345B ELECTRICAL SYSTEM SCHEMATIC USED IN SERVICE MANUAL SENR1925 AURORA

Component Identifiers (CID) for
Engine Control (MID 36)
[As displayed on Service Tool]
CID No. Component
001 Cylinder 1
002 Cylinder 2
003 Cylinder 3
004 Cylinder 4
005 Cylinder 5
006 Cylinder 6
100 Oil Pressure Signal
110 Coolant Temperature Signal
168 Electrical System Voltage
172 Inlet Air Temperature Signal
174 Fuel Temperature Signal
190 Engine RPM Signal
253 Personality Module
261 Timing Calibration
262 Analog Sensor Supply
268 Programmable Parameters
273 Boost Pressure Signal
274 Atmospheric Pressure Signal
286 Oil Lamp
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Travel
G-9 1
Sensor - Fuel Temperature
A-8 17
Alternator
D-8 2
Sensor - Intake Manifold Air Temperature
B-8 13
Assembly - Terminal Block
F-8 D
Sensor - Oil Pressure
B-8 14
Batteries - 12VDC
H-8,l-8 3
Sensor - Pump Discharge Press
B-7 15
Breaker - Alternator
I-8 D
Sensor - Speed/Timing
B-8 14
Breaker - Main
I-8 D
Sensor - Sun Load
F-1 E
Control - Engine
C-9 4
Solenoid - A/C Clutch
D-9 18
Control - Engine/Pump
F-2 C
Solenoid - CTWT Removal Cont
C-7 19
Controller - Wiper/Washer
E-1 E
Solenoid - Eng/Pump Control
A-6 20
Converter - Voltage
C-5 A
Solenoid - Fine Swing
E-7 21
Diode - Main Relay
H-7 D
Solenoid - Hydraulic Lock
I-1 F
Fuses
I-4,5,6 B
Solenoid - Level Finish
A-7 20
Ground - Cab
B-5 5
Solenoid - Start Aid
I-9 22
Ground - Cab
E-1 E
Solenoid - Swing Brake
E-7 21
Ground - Chassis
B-3 6
Solenoid - Travel Speed
A-7 20
Ground - Chassis
C-8 7
Solenoid - Trenching
A-6 20
Ground - Chassis
I-8 D
Solenoids - Injector
A-8 23
Ground - Engine Control
B-9 4
Switch - Air Cleaner Flow
H-9 24
Ground - Platform
G-2 F
Switch - Aux Hydraulic Pressure
H-3 B
Ground - Platform
H-1 F
Switch - Backup EPR Valve
E-5 C
Ground - Relay Panel
H-8 D
Switch - Backup Governor
D-5 C
Ground Strap - Chassis to Platform
I-6 8
Switch - Boom Raise Pressure
E-8 C
Horn
B-2 7
Switch - Coolant Level
I-9 22
Lighter
E-1 E
Switch - CTWT Removal
C-7 19
Meter - Service
F-1 E
Switch - Disconnect
I-8 D
Monitor
F-1 E
Switch - Engine Oil Level
D-8 25
Motor - Lower Washer
I-9 D
Switch - Fine Swing Control
D-4 C
Motor - Lower Wiper
H-1 9
Switch - Horn
I-1 B
Motor - Starter
D-8 6
Switch - Hydraulic Control
D-4 C
Motor - Upper Washer
I-9 D
Switch - Hydraulic Oil Filter
A-5 11
Motor - Upper Wiper
C-5 10
Switch - Hydraulic Oil Level
A-5 11
Radio - 12VDC
C-6,J-3 A
Switch - Hydraulic Tank Pressure
A-5 26
Relay - Boom Lamp
I-7 D
Switch - Implement Pressure
E-8 21
Relay - Cab/Chassis Lamp
I-7 D
Switch - Key
F-2 C
Relay - Horn
I-7 D
Switch - Lower Washer
D-3 C
Relay - Hydraulic Lock Solenoid
I-7 D
Switch - Lower Wiper
D-3 C
Relay - Main
G-7 D
Switch - Neutral Start Limit
I-1 B
Relay - Neutral Start
F-7 D
Switch - One Touch Low Idle
F-2 C
Relay - Start
F-B D
Switch - Refrigerant Low Pressure
D-9 22
Relay - Timer
F-7 D
Switch - Start Aid
D-5 C
Resistor - Backup
I-8 D
Switch - Start Aid Coolant Temp
D-9 14
Sender - Hydraulic Oil Temp
A-5 11
Switch - Suction Line Shutoff Limit
A-6 11
Sensor - Atmospheric Pressure
B-B 12
Switch - Throttle Position
E-3 C
Sensor - Boost Pressure
B-8 13
Switch - Travel Pressure
E-8 21
Sensor - Coolant Temperature
B-8 14
Switch Panel
F-2 C
Sensor - Engine Speed Pickup
C-8 15
Unit - A/C, Heater
H-5 28
Sensor - Fuel Level
A-5 16
Machine locations are repeated for components located close together.
A = Located in operator’s compartment. D = Located in relay panel area.
B = Located in operator’s left console area. E = Located in dash area.
C = Located in operator’s right console area. F = Located under cab floor plate.
Connector Location
1
Connector Number
Schematic
Location
Machine
Location
CONN 3 B-8 25
CONN 4 A-9 12
CONN 5 C-8 25
CONN 6 C-8 25
CONN 7 C-8 25
CONN 8 C-8 25
CONN 9 F-9 D
CONN 10 F-9 D
CONN 11 F-9 D
CONN 12 G-9 D
CONN 13 G-9 D
CONN 14 G-9 D
CONN 15 G-8 D
CONN 16 G-8 D
CONN 17 F-8 D
CONN 18 F-8 D
CONN 19 D-7 19
CONN 24 C-6 5
CONN 25 C-5 5
CONN 28 C-5 F
CONN 29 C-4 F
CONN 30 F-5 C
CONN 31 F-5 C
CONN 32 F-5 C
CONN 33 F-5 C
CONN 34 F-4 C
CONN 35 F-4 C
CONN 36 F-4 C
CONN 37 F-4 C
CONN 38 H-5 B
CONN 39 H-5 B
CONN 40 H-5 B
CONN 41 H-5 B
CONN 42 H-4 B
CONN 44 H-4 B
CONN 45 H-4 B
CONN 46 H-3 B
CONN 47 H-3 B
CONN 48 Factory Adjustment D-2 F
CONN 49 C-3 F
CONN 50 B-3 27
CONN 51 B-3 29
CONN 52 A-3 29
CONN 60 Service H-8 D
1
The connectors shown in this chart are for harness to harness connectors.
Connectors that join a harness to a component are generally located at or near the
component. See the Component Location Chart.
Engine Control Real Time Error Codes
[As displayed on the Engine/Pump Control]
Code Discription Of Problems
B101 Cylinder 1 open circuit.
B1 02 Cylinder 1 short.
B103 Cylinder 2 open circuit.
B104 Cylinder 2 short.
B105 Cylinder 3 open circuit.
B106 Cylinder 3 short.
B107 Cylinder 4 open circuit.
B108 Cylinder 4 short.
B109 Cylinder 5 open circuit.
B10A Cylinder 5 short.
B10b Cylinder 6 open circuit.
B10C Cylinder 6 short.
B10d Throttle switch inputs are incorrect.
B10E Oil press open/short to +battery.
B10F Oil press short to ground.
B110 Oil press calibration required.
B111 Coolant temp open/short to +battery.
B112 Coolant temp short to ground.
B113 Battery voltage above normal.
B114 Battery voltage below normal.
B115 Loss of engine rpm signal.
B116 Analog sensor supply short to +batt.
B117 Analog sensor supply short to ground.
B118 Digital sensor supply short to +batt.
B119 Digital sensor supply short to ground.
B11A Shutdown inputs are incorrect.
B11b Turbo out press open/short to +batt.
B11C Turbo out press short to ground.
B11d Turbo out press calibration required.
B11E Atmospheric press open/short to +batt.
B11F Atmospheric press short to ground.
B120 Atmospheric press calibration req.
B121 Check programmable parameters.
B122 Timing calibration required.
B123 Hyd oil temp open/short to +battery.
B124 Hyd oil temp signal short to ground.
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.
2302 Fuel gauge indicator is not normal.
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 (swing priority solenoid).
4106 Over-current in digital output (fine control solenoid).
4107 Over-current in digital output (travel speed change solenoid).
4108 Over-current in digital output (travel alarm).
410A Over-current in digital output (swing break solenoid).
4201 Engine speed is not normal.
4203 Hydraulic oil temperature sensor is shorted to body ground.
4204 PWM sensor of pump delivery pressure is shorted to body ground.
4207 PWM sensor of pump delivery pressure is open in circuit.
420A Fuel sensor is shorted to body ground.
420B Fuel sensor is open or shorted to battery voltage.
420C Electric power supply is too low (below 23 volts).
420D Electric power supply is too high (above 32 volts).
420E Blank code of engine speed dial.
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.
Engine/Pump Controller Real Time Error Codes
Failure Mode Identifiers (FMI) List
FMI No.
Failure Description
0 Data valid but above normal operational range.
1 Data valid but below normal operational range.
2 Data erratic, intermittent, or incorrect.
3 Voltage above normal or shorted high.
4 Voltage below normal or shorted low.
5 Current below normal or open circuit.
6 Current above normal or grounded circuit.
7 Mechanical system not responding properly.
8 Abnormal frequency, pulse width, or period.
9 Abnormal update.
10 Abnormal rate of change.
11 Failure mode not identifiable.
12 Bad device or component.
13 Out of calibration.
Related Electrical Service Manuals
Form Number
Alternator: (100-5047)
SENR2082
Engine Control
RENR1235
Engine/Pump Control
SENR1935
Starting And Charging
SENR1936
Starting Motor: (106-8553)
SENR3581
Title
Part No. Component Description Resistance (Ohms)¹
3E-6332
Solenoid - Start Aid
6.0
4I-5394
Sender - Hydraulic Oil Temp
6130 to 7500
102-8017
Resistor - Backup
52.0 ± 2.6
111-9916
Solenoid - Engine/Pump Control
11.7 ± 1.2
121 -1490
Solenoid - Level Finish
Trenching
32.0 ± 3.2
121 -1491
Solenoid - Hydraulic Lock
Swing Brake
Travel Speed
32.0 ± 3.2
134-3998
Solenoid - A/C Clutch
17.6 ± 0.6
¹ At room temperature unless otherwise noted.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6449 Start Aid Coolant Temperature
38.0 ± 3.0°C
(100.4 ± 5.4°F)
27 °C MIN
(80.6 °F MIN)
Normally Closed
106-0179
Implement Pressure
Travel Pressure
1225.00 ± 98.00kPa
(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
107-0615 Hydraulic Tank Pressure
48 ± 14 kPa
(7.0 ± 2.0 psi)
24 kPa MIN
(3.5 psi MIN)
Normally Closed
114-5333 Refrigerant Pressure (AC)
275 to 1750 kPa ¹
(40 to 255 psi)
-
-
Normally Open ²
² Contact position at the contacts of the harness connector.
¹ A hysteresis band exists: with increasing pressure tne closed condition can be maintained up to 2800 kPa (405 psi), with decreasing pressure the closed
condition can be maintained down to 170 kPa (25 psi).
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Accessory Circuits (Continued)
101 RD
Bat (+)
A513 PK
DC/DC Converter Memory Output
103 YL
Aux Ckt
A571 PU
Aux Ckt 1
105 BR
KeySw
A572 PK
Aux Ckt 2
108 BU
AuxCkt
A579 OR
Wiper Motor +
109 OR
Alt Output (+) Term.
A586 OR
Wiper SW To Wiper Cont
111 YL
AuxCkt
A558 GN
Safety Sol Relay To Sol
112 PU
Main Power RIy Output
C537 GN
A/C Photo Sensor (+) Sig
113 OR
Opr Mon Panel (+) B Switched
C538 OR
A/C Photo Sensor (-) Sig
114 GN
Warning Horn (Forward)
Lighting Circuits
115 PK
AuxCkt
607 PK
Flood Lamp - Front
118 GY
AuxCkt
615 YL
Cab Flood Lamp/Rops
120 YL
AuxCkt
616 BU
Bucket Flood Lamp/Boom Flood Lamp
123 WH
Aux Ckt
Control Circuits
124 GN
A/C
763 BU
Torque Converter SW
129 BU
AuxCkt
786 GN
Eng Speed Cont - Hi Press SW
133 OR
Aux Ckt
788 YL
Eng Speed (+)
140 BU
AuxCkt
791 PK
Eng Speed Cont - Lo Sol
147 PU
Aux Ckt
A701 GY
Injector #1
149 PU
AuxCkt
A702 PU
Injector #2
150 OR
Bat(+)
A703 BR
Injector #3
151 GN
Aux Ckt
A704 GN
Injector #4
152 BU
AuxCkt
A705 BU
Injector #5
154 WH
Aux Ckt
A706 GY
Injector #6
168 GN
AuxCkt
A746 PK
Turbo Outlet Pressure
176 OR
Aux Ckt
A747 GY
Atmospheric Pressure
177 OR
Main Brkr
A751 YL
After Cooler Temp
179 BU
AuxCkt
A755 PK
Throttle SW #1
180 GN
AuxCkt
A756 BU
Throttle SW #2
185 YL
Aux Ckt
A757 GY
Throttle SW #3
189 WH
Aux Ckt
A758 BR
Throttle SW #4
191 WH
Aux Ckt
A762 PU
Electronic Pump Cont Eng Speed Ground
Ground Circuits
A768 BU
Pump Control Valve #1 (+)
200 BK
Main Chassis
A769 GY
Pump Control Valve #2 (-)
201 BK
Operator Monitor Return
A770 PK
Electronic Pump Control Bypass SW To Resistor
235 BK
Electronic Pump Ctrl Gnd
A771 PU
Float SW
Basic Machine Circuits
D789 WH
Injector Common 1 & 2
304 WH
Starter Relay No. 1 Output
D790 OR
Injector Common 3 & 4
306 GN
Starter Relay Coil To Neut Start SW Or Key SW
D791 YL
Injector Common 5 & 6
307 OR
Key SW To Neut Start SW
E793 BU
ATA Data Link (-)
308 YL
Main Power Relay Coil
E794 YL
ATA Data Link (+)
310 PU
Start Aid SW To Start Aid Sol
F400 GY
Low Oil Pressure
311 WH
Start Aid Sol To Temp SW
F717 YL
SW4
320 OR
Horn Relay Coil To SW
F718 BU
SW5
321 BR
Travel Alarm
J704 WH
Hyd Lock Sol Relay
322 GY
Warning Horn (Forward)
892 BR
CAT Data Link (-)
326 PU
Key SW C Term.
893 GN
CAT Data Link (+)
386 PK
Air Shutoff Solenoid Enable
961 BR
Selector SW
Monitoring Circuits
993 BR
Analog Sensor Common
403 GN
Alternator (R) Term.
994 GY
Oil Pressure (Filtered)
412 BU
Opr Mon Cool Flow
995 BU
Coolant Temperature
430 BU
Opr Mon Air Filter
996 GN
Engine Speed/Timing Sensor Power
439 YL
Lamp Indicator
997 OR
Analog Sensor Power (+ 5V)
491 PK
Hyd Oil Temp Sensor
998 BR
Digital Sensor Return
492 GY
Coolant Temp Sensor Signal
999 WH
Primary Camshft Speed/Timing
495 GN
Fuel Level Signal
C912 GN
Throttle Position
496 WH
Opr Mon Panel Hyd Oil Level
C967 BU
Inlet Air Temperature
499 GY
Opr Mon Implement Oil Filter
K904 GN
Pump Discharge - Signal
A499 BU
Opr Mon Hyd Oil Press
K905 BU
Pump Discharge - (+) B
C468 BU
Engine Oil Level
K906 GN
Swing Brake Sol - Signal
E455 BR
Hydraulic Oil Filter
K907 BU
Swing Brake Sol - (+) B
Accessory Circuits
K909 BU
Backup SW - (+) B
501 GN
Wiper - Front (Low)
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 Pressure SW
L968 OR
Electronic Pump Control PS Valve (-)
519 PK
Thermostat To Refrigerant Press SW
L969 WH
Electronic Pump Control Ps Valve (+)
546 BU
Aux Hyd - Rotate CW
L970 GY
Electronic Pump Control To Switch Common Return
547 OR
Aux Hyd - Rotate CCW
L971 GN
Electronic Pump Control To Travel Pressure Switch
548 GY
Aux Hyd - Open
L972 BU
Low Idle SW
549 PK
Aux Hyd - Close
L973 GN
Fine Swing Cont Relay To Sol Valve
576 PK
Wiper - Aux (Low)
L974 GN
Electronics Pump CtrI Boom Raise Press SW
578 BU
Washer - Aux
L975 PK
Start Aid Cont Lamp 1 Output
590 GY
Wiper SW To Intermittent Module
L977 YL
Trenching Sol
592 BU
DC/DC Converter Power Output
L978 GY
Level Finish Sol
L981 YL
Hydraulic Lock Solenoid Relay
L982 PK
Counterweight Removal Control Solenoid
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
24
7
F
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
22
23
24
25
26
27
28
29
7
F
24
E02167
Machine Harness Connector And Component Locations
SENR1937
June 1997
345B L Excavator
Electrical System
4SS1-UP
4GS1-UP
©
1997 Caterpillar
All Rights Reserved
Printed in U.S.A.
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.
MONITORING SYSTEM.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE CONTROL CIRCUIT
START AID CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.
200-BK
147-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
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
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
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
492-GY-18
491-PK-18
495-GN-18
430-BU-18
496-WH-18
K904-GN-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
K909-BU-18
310-PU-18
A588-GN-18
A588-GN-18
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
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
K907-BU-18
403-GN-18
K904-GN-18
496-WH-18
430-BU-18
495-GN-18
491-PK-18
492-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
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
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
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
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
BK
BK
304-WH-8
304-WH-8
101-RD-4
101-RD-4
403-GN
321-BR-18
109-RD-4
109-RD-4 109-RD-4
403-GN 403-GN
200-BK-4 200-BK-4
A
3
1
7
12
8
9
2
9
1
11
1
5
6
5
3
10
11
7
200-BK-18
200-BK-18
147-PU-18
200-BK-14
892-BR-18
893-GN-18
123-WH-18
8
F400-GY-18
C468-BU-18
2
1
4
3
5
6
A
J
4
F718-BU-18
F717-YL-18
C468-BU-18
123-WH-14
C912-GN-18
F400-GY-18
200-BK-14
E794-YL-18
E793-BU-18
311-WH-18
A751-YL A751-YL
C967-BU
C967-BU
995-BU
995-BU
994-GY
994-GY
997-OR 997-OR
997-OR
997-OR
997-OR
997-OR
997-OR
993-BR 993-BR
993-BR
993-BR
993-BR
993-BR
993-BR
A747-GY
A747-GY
A746-PK
A746-PK
999-WH
999-WH
998-BR
998-BR
996-GN
996-GN WH
BK
BK
BK
OR
OR
OR
OR
OR
OR
GN
GN
GN
YL
200-BK-18
YL
YL
WH
WH
WH
BK
OR
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
200-BK-18
8
9
4
J
C468-BU-18
200-BK-18
A
AA
D789-WH
D789-WH
D790-OR
D790-OR
D790-OR
TRAVEL ALARM
3E-7738
A701-GY
E794-YL-18
2
D791-YL
D791-YL
B
COOLANT
LEVEL SW
096-0744
1
2
D789-WH
A706-GY
MOTOR
A706-GY
A701-GY
UPPER WASHER
7T-8890
LOWER WASHER
7T-8890
BATTERY
3T-5760
ATCH
BATTERY
3T-5760
(NOTE C)
A702-PU
320-OR-18
A702-PU
A703-BR
12
A703-BR
A704-GN
A704-GN
11
9
A705-BU
7
A705-BU
1
998-BR-18
E793-BU-18
L977-YL-18
L978-GY-18
L978-GY-18
763-BU-18
L977-YL-18
151-GN-18
7
200-BK-18
200-BK-18
200-BK-18
1
2
200-BK
3
4
5
6
A770-PK-18
8
4
3
2
1
5
6
311-WH-18
151-GN-18
A762-PU-18
788-YL-18
200-BK-18
311-WH-18
10
892-BR-18
200-BK-18
L982-PK-18
200-BK-18
A762-PU-18
893-GN-18
C912-GN-18
788-YL-18
L981-YL-18
151-GN-18
F718-BU-18
200-BK-18
123-WH-14
K909-BU-18
892-BR-18
893-GN-18
151-GN-18
147-PU-18
998-BR-18
200-BK-18
308-YL-18
200-BK-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
149-PU
A770-PK-18
K909-BU-18
200-BK
POS
NEG
POS
NEG
POS
NEG
NEG
POS
K997-BU-18
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUNDBK-18
BR-18
YL-18
B
C
B
200-BK-18
C468-BU-18
A
M
M
N (NOTE D)
H
G
I
E
D
C
B
A
F
H
G
I
E
D
C
B
A
F
F
BB
200-BK-14
F717-YL-18
BB
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
200-BK-14
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
1
2
200-BK-14
D791-YL
403-GN
2
C
C B
B
9 8 7 6 5 4 3 2
1
9 8 7 6 5 4 3 2
1
1
C B
WH-18
A762-PU-18
NN
(NOTE H)
SS
1
1
4
2
B
A/C CLUTCH SOL
(NOTE E)
ALT
R
B+
788-YL-18
6V-2455
ATCH
START AID
COOLANT TEMP SW
3E-6449
E
C
304-WH-8
C
1
2
386-PK-18
2
616-BU
1
ENG OIL
LEVEL SW
111-4759
101-RD-4
DISCONNECT SW.
7N-0719
ALTERNATOR
100-5047
A762-PU-18
ALT BREAKER
9S-4693
788-YL-18
C
311-WH-18
C
C
C
1
2
BK-18
C
2
2
1
T°
YY
UU
VV
109-RD-4
5
4
6
3
1
2
BACKUP
RESISTOR
102-8017
ECM GND STRAP
ENG OIL PRESS
HYD LOCK SOL RELAY
111-4871
5
3
4
6
2
1
7
8
9
10
11
12
GND
USER DEFN SHUTDOWN
4
506-PU-18
34
35
36
CHASSIS
L42
L41
20
22
1
23
25
+5V
SENSOR COMMON
FUEL TEMP
L29
L30
INTAKE MANF AIR TEMP
MAIN RELAY
3T-0376
CAB/CHASSIS LAMP RELAY
111-4871
COOLANT TEMP
OIL PRESSURE
578-BU-18
ATM PRESSURE
BOOST PRESSURE
4
5
80A
ENG SP/TMG
200-BK-18
ENG SP/TMG COMMON
200-BK-18
+V ENG SP/TMG
MOTOR
A
SENSOR
FUEL TEMP
102-2240
6
3
12
2
1
7
11
8
9
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
10
A
SENSOR
INTAKE MANF
AIR TEMP
107-8618
SENSOR
COOLANT TEMP
102-2240
SENSOR
OIL PRESSURE
111-2350
B
SENSOR
BOOST PRESSURE
111-2351
CHASSIS
L30
SENSOR
SPEED/TIMING
129-6628
L28
DIODE
121-1022
L28
L29
ENG SP/TMG
ENG SP/TMG COMMON
+V ENG SP/TMG
L30
L29
L41
L42
L42
L41
BOOST PRESSURE
ATM PRESSURE
OIL PRESSURE
COOLANT TEMP
INTAKE MANF AIR TEMP
+5V
SENSOR COMMON
SENSOR COMMON
ZZ
+5V
+5V
SENSOR COMMON
SENSOR COMMON
+5V
+5V
SENSOR COMMON
200-BK-18
306-GN-18
FUEL TEMP
SENSOR COMMON
177-RD-8
+5V
C
B
A
200-BK-18
A
B
C
386-PK-18
C
616-BU
B
A
B
C
A
A
B
C
306-GN-18
C
304-WH-8
DECEL
ACCEL
REMOVAL SW
114-0421
1
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
200-BK-18
L971-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
ENG/PUMP CONT
145-3093
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
403-GN-18
788-YL-18
A762-PU-18
C468-BU-18
492-GY-18
L971-GN-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
2
2
615-YL-18
ATCH
CTWT REMOVAL
CONT SOL
123-2514
3
AD
4
1
NOTE E : REM'D WITH ATCH HEATER OPTION.
NN
(NOTE H)
NN
(NOTE H)
NN
(NOTE H)
177-RD-14
177-RD-14
INJECTOR 1
INJECTOR 2
INJECTOR 3
INJECTOR 4
INJECTOR 5
INJECTOR
116-5414
SOL 6
INJECTOR
116-5414
SOL 5
INJECTOR
116-5414
SOL 4
INJECTOR
116-5414
SOL 3
INJECTOR
116-5414
SOL 2
1
A
200-BK-18
ENGINE
B
C
B
26
27
28
30
B
2
1
29
1
177-RD-14
1
4
3
2
177-RD-14
177-RD-14
177-RD-14
37
2
23
20
177-RD-14
8
306-GN-18
14
2
3
30
36
MOTOR
31
H
177-RD-14
200-BK-18
L28
L28
308-YL-18
177-RD-6
K909-BU-18
307-OR-18
200-BK-18
177-RD-14
3
1
4
2
1
3
4
2
+B
SIGNAL
32
CHASSIS
STARTER
MOTOR
106-8553
33
113-OR-18
113-OR-18
SIGNAL
304-WH-8
G
S
MTR BAT
SIGNAL
GROUND
200-BK-18
BK
YL
101-RD-4
RD-00
HYD OIL
FILTER SW
129-8054
RD-00
B
2
200-BK-18
RD-00
RD-00
1
177-RD-14
ATCH
SUCTION LINE
SHUTOFF LIMIT SW
3E-5181
B
HYD OIL
FILTER SW
129-8054
GROUND
SIGNAL
+B
200-BK-18
E455-BR-18
177-RD-14
BB
B
GROUND STRAP
128-8886
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
112-PU-6
HYD OIL
TEMP SENDER
4I-5394
FUEL LEVEL
SENSOR
105-9911
4
1
2
3
1
2
1
HYD TANK
PRESS SW
107-0615
2
2
HYD OIL
LEVEL SW
111-4760
T°
1
B
B
200-BK-18
386-PK-18
386-PK-18
12
11
10
9
8
7
200-BK-18
6
5
496-WH-18
4
3
2
1
AA
EE(NOTE C)
307-OR-18
VVAD
AD
177-RD-6
109-RD-6
101-RD-6
111-RD-14
101-RD-6
147-PU-18
101-RD-6
MAIN BREAKER
9S-4693
118-GY
124-GN-14
200-BK-18
12
4
10
2
6
112-PU-14
200-BK-14
200-BK-14
1
2
K912-GN-18
K911-PK-18
2
1
INJECTOR COM 5&6
403-GN-18
185-YL-18
INJECTOR COM 1&2
200-BK-14
615-YL-18
K911-PK-18
K912-GN-18
149-PU
200-BK-14
A586-OR-18
INJECTOR COM 3&4
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
519-PK-18
513-OR-18
519-PK-18
OR
PK
REFRIGERANT
LOW PRESS SW
114-5333 (NOTE A)
(NOTE E)
200-BK-14
892-BR-18
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
615-YL
893-GN-18
615-YL
INJECTOR 6
506-PU-18
INJECTOR
116-5414
SOL 1
112-PU-14
112-PU-14
180-GN
189-RD-14
5
17
27
6
12
590-GY-18
501-GN-18
18
A586-OR-18
22
28
34
SENSOR COM
ENG CONT
115-3055
1
2
2
1
103-RD-18
8
103-RD-18
508-PU-18
509-WH-18
A
511-BR-18
512-GN-18
118-GY
39
40
10
103-RD-18
11
21
8
140-BU
4
105-RD
E794-YL-18
103-RD-18
29
E793-BU-18
308-YL-18
123-WH-18
892-BR-18
499-GY-18
496-WH-18
A499-BU-18
113-OR-18
893-GN-18
L969-WH-18
L968-OR-18
998-BR-18
K915-GN-18
K907-BU-18
F718-BU-18
200-BK-18
308-YL-18
147-PU-18
200-BK-18
3
115-PK-14
37
F717-YL-18
519-PK-18
24
6
15
CAT DATA LINK (-)
CAT DATA LINK (+)
THROTTLE
+B
C912-GN-18
F400-GY-18
123-WH
C
C
112-PU-6
C
B
E794-YL-18
E793-BU-18
893-GN-18
892-BR-18
101-RD-4
120-YL
191-WH-14
200-BK
321-BR-18
6
1
2
3
4
38
19
18
17
16
5
14
13
12
7
2
40
39
5
9
32
26
10A
10A
15A
10A
10A
10A
A A
15A
7
8
1
6
5
4
3
2
PLATFORMCHASSIS
GROUND STRAP
7G-1060
K909-BU-18
A768-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
10A
499-GY-18
10A
10A
10A
10A
10A
10A
10A
10A
10A
15A
10A
15A
L971-GN-18
E/P CONT
HYD LOCK SOL
140-BU
10A
A499-BU-18
892-BR-18
893-GN-18
998-BR-18
304-WH-8
25
AUX CKT
24
ATCH LUBRICATOR
21
19
16
6
8
1
7
4
5
3
2
JJJ
J
J
J
FUSE BASE
111-4812
1
2
3
4
5
6
7
8
9
10
11
12
506-PU-18
113-OR-18
F718-BU-18
F717-YL-18
998-BR-18
F718-BU-18
F717-YL-18
998-BR-18
439-YL-18
147-PU-18
151-GN-18
151-GN-18
151-GN-18
133-OR-14
P
L45
A
15
2
1
200-BK-18
200-BK-18
133-OR-14
A499-BU-18
F400-GY-18
892-BR-18
893-GN-18
C912-GN-18
998-BR-18
F717-YL-18
200-BK-14
499-GY-18
200-BK-18
C
B
A
403-GN-18
P
152-BU
L52
118-GY
13
112-PU-6
152-BU
A499-BU-18
200-BK-18
200-BK-18200-BK-18
L52
200-BK-18
11
10
38
200-BK-18 200-BK-18L52
35
177-RD-8
3
33
152-BU
439-YL-18
L972-BU-18
615-YL
A755-PK-18
L968-OR-18
763-BU-18
9
A756-BU-18
A771-PU-18
L969-WH-18
L971-GN-18
A757-GY-18
L970-GY-18
788-YL-18
A762-PU-18
430-BU-18
NOTE C : USE WITH COLD WEATHER.
ZZ
321-BR-18
F400-GY-18
492-GY-18
491-PK-18
495-GN-18
A758-BR-18
496-WH-18
308-YL-18
L977-YL-18
235-BK-18
892-BR-18
893-GN-18
7
4
K997-BU-18
3
235-BK-18
C468-BU-18
K907-BU-18
ATA DATA LINK (-)
K915-GN-18
K911-PK-18
ATA DATA LINK (+)
K912-GN-18
1
L909-BU-18
L908-OR-18
B
K904-GN-18
K997-BU-18
C
L54
235-BK-18
L974-GN-18
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
L978-GY-18
200-BK-18
114-RD
114-RD
114-RD
C912-GN-18
412-BU-18
K997-BU-18
A
546-BU-18
1
8
6
10
12
7
9
11
2
J704-WH-18
547-OR-18
K905-RD-18
191-WH-14
5
K997-BU-18
4
200-BK-14
L970-GY-18
K905-RD-18
MONITOR +B OUT
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
ECM THRT
152-BU
EPR VALVE (+)
J704-WH-18
961-GN-18
GOV ACTR (B)
GOV ACTR FDBK
COOLANT LEVEL SW
TRAVEL SPEED SOL
ENG SPEED SENSOR (-)
ENG SPEED SENSOR (+)
TRENCHING SOL
152-BU
80A
3
549-PK-18
548-GY-18
IMPLEMENT SW
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
FRONT PUMP PRESS SENSOR
HYD OIL LEVEL SW
K905-RD-18
AIR CLEANER SENSOR
HYD OIL TEMP SENSOR
RS485 - (VALVE CONT)
RS485 + (VALVE CONT)
RS232C (GND)
RS232C (RX)
COOLANT SENSOR
9
20
10
28
152-BU
31
26
200-BK
J704-WH-18
546-BU-18
13
30
29
35
40
2
6
39
547-OR-18
A
6
512-GN-18
511-BR-18
509-WH-18
508-PU-18
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
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
RS232C (RX)
TRAVEL SW
HYD OIL FILTER INDICATOR
DEGITAL OUT (-)
18
RS485 - (RADIO CONT)
CAT DATA LINK (+)19
+B
+B
AIR INDICATOR
FINE SWING SW
ELEC GOV THROTTLE DIAL
RS485(+)
BOOM RAISE PRESS SW
LEVEL FINISH SOL
ENG POWER CHANGE SOL
OPTION PRESS SW
32
33
25
KEY SW ON
CAT DATA LINK (-)
26
CAB
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
OPTION SW37
4
3
OPTION SENSOR (PWM)
1
16
19
5
OPTION SENSOR (PWM)
32
33
DIGITAL OUT (-)
DIGITAL OUT (-)
14
11
34
JOY STICK +B OUT
L1
A
123-WH-14
133-OR-14
123-WH-14
179-RD
ATCH FINE SWING
AUX CKT
179-RD
DOME LAMP
6C-9121
2
3
4
5
6
1
8
7
2
1
J704-WH-18
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
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
F718-BU-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
B
B
C538-OR-18
B
C537-GN-18
A
A
L15
L50
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
150-RD-18
114-RD
154-RD-18
189-RD
111-RD-14
K909-BU-18
133-OR-14
150-RD-18
133-OR-14
176-YL
K909-BU-18
786-GN-18
150-RD-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
AUX CKT
HYD LOCK SW
123-WH-14
ECM
386-PK-18
200-BK-18
129-BU
403-GN-18
615-YL-18
103-RD-18
C538-OR-18
K997-BU-18
F717-YL-18
C912-GN-18
12
WW
306-GN-18
200-BK-18
200-BK-18
177-RD-14
200-B
K-18
321-BR-18
200-BK
430-BU-18
412-BU-18
310-PU-18
311-WH-18
123-WH-18
430-BU-18
200-BK-18
200-BK-18
412-BU-18
111-RD-14
189-RD
154-RD-18
154-RD-18
189-RD
177-RD-14
111-RD-14
RELAY PANEL
E793-BU-18
E794-YL-18
893-GN-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
892-BR-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
200-BK-18
HH
GG
FF
EE
DD
CC
BB
AA
128-8886
116-0242
116-0080
128-8898
132-1805
125-4727
116-0080
128-8884
A-9
H-8
H-8
A-8
I-8
I-8
I-8
A-8
CABLE AS.
VV
WIRE AS.
L974-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-14
A586-OR-18
A579-OR
200-BK-14
K
J
H
F
E
D
C
B
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
1
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
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
105-RD
439-YL-18
A770-PK-18
A769-GY-18
A768-BU-18
K906-GN-18
615-YL-18
L973-GN-18
578-BU-18
307-OR-18
308-YL-18
791-PK-18
786-GN-18
185-YL-18
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
L52
788-YL-18
615-YL
200-BK-18
A762-PU-18
C468-BU-18
200-BK-18
304-WH-8
322-GY
K909-BU-18
786-GN-18
K909-BU-18
607-PK
311-WH-18
P
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
HH
AA
H
2
A
H
4
A
115-PK-14
200-BK-18
177-RD-14
320-OR-18
200-BK-18
123-WH-18
E793-BU-18
L969-WH-18
E794-YL-18
893-GN-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
L8
L20
306-GN-18
200-BK-18
200-BK-18
200-BK-18
L8
616-BU
547-OR-18
304-WH-8
K905-RD-14
150-RD-18
176-YL
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
K905-RD-14
A
L973-GN-18
L15
L17
ANTENNA
CABLE
8R-6111
L40
L39
L39
L8
L38
L37
YY
147-PU-18
615-YL-18
412-BU-18
615-YL-18
L37
L38
133-0R-14
578-BU-18
177-RD-14
L973-GN-18
322-GY
L39
200-BK-18
115-PK-14
200-BK-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
15A
200-BK-18
200-BK-18
200-BK-18
L21
XX
L19
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L3
L18
L22
L21
L18
L34
L34
L8
L19
L3
L34
L19
L3
L4
L25
L25
L4
L33
L21
168-RD
L31
L9
114-RD
L12
L13
AUX CKT
200-BK-18
L9
592-BU-18
L31
HH
L33
L33
L33
L33
K915-GN-18
L20
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
L2
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
615-YL-18
A769-GY-18
892-BR-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
129-BU
109-RD-4
129-BU
SWITCH PANEL
113-OR-18
AB
403-GN
WW
310-PU-18
615-YL-18
615-YL-18
109-RD-4
200-BK-18
308-YL-18
H
ATCH START
AID SW
111-4784
546-BU-18
114-RD
185-YL-18
112-PU-14
L5
151-GN-18
L20
L20
LOWER
WIPER SW
111-4785
LOWER
WASHER SW
111-4786
H
L11
ATCH FINE
SWING CONT SW
111-4788
115-PK-14
308-YL-18
HH
123-WH-18
BACKUP
EPR VALVE SW
114-0421
H H
BACKUP
GOV SW
110-7884
E793-BU-18
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
CC
308-YL-18
B
BA
A
2
1
B
123-WH-14
519-PK-18
ATCH
FINE SWING
SOL
107-7056
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
1
109-RD-4
2
J704-WH-18
J704-WH-18
RH SPKR (-)
RH SPKR (+)
LH SPKR (-)
A
LH SPKR (+)
6
5
3
4
2
1
8
547-OR-18
7
L8
152-BU
1
B
2
1
C
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
TRAVEL
PRESS SW
106-0179
L48
L47
L47
L48
A
B
B
B
DB
322-GY
L51
L45
607-PK
L49
L51
L49
L50
L51
513-OR-18
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
893-GN-18
892-BR-18
4
616-BU
200-BK
3
A499-BU-18
1
2
2
103-RD-18
118-GY
A579-OR
F
615-YL
615-YL
200-BK-14
L42
893-GN-18
519-PK-18
386-PK-18
306-GN-18
491-PK-18
499-GY-18
496-WH-18
A499-BU-18
113-OR-18
113-OR-18
1
180-GN
200-BK-18
200-BK-18
386-PK-18
WH-18
WH-18
WH-18
WH-18
306-GN-18
B
F
491-PK-18
E455-BR-18
200-BK-18
499-GY-18
A499-BU-18
L44
A571-PU
3
C912-GN-18
499-GY-18
892-BR-18
H
4
A572-PK
F400-GY-18
UPPER WIPER
MOTOR
134-5551
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
M
A572-PK
A571-PU
H
180-GN
961-GN-18
961-GN-18
549-PK-18
200-BK-14
AE
4
NOTE H : USE WITH CTWT REMOVAL
H
H
J704-WH-18
200-BK
548-GY-18
J704-WH-18
101-RD-4
308-Yl-18
GND
200-BK-18
200-BK-18
J
J
615-YL
101-RD-4
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
123-WH-18
200-BK-18
893-GN-18
892-BR-18
E793-BU-18
E794-YL-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
B+
P
A513-RD-18
T
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
MOTOR
N
L
200-BK
105-RD
A586-OR-18
549-PK-18
549-PK-18
C537-GN-18
HYD OIL FILTER SW
113-OR-18
H
L7
A513-RD-18
548-GY-18
ANTENNA CABLE
134-4430
501-GN-18
BR
GY
BK
592-BU-18
200-BK-18
L24
12 VDC RADIO
103-8525
REMOVAL TOOL
7Y-5493
179-RD
322-GY
168-RD
150-RD-18
K912-GN-18
A
B
C
D
E
F
G
H
J
616-BU
A
C538-OR-18
201-BK-18
F400-GY-18
200-BK-18
C
B
A
OR
GN
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
123-WH-14
310-PU-18
J704-WH-18
114-RD
A
B
C
J704-WH-18
J704-WH-18
A513-RD-18
592-BU-18
177-RD-14
+B
COMP
GND
SUN+
SUN-
5
320-OR-18
CAB
C
154-RD-18
189-RD
L22
RH SPKR (+)
LH SPKR (-)
K905-RD-14
LH SPKR (+)
L22
111-RD-14
150-RD-18
F718-BU-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
200-BK-14
200-BK-18
200-BK
200-BK-18
CAB
129-BU
OPERATOR STATION
OPTION SW
108-BU
1
NOTE G : NOT USED WITH FINE SWING CONTROL
114-RD
140-BU
322-GY
200-BK-18
6
113-OR-18
113-OR-18
129-BU
607-PK
3
200-BK-18
103-RD-18
118-GY
A579-OR
A579-OR
108-BU
6
123-WH-14
200-BK
176-YL
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
AC
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
B
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
439-YL-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
K
6
A
154-RD-18
CONV (OUT)
200-BK
K
576-PK
CONV (MEM)
J704-WH-18
B
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
133-OR-14
L21
508-PU-18
L20
L5
L11
L12
H
L7
L6
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
F718-BU-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
133-OR-14
AC
K997-BU-18
499-GY-18
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
F717-YL-18
998-BR-18
HYD TK IND439-YL-18
L14
786-GN-18
E
L7
L6
L7
L1
AC
AE
NOTE D : USE WITH FALLING OBJECT GUARD.
B
2
L1
K905-RD-18
F
WIRES 892-BR & 893-GN TO BE TWISTED AROUND
EACH OTHER AT LEAST 1 TURN PER 25 mm.
ATCH
BOOM LAMP
5I-8250
L20
322-GY
CHASSIS
OPERATOR STATION
S4
S3
S2
S1
COM
306-GN-18
AB
132-1857
125-4848
141-9160
141-9161
128-7337
128-7336
141-2135
143-3676
141-8658
141-8659
130-2211
129-8144
125-4868
143-5375
121-1044
E-7
B-2
H-3
D-3
G-1
E-1
F-8
A-9
A-3
C-2
G-1
G-1
A-2
A-3
A-6
108-BU
3
322-GY
A
607-PK
HORN
7T-0970
M
N (NOTE D)
M
200-BK
K
607-PK
WIRES E793-BU & E794-YL TO BE TWISTED AROUND
EACH OTHER AT LEAST 1 TURN PER 25 mm.
200-BK
4
200-BK
616-BU
200-BK
616-BU
H
200-BK
MONITOR
106-0172
200-BK
SWITCH PANEL
128-8909
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
TT
128-8936
111-4831
128-8937
111-4830
111-4829
128-8938
116-0237
I-8
F-8
G-7
F-8
F-8
F-8
D-4(NOTE G)
+1
-
MOTOR
SERVICE
METER
6T-7337
CHASSIS
LAMP
5I-8251
THROTTLE
POS SW
106-0107
ATCH
BOOM LAMP
5I-8250
L54
322-GY
L6
E
E
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 345B-HYD EXCAVATOR. (125-4860 CHG01)
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
TO MACHINE STRUCTURE
ENG SPEED
PICKUP SENSOR
SENSOR
ATMOSPHERIC PRESSURE
111-8125
SERVICE CONNECTOR
E794-YL-18
ATCH CTWT
ADJ CONNECTOR
FACTORY
200-BK-18
200-BK-18
CONN 50
CONN 51
CONN 52
CONN 49
CONN 48
CONN 29CONN 28
CONN 25
CONN 24
CONN 30
CONN 31
CONN 32
CONN 33
CONN 34
CONN 35
CONN 36
CONN 37
CONN 38
CONN 39
CONN 40
CONN 41
CONN 42
CONN 44
CONN 45
CONN 46
CONN 47
CONN 60
CONN 18
CONN 16
CONN 15
CONN 14
CONN 13
CONN 12
CONN 11CONN 10CONN 9
CONN 17
CONN 19
CONN 8
CONN 7
CONN 6
CONN 5
CONN 3
CONN 4
CONN 20
CONN 23
CONN 27
CONN 22
CONN 21
CONN 89
CONN 43
CONN 1
CONN 2
E01408
200-BK