manual

1. RENR3762-02
30
Page,
(Dimensions:
39
inches
x
28
inches)
Pressure
Symbol
T
Temperature
Symbol
Level
Symbol
Flow
Symbol
Circuit Breaker
Symbol
Harness and Wire Symbols
Symbols
Symbols and Definitions
Harness And Wire Electrical Schematic Symbols
Fuse: A component in an electrical circuit that will open the circuit if too much current flows
through it.
Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The
circle indicates that the component has screw terminals and a wire can be disconnected from it.
Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.).
No circle indicates that the wire cannot be disconnected from the component.
Ground (Wired): This indicates that the component is connected to a grounded wire. The
grounded wire is fastened to the machine.
Ground (Case): This indicates that the component does not have a wire connected to ground.
It is grounded by being fastened to the machine.
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.
T
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.
Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is
activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch)
that make electromagnet when current flows through them. It also has an internal switch that places
the latch coil circuit open at the time the coil latches.
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.
1
2
AG-C4
111-7898
L-C12
3E-5179
9X-1123
Component
Part Number
Pin or Socket Number
Part Number: for Connector Receptacle
Part Number: for Connector Plug
Harness Identification Letter(s):
(A, B, C, ..., AA, AB, AC, ...)
Plug
325-AG135 PK-14
Wire Color
Wire Gauge
Receptacle
1
1
2
2
Sure-Seal connector: Typical representation
of a Sure-Seal connector. The plug and receptacle
contain both pins and sockets.
Deutsch connector: Typical representation
of a Deutsch connector. The plug contains all
sockets and the receptacle contains all pins.
Fuse (5 Amps)
5A
Harness identification code:
This example indicates wire group 325,
wire 135 in harness "AG".
L-C12
3E-5179
Wire, Cable, or Harness
Assembly Identification: Includes
Harness Identification Letters and
Harness Connector Serialization
Codes (see sample).
Harness Connector Serialization Code:
The "C" stands for "Connector" and the
number indicates which connector in the
harness (C1, C2, C3, ...).
RENR3762-02
August 2011
345B Series II Excavator
Electrical System
ALB1-UP
ALD1-UP
AKJ1-UP
AMJ1-UP
AGS1-UP
DCW1-UP
AKX1-UP
©2011 Caterpillar
All Rights Reserved
Printed in U.S.A.
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Travel G-9 1 Sensor - Engine Speed/Tmg B-8 18
Alternator D-8 2 Sensor - Fuel Level A-4 20
Assembly - Terminal Block F-8 D Sensor - Fuel Temperature A-8 21
Batteries - 12VDC H-8, I-8 3 Sensor - Intake Manifold Air Temperature A-8 17
Breaker - Alternator I-8 D Sensor - Oil Pressure B-8 18
Breaker - Main I-8 D Sensor - Pump Discharge Press B-7 19
Control - Engine A-9, B-9 5 Solenoid - A/C Clutch D-9 22
Control - Engine/Pump F-2 C Solenoid - CTWT Removal Cont (ATCH) C-7 31
Controller - Wiper/Washer E-1 E Solenoid - Eng/Pump Control A-6 4
Converter - Voltage C-5 A Solenoid - Fan Speed Control A-7 35
Diode - Main Relay G-7, H-7 D Solenoid - Fine Swing (ATCH) E-7 14
Engine Speed Pickup C-9 26 Solenoid - Hydraulic Lock I-1 G
Fuses I-4, I-5 B Solenoid - Level Finish A-7 4
Ground - Cab B-5 7 Solenoid - Start Aid (ATCH) I-9 23
Ground - Cab E-1 E Solenoid - Swing Brake E-7 14
Ground - Chassis B-3 8 Solenoid - Travel Speed A-7 4
Ground - Chassis C-8 34 Solenoid - Trenching A-6 4
Ground - Chassis B-7 D Solenoids - Injectors 1-6 A-8 24
Ground - Engine Control B-9 5 Switch - Air Cleaner Flow H-9 25
Ground - Platform H-1 G Switch - Aux Hydraulic Pressure H-3 36
Ground - Platform G-2 G Switch - Backup EPR Valve D-5 C
Ground - Relay Panel H-8 D Switch - Backup Governor D-5 C
Ground Strap - Chassis to Platform I-6 10 Switch - Boom Raise Pressure E-8 14
Horn A-2, B-2 8 Switch - Coolant Level I-9 37
Lamp - Cab G-1 12 Switch - CTWT Removal (ATCH) C-7 31
Lamp - Boom (ATCH) A-1, B-1 33 Switch - Disconnect I-8 D
Lighter E-1 E Switch - Engine Oil Level D-9 26
Meter - Service F-1 E Switch - Fine Swing Cont (ATCH) D-4 C
Monitor F-1 E Switch - Horn I-1 B
Motor - Lower Wiper H-1 11 Switch - Hyd Tank Press A-4 27
Motor - Starter C-8 9 Switch - Hydraulic Control (ATCH) D-4 C
Motor - Upper Wiper C-5 12 Switch - Hydraulic Oil Filter A-5 15
Motor - Lower Washer I-9 D Switch - Hydraulic Oil Level A-5 15
Motor - Upper Washer I-9 D Switch - Implement Pressure E-8 14
Radio - 12VDC C-6 A Switch - Key F-3 C
Relay - Boom Lamp I-7 D Switch - Lower Washer D-3 C
Relay - Cab/Chassis Lamp I-7 D Switch - Lower Wiper D-3 C
Relay - Horn I-7 D Switch - Neutral Start Limit I-1 B
Relay - Hydraulic Lock Solenoid I-7 D Switch - One Touch Low Idle F-2 C
Relay - Main G-7 D Switch - Refrigerant Low Press D-9 22
Relay - Neutral Start F-7 D Switch - Start Aid (ATCH) D-5 C
Relay - Start F-8 D Switch - Start Aid Coolant Temp D-9 18
Relay - Timer E-7, F-7 D Switch - Suction Line Shutoff Limit A-6 15
Resistor - Backup I-8 D Switch - Throttle Position E-3 C
Sender - Hydraulic Oil Temp A-4 15 Switch - Travel Pressure E-8 14
Sensor - Sun Load F-1 E Switch Panel F-2 C
Sensor - ATM Pressure B-8 16 Unit - A/C G-5, H-5 29
Sensor - Boost Pressure B-8 17 Unit - Heater (ATCH) G-5, H-5 29
Sensor - Coolant Temperature B-8 18
Machine locations are repeated for components located close together.
A = Located inside of cab. E = Located in monitor area.
B = Located in operator's left console area. F = Located around pilot manifold.
C = Located in operator's right console area. G =Located under platform.
D = Located around relay panel.
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 A-9 16
CONN 2 B-8 26
CONN 3 C-8 26
CONN 4 C-8 26
CONN 5 C-8 26
CONN 6 C-8 26
CONN 7 F-9 D
CONN 8 F-9 D
CONN 9 F-9 D
CONN 10 G-9 D
CONN 11 G-9 D
CONN 12 F-8 D
CONN 13 G-8 D
CONN 14 G-8 D
CONN 15 G-8 D
CONN 16 ET & ECAP H-8 D
CONN 17 D-7 31
CONN 18 C-6 10
CONN 19 A-6 15
CONN 20 C-5 10
CONN 21 C-5 G
CONN 22 C-4, C-5 G
CONN 23 F-5 C
CONN 24 F-5 C
CONN 25 F-5 C
CONN 26 F-5 C
CONN 27 H-5 B
CONN 28 H-4 B
CONN 29 H-4 B
CONN 30 H-4 B
CONN 31 H-4 B
CONN 32 F-4 C
CONN 33 F-4 C
CONN 34 F-4 C
CONN 35 A-3 6
CONN 36 B-3 6
CONN 37 B-3 30
CONN 38 C-3 F
CONN 39 H-3 B
CONN 40 Factory Adj 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.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6425 Coolant Temperature (Start Aid) 38 ± 3° C 27° C Min. Normally Closed
(100 ± 5.4° F) (80.6° F)
106-0179 Implement Pressure 1520 ± 98 kPa 1127 kPa MIN Normally Open
Travel Pressure (224.4 ± 14.21 psi) (163.5 psi MIN)
106-0180 Boom Raise Pressure 2646.00 ± 196.00 kPa 2156.00 ± 196.00 kPa Normally Open
(383.77 ± 28.43 psi) (312.70 ± 28.43 psi)
106-0181 Aux Hydraulic Pressure 490 ± 49 kPa MAX 290 kPa MIN Normally Open
ATCH Hammer Pressure (71 ± 7 psi MAX) (42 psi MIN)
107-0615 Hydraulic Tank Pressure 48 ± 14 kPa 24 kPa MIN Normally Closed
(7.0 ± 2.0 psi) (3.5 psi MIN)
114-5333 Refrigerant Pressure (AC) 275 to 1750 kPa¹ -- Normally Open²
(40 to 255 psi) --
¹ With increasing pressure the closed condition can be maintained up to 2800 kPa (405 psi), with decreasing pressure
the closed position can be maintained down to 170 kPa (25 psi).
² Contact position at the contacts of the harness connector.
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
3E-6332 Solenoid: Valve - Start Aid 6.0
4I-5394 Sender: Hydraulic Oil Temp 6130 to 7500
102-8017 Resistor: Backup 52.0 ± 2.6
107-7056 Solenoid: Atch Fine Swing 34.0 ± 0.5
111-9916 Solenoid: Engine Pump Control 11.7 ± 1.2
121-1490 Solenoid:
Level Finish
32.0 ± 3.2
Trenching
121-1491 Solenoid:
Hydraulic Lock
32.0 ± 3.2
Swing Brake
Travel Speed
¹ At room temperature.
Machine Harness Connector And Component Locations
31
37
35
33
34
36
14
4
8
31
33
22
34
35
37
36
Wire Description
Wire
Number
Wire Color Description
Wire
Number
Wire Color Description
Power Distribution Circuits Accessory Circuits (cont'd)
101 RD Bat (+) (Not Application Specific) A586 OR Wiper SW To Wiper Cont
103 RD Aux Ckt A588 GN Safety Sol Relay To Sol
105 RD Key Start Sw C537 GN A/C Photo Sensor + Sig
108 BU Atch Fan C538 OR A/C Photo Sensor - Sig
109 RD Alt Output (+) Term. Lighting Circuits
111 RD Aux Ckt 607 PK Flood Lamps - Front
112 PU Main Power Rly Output 615 YL Cab Flood Lamp/Rops
113 OR Opr Mon Panel B (+) Switched 616 BU Boom Flood Lamp
114 GN Warning Horn (Forward) Control Circuits
115 PK Cab/Chassis Lamp 763 BU Torque Converter Sw
118 GY Washer/Wiper 786 RD Engine Speed Cont
120 YL Radio 788 YL Engine Speed (+)
123 WH ECM 791 PK Switch Panel / Cab/Chassis Lamp Rly
124 GN A/C A701 GY Injector #1
129 BU Cigar Lighter A702 PU Injector #2
133 OR Atch Lamps A703 BR Injector #3
140 BU Atch Lubricator A704 GN Injector #4
147 PU Atch Fine Swing A705 BU Injector #5
149 PU Boom Lamp A706 GY Injector #6
150 RD Bat (+) A746 PK Turbo Outlet Pressure
151 GN Neut Start Limit Sw to Hyd Lock Sol Rly A747 GY Atmospheric Pressure
152 BU Lower Washer/Wiper A751 YL After Cooler Temp
154 RD Neut Start Limit Sw to Neut Start Rly A755 PK Throttle Sw #1
168 RD Aux Ckt A756 BU Throttle Sw #2
176 YL Aux Ckt A757 GY Throttle Sw #3
177 RD Main Brkr A758 BR Throttle Sw #4
179 RD Aux Ckt A762 PU Elec Pump Cont Eng Speed Ground
180 GN Aux Ckt A768 BU Pump Control Valve #1 (+)
185 YL Backup EPR Valve Sw A769 GY Pump Control Valve #2 (-)
189 RD Timer Relay A770 PK Elec Pump Cont Bypass Sw
191 WH Atch Hydraulic Control A771 PU Float Sw
Ground Circuits E793 BU ATA Data Link (-)
200 BK Main Chassis E794 YL ATA Data Link (+)
201 BK Operator Monitor Return E799 BR PWM #1 And #2 Return
235 BK Electronic Pump Ctrl Gnd F700 BU PWM #1 Out (3.5A)
Basic Machine Circuits F701 BR PWM #2 Out (3.5A)
304 WH Starter Relay No. 1 Output F702 GN Throttle (App Specific)
306 GN Starter Relay Coil To Neut Start SW Or F704 OR RH Turbine Inlet Exh Temp
307 OR Key Start SW To Neutral Start SW Or F713 OR Left Turbo Inlet Press
308 YL Main Power Relay Coil F714 PK Right Turbo Inlet Press
310 PU Start Aid SW To Start Aid Sol F717 YL Sw 4
311 WH Start Aid Sol To Temp SW F718 BU Sw 5
320 RD Horn Relay Coil To Sw J704 WH Hydraulic Lock Solenoid Relay
321 BR Backup Alarm Lamp Travel Alarm 892 BR CAT Data Link (-)
322 GY Warning Horn (Forward) 893 GN CAT Data Link (+)
386 PK Air Shutoff Solenoid Enable 961 GN Atch Hyd Cont Sw
Monitoring Circuits 993 BR Analog Sensor Common
403 GN Alternator (R) Term. 994 GY Oil Pressure (Filtered)
412 BU Operator Monitor Cool Flow 995 BU Coolant Temperature
430 BU Operator Monitor Air Filter 996 GN Engine Speed/Timing Sensor Power
439 YL Lamp Indicator 997 OR Analog Sensor Power (+5V)
491 PK Hydraulic Oil Temp Sensor 998 BR Digital Sensor Return
492 GY Coolant Sensor 999 WH Primary Camshaft Speed/Timing
495 GN Fuel Level C912 GN Throttle Position
496 WH Operator Monitor Panel Hyd Oil Level C967 BU Inlet Air Temperature
499 GY Operator Monitor Implement Oil Filter K904 GN Pump Discharge - Signal
A499 BU Operator Monitor Hydraulic Oil Press K905 RD 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
F400 GY Low Oil Pressure K909 BU Backup SW - +B
Accessory Circuits K911 PK E/P Controller - RS485 (+)
501 GN Wiper - Front (Low) K912 GN E/P Controller - RS485 (-)
506 PU Washer - Front K915 GN Fine Swing Sw - E/P Controller
508 PU Radio Speaker - Left K997 BU (+) V Sensor
509 WH Radio Speaker - Left (Common) L908 OR Controller RS-232C TX
511 BR Radio Speaker - Right L909 BU Controller RS-232C RX
512 GN Radio Speaker - Right (Common) L968 OR Electronic Pump Control Ps Valve (-)
513 OR Refrig Low Press Sw / A/C clutch Sol L969 WH Electronic Pump Control Ps Valve (+)
519 PK A/C Unit/ Refrig Low Press Sw L970 GY Elec Pump Cont To Sw Common Ret
546 BU Aux Hyd - Rotate CW L971 GN Elec Pump Cont To Travel Press Sw
547 OR Aux Hyd - Rotate CCW L972 BU Low Idle SW
548 GY Aux Hyd - Open L973 GN Fine Swing Cont Relay To Sol Valve
549 PK Aux Hyd - Close L974 GN Elec Pump Ctrl Boom Raise Press SW
576 PK Wiper - Aux L977 YL Trenching Sol
578 BU Washer - Aux L978 GY Level Finish Sol
586 BR Aux Hydraulic - Close L981 YL Hydraulic Lock Solenoid Relay
590 GY Wiper Sw To Intermittent Module L982 PK Counterweight Removal Cont Solenoid
592 BU DC/DC Converter Power Output L983 WH Injector Common 1 & 2
A513 RD DC/DC Converter Memory Output L984 OR Injector Common 3 & 4
A571 PU Aux Ckt 1 L985 YL Injector Common 5 & 6
A572 PK Aux Ckt 2 T920 YL ADEM II Digital Sensor 5A
A579 OR Wiper Motor +
Component identifiers (CID¹) for
Engine Control (MID² No. 036) and
Engine/Pump Control (MID² No. 105)
CID Component
0001 Cylinder 1
0002 Cylinder 2
0003 Cylinder 3
0004 Cylinder 4
0005 Cylinder 5
0006 Cylinder 6
0091 Throttle Signal Abnormal
0096 Fuel Level Sensor
0100 Oil Pressure Signal
0110 Coolant Temperature Signal
0167 Alternator Charging Sensor
0168 Electrical System Voltage
0172 Inlet Air Temperature Signal
0174 Fuel Temperature Signal
0190 Engine RPM Signal
0253 Personality Mode
0261 Timing Calibration
0262 Analog Sensor Supply
0267 Shutdown Input Signal
0268 Programmable Parameters
0273 Boost Pressure Signal
0274 Atmospheric Pressure Signal
0286 Oil Lamp
0374 Swing Brake Solenoid
0376 Travel Alarm
0581 Proportional Reducing Valve
0582 Air Filter/Engine Oil Pressure
0583 Boom Raise Solenoid
0586 Invalid Engine Speed
0587 Calibration Data Error/Governor Actuator Signal
0588 Monitor Communications
0597 PWM Sensor
0598 Travel Speed Solenoid
0600 Hydraulic Oil Temperature Signal
0688 VHP Solenoid
0763 Controller Communications
¹ The CID is a diagnostic code that indicates which component is faulty.
² The MID is a diagnostic code that indicates which electronic control module
diagnosed the fault.
Code Description of Problems
b101 Cylinder 1 open circuit.
b102 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 pressure open/short to + battery.
b10F Oil pressure short to ground.
b110 Oil pressure calibration required.
b111 Coolant temperature open/short to + battery.
b112 Coolant temperature 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 + battery.
b117 Analog sensor supply short to ground.
b118 Digital sensor supply short to + battery.
b119 Digital sensor supply short to ground.
b11A Shutdown inputs are incorrect.
b11b Turbo out pressure open/short to + battery.
b11C Turbo out pressure short to ground.
b11d Turbo out pressure calibration required.
b11E Atmospheric pressure open/short to + battery.
b11F Atmospheric pressure short to ground.
b120 Atmospheric pressure calibration.
b121 Check programmable parameters.
b122 Timing calibration required.
b123 Hydraulic oil temperature open/short to + battery.
b124 Hydraulic oil temperature signal short to ground.
b200 ADEM unknown error.
Engine Control Real Time Error Codes
Failure Mode Identifiers (FMI)¹
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.
14 Parameter failures.
15 Parameter failures.
16 Parameter not available.
17 Module not responding.
18 Sensor supply fault.
19 Condition not met.
20 Parameter failures.
¹The FMI is a diagnostic code that indicates what type of failure has occurred.
Code Description of Problems
1301 Engine oil pressure is too low.
1302 Engine coolant temperature is too high.
1303 Hydraulic oil temperature is too high.
1304 Air filter is clogged.
1305 Battery voltage is not normal.
2201 Governor actuator feedback sensor circuit is open or shorted to battery voltage.
2202 Governor actuator feedback sensor circuit is shorted to body ground.
2301 Governor actuator feedback signal is not stable.
2302 Governor actuator feedback signal deviates.
2303 Governor actuator does not move.
2304 Calibration data error.
3201 Monitor RAM is not normal.
4101 Electric power supply to the controller is too much (43 volts).
4102 Over-current in proportional reducing valve.
4103 Proportional reducing valve circuit is open.
4104 Monitor power supply (digital output) over current.
4105 Over-current in digital output (trenching solenoid).
4106 Over-current in digital output (fine control solenoid).
4107 Over-current in digital output (travel speed change solenoid).
4108 Over-current in digital output (travel alarm).
4109 Spare solenoid 1 (digital output) over current.
410A Over-current in digital output (swing brake solenoid).
410b Spare solenoid 2 (digital output) over current.
4201 Engine speed is not normal.
4202 Engine coolant temperature sensor is shorted to body ground.
4203 Hydraulic oil temperature sensor is shorted to body ground.
4204 PWM sensor of pump delivery pressure is shorted to body ground.
4205 Spare PWM sensor 1 is shorted to body ground.
4206 Spare PWM sensor 2 is shorted to body ground.
4207 PWM sensor of pump delivery pressure is open in circuit.
420A Fuel sensor is shorted to body ground
420B Fuel sensor is open or shorted to battery voltage.
420C Electric power supply is to low (below 23 volts).
420D Electric power supply is to high (above 32 volts).
420E Engine speed dial is not in one of the 10 specified positions.
4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal).
4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal).
4303 Engine stalls.
A201 Monitor communication is not normal.
A202 Monitor takes too much time to respond to controller's signal.
A203 Communication is abnormal in controller.
A20d ADEM communication disconnect.
Real Time Error Codes
Related Electrical Service Manuals
Title Form Number
Alternator: 3E-7577 RENR1252
Engine/Pump Control SENR1935
Electric Starting Motor: 6V-5539
Consist: 6V-5540
Consist: 6V-5582 SENR4975
Consist: 106-8554 SENR3581
(Optional Replacement) 6V-0890 SENR3860
Engine Control RENR1235
Starting and Charging RENR3761

2. RENR3762-02
30
Page,
(Dimensions:
39
inches
x
28
inches)
Components are shown installed on a fully operable machine with the key and engine off, transmission shifter
in neutral and with parking brake set.
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
SCHEMATIC PART NUMBER: 167-3625, CHANGE: 06, VERSION: HE
THIS SCHEMATIC IS FOR THE 345B SERIES II EXCAVATOR ELECTRICAL SYSTEM
MEDIA NUMBER: RENR3762-02
ABBREV
RD
WH
OR
YL
PK
BK
GY
PU
BR
GN
BU
COLOR
RED
WHITE
ORANGE
YELLOW
PINK
BLACK
GRAY
PURPLE
BROWN
GREEN
BLUE
SYMBOL DESCRIPTION
BLADE, SPADE, RING OR SCREW
TERMINAL
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ELECTRICAL CONNECTION TO
MACHINE STRUCTURE
INTERNAL ELECTRICAL CONNECTION
TO SURFACE OF COMPONENT
CONNECTOR
ATCH WIRE, CABLE, COMPONENT
SPLICE
CIRCUIT GROUPING DESIGNATION
H#
WIRE GROUP COLOR DESCRIPTIONS
GROUND CIRCUIT
WIRES THAT HAVE SYSTEM VOLTAGE WHEN THE KEY SWITCH IS OFF
WIRES THAT HAVE SYSTEM VOLTAGE WHEN THE KEY SWITCH IS ON
STARTING CIRCUIT
START AID CIRCUIT
MONITOR CIRCUIT
GUAGE CIRCUIT
ENGINE CONTROL CIRCUIT
HEATER AND AIR CONDITIONER CIRCUIT
TURN SIGNAL / WIPER WASHER CIRCUIT
ENGINE AND PUMP CONTROL CIRCUIT
OTHER COLOR DESCRIPTIONS
HIGHWAYS
L8
L18
L3
L19
L20
L21
C537-GN-18
C537-GN-18
H
B
B
147-PU-18
K904-GN-18
430-BU-18
K906-GN-18
A771-PU-18
763-BU-18
200-BK
112-PU-4
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
154-RD-18
118-GY
129-BU
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
439-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-4
112-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
J704-WH-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
J704-WH-18
115-PK-14
151-GN-18
200-BK-18
200-BK-18
615-YL
615-YL
607-PK
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
607-PK
200-BK-18
151-GN-18
A588-GN-18
J704-WH-18
320-OR-18
786-GN-18
149-PU
616-BU
114-RD
322-GY
308-YL-18
308-YL-18
A770-PK-18
K909-BU-18
615-YL
607-PK
791-PK-18
115-PK-18
115-PK-18
151-GN-18
200-BK-18
A588-GN-18
J704-WH-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
189-RD
114-RD
140-BU
200-BK-18
200-BK-18
200-BK-14
147-PU-18
200-BK-18
200-BK-14
200-BK-14
H
G
I
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
E
D
C
B
2
1
A
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
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
200-BK-18
8
9
4
J
C468-BU-18
200-BK-18
A
A
A
TRAVEL ALARM
3E-7738
E794-YL-18
2
B
COOLANT
LEVEL SW
096-0744
1
2
MOTOR
UPPER WASHER
7T-8890
LOWER WASHER
7T-8890
BATTERY
3T-5760
POS NEG
NEG
POS
ATCH
BATTERY
3T-5760
(NOTE C)
320-OR-18
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
200-BK
A770-PK-18
4
3
2
1
5
6
311-WH-18
151-GN-18
A762-PU-18
788-YL-18
200-BK-18
311-WH-18
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 NEG
POS
K997-BU-18
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUND
BK-18
BR-18
YL-18
B
C
B
200-BK-18
BUS
BAR
C468-BU-18
177-RD-4
112-PU-4
A
M
N
M
N (NOTE D)
M
N (NOTE D)
F
H
G
I
E
D
C
B
A
F
F
M
N
F
B
B
200-BK-14
F717-YL-18
B
B
2
1
2
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
200-BK-18
200-BK-18
403-GN
2
C
9 8 7
C B
6 5 4
B
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
ENG SPEED
PICKUP
6V-2455
ATCH
START AID
COOLANT TEMP SW
3E-6449
E
C
304-WH-8
C
1
2
386-PK-18
2
616-BU
322-GY
607-PK
615-YL
1 ENG OIL
LEVEL SW
111-4759
101-RD-4
DISCONNECT SW.
7N-0719
ALTERNATOR
3E-7577
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
L29
L30
MAIN RELAY
165-4026
CAB/CHASSIS LAMP RELAY
111-4871
578-BU-18
4
5
80A
200-BK-18
200-BK-18 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
161-9930
B
SENSOR
ATM PRESSURE
161-9925
SENSOR
BOOST PRESSURE
161-9927
CHASSIS
L30
SENSOR
SPEED/TIMING
129-6628
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-18 306-GN-18
304-WH-8
DECEL
ACCEL
ATCH CTWT
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
K997-BU-18
L977-YL-18
L974-GN-18
L978-GY-18
ENG/PUMP CONT
177-7644
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)
SS
177-RD-14
177-RD-14
AG
AF
147-PU-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
ENGINE
26
27
28
30
B
2
1
177-RD-14
1
4
3
2
177-RD-14
177-RD-14
177-RD-14
177-RD-14
306-GN-18
MOTOR
31
H
177-RD-14
200-BK-18
L28 L28
308-YL-18
ZZ
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
6V-5539
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
143-8037
RD-00
200-BK-18
RD-00
RD-00
177-RD-14
ATCH
SUCTION LINE
SHUTOFF LIMIT SW
3E-5181 HYD OIL
FILTER SW
143-8037
GROUND
SIGNAL
+B
200-BK-18
113-OR-18
E455-BR-18
177-RD-14
B
B
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
YY
HYD OIL
TEMP SENDER
4I-5394
FUEL LEVEL
SENSOR
105-9911
4
1 2
3
1
2
1
HYD TANK
PRESS SW
148-8893
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
VV
AD
AD
UU
111-RD-14
101-RD-4
101-RD-4
147-PU-18
177-RD-4
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
K912-GN-18
K911-PK-18
403-GN-18
185-YL-18
200-BK-14
615-YL-18
K911-PK-18
K912-GN-18
149-PU
200-BK-14
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
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
506-PU-18
112-PU-14
112-PU-14
180-GN
108-BU
189-RD-14
590-GY-18
501-GN-18
A586-OR-18
SENSOR COM
ENG CONT
115-3055
103-RD-18
8
103-RD-18
508-PU-18
509-WH-18
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
NN
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
C
C
112-PU-4
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
5
9
10A
10A
15A
10A
10A
10A
A A
15A
7
8
1
6
5
4
3
2
PLATFORM
CHASSIS
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
AUX CKT
ATCH LUBRICATOR
6
8
1
7
4
5
3
2
J
J
J
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
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
112-PU-4
133-OR-14
152-BU
A499-BU-18
200-BK-18
200-BK-18
200-BK-18
L52
200-BK-18
200-BK-18
200-BK-18
L52
177-RD-8
3
152-BU
439-YL-18
L972-BU-18
615-YL
A755-PK-18
L968-OR-18
763-BU-18
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.
NOTE A : NORMALLY OPEN REFRIGERANT CHANGE.
NOTE D : USE WITH FALLING OBJECT GUARD.
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
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
200-BK
200-BK
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
322-GY
114-RD
322-GY
114-RD
322-GY
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
FACTORY
ADJ CONN
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
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-18
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)
DIGITAL OUT (-1)
TRAVEL SW
HYD OIL FILTER INDICATOR
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 SW
37
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
156-9426
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
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
B
B
C538-OR-18
C537-GN-18
A
A
L15
L50
L45
RELAY PANEL
115-PK-14
114-RD-18
114-RD-18
D
D
D
A
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
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
200-BK-18
200-BK-18
200-BK
200-BK
A579-OR
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-BK-18
321-BR-18
200-BK-18
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.
THIS SCHEMATIC IS FOR THE 345B SERIES II HYD EXCAVATOR
UNLESS OTHERWISE SPECIFIED, ALL WIRE IS 16 GAUGE.
200-BK-18
HH
GG
FF
EE
DD
CC
BB
AA
CABLE AS.
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
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
4
200-BK-18
A513-RD-18
615-YL
CONVERTER
134-1346 (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
L14
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
322-GY
607-PK
607-PK
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
A
A
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
L20
L21
L52
L970-GY-18
12 VDC RADIO
3E-7140
(NOTE F)
NOTE F : HORIZONTAL MTG LOCATION FOR CASSETTE
L8
L18
L14
L3
L19
L15
L8
L18
L20
306-GN-18
L20
200-BK-18
200-BK-18
L8
200-BK-18
L8
616-BU
123-WH
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
200-BK-18
961-GN-18
L15
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
VV
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
114-RD
200-BK-18
189-RD
154-RD-18
150-RD-18
607-PK
K907-BU-18
111-RD-14
K905-RD-14
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
XX
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L22
L21
L18
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
H
H
L33
L33
L33
L33
K915-GN-18
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
L2
L1
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.
WIRES E793-BU & E794-YL TO BE TWISTED AROUND
EACH OTHER AT LEAST 1 TURN PER 25 mm.
WIRES 892-BR & 893-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
F717-YL-18
F718-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
508-PU-18
509-WH-18
511-BR-18
A513-RD-18
512-GN-18
592-BU-18
200-BK-18
114-RD
185-YL-18
112-PU-14
L5
151-GN-18
L20
L3
L19
L21
L22
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
H
H
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
B
A
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
546-BU-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
E794-BU-18
152-BU
1
B
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
D
B
322-GY
L51
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
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
147-7982
A572-PK
A571-PU
180-GN
615-YL
607-PK
200-BK
CHASSIS
LAMP
HORN
616-BU
200-BK
616-BU
200-BK
7T-0970
HORN
7T-0969
153-2523
322-GY
200-BK 200-BK
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
H
H
J704-WH-18
200-BK
548-GY-18
J704-WH-18
101-RD-4
308-Yl-18
GND
L10
200-BK-18
200-BK-18
J
J
J
615-YL
103-RD-18
120-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
A PLATFORM
A
+
+1
-
MOTOR
N
167-3479
132-1845
206-5016
145-0176
150-6967
150-6966
167-3477
128-8912
132-1857
128-8886
116-0242
116-0080
128-8898
132-1805
125-4727
116-0080
128-8884
125-4848
141-9160
141-9161
128-7337
128-7336
141-2135
143-3676
176-1397
176-3962
111-4829
128-8938
141-8659
130-2211
129-8144
I-8
A-7
A-9
F-8
F-8
G-7
C-7 (N0TE H)
E-7
A-9
H-8
H-8
A-8
I-8
I-8
I-8
A-8
B-2
H-3
D-3
G-1
E-1
F-8
A-9
A-3
G-7
F-8
F-8
C-2
G-1
G-1
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
590-GY-18
BR
GY
BK
592-BU-18
200-BK-18
L24
12 VDC RADIO
OPERATOR STATION
103-8525
REMOVAL TOOL
7Y-5493
179-RD
322-GY
168-RD
150-RD-18
114-RD
133-OR-14
K912-GN-18
K997-BU-18
K911-PK-18
SUN LOAD
SENSOR
128-2162
MONITOR
RS485+
MAIN
+B
RS485-
LIGHT
151-9385
A
B
C
D
E
F
G
H
J
616-BU
A
C538-OR-18
201-BK-18
F400-GY-18
200-BK-18
200-BK-14
200-BK
C
B
A
OR
GN
103-RD-18
RH SPKR (-)
CONV (MEM)
CONV (OUT)
GND
C537-GN-18
5
4
3
2
R
H
S
B
C
ON
ST
OFF
1
S4
S3
S2
S1
COM
6
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
J704-WH-18
J704-WH-18
L972-BU-18
590-GY-18 W. INT
W. LOW
SWITCH PANEL
128-8909
KEY SW
9G-7641
WASH
ONE TOUCH
LOW IDLE SW
128-2134
HYD TK IND
L. BOOM
L. CHASSIS
B+
GND
501-GN-19
A586-OR-18
439-YL-18
786-GN-18
791-PK-18
113-OR-18
200-BK-18
200-BK-18
A513-RD-18
592-BU-18
177-RD-14
+B
COMP
GND
SUN+
SUN-
5
320-OR-18
546-BU-18
J704-WH-18
547-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
308-YL-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
LIGHTER
9W-0335
WIPER/WASHER
CONTROLLER
127-9838
SERVICE
METER
6T-7337
L970-GY-18
L970-GY-18
LAMP
126-7487
200-BK
615-YL 615-YL
200-BK
615-YL
615-YL
615-YL
615-YL
CONV
(MEM)
308-YL-18
200-BK-14
200-BK-18
200-BK
200-BK-18
CAB
129-BU
L6
E
E
E
E
E
+ -
E
CAB
E
L7
403-GN-18
OPERATOR STATION
OPTION SW
108-BU
1
NOTE G : NOT USED WITH FINE SWING CONTROL
114-RD
140-BU
322-GY
607-PK
200-BK
200-BK-18
6
113-OR-18
113-OR-18
129-BU
607-PK
322-GY 607-PK
607-PK
607-PK
322-GY
3
200-BK-18
103-RD-18
118-GY
A579-OR
A579-OR
108-BU
6
2
123-WH-14
200-BK
176-YL
607-PK
150-RD-18
607-PK
154-RD-18
200-BK
A588-GN-18
L7
L6
A
A
152-BU
576-PK
C
ATCH FAN
AE
L8
B
200-BK-14
200-BK-14
AC
AC
K
K
AC
B
K
B
ALL DASHED LINES ARE ATTACHMENTS.
ENGINE/PUMP CONTROL CIRCUIT.
108-BU
120-YL
L15
L15
ATCH
BOOM LAMP
153-2521
ATCH
BOOM LAMP
153-2521
L7
L6
LOWER
WIPER MOTOR
MOTOR
131-0398
HYD
LOCK SOL
121-1491
NEUTRAL START
LIMIT SW
111-4799
HORN SW
128-2134
2
1
B
C
2
THROTTLE
POS SW
106-0107
GND
CONN 7
CONN
8
CONN
9
CONN
10
CONN 11
CONN
12
CONN 13
CONN 14
CONN 15
CONN 16
CONN 17
CONN
18
CONN
20
CONN
21
CONN 19
CONN 22
CONN
34
CONN 33
CONN 32
CONN 26
CONN 25
CONN 24
CONN
23
CONN 27 CONN 28 CONN 29 CONN 30 CONN 31
CONN
39
3
4
5
6
2
1
8
7
CONN
38
CONN 40
167-3625 00
499-GY-18
1
3
4
2
E98098
CONN
2
CONN
3
CONN
4
CONN
5
CONN
6
SENSOR
FUEL PRESSURE
161-9930
AG
AF
8
7
6
5
4
3
2
1
FAN SPEED
CONTROL SOL
AG
2
E799-BR
F700-BU
F701-BR
SP RE
SPARE
SPARE
SPARE
SPARE
SPARE
SOLENOID COMMON
FAN CONT SOL
T920-YL
F714-PK
1
F704-OR
F702-GN
AF
F701-BR
T920-YL
F714-PK
F704-OR
F702-GN
F713-0R
E799-BR
F700-BU F713-OR
E799-BR
F700-BU
19
26
32
7
13
2
24
31
W
H
BK
BK
BK
OR
OR
OR
OR
OR
OR
GN
GN
GN
YL
YL
YL
W
H
W
H
W
H
BK
OR
A701- GY
A706-
GY
A706- GY
A701-
GY
A702-
PU
A702- PU
A703-
BR
12
A703- BR
A704-
GN
A704- GN
11
9
A705- BU
7
A705-
BU
1
2
3
4
5
6
8
10
+5V
SENSOR COM
M
ON
FUEL TEM
P
INLET AI R TEM
P
COOLANT TEM
P
ENG OIL PRESSURE
ATM PRESSURE
INLET MANF PRESSURE
FUEL PRESSURE
ENG SP/ TM
G
ENG SP/ TM
G COM
M
ON
ENG SP/ TM
G
ENG SP/ TM
G COM
M
ON
+V ENG SP/ TM
G
INLE
T M
ANF PRESSURE
ATM PRESSURE
ENG OIL PRESSURE
COOLANT TEM
P
INLET AIR TEM
P
+5V
SENSOR COM
M
ON
SENSOR COM
M
ON
+5V
+5V
SENSOR COM
M
ON
SENSOR COM
M
ON
+5V
+5V
SENSOR COM
M
ON
FUEL TEM
P
SENSOR COM
M
ON
+5V
C
B
A
A
B
C
C
B
A
INJECTOR 1
INJECTOR 2
INJECTOR 3
INJECTOR 4
INJECTOR 5
INJECTOR
SOL 6
INJECTOR
SOL 5
INJECTOR
SOL 4
INJECTOR
SOL 3
INJECTOR
SOL 2
1
29
1
14
2
23
20
8
15
9
3
30
36
2
1
1
2
2
1
INJECTOR COM 5&6
INJECTOR COM 1&2
INJECTOR COM 3&4
INJECTOR 6
INJECTOR
SOL 1
5
17
27
6
12
18
22
28
34
1
2
2
1
11
37
38
35
33
25
21
40
16
39
10
4
L984-
OR
L984- OR
L983-
W
H
L983-
W
H
+V ENG SP/ TM
G
+V ENG SP/ TM
G
F732- PK
F732- PK
999- W
H
999- W
H
N944- PU
N944- PU
N944- PU
996- GN
996- GN
996- GN
A745- W
H
A745- W
H
A746- PK
A746- PK
A747- GY
A747- GY
994- GY
994- GY
995- BU
995- BU
C967- BU
C967- BU
A751- YL A751- YL
N941- YL
N941- YL
N941- YL
N941- YL
N941- YL
N941- YL
N941- YL
N941- YL
N940- BU
N940- BU
N940- BU
N940- BU
N940- BU
N940- BU
N940- BU
L983- W
H
2 A
B
C
C
B
A
L985-
YL
L985-
YL
L984-
OR
C
B
A
A
B
C
SENSOR COM
M
ON
+5V
FUEL PRESSURE
+V ENG SP/ TM
G
ENG SP/ TM
G COM
M
ON
ENG SP/ TM
G
ATCH SENSOR
BACKUP SPEED/ TIMING
A
N940- BU
B
C
OR
BK
W
H
YL
GN
OR
A
B
C
L985- YL
AF
AF
AF
AF
AF
AF
AF
DD
DD
DD
DD
DD
DD
DD
AF
CONN 1