18
548-GY-18
ANTENNA CABLE
134-4430
501-GN-18
592-BU-18
200-BK-18
L24
12 VDC RADIO
103-8525
REMOVAL TOOL
7Y-5493
172-RD-18
322-GY
168-RD
150-RD-18
K912-GN-18
616-BU
A
C538-OR-18
201-BK-18
200-BK-18
C
B
A
103-RD-18
RH SPKR (-)
C537-GN-18
5
4
3
2
1
118-GY
108-BU
129-BU
A579-OR
A513-RD-18
615-YL
120-YL
592-BU-18
A579-OR
F
A
113-OR-18
140-BU
123-WH-14
J704-WH-18
615-YL
114-RD
123-WH-14
J704-WH-18
J704-WH-18
A513-RD-18
592-BU-18
177-RD-14
+B
COMP
GND
SUN+
SUN-
320-OR-18
154-RD-18
189-RD
172-RD-18
L22
RH SPKR (+)
LH SPKR (-)
L17
L15
K905-RD-14
LH SPKR (+)
L22
111-RD-14
150-RD-18
200-BK
616-BU
322-GY
151-GN-18
308-YL-18
ATCH
HEATER UNIT
128-9726
152-BU
519-PK-18
L24
615-YL
114-RD
200-BK-18
J704-WH-18
548-GY-18
200-BK-18
L970-GY-18
L970-GY-18
LAMP
126-7487
200-BK
615-YL
CONV (MEM)
308-YL-18
326-RD
200-BK-14
200-BK-18
200-BK
200-BK-18
129-BU
OPERATOR STATION
123-WH-14
108-BU
1
114-RD
140-BU
322-GY
6
113-OR-18
113-OR-18
129-BU
607-PK
200-BK-18
103-RD-18
118-GY
A579-OR
A579-OR
108-BU
123-WH-14
200-BK
123-WH-14
607-PK
150-RD-18
607-PK
154-RD-18
200-BK
A588-GN-18
L7
A
A
152-BU
C
ATCH FAN
AE
L8
B
200-BK-14
108-BU
K911-PK-18
590-GY-18
L6
308-YL-18
403-GN-18
A579-OR
C538-OR-18
C537-GN-18
200-BK-14
201-BK-18
200-BK-18
3
1
4
607-PK
322-GY
322-GY
2
B
200-BK-14
J704-WH-18
322-GY
615-YL
L972-BU-18
200-BK-18
308-YL-18
200-BK-18
113-OR-18
791-PK-18
786-GN-18
306-GN-18
A586-OR-18
501-GN-18
590-GY-18
L20
547-OR-18
J704-WH-18
546-BU-18
J
103-RD-18
120-YL
GND
114-RD
J704-WH-18
607-PK
615-YL
322-GY
607-PK
615-YL
115-PK-14
546-BU-18
6
A
154-RD-18
CONV (OUT)
200-BK
K
576-PK
CONV (MEM)
B
J704-WH-18
2
AC
4
1
114-RD
200-BK-18
592-BU-18
A513-RD-18
512-GN-18
511-BR-18
509-WH-18
2
1
J704-WH-18
200-BK-18
961-GN-18
615-YL
189-RD
172-RD-18
L21
3
508-PU-18
L20
L5
L11
L12
H
L6
E
CAB
ATCH
HYD CONT SW
111-4787
J
PLATFORM
120-YL
E
E
+
7
H
ONE TOUCH
LOW IDLE SW
128-2134
L19
114-RD
114-RD
607-PK
J
200-BK-18
HYD
LOCK SOL
121-1491
L15
L17
L15
8
L14
+B
L. CHASSIS
L. BOOM
ATCH LAMPS
306-GN-18
WASH
W. LOW
W. INT
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
N
N
200-BK
200-BK
200-BK-18
615-YL
1
2
6
5
4
NEUTRAL START
LIMIT SW
111-4799
HORN SW
128-2134
129-BU
L15
L975-PK-18
AC
K997-BU-18
326-RD
L21
L19
L3
200-BK
L21
L19
L3
L18
L3
L18
AC
200-BK
L13
L13
L12
L11
L13
L12
L11
L9
E
K997-BU-18
L7
K905-RD-18
K905-RD-18
L14
L1
A
A
E
L7
L6
L7
L1
AC 135-6089 A-2
AE 132-1973 A-3
NOTE D : USE WITH FALLING OBJECT GUARD.
B
L1
SW INPUT
K905-RD-18
F
AC
ATCH
BOOM LAMP
5I-8250
L20
322-GY
CHASSIS
OPERATOR STATION
S4
S3
S2
S1
COM
306-GN-18
AB 121-1044 A-6
108-BU
3
B
322-GY
607-PK
HORN
7T-0970
M
N (NOTE D)
M
200-BK
K
607-PK
K
200-BK
200-BK-18
616-BU-18
200-BK-18
616-BU-18
H
200-BK
MONITOR
106-0172
200-BK
SWITCH PANEL
111-4800
KEY SW
9G-7641
H
607-PK
113-OR-18
322-GY
607-PK
L2
SUN LOAD
SENSOR
128-2162
L3
2
1
LOWER
WIPER MOTOR
131-0398
+
-
L2
UU 111-4826 F-8
+1
-
MOTOR
SERVICE
METER
6T-7337
CHASSIS
LAMP
5I-8251
THROTTLE
POS SW
106-0107
ATCH
BOOM LAMP
5I-8250
322-GY
L6
EE
R
C
S
B
WIPER/WASHER
CONTROLLER
127-9838
615-YL
OFF
615-YL
ON
ST
NOTE A : NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
L7
LIGHTER
9W-0335
607-PK
607-PK
2
1
AUX HYD
PRESS SW
106-0181
200-BK
L7
HORN
7T-0969
L6
THIS SCHEMATIC IS FOR THE 330B-HYD EXCAVATOR.
(116-0145 CHANGE 00)
TO MACHINE STRUCTURE
SERVICE
K905-RD-14
D65233
CONN 1
CONN 2
CONN 3
CONN 5
CONN 4
CONN 6
CONN 7
CONN 8
CONN 9
CONN 10
CONN 11
CONN 12
CONN 13
CONN 32
CONN 31
CONN 33
CONN 34
CONN 30
CONN 14
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 209
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.
ENGINE SHUTDOWN CONTROL CIRCUIT.
START AID CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.