312C EXCAVATOR ELECTRICAL SCHEMATIC

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.
CID Com
p
onent
1522 Variable Relief (1) Solenoid Valve
1523 Variable Relief (2) Solenoid Valve
1524 Flow Control Solenoid Valve
2004 ATT Stem1 Modulation
2005 ATT Stem2 Modulation
2006 ATT Stem3 Modulation
2012 1Way/2Way Change Solenoid Valve
2016 ATT Stem1 Extended Solenoid Valve
2017 ATT Stem1 Extended Solenoid Valve
2018 ATT Stem2 Extended Solenoid Valve
2019 ATT Stem2 Extended Solenoid Valve
2020 ATT Stem3 Extended Solenoid Valve
2021 ATT Stem3 Extended Solenoid Valv
e
CID Com
p
onent
96 Fuel Level Sensor
110 Engine Coolant Temperature Sensor
167 Alternator
168 Voltage of the Power Supply (Key Switch)
190 Speed Sensor
248 Cat Data Link
374 Swing Brake Solenoid
376 Travel Alarm
581 Proportional Reducing Valve for the Power Shift Pressure
586 Engine Speed Dial
587 Feedback Sensor for the Governor Actuator
598 Travel Speed Solenoid
600 Hydraulic Oil Temperature Sensor
1161 Pump Delivery Pressure Sensor (1)
1162 Pump Delivery Pressure Sensor (2)
1525 Straight Travel Solenoid
2002 Action Alarm
Component Identifiers (CID¹)
Module Identifier (MID²)
(Atch.) Valve Control
(MID No. 06A)
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.
Engine and Pump Controller
(MID No. 069)
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
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
101 RD
Battery +
C538 OR
A/C Photo Sensor -Signal
103 RD
Monitor
E554 PK
A/C Controller To A/C Compressor Clutch
105 RD
Key Switch
C569 YL
Second DC/DC Converter Power Output
109 RD
Alternator B+
C578 YL
Radio Switch
110 RD
Timer Relay B+
A579 OR
Wiper Motor +
112 PU
Main Power Relay Output
A580 BR
Wiper Motor -
113 OR
Panel B+
A584 BU
Front Window Limit Switch To Wiper control
114 RD
Forward Horn
A586 OR
Wiper Switch To Wiper Control
115 RD
Cab Lamp
C587 OR
Blade Switch
118 GY
Wiper/Washer
A588 GN
Safety Solenoid Relay To Solenoid
120 YL
12V 7A Converter 1
C588 BR
Blade Switch
123 WH
Seat Heater
C589 GY
Blade Solenoid
124 GN
A/C
590 GY
Wiper Switch To Intermediate Module
129 BU
Cigar Lighter
C591 PK
Float Solenoid
135 BU
Switched Converter Output
C599 YL
Second DC/DC Converter Power Output
139 OR
Radio
140 BU
Fuel Pump
607 PK
Flood Lamp - Front
143 BR
Alternator Regulator
615 YL
Cab Flood Lights
147 PU
Beacon and Heated Seat
616 BU
Boom Flood Lights
149 RD
Boom Lamp
A623 BU
Right Cab Flood Lamp Switch to Relay
151 GN
Neutral Start Limit Switch
638 WH
Beacon
152 BU Lower Wiper/Washer 645 RD
Boom Lam Relay
154 RD Neutral Start Limit Switch 646 RD
Delay Timer Lamp Switch ATCH
160 PU
Chassis Lamp
168 RD
Refueling Lamp
M734 BR
Travel Mode Switch
169 PK
Backup/Monitor Control
M736 BU
Governor Command
175 RD
A/C Blower
M737 WH
Front Flow control Valve Solenoid
176 RD
Aux. Circuit
M738 OR
Primary NFC Pressure Solenoid
180 GN
Aux. Circuit
M739 YL
Solenoid Return 2
184 RD
Engine Pump Control
M741 GY
Travel Alarm Cancel
189 RD
Engine Governor Actuator
M742 PU
AEC Model Switch
A755 PK
Throttle Switch #1
200 BK
Main Chassis
A756 BU
Throttle Switch #2
201 BK
Operator Monitor Return
A757 GY
Throttle Switch #3
210 BK
Converter Output (24/12V)
A758 BR
Throttle Switch #4
211 BK
Converter 12V 7A
A761 PU
Electronic Pump Control Throttle Ground
235 BK
Engine Pump Control Ground
A762 PU
Electronic Pump Control Engine Speed Ground
763 BU
Travel Speed Change Solenoid
304 WH Start Relay Output
A768 BU
Pump Control Valve #1 +
306 GN Start Relay To Start Relay Diode
A769 GY
Pump Control Valve #2 -
307 OR Key Switch To Neutral Start Relay
A770 PK
Electronic Pump Control Bypass Switch To Resistor
308 YL
Main Power Relay Coil
F773 OR
Governor Acceleration
310 PU
Start Aid Switch To Start Aid Solenoid
F774 WH
Governor Deceleration
311 WH
Start Aid Solenoid
K777 GY
Implement Pressure Switch
315 GN
Air Heater
779 WH
Quick Coupler
317 YL
Air Heater Relay
K779 PU
Alternator Diode
320 RD
Horn Relay To Horn Switch
780 PU
Coupler Disengage Solenoid
321 BR
Backup Alarm Lamp Travel Alarm
788 YL
Engine Speed +
322 GY
Forward Horn
892 BR
Cat Data Link +
323 WH
Fuel Pump Power
893 GN
Cat Data Link -
325 PK
Fuel Pump Relay Cut-out
K843 GN
Stem 3 Extend Switch
326 RD
Key Switch to Engine Shutdown Solenoid
K844 GY
Stem 4 Extend Switch
334 BU
Air Heater Resistor
K847 PU
Stem 3 Retract Switch
365 YL
Fuel Pump Relay to Switch
K848 WH
Stem 4 Retract Switch
399 OR
Coolant Temperature Switch
K849 YL
ATT Stem 1
K850 BR
Joystick
403 GN Alternator (R) Term
K851 BU
ATT Stem 3
405 GY Operator Monitor Oil Pressure (Low Set)
K852 GN
ATT Stem 4
410 WH Operator Monitor Fault Alarm
K856 PU
Stem 1 Extend Solenoid
412 BU C107Operator Monitor Coolant Flow
K857 WH
Stem 2 Extend Solenoid
H415 BR
Overload Warning Pressure
K858 YL
Stem 3 Control Valve A
430 BU
Operator Monitor Air Filter
K860 BU
Stem 1 Retract Solenoid
F443 GN
Overload Warning Pressure
K861 GN
Stem 2 Retract Solenoid
F444 PU
Overload Warning Pressure
K862 GY
Stem 3 Control Valve B
H455 OR
Buzzer
K864 PK
Relief 1 Solenoid
H465 GN
Travel Alarm Cancel Indicator
K866 WH
Relief Check 2 Solenoid
H466 BU
AEC Mode Indicator
K868 BR
Stem 1 Retract Solenoid
H467 WH
Travel Mode indicator 1
K869 BU
Stem 3 Extend Solenoid
C468 BU
Engine Oil Level
K870 GN
Relief Solenoid
E472 GN
ATT 12V Sensor Supply
K871 WH
Pump Exchange Solenoid
E473 GY
Stem 1 Modulation
K872 OR
Single/Double Action Exchange Solenoid
E474 OR
Stem 2 Modulation
K874 BR
Relief Check 1 Solenoid
H476 WH
Joystick Pressure Switch
K876 BR
Variable Relief 3 Solenoid
487 OR
Hyd. Oil Filter Switch
K879 GN
Double Action Solenoid
491 PK
Hydraulic Oil Temperature
K904 GN
Pump Discharge - Signal
492 GY
Coolant Temperature Sensor Signal
K906 GN
Swing Brake Solenoid - Signal
495 GN
Fuel Level Signal
M906 BU
Squeeze Pressure Sensor
496 WH
Operator Monitor Panel Hydraulic Oil Level
K907 BU
Swing Brake Solenoid - +Battery
955 BU Hammer Solenoid
501 GN
Wiper - Front (Low)
M962 YL Rotate CCW Relay
502 BU
SW Cab/Aux. Lines
T967 YL Pump Discharge Mean Pressure
506 PU
Washer - Front
L968 OR Engine Pump Control PS Valve -
508 PU
Radio Speaker - Left
L969 WH Engine Pump Control PS Valve +
509 WH
Radio Speaker - Left (common)
L971 GN Travel Pressure Switch
511 BR Radio Speaker - Right L972 BU Low Idle Switch
512 GN Radio Speaker - Right (Common) G976 BU Water Separator Sensor
530 OR Washer - Right L976 GN Excavator Fuel Pump Switch
A537 PK Seat Heater C987 RD +Battery
C537 GN A/C Photo Sensor +Signal
Wire Description
Accessory Circuits
Monitor Circuits
Power Circuits
Accessory Circuits (Continued)
Lighting Circuits
Control Circuits
Ground Circuits
Basic Machine Circuits
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Machine
Actuator - Engine Governor A-7
F
Solenoid - A/C Clutch B-12
19
Air Heater C-11
2
Solenoid - Cold Advance B-12 22
Alarm - Action D-2
A
Solenoid - Double Action C-7
33
Alarm - Travel E-12
3
Solenoid - Flow Limit Pressure A-8
30
Alternator B-11
4
Solenoid - Hammer A-5
40
Antenna F-6
5
Solenoid - High Pressure Quick Coupler (1) C-3 56
Battery J-12
6
Solenoid - High Pressure Quick Coupler (2) C-3 56
Beacon D-6 Solenoid - Hydraulic Lock A-8
F
Block - Terminal G-9
E
Solenoid - Low Pressure Quick Coupler C-3 56
Breaker - Alternator G-10
E
Solenoid - Power Shift Control A-7
F
Buzzer F-2 A Solenoid - Relief 1 C-4 F
Control - Blade J-8
E
Solenoid - Relief Check 2 B-4 F
Control - Engine/Pump F-9
E
Solenoid - Relief Check1 C-4 F
Control - Valve D-9
E
Solenoid - Separate Valve A-6
F
Converter F-6
27
Solenoid - Single Action 1 C-7
34
Fuse Block H-11
E
Solenoid - Single Action 2 C-7
35
Horn - Forward Warning (High) C-2
7
Solenoid - Start Aid H-12 E
Horn - Forward Warning (Lo) C- 2
7
Solenoid - Stem 1 Extend A-9 D
Joystick - Atch (Console LH) J-2 C Solenoid - Stem 1 Retract A-9 D
Joystick - Atch (Console RH) G-1 B Solenoid - Stem 2 Extend A-4 D
Joystick (LH) H-6
A
Solenoid - Stem 2 Retract A-4 D
Joystick (RH) H-6
A
Solenoid - Stem 3 Extend A-4 D
Lamp - Boom (LH) C-2
8
Solenoid - Stem 3 Retract A-4 D
Lamp - Cab F-1
9
Solenoid - Swing Brake Cancel A-8
F
Lamp - Chassis B-2
10
Solenoid - Travel Speed Change A-8
F
Lamp - Dome E-6
A
Solenoid - Valve GP For VAB/Aux Lines J-1 A
Lighter - Cigar D-1
A
Speaker - (LH) E-6
A
Meter - Service D-1
A
Speaker - (RH) F-6 A
Motor - Refueling Pump A-2
42
Switch - A/C Panel D-3 A
Motor - Starter A-11
12
Switch - Air Cleaner H-12
23
Motor - Washer J-12
13
Switch - Aux. Hydraulic Pressure J-1
D
Motor - Wiper E-1
A
Switch - Backup G-2
B
Pump - Fuel C-12 F Switch - Beacon D-6 A
Relay - Air Heater H-11 E Switch - Blade Pressure D-4
D
Relay - Beacon G-11 E Switch - Coolant Level J-12
E
Relay - Boom Lamp J-11
E
Switch - Coolant Temperature C-12 22
Relay - Cab Lamp J-11
E
Switch - Disconnect G-11
E
Relay - Chassis Lamp J-11
E
Switch - Engine Oil Level A-12
21
Relay - Hammer Cont. H-7
E
Switch - Engine Oil Pressure B-12
22
Relay - Horn H-11
E
Switch - Hammer J-1
48
Relay - Hydraulic Lock Solenoid H-11 E Switch - Hammer Pressure (2) A-5
41
Relay - Main J-7 E Switch - Heater Panel D-3 A
Relay - Neutral Start H-11 E Switch - Horn J-2
C
Relay - Refueling 1 A-3 43 Switch - Hydraulic Oil Filter A-6
F
Relay - Refueling 2 A-3 44 Switch - Hydraulic Oil Level A-5
F
Relay - Start H-7
E
Switch - Implement Pressure D-12
25
Relay - Timer J-10
E
Switch - Joystick Pressure J-3
D
Resistor - Air Heater J-8
E
Switch - Key G-2 A
Resistor - Backup J-7
E
Switch - Lines/VAB D-6
D
Seat - Heated H-11
14
Switch - Medium Line Pressure J-1
39
Seat - Suspended H-1 A Switch - Neutral Start Limit J-2
D
Sender - Engine Coolant Temperature B-11
15
Switch - One Touch Low Idle G-1
B
Sender - Hydraulic Oil Temperature A-6
1F
Switch - Overload Warning D-4 A
Sensor - A/C Heater Photo E-1
A
Switch - Refueling Level A-5
47
Sensor - Engine Speed Pickup A-12
18
Switch - Refueling Start (NO) A-3 45
Sensor - Fuel Level A-5
17
Switch - Refueling Stop (NC) A-3 46
Sensor - Pump Discharge Press 1 A-7
F
Switch - Rotary F-2 A
Sensor - Pump Discharge Press 2 A-7
F
Switch - Seat Heater D-4 A
Sensor - Squeeze Press C-4 F Switch - Speed Change G-2 B
Sensor - Water Separator Level H-12
36
Switch - Travel Pressure D-12 24
Socket - 12V 7A D-6
A
Switch Panel D-3
A
Socket - 12V 7A D-6
28
Unit - Air Conditioner G-3 1
Solenoid - 1 Pump - 2 Pump Exchange 1 C-7
31
Unit - Heater G-3 1
Solenoid - 1 Pump - 2 Pump Exchange 2 C-7
32
Wiper Control D-2 A
Machine locations are repeated for components located close together.
A = Inside of cab.
B = Inside of right console.
C = Inside of left console.
D = Backside of platform.
E = Around relay panel.
F = Inside of hydraulic pump.
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 Product Link F-12 E
CONN 2 F-11 F
CONN 3 F-11 E
CONN 4 F-10 E
CONN 5 F-10 E
CONN 6 F-10 E
CONN 7 G-9 E
CONN 8 G-9 E
CONN 9 G-8 E
CONN 10 G-8 E
CONN 11 G-8 E
CONN 12 B-8 F
CONN 13 E-7 49
CONN 14 G-7 A
CONN 15 G-7 E
CONN 16 G-7 A
CONN 17 D-6 A
CONN 18 F-5 E
CONN 19 F-5 A
CONN 20 F-4 A
CONN 21 H-3 38
CONN 22 C-3 37
CONN 23 B-3 29
CONN 24 A-3 20
CONN 25 A-3 16
CONN 26 C-2 A
CONN 27 F-2 A
CONN 28 F-2 A
CONN 29 G-2 B
CONN 30 H-2 11
CONN 31 H-2 D
CONN 32 H-2 D
CONN 33 J-2 50
CONN 34 J-2 D
CONN 35 B-2 26
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.
Related Electrical Service Manuals
Form Number
Alternator: 109-2362
SENR3685
Electric Starting Motor: 109-2361
SENR3550
Engine/Pump Control: 157-3165
RENR3814
Valve Tool Control: 157-3200
RENR3823
Title
D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
21
22
23
24 25
27
28
30
31
32
33
34
35
36
39
40
41
42
43
44
45
46
47
48
49
50
38
37
29
20
16
26
Machine Harness Connector And Component Locations
A
B
C
E
F
1
2
3
4
5
6
7
7
8
8
9
9
10
11
12
13
14
15
17
18
19
21
22
23
24
25
27
28
30
31
32
33
34
35
36
39
40
41
42
43
44
45
46
47
48
49
50
38
37
29
20
16
26
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
4I-5394 Sender: Hydraulic Oil Temperature
20824-25451 @ 0 °C (32 °F)
6134-7496 @ 25 °C (77 °F)
3989-4875 @ 35 °C (95 °F)
2224-2718 @ 50 °C (122 °F)
973-1189 @ 75 °C (167 °F)
475-522 @ 100 °C (212 °F)
221-269 @ 125 °C (257 °F)
7W-1251 Resistor: Air Heater 1
035-8059 Resistor: Air Heater 1
102-8016 Resistor: Backup 47 ± 2.35
111-9916 Solenoid:
Power Shift Control
Stem 1 Retract
Stem 2 Extend
Stem 3 Extend
Stem 3 Retract
11.7 ± 1.2
112-4009 Sender: Coolant Temperature
20824-25451 @ 0 °C (32 °F)
6134-7496 @ 25 °C (77 °F)
3989-4875 @ 35 °C (95 °F)
2224-2718 @ 50 °C (122 °F)
973-1189 @ 75 °C (167 °F)
475-522 @ 100 °C (212 °F)
221-269 @ 125 °C (257 °F)
121-1491 Solenoid:
Hydraulic Lock
Swing Brake Cancel
Travel Speed Change
1 Pump - 2 Pump Exchange 1
1 Pump - 2 Pump Exchange 2
Double Action
32 ± 3.2
152-8346 Solenoid: Quick Coupler 32.6 ± 1.6
165-9560 Solenoid:
Relief Check 1
Relief Check 2
Single Action Sol. 1
Single Action Sol. 2
20
165-9629 Solenoid: Relief 1 19.5 ±2
171-0188 Solenoid: Flow Limit Pressure 11.7 ± 1.2 @ 20 °C (68 °F)
177-2748 Solenoid: Attach Separate Valve 11.5 ± 0.5
190-7820 Solenoid:
Rotate CCW
Rotate CW
11.5 ± 0.5 @ 20 °C (68 °F)
Solenoid: Cold Advance Solenoid 6.5
Solenoid: VAB/AUX lines 48
Solenoid:
High Pressure Quick Coupler
High Pressure Quick Coupler (2)
26
Solenoid: High Pressure Quick Coupler (3) 32
¹ At room temperature unless otherwise noted.
©
2002 Caterpillar
All Rights Reserved
Printed in U.S.A.
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.
RENR5836
January 2002
312C Excavator Electrical System
BNN1-UP
CBT1-UP
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position²
3E-6425 Coolant Temperature
38° ±3°
(100.4 ± 0.5 psi)
80.6° C MIN Nomally Closed
5I-8005 Engine Oil Pressure
49 ± 9.8 kPa
(7.11 ± 1.42 psi)
29 kPa MAX
(4.21 psi MAX)
Normally Open
154-0498 Air Cleaner
635 ± 58 mm H
2
O
- Normally Open
167-3466
Medium Line Pressure
Hammer Pressure
Joystick Pressure
Medium Line Pressure
Aux. Hydraulic Pressure
Hammer Pressure 2
490 ± 49 kPa
(71.1 ± 7.1 psi)
290 kPa MIN
(42.1 psi MIN)
Normally Open
170-9335
Travel Pressure
Implement Pressure
2650 ± 200 kPa
(384.35 ± 29 psi)
2150 ± 200 kPa
(311.83 ± 29 psi)
Normally Open
170-9419 Hydraulic Oil Filter 150 ±22.5 kPa 125 ± 18.75 kPa Normally Closed
173-7633 Coolant Temperature Switch 50° C Normally Closed
¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed
condition can be maintained down to 170 kpa (25psi).
² Contact postion at the contacts of the harness connector.
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
CIRCUIT CONNECTED
SPLICE
CIRCUIT GROUPING DESIGNATION
CONN 1
CONN 2 CONN 3 CONN 4 CONN 5 CONN 6
CONN 7 CONN 8 CONN 9
CONN 10 CONN 10 CONN 14 CONN 15 CONN 16
CONN 13
CONN 12
CONN 24 CONN 25
CONN 23
CONN 35
CONN 22
CONN 26
CONN 17
CONN 18
CONN 19
CONN 20
CONN 28
CONN 27
CONN 29
CONN 21 CONN 30 CONN 31 CONN 32
CONN 34
NOTE G: USE WITH CONFIG.G'1.
TL 193-3493 G-7 (NOTE G)
TH 193-3416 G-7 (NOTE G)
TH
K849-YL-18
L32
K849-YL-18
L31
K849-YL-18
235-BK-18
200-BK-18
955-BU-18
K849-YL-18
200-BK-18
235-BK-18
235-BK-18
200-BK-18
K849-YL-18
955-BU-18
TH
200-BK-18
K871-WH
200-BK-18
K872-OR
K879-GN
200-BK-18
200-BK-18
K871-WH
200-BK-18
200-BK-18
K871-WH
K872-OR
200-BK-18
ATCH DOUBLE
ACTION SOL
121-1491
ATCH 1PUMP-2PUMP
EXCHANGE SOL 2
121-1491
ATCH SINGLE
ACTION SOL 2
165-9560
(NOTE G)
ATCH 1PUMP-2PUMP
EXCHANGE SOL 1
121-1491
ATCH SINGLE
ACTION SOL 1
165-9560
(NOTE G)
TH
TH
TH
TH
TH
200-BK-18
K872-OR
K879-GN
200-BK-18
K871-WH
K871-WH
K879-GN
K872-OR
K872-OR
200-BK-18
200-BK-18
2
3
4
1
TH
200-BK-18
K872-OR
K871-WH
200-BK-18
200-BK-18
200-BK-18
200-BK-18
VALVE GP 165-9549 (NOTE G)
955-BU-18
M962-YL-18
L31
M906-BU-18
235-BK-18
235-BK-18
C
L32
L32 L32
955-BU-18
M962-YL-18
TL
TL
ATCH HAMMER
CONT RELAY
149-5050
(NOTE G)
308-YL
6
5
1
BR-18
WH-18
BK-18
RD-18
BU-18
GY-18
4
3
2
SW
SPARE
SW
SPARE
HORN SW
SW
SPARE
GN-18
YL-18
STD
JOYSTICK (LH)
136-1206
STD
JOYSTICK (RH)
136-1206
YL-18
GN-18
BLADE
FLOATING SW
ONE TOUCH
LOW IDLE
SW
K876-BR-18
VARIABLE RELIEF 3 SOL
TL
TH
1
M962-YL-18
955-BU-18
K876-BR-18
2
L11
103-RD-18
509-WH-18
508-PU-18
512-GN-18
511-BR-18
200-BK-18
103-RD-18
F
F
ATCH SPEAKER (L) 7Y-5505
ATCH SPEAKER (R) 7Y-5505
DOME LAMP 6C-9121
2
1
4
3
5
8
6
7
F
2
1
4
3
5
8
6
7
ATCH CONVERTER 131-0327 (NOTE C)
F
GND
24V BAT IN MEM
24V SW. IN
LIGHT OUT (DC 12V)
12V MEM OUT
GND
12V SW. OUT
LIGHT IN (DC 24V)
2
1
4
3
5
8
6
7
CONVERTER 131-0327
F
GND
24V BAT IN MEM
24V SW. IN
LIGHT OUT (DC 12V)
12V MEM OUT
GND
12V SW. OUT
LIGHT IN (DC 24V)
103-RD-18
120-YL
200-BK
139-OR-18
135-BU
210-BK
103-RD-18
120-YL
512-GN-18
511-BR-18
509-WH-18
200-BK
210-BK
139-OR-18
C578-YL
C569-YL
211-BK
508-PU-18
ATCH
UPPER
RADIO
F
103-RD-18
103-RD-18
200-BK-18
C
BK
BK
311-WH-18
E554-PK-18
200-BK
AIR HEATER
035-8059
2
1
C
ENG SPEED
PICKUP
189-5746
C
C
C468-BU-18
403-GN-18
109-RD-6
200-BK-18
E554-PK-18
C
K779-PU-18
CC
C
ALTERNATOR
109-2362
ENG OIL
LEVEL SW
123-2993
2
1
2
1
235-BK-18
T
COOLANT TEMP
SENDER
112-4009
492-GY-18
405-GY-18
STARTER
MOTOR
109-2361
W
B+
D
ALT
C
C
ENG OIL
PRESS. SW
5I-8005
CA
ATCH A/C COMPR
CLUTCH SOL
176-1895
C
ENG
T
RD-00
140-BU
399-OR
C C
COLD ADVANCE
SOL
COOLANT TEMP SW
173-7633
BK-18
BK-18
C
140-BU
405-GY-18
788-YL-18
A762-PU-18
A762-PU-18
788-YL-18
304-WH-8
101-RD-6
T
ATCH COOLANT
TEMP SW
3E-6425
MOTOR
BATMTR
200-BK-18
S
G
334-BU-14
FUEL PUMP
C
200-BK
140-BU
WH-18
BK-18
235-BK-18
C
ATCH REFUELING
LEVEL SW
5C-6108
WL
WL
1
2
F444-PU-18
C
F443-GN-18F443-GN-18
F444-PU-18
E
E
112-PU-6
101-RD-6
U
U
PRESS. SW
2 3 1
WARNING PRESSURE
ATCH OVER LOAD
144-3614
K852-GN-18
H415-BR-18
200-BK-18
OVERLOAD WARNING PRESSURE
SW 144-3614
K852-GN-18
HIGH PRESSURE
ATCH QUICK COUPLER
SOL (A3)
HIGH PRESSURE
ATCH QUICK COUPLER
SOL (A2)
200-BK-18
C
1
2
780-PU-18
200-BK-18
779-WH-18
1
2
200-BK-18
C
780-PU-18
200-BK-18
779-WH-18
780-PU-18
C
200-BK-18
2
1
780-PU-18
200-BK-18
955-BU-18
ATCH
HAMMER SOL
121-6303
(NOTE G)
TH
LOW PRESSURE
ATCH QUICK COUPLER
SOL (A1)
184-RD
780-PU-18
779-WH-18
F444-PU-18
403-GN-18
F443-GN-18
200-BK
403-GN-18
F444-PU-18
F443-GN-18
779-WH-18
780-PU-18
200-BK
184-RD
403-GN-18
5
6
7
8
892-BR-18
893-GN-18
BLADE STATUS
200-BK
6
5
4
3
2
1
4
3
2
1
780-WH-18
308-YL-18
779-PU-18
F444-PU-18
892-BR-18
893-GN-18
235-BK-18
F443-GN-18
151-GN
151-GN
151-GN
+
-
C588-BR-18
A
C
B
+B
GROUND
SIGNAL
C
WASHER
176-1931
MOTOR
ATCH WATER
SEPARATOR
LEVEL SENSOR
158-8662
AIR CLEANER SW
154-0498
COOLANT
LEVEL SW
096-0744
BATTERY
3T-5760
9X-3404 (NOTE B)
POS NEGNEGPOS
C
C
CECCCA
-
154-RD
307-OR
306-GN
189-RD
A588-GN
200-BK-18
322-GY
320-RD-18
C587-OR-18
114-RD
114-RD
101-RD-6
C599-OR-18
129-BU
C589-GY-18
120-YL
123-WH
124-GN-14
154-RD
307-OR
160-PU
607-PK
646-RD-18
149-RD
616-BU
645-RD-18
892-BR-18
893-GN-18
235-BK-18
308-YL-18
BK-00RD-00RD-00
200-BK-18
235-BK-18
506-PU-18
412-BU-18
235-BK-18
147-PU
G976-BU-18
RELAY PANEL
L14
430-BU-18
235-BK-18
200-BK-18
235-BK-18
235-BK-18
200-BK
G976-BU-18
147-PU
412-BU-18
506-PU-18
+
RD-00
L19
175-RD-14
180-GN
15A
15A
10A
10A
5A
CHASSIS
LAMP RELAY
DIODE
121-1022
646-RD-18
200-BK-18
645-RD-18
110-RD
C591-PK-18
FUSE BASE
FUSE BASE
FUSE BASE
FUSE BASE
WG
FUSE
5A 141-2759
10A 113-8490
15A 113-8491
FUSE BASE
183-1000
L14
L15
235-BK-18
L13
RELAY PANEL
RELAY PANEL
WC
L15
200-BK-18
WH
ALT BREAKER
171-2208
60A
103-RD
607-PK
BK-00
184-RD
607-PK
113-OR-18
169-PK-18
C987-RD-14
168-RD-14
115-RD
149-RD
160-PU
615-YL
646-RD-18
10A
607-PK
430-BU-18
616-BU
110-RD
308-YL
189-RD
200-BK
180-GN
160-PU
129-BU
120-YL
123-WH
124-GN-14
646-RD-18
113-OR-18
169-PK-18
306-GN
151-GN
CE
147-PU
189-RD
114-RD
322-GY
AUX CKT
147-PU
101-RD-6
118-GY-14
152-BU
320-RD-18
115-RD
615-YL
893-GN-18
892-BR-18
308-YL-18
235-BK-18
118-GY-14
160-PU
5A
168-RD-14
175-RD-14
103-RD
184-RD
C987-RD-14
110-RD
105-RD
200-BK-18
149-RD
115-RD
114-RD
A623-BU-18
160-PU-18
105-RD
C
E
109-RD-6
WH
AIR HEATER
CHASSIS
ATCH SOL
5A
WJ
REFUELING PUMP
15A
10A
15A
A588-GN
10A
5A
10A
10A
5A
10A
CAB LAMP
BOOM LAMP
CHASSIS LAMP
10A
10A
BEACON LAMP
WASHER/WIPER
CIGAR LIGHTER
12V 7A CONVERTER 1
315-GN-14
10A
15A
15A
10A
15A
10A
10A
10A
SW PANEL
BACKUP/MONITOR CONT
10A
A/C
SEAT HEATER
KEY SW
TIMER RELAY
ATCH V CONT
A/C BLOWER
E/P CONT
DOME LAMP/MEMORY
HORN
10A
15A
E
E
E
DISCONNECT SW
7N-0718
E
E
E
E
NEUTRAL START RELAY
161-3128
HYD LOCK SOL RELAY
161-3128
OUT
GND
IN
+B
2
4
3
TIMER RELAY
163-6703
1
5A
SA
CAB LAMP RELAY
161-3128
HORN RELAY
161-3128
ET CONN
CHASSIS LAMP RELAY
161-3128
BOOM LAMP RELAY
161-3128
10A
BLADE SOL
FLOATING SW
BLADE SW (JOYSTICK)
FLOATING SOL
BLADE SW
GND VERIFY
GND
9
8
7
6
892-BR-18
308-YL
308-YL-18
893-GN-18
403-GN-18
308-YL-18
184-RD
200-BK
1
8
4
7
2
K852-GN-18
5
6
4
3
2
1
2
200-BK-18
780-PU-18
780-PU-18
780-PU-18
200-BK-18
200-BK-18
200-BK-18
779-WH-18
F443-GN-18
F444-PU-18
F444-PU-18
F443-GN-18
780-PU-18
C591-PK-18
779-WH-18
200-BK-18
C589-GY-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
779-WH-18
780-PU-18
F443-GN-18
F444-PU-18
F443-GN-18
F444-PU-18
780-PU-18
779-WH-18
200-BK-18
C599-OR-18
200-BK-18
200-BK-18
C588-BR-18
C587-OR-18
200-BK
180-GN
A588-GN-18
8630-BU-18
638-WH
1
AF
180-GN
A588-GN-18
8630-BU-18
638-WH
180-GN
180-GN
A588-GN-18
638-WH
200-BK-18
152-BU
8630-BU-18
200-BK-18
180-GN
311-WH-18
152-BU
5
3
184-RD
321-BR-18
2
3
4
5
6
1
8
7
9
10
11
12
L17
L18
200-BK-14
M736-BU-18
189-RD
A761-PU-18
F773-OR-18
F774-WH-18
492-GY-18
K779-PU-18
334-BU-14
109-RD-6
403-GN-18
E554-PK-18
304-WH-8
101-RD-6
405-GY-18
C468-BU-18
235-BK-18
788-YL-18
A762-PU-18
616-BU
322-GY
607-PK
495-GN-18
487-OR-18
491-PK-18
496-WH-18
A768-BU-18
A769-GY-18
200-BK-14
147-PU
K904-GN-18
L21
L20
L28
L21
L26
L20
L28
L15
M741-GY-18
M734-BR-18
A758-BR-18
A757-GY-18
M742-PU-18
L972-BU-18
A756-BU-18
A755-PK-18
K849-YL-18
H465-GN-18
410-WH-18
L968-OR-18
H467-WH-18
H466-BU-18
L969-WH-18
K907-BU-18
SW 2
SW 1
SW COM
892-BR-18
892-BR-18
893-GN-18
893-GN-18
412-BU-18
430-BU-18
G976-BU-18
200-BK-14
101-RD-6
168-RD-14
109-RD-6
304-WH-8
189-RD
A588-GN
334-BU-14
184-RD
PWM OUTPUT
403-GN-18
K779-PU-18
616-BU
322-GY
607-PK
308-YL
CHASSIS
GND
+B
K906-GN-18
A768-BU-18
A769-GY-18
F774-WH-18
F773-OR-18
E554-PK-18
235-BK-18
235-BK-18
200-BK-18
892-BR-18
893-GN-18
607-PK
322-GY
616-BU
K779-PU-18
184-RD
235-BK-18
A588-GN
189-RD
304-WH-8
109-RD-6
140-BU
101-RD-6
200-BK-14
147-PU
G976-BU-18
430-BU-18
412-BU-18
235-BK-18
200-BK-18
M739-YL-18
M737-WH-18
M738-OR-18
T967-YL-18
K904-GN-18
147-PU
A769-GY-18
A768-BU-18
496-WH-18
491-PK-18
487-OR-18
495-GN-18
607-PK
322-GY
616-BU
A762-PU-18
788-YL-18
C468-BU-18
405-GY-18
101-RD-6
304-WH-8
E554-PK-18
334-BU-14
109-RD-6
E474-OR-18
K779-PU-18
492-GY-18
168-RD-14
235-BK-18
235-BK-18
235-BK-18
200-BK-18
235-BK
200-BK-14
E472-GN-18
RD-00
RD-00
235-BK-18
T967-YL-18
M738-OR-18
ATCH
JOYSTICK
177-7712
(NOTE E)
TJ
K777-GY-18
L971-GN-18
K777-GY-18
L971-GN-18
403-GN-18
615-YL
K851-BU-18
308-YL
763-BU-18
K852-GN-18
A588-GN
K906-GN-18
235-BK-18
235-BK-18
H476-WH-18
A/C HEATER
PHOTO SENSOR
167-7083
310-PU-18
403-GN-18
403-GN-18
147-PU
235-BK-18
147-PU
403-GN-18
M736-BU-18
M736-BU-18
M736-BU-18
M736-BU-18
235-BK-18
L971-GN-18
235-BK-18
K777-GY-18
L971-GN-18
K777-GY-18
147-PU
200-BK-18
E554-PK-18
F773-OR-18
F774-WH-18
A769-GY-18
A768-BU-18
K906-GN-18
N 167-3456 F-1
F774-WH-18
F773-OR-18
A761-PU-18
189-RD
M736-BU-18
IMPLEMENT
PRESS. SW
170-9335
C
TRAVEL
PRESS. SW
170-9335
L22
C
235-BK-18
607-PK
322-GY
616-BU
K779-PU-18
E554-PK-18
F773-OR-18
F774-WH-18
A769-GY-18
A768-BU-18
K906-GN-18
506-PU-18
892-BR-18
403-GN-18
A588-GN
189-RD
893-GN-18
304-WH-8
308-YL
109-RD-6
101-RD-6
200-BK-14
147-PU
235-BK
L23
L13
L14
893-GN-18
892-BR-18
892-BR-18
893-GN-18
893-GN-18
892-BR-18
763-BU-18
M737-WH-18
M738-OR-18
788-YL-18
L24
M739-YL-18
A762-PU-18
492-GY-18
495-GN-18
403-GN-18
A761-PU-18
K904-GN-18
491-PK-18
T967-YL-18
496-WH-18
C468-BU-18
405-GY-18
487-OR-18
L24
L22
L23
M737-WH-18
506-PU-18
2
3
4
M736-BU-18
1
12
11
10
9
7
8
1
6
5
4
235-BK-18
235-BK-18
235-BK
3
2
CCCC
AAAA
321-BR-18
235-BK-18
C
M739-YL-18
ATCH
TRAVEL ALARM
3E-7738
200-BK-18
200-BK-18
A588-GN-18
BK
RD
NOTE J: USE WITH FRONT GUARD CAB LAMP.
NOTE H: USE 202-3127 WITH BLADE ATCH.
C599-OR-18
200-BK-18
TK 186-4629 A-9 (NOTE G)
200-BK
118-GY-14
152-BU
G
F
E
D D
C
H H
A
B
5A
147-PU
147-PU
K879-GN
K872-OR
K871-WH
147-PU
147-PU
K871-WH
K872-OR
308-YL
308-YL
147-PU
308-YL
K879-GN
K872-OR
147-PU
607-PK-18
147-PU
K879-GN
147-PU
K871-WH
K872-OR
K879-GN
K872-OR
K871-WH
147-PU
L25
BK-18
BU-18
YL-18
WH-18
YL-18
BU-18
BK-18
BK-18
WH-18
YL-18
RD-18
BK-18
BU-18
140-BU
334-BU-14
334-BU-14
A588-GN-18
E473-GY-18
E472-GN-18
E472-GN-18
E474-OR-18
235-BK-18
235-BK-18152-BU
8630-BU-18
152-BU
10A
200-BK-18
638-WH
E
1
C591-PK-18
C588-BR-18
C587-OR-18
C599-OR-18
638-WH
310-PU-18
ATCH BEACON RELAY
161-3128
168-RD-14
12
200-BK-14
HAMMER
CONT SW
SW
BLADE SW
11
3
200-BK-14
5
10
2
3
4
GY-18
BU-18
RD-18
BK-18
168-RD-14
168-RD-14
325-PK-18
WH-18
BR-18
1
5
325-PK-18
325-PK-18
168-RD-14
200-BK-14
325-PK-18
B
A
C
1
6
5
3
L20
L28
L29
L28
L26
L20
L27 L27
L29
ENG
ATCH START
AID SOL
3E-6332
9
7
C
317-YL-18
CHASSIS
RD-00
RD-00
8
1
ENGINE
ENGINE
311-WH-18
L18
ENGINE
SC
L17
ENGINE
L17
4
6
5
4
3
2
308-YL
K906-GN-18
A588-GN
6
308-YL
A588-GN-18
8630-BU-18
TL
200-BK-14
763-BU-18
176-RD
AUX CKT
365-YL-18
L976-GN-18
L976-GN-18
365-YL-18
365-YL-18
L976-GN-18
325-PK-18
168-RD-14
B
C
A
X W
2
1
X X
ATCH
REFUELING
RELAY 1
149-5050
ATCH
REFUELING PUMP
123-3928
ATCH
REFUELING
START SW(NO)
6T-9442
+
-
ATCH
REFUELING
RELAY 2
149-5050
WW
ATCH
REFUELING
STOP SW(NC)
9X-4184
M 167-3456 F-1
VV
V
200-BK-18
AIR HEATER RELAY
161-3128
E
317-YL-14
200-BK-18
317-YL-18
315-GN-14
310-PU-18
YL-18
RD-18
WH-18
101-RD-6
310-PU-18
V
V
317-YL-18
317-YL-14
607-PK
607-PK
315-GN-14
L20
L19
RELAY PANEL
112-PU-6
101-RD-6
109-RD-6
CCC
BLOCK
121-1023
109-RD-6
101-RD-6
200-BK-18
200-BK-18
TJ
WF
WE
WC
WA
L16L16
L14
L15
L14
L15
308-YL
140-BU
143-BR-18
ALT REGULATOR
FUEL PUMP
140-BU
RELAY PANEL
RELAY PANEL
646-RD-18
646-RD-18
607-PK
2
3
4
5
6
1
12
11
10
9
7
8
1
6
5
4
3
2
12
11
10
9
7
8
1
6
5
4
3
2
START RELAY
125-1302
WE WF
1
2
A770-PK-18
169-PK-18
169-PK-18
308-YL
308-YL
308-YL-18
200-BK
101-RD-6
306-GN
101-RD-6
10A
112-PU-6
A770-PK-18
10A
200-BK-18
151-GN
308-YL
C987-RD-14
168-RD-14
A588-GN
189-RD
892-BR-18
893-GN-18
140-BU
334-BU-14
184-RD
317-YL-18
607-PK
322-GY
616-BU
151-GN
200-BK-14
304-WH-8
109-RD-8
109-RD-6
101-RD-6
317-YL-14
169-PK-18
169-PK-18
308-YL-18
308-YL
200-BK-14
308-YL
C589-GY-18
646-RD-18
310-PU-18
113-OR-18
169-PK-18
103-RD
118-GY-14
147-PU
307-OR
180-GN
124-GN-14
120-YL
175-RD-14
151-GN
308-YL
154-RD
200-BK-18
308-YL-18
A770-PK-18
310-PU-18
893-GN-18
169-PK-18
892-BR-18
616-BU
607-PK
C987-RD-14
184-RD
322-GY
A588-GN
168-RD-14
308-YL
E
WA
WG
CC
EEEEEE
A
A770-PK-18
169-PK-18
AA
123-WH
308-YL
306-GN
169-PK-18
308-YL-18
308-YL
147-PU
101-RD-6
101-RD-6
304-WH-8
109-RD-8
112-PU-6
A
C
B
169-PK-18
308-YL
MAIN RELAY
DIODE
121-1022
MAIN RELAY
165-4026
2
3
4
5
6
1
8
7
9
10
11
12
BACKUP
RESISTOR
102-8016
308-YL
WJ
E
E
E
RELAY PANEL
189-RD
129-BU
105-RD
K779-PU-18
152-BU
140-BU
189-RD
615-YL
645-RD-18
320-RD-18
112-PU-6
147-PU
A770-PK-18
169-PK-18
308-YL
317-YL-18
154-RD
307-OR
151-GN
320-RD-18
129-BU
180-GN
120-YL
123-WH
124-GN-14
307-OR
113-OR-18
118-GY-14
154-RD
152-BU
175-RD-14
320-RD-18
103-RD
615-YL
129-BU
180-GN
120-YL
123-WH
124-GN-14
113-OR-18
118-GY-14
152-BU
645-RD-18
175-RD-14
103-RD
615-YL
645-RD-18
189-RD
189-RD
189-RD
168-RD-14
A588-GN
322-GY
189-RD
184-RD
C987-RD-14
607-PK
616-BU
892-BR-18
893-GN-18
317-YL-18
200-BK-18
200-BK-14
306-GN
169-PK-18
308-YL-18
308-YL
200-BK-14
200-BK-18
235-BK-18
200-BK
200-BK-18
105-RD
200-BK-18
151-GN
105-RD
151-GN
200-BK-18
235-BK-18
A770-PK-18
200-BK
189-RD
200-BK-14
2
1
101-RD-6
3
18
5
6
12
11
26
31
37
38
40
41
42
43
54
53
48
47
46
45
34
32
28
27
26
9
7
50
47
30
39
45
21
12
22
11
23
10
34
30
40
31
32
41
33
43
4
29
5
6
48
42
36
44
2
23
19
8
19
7
4
16
25
20
33
17
27
21
10
52
24
14
15
13
8
9
51
29
39
50
35
49
1
22
46
1
2
3
15
49
44
54
14
35
20
13
38
51
36
37
28
52
16
17
53
18
24
25
487-OR-18
405-GY-18
C468-BU-18
496-WH-18
T967-YL-18
491-PK-18
A762-PU-18
M739-YL-18
788-YL-18
M738-OR-18
M737-WH-18
763-BU-18
235-BK
G976-BU-18
412-BU-18
430-BU-18
184-RD
L21L21
L20
1
6
2
7
4
8
430-BU-18
G976-BU-18
K851-BU-18
K852-GN-18
892-BR-18
405-GY-18
487-OR-18
C468-BU-18
893-GN-18
496-WH-18
412-BU-18
K849-YL-18
A757-GY-18
A758-BR-18
M734-BR-18
K904-GN-18
M741-GY-18
308-YL
K850-BR-18
235-BK
184-RD
A755-PK-18
A756-BU-18
L972-BU-18
M742-PU-18
235-BK
184-RD
M736-BU-18
T967-YL-18
M736-BU-18
491-PK-18
403-GN-18
A761-PU-18
A761-PU-18
K904-GN-18
492-GY-18
495-GN-18
A762-PU-18
410-WH-18
H465-GN-18
M737-WH-18
M738-OR-18
K852-GN-18
K851-BU-18
K849-YL-18
K850-BR-18
893-GN-18
ATCH STEM 3 SWING CANCEL
OVERLOAD ALARM CANCEL SW
PUMP DISCHARGE 1 PRESS. SENSOR
SENSOR GND
200-BK-18
TRAVEL STRAIGHT SOL
AIR HEATER RELAY
OPTION CONT SOL
FAN MOTOR CONT SOL
TRAVEL SPEED CHANGE SOL
FAULT ALARM
ATCH STEM 2 SWING CANCEL
CAT DATA LINK (-)
CAT DATA LINK (+)
TRAVEL RIGHT PRESS. SW
200-BK-18
OPTION PWM IN (1)
BACKUP SW
ENG/PUMP CONT
157-3165
TRAVEL MODE SW
AEC MODE SW
PUMP DISCHARGE 2 PRESS. SENSOR
O.L.W.D. PRESS. SENSOR
FUEL SECONDARY FILTER PLUGGED
FUEL PRIMARY FILTER PLUGGED
+12V SUPPLY
TRAVEL ALARM CANCEL SW
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
SOL GND 1
COOLANT LEVEL SW
ENG SPEED SENSOR (+)
ENG SPEED SENSOR (-)
PRIMARY NFC PRESS. SOL
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
HYD OIL LEVEL SW
AIR CLEANER SENSOR
HYD OIL TEMP SENSOR
WATER SEPARATOR LEVEL SW
COOLANT TEMP SENSOR
ALTERNATOR R TERM.
TRAVEL ALARM
ENG OIL PRESS. SW
SWING BRAKE CANCEL SOL
POWER SHIFT CONT SOL
SPECIAL FILTER PLUGGED
ATCH STEM 1 SWING CANCEL
CAPSULE FILTER PLUGGED
+B
AIR HEATER CONTROLLER
STARTER RELAY
FLOW LIMIT PRESS. SOL
TRAVEL MODE IND
OPTION SW
KEY SWITCH ON
200-BK-18
K906-GN-18
OPTION CONT SOL
ONE TOUCH LOW IDLE SW
GND
OPTION SW
AEC MODE IND
TRAVEL ALARM CANCEL IND
GOVERNOR FEEDBACK
SENSOR GND
GND
+B
GOVERNOR COMMAND
ATCH STEM 4 SWING CANCEL
AUTO LUB FAILURE
C
321-BR-18
M741-GY-18
M734-BR-18
A758-BR-18
A757-GY-18
M742-PU-18
L972-BU-18
A756-BU-18
A755-PK-18
310-PU-18
321-BR-18
H465-GN-18
410-WH-18
L968-OR-18
H467-WH-18
H466-BU-18
L969-WH-18
M736-BU-18
K907-BU-18
892-BR-18
893-GN-18
M736-BU-18
L969-WH-18
K907-BU-18
763-BU-18
M739-YL-18
L968-OR-18
788-YL-18
SOL GND 4
SOL GND 3
SOL GND 2
TRAVEL STRAIGHT PRESS. SW
235-BK
892-BR-18
H466-BU-18
A588-GN
SWITCH RETURN
308-YL
L24
L22
L24
L22
L23
L23
H467-WH-18
403-GN-18
495-GN-18
492-GY-18
C
FINE SWING SW
TRAVEL PRESS. SW
JOYSTICK PRESS. SW
L971-GN-18
L971-GN-18
K777-GY-18
184-RD
184-RD
H476-WH-18
147-PU
K879-GN
147-PU
607-PK-18
607-PK-18
K856-PU-18
K848-WH-18
K847-PU-18
K844-GY-18
C987-RD-14
308-YL
151-GN
607-PK-18
607-PK-18
K871-WH
200-BK-18
200-BK-18
200-BK-18
F
ATCH 1PUMP-2PUMP
EXCHANGE SW
170-6955 (NOTE G)
ATCH SINGLE-DOUBLE
ACTION EXCHANGE SW
170-6956 (NOTE G)
200-BK-18
F
K872-OR
BK-18
WH-18
BK-18
BU-18
WH-18
RD-18
YL-18
YL-18
M962-YL-18
C
A
TH
A
B
RD-18
955-BU-18
BK-18
M962-YL-18
955-BU-18
BK-18
K871-WH
K872-OR
147-PU
308-YL
955-BU-18
K879-GN
147-PU-18
147-PU
K879-GN
K879-GN
K872-OR
K871-WH
L31
F443-GN-18
200-BK-18
A588-GN-18
779-WH-18
H455-OR-18
F443-GN-18
779-WH-18
H455-OR-18
779-WH-18
779-WH-18
E472-GN-18
E473-GY-18
DIODE
121-1022
E474-OR-18
K870-GN-18
K872-OR
K871-WH
K864-PK-18
K874-BR-18
K866-WH-18
308-YL
K843-GN-18
K856-PU-18
235-BK-14
C987-RD-14
C987-RD-14
235-BK-14
K850-BR-18
K851-BU-18
K852-GN-18
K849-YL-18
892-BR-18
893-GN-18
K869-BU-18
K861-GN-18
K862-GY-18
K857-WH-18
K858-YL-18
K860-BU-18
235-BK-14
10A
E472-GN-18
K870-GN-18
K869-BU-18
K868-BR-18
E473-GY-18
M906-BU-18
K850-BR-18
892-BR-18
893-GN-18
308-YL
235-BK-14
C987-RD-14
235-BK-14
C987-RD-14
K861-GN-18
E474-OR-18
K851-BU-18
K862-GY-18
K857-WH-18
K852-GN-18
K849-YL-18
K864-PK-18
K858-YL-18
K860-BU-18
K874-BR-18
K866-WH-18
151-GN
L27
L20
L26
L21 L21
K868-BR-18
607-PK-18
607-PK-18
K847-PU-18
25
K848-WH-18
K844-GY-18
K843-GN-18
K847-PU-18
24
18
53
17
16
52
28
37
36
51
38
13
20
35
14
54
44
49
15
3
2
1
46
22
1
49
35
50
39
29
51
9
8
13
15
14
24
52
10
21
27
17
33
20
25
16
4
7
19
8
19
23
2
44
36
42
48
6
5
29
4
43
33
41
32
31
40
30
34
10
23
11
22
12
21
45
39
30
47
50
7
9
26
MASK ENABLE
12V POWER SUPPLY
PUMP 1 NFC REDUCE SOL
LEFT FOOT PEDAL
PUMP 2 NEG CONT PRESS. SENSOR
RIGHT FOOT PEDAL
RIGHT JOYSTICK THUMBWHEEL
PUMP 1 NEG CONT PRESS. SENSOR
ATCH STEM 2 STATUS
ATCH STEM 4 EXTEND SOL
27
28
32
34
45
46
ATCH STEM 2 RETRACT SOL
47
48
53
54
43
HYD LOCK CANCEL SWITCH
ATCH STEM 1 EXTEND SOL
LEFT JOYSTICK THUMBWHEEL
ATCH STEM 3 STATUS
42
VARIABLE RELIEF 2 SOL
ATCH STEM 3 RETRACT SOL
RS-232 GND
CAT DATA LINK(-)
OPTION SWITCH(1)
OPTION SWITCH(2)
ATCH STEM 2 EXTEND SOL
SEPARATE LOAD PRESS. SENSOR
ATCH STEM 4 STATUS
RS-232 TX
RS-232 RX
CAT DATA LINK(+)
OPTION SWITCH(3)
OPTION SWITCH(4)
ATCH STEM 1 STATUS
VARIABLE RELIEF 1 SOL
SENSOR RETURN
ATCH STEM 4 RETRACT SOL
KEY SWITCH
LEFT JOYSTICK SWITCH(2)
LEFT JOYSTICK SWITCH(1)
ATCH TOOL SWITCH(4)
ATCH TOOL SWITCH(3)
ATCH STEM 3 EXTEND SOL
ATCH STEM 1 RETRACT SOL
41
40
38
37
SEPARATE VALVE SOL
763-BU-18
5A
31
26
GND
+B
RD-18
RIGHT JOYSTICK SWITCH(2)
RIGHT JOYSTICK SWITCH(1)
101-RD-6
112-PU-6
ATCH TOOL SWITCH(2)
ATCH TOOL SWITCH(1)
1WAY/2WAY CHANGE SOL
TJ
SWITCH RETURN
SWITCH RETURN
SOL RETURN
PUMP 2 NFC REDUCE SOL
235-BK-18
235-BK-18
646-RD-18
235-BK-18
ATCH SQUEEZE PRESS. SENSOR
+B
11
E
200-BK-18
1
WH-18
RD-18
BK-18
200-BK-18
L27
L20
L20
L26
L30
L26
L27
L29
L30
12
F774-WH-18
F773-OR-18
SOL RETURN
VARIABLE RELIEF 1 CHECK SOL
6
235-BK-18
A761-PU-18
189-RD
M736-BU-18
GND
F/B
+B
ACCEL
DECEL
6
ENG GOV
ACTUATOR
185-2481
2
1
-
5
4
8
7
ESS
3
M739-YL-18
M738-OR-18
M737-WH-18
T967-YL-18
K904-GN-18
147-PU
147-PU
A769-GY-18
A768-BU-18
235-BK-18
235-BK-18
487-OR-18
491-PK-18
A768-BU-18
147-PU
235-BK-18
A769-GY-18
496-WH-18
607-PK
200-BK-14
322-GY
235-BK-18
616-BU
495-GN-18
147-PU
L29
K904-GN-18
T967-YL-18
235-BK-18
+B
GROUND
SIGNAL
BK-18
RD-18
B
C
A
SIGNAL
GROUND
+B
PUMP DISCHARGE
PRESS. SENSOR 2
157-3182
PUMP DISCHARGE
PRESS. SENSOR 1
157-3182
POWER SHIFT
CONT SOL
111-9916
235-BK-18
200-BK-18
M736-BU-18
189-RD
A761-PU-18
F773-OR-18
F774-WH-18
C C C
A
C
B
1
2
WH-18
147-PU
L17 L17
C
L11
AIR HEATER
RESISTOR
7W-1251
E
323-WH-14
2
1
L976-GN-18
365-YL-18
L976-GN-18
168-RD-14
168-RD-14
323-WH-14
365-YL-18
L976-GN-18
168-RD-14
168-RD-18
365-YL-18
325-PK-18
168-RD-18
L976-GN-18
200-BK-14
C
C U
A
2
1
ATCH
AUX HYD
PRESS. SW
167-3466
(NOTE F)
K852-GN-18
235-BK-18
NOTE E: USE WITH CONFIG.G14.
235-BK
235-BK
M736-BU-18
235-BK-18
235-BK-18
235-BK-18
235-BK-18
235-BK-18
235-BK-18
235-BK
A
2
1
235-BK-18
ATCH
MEDIUM LINE
PRESS. SW
167-3466
(NOTE D)
5
235-BK-18
K851-BU-18
235-BK-18
235-BK-18
180-GN-18
180-GN-18
C599-OR-18
C599-OR-18
E473-GY-18
K864-PK-18
235-BK-18
H476-WH-18
K870-GN-18
ATCH
JOYSTICK
PRESS SW
167-3466
(NOTE G)
1
2
A
2
ATCH HAMMER
PRESS. SW 2
167-3466
(NOTE G)
235-BK-18
1
2
K849-YL-18
235-BK-18
E473-GY-18
E473-GY-18
C588-BR-18
C588-BR-18
2
200-BK-18
1
2
2
1
1
C588-BR-18
2
180-GN-18
180-GN-18
235-BK-18
C599-OR-18
180-GN-18
C588-BR-18
J
6
5
4
3
2
1
E473-GY-18
1
2
3
4
5
6
H
C589-GY-18
DIODE
121-1022
C589-GY-18
C589-GY-18
C587-OR-18
A588-GN-18
780-WH-18
779-PU-18
638-WH
118-GY-14
PRODUCT LINK
PL201
209-6417
780-PU-18
180-GN-18
C587-OR-18
A588-GN-18
A588-GN-18
K844-GY-18
TH
L31
K857-WH-18
K861-GN-18
K868-BR-18
K868-BR-18
K869-BU-18
K862-GY-18
235-BK-18
K866-WH-18
200-BK-18
A588-GN-18
334-BU-14
BK
BR
GN
RD/BU
615-YL
L25
OPERATOR STATION
OPERATOR STATION
L3
200-BK-14
607-PK
E554-PK-18
175-RD-14
200-BK-14
124-GN-14
BK
HEATER UNIT
164-0490
RD
307-OR
151-GN
308-YL
154-RD
113-OR-18
308-YL-18
129-BU
124-GN-14
118-GY-14
152-BU
103-RD
175-RD-14
C599-OR-18
646-RD-18
105-RD
169-PK-18
189-RD
607-PK
607-PK
607-PK
607-PK
645-RD-18
A770-PK-18
320-RD-18
C587-OR-18
C588-BR-18
403-GN-18
8630-BU-18
506-PU-18
H467-WH-18
H466-BU-18
410-WH-18
M742-PU-18
H465-GN-18
L6
M741-GY-18
M734-BR-18
892-BR-18
893-GN-18
F773-OR-18
F774-WH-18
L968-OR-18
L969-WH-18
K907-BU-18
L972-BU-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
M736-BU-18
A769-GY-18
A768-BU-18
K906-GN-18
K849-YL-18
E554-PK-18
180-GN-18
638-WH
180-GN-18
200-BK
200-BK-14
780-PU-18
200-BK-14
C599-OR-18
307-OR
169-PK-18
123-WH-18
152-BU
118-GY-14
646-RD-18
645-RD-18
129-BU
113-OR-18
103-RD
A770-PK-18
105-RD
L15
L16
189-RD
151-GN
154-RD
320-RD-18
L16
BK
607-PK
L15
175-RD-14
124-GN-14
615-YL
C589-GY-18
C591-PK-18
C589-GY-18
308-YL
M741-GY-18
M734-BR-18
A758-BR-18
A757-GY-18
M742-PU-18
403-GN-18
235-BK-18
E554-PK-18
F773-OR-18
F774-WH-18
A769-GY-18
A768-BU-18
K906-GN-18
L972-BU-18
A756-BU-18
A755-PK-18
K849-YL-18
H465-GN-18
410-WH-18
L968-OR-18
H466-BU-18
L969-WH-18
K907-BU-18
H467-WH-18
506-PU-18
M736-BU-18
8630-BU-18
200-BK-18
200-BK-18
200-BK-18
120-YL
123-WH-18
C588-BR-18
C587-OR-18
H476-WH-18
K852-GN-18
K851-BU-18
A588-GN-18
A588-GN-18
200-BK-18
200-BK-18
200-BK-14
123-WH-18
F444-PU-18
F443-GN-18
893-GN-18
892-BR-18
308-YL
6
1
3
4
5
2
A
ATCH
A/C UNIT
161-3779
780-WH-18
779-PU-18
180-GN-18
180-GN-18
180-GN
200-BK-14
123-WH
L32
123-WH-18
123-WH-18
638-WH
120-YL
235-BK-18
C
235-BK-18
235-BK-18
K868-BR-18
K869-BU-18
K857-WH-18
K861-GN-18
1
K856-PU-18
M906-BU-18
308-YL
200-BK-18
200-BK-18
V
L20
K849-YL-18
K849-YL-18
K849-YL-18
K851-BU-18
K851-BU-18
K851-BU-18
K852-GN-18
K852-GN-18
K852-GN-18
K851-BU-18
K849-YL-18
H476-WH-18
K777-GY-18
IMPLEMENT PRESS. SW
310-PU-18
200-BK-18
200-BK-14
200-BK-14
200-BK-14
200-BK
200-BK-18
200-BK-18
200-BK
18
3
GND
VARIABLE RELIEF 2 CHECK SOL
ATCH VALVE CONT
157-3200
(NOTE E)
M906-BU-18
235-BK-18
235-BK-18
140-BU
311-WH-18
A762-PU-18
788-YL-18
C468-BU-18
405-GY-18
101-RD-6
304-WH-8
E554-PK-18
403-GN-18
109-RD-6
334-BU-14
K779-PU-18
492-GY-18
235-BK-18
311-WH-18
235-BK-18
235-BK-18
311-WH-18
140-BU
140-BU
140-BU
168-RD-14
235-BK-18
200-BK
311-WH-18
F444-PU-18
F443-GN-18
140-BU
180-GN-18
C
334-BU-14
168-RD-14
235-BK-18
235-BK-18
235-BK-18
235-BK-18
235-BK-18
2
1
779-WH-18
780-PU-18
L30
120-YL
211-BK
L30
K862-GY-18
210-BK
C578-YL
L30
310-PU-18
F
ATCH RADIO SW
201-5342
200-BK-18
200-BK-18
135-BU
310-PU-18
779-WH-18
F443-GN-18
F443-GN-18
893-GN-18
A588-GN-18
K871-WH
ATCH BLADE CONT
191-4789
780-WH-18
334-BU-14
C578-YL
607-PK-18
8630-BU-18
779-PU-18
168-RD-14
118-GY-14
311-WH-18
310-PU-18
F444-PU-18
CAB
F443-GN-18
F444-PU-18
235-BK-18
638-WH
502-BU-18
638-WH
8
7
118-GY-14
C587-OR-18
1
6
5
607-PK-18
334-BU-14
200-BK-18
502-BU-18
317-YL-18
235-BK-18
F444-PU-18
892-BR-18
152-BU
147-PU
311-WH-18
317-YL-18
K864-PK-18
B
WL 183-1059 A-5
K858-YL-18
147-PU
607-PK
L5L5
180-GN-18
F443-GN-18
123-WH-18
8630-BU-18
308-YL
200-BK-14
M741-GY-18
893-GN-18
200-BK-14
169-PK-18
M734-BR-18
892-BR-18
BK-18
WH-18
YL-18
H467-WH-18
RD-18
H466-BU-18
A537-PK-18
235-BK-14
K866-WH-18
K874-BR-18
K870-GN-18
K860-BU-18
BK
BK-18
113-OR-18
K856-PU-18
308-YL
M742-PU-18
H465-GN-18
103-RD
646-RD-18
645-RD-18
129-BU
152-BU
615-YL
2
506-PU-18
410-WH-18
H465-GN-18
H466-BU-18
H467-WH-18
M741-GY-18
M742-PU-18
M734-BR-18
645-RD-18
646-RD-18
129-BU
403-GN-18
410-WH-18
ATCH BEACON SW
118-GY-14
506-PU-18
152-BU
892-BR-18
893-GN-18
169-PK-18
780-PU-18
F444-PU-18
123-WH-18
C587-OR-18
180-GN-18
A537-PK-18
ATCH AUX LINES/
VAB SW
201-8793
308-YL
310-PU-18
2
-
403-GN-18
200-BK-14
A A
12
11
10
9
7
8
1
6
5
4
3
2
21
20
19
18
17
16
15
14
13
F443-GN-18
779-WH-18
135-BU-14
A
235-BK-18
403-GN-18
410-WH-18
506-PU-18
502-BU-18
120-YL
615-YL
152-BU
129-BU
645-RD-18
646-RD-18
103-RD
H465-GN-18
M742-PU-18
113-OR-18
A537-PK-18
H466-BU-18
H467-WH-18
892-BR-18
M734-BR-18
169-PK-18
F
200-BK-14
893-GN-18
M741-GY-18
200-BK-18
8630-BU-18
200-BK-14
201-BK-18
200-BK
308-YL
200-BK
200-BK
310-PU-18
8630-BU-18
CAB
F
123-WH-18
780-PU-18
147-PU-18
607-PK-18
607-PK-18
2
502-BU-18
200-BK-18
779-WH-18
200-BK-14
200-BK-18
F
113-OR-18
607-PK-18
152-BU
310-PU-18
RD-18
120-YL
YL-18
RD-18
YL-18
WH-18
BK-18
103-RD
103-RD-18
607-PK-18
103-RD-18
WH-18
607-PK-18
615-YL
615-YL
118-GY-14
308-YL
615-YL
1
A584-BU-18
200-BK
200-BK-18
200-BK
200-BK-14
235-BK-18
135-BU
135-BU
200-BK
C569-YL
H476-WH-18
C468-BU-18
ANTENNA
167-3492
180-GN-18
F
235-BK-18
607-PK
12V 7A
SOCKET
121-0987
BK-18
F
2
200-BK
FF
A584-BU-18
201-BK-18
12
11
10
1
9
ATCH
BEACON
7
200-BK
8
1
6
5
4
3
2
13
14
15
16
17
18
2
3
4
5
6
1
638-WH
1
200-BK-18
200-BK
200-BK
200-BK
2
200-BK
CAB
CAB
OPERATOR STATION
OPERATOR STATION
200-BK-18
200-BK
8
7
9
10
11
12
200-BK-18
201-BK-18
200-BK
169-PK-18
103-RD
893-GN-18
892-BR-18
607-PK-18
200-BK-18
200-BK
F
210-BK
235-BK-18
235-BK-18
L4
135-BU
A584-BU-18
506-PU-18
L4
410-WH-18
403-GN-18
129-BU
135-BU
210-BK
C569-YL
638-WH
135-BU
211-BK
200-BK
200-BK
211-BK
646-RD-18
645-RD-18
M734-BR-18
310-PU-18
308-YL
M742-PU-18
113-OR-18
607-PK-18
M741-GY-18
607-PK-18
607-PK-18
607-PK-18
607-PK-18
607-PK-18
C587-OR-18
H467-WH-18
H466-BU-18
200-BK-18
180-GN-18
A537-PK-18
180-GN-18
180-GN-18
123-WH-18
310-PU-18
H465-GN-18
308-YL
A537-PK-18
F444-PU-18
607-PK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
C569-YL
1
C587-OR-18
ATCH BLADE SW
201-5344
ATCH OVER
LOAD WARNING SW
170-9317
ATCH SEAT
HEATER SW
163-6721
F FF
L2
F
2
AIR HEATER/
ATCH START AID SW
183-1007
123-WH-18
F444-PU-18
200-BK
200-BK-18
C569-YL
211-BK
210-BK
210-BK
ATCH
12V 7A
SOCKET
121-0987
(NOTE C)
210-BK
C578-YL
A584-BU-18
Y
2
C578-YL
200-BK-14
1
L2
L2
135-BU
135-BU
135-BU
K874-BR-18
317-YL-14
308-YL
K868-BR-18
K866-WH-18
235-BK-18
306-GN
K862-GY-18
K869-BU-18
K858-YL-18
K868-BR-18
K861-GN-18
K857-WH-18
235-BK-18
200-BK
235-BK-18
E
235-BK-18
235-BK-18
K860-BU-18
K864-PK-18
235-BK-18
K868-BR-18
K857-WH-18
ATCH STEM 2
EXTEND SOL
111-9916
TJ
2
1
1
2
TJ
ATCH STEM 2
RETRACT SOL
111-9916
K861-GN-18
235-BK-18
235-BK-18
K874-BR-18
K868-BR-18
VALVE GP 185-0507 (NOTE E)
K869-BU-18
200-BK-14
M962-YL-18 M962-YL-18
K871-WH
K872-OR
200-BK-18
8630-BU-18
180-GN-18
235-BK-18
235-BK-18
235-BK-18
235-BK-18
K848-WH-18
K844-GY-18
M906-BU-18
235-BK-18
200-BK
306-GN
200-BK
K874-BR-18
K779-PU-18
K870-GN-18
TJ
M737-WH-18
K868-BR-18
K856-PU-18
TJ
2
ALTERNATOR
DIODE
121-1022
1
1
2
TJ
K860-BU-18
E
200-BK
200-BK
START RELAY
DIODE
121-1022
235-BK-18
235-BK-18
K843-GN-18
K868-BR-18
M739-YL-18
E472-GN-18
E472-GN-18
K779-PU-18
235-BK-14
235-BK-18
235-BK-14
N
M
TJ
ATCH RELIEF
CHECK 1 SOL
165-9560
(NOTE E)
ATCH RELIEF 1
SOL
165-9629
(NOTE E)
K864-PK-18
308-YL
235-BK-18
235-BK-18
NOTE C: USE WITH ATCH 12V 7A CONVERTER.
308-YL
235-BK-18
K866-WH-18
TJ ATCH
RELIEF
CHECK 2 SOL
165-9560
(NOTE E)
WH-18
BK-18
RD-18 A
C
K858-YL-18
K869-BU-18
K862-GY-18
ATCH STEM 3
EXTEND SOL
111-9916
L30
235-BK-18
ATCH STEM 3
RETRACT SOL
111-9916
TJ
496-WH-18
491-PK-18
487-OR-18
235-BK-18
495-GN-18
235-BK-18
496-WH-18
616-BU
491-PK-18
487-OR-18
235-BK-18
235-BK-18
200-BK-14
322-GY
607-PK
235-BK-18
235-BK-18
B
ATCH SQUEEZE
PRESS. SENSOR
157-3182
(NOTE E)
TJ
2
TJ
+B
235-BK-18
200-BK-14
BK-18
YL
BK
235-BK-18
120-YL
120-YL
495-GN-18
235-BK-18
200-BK
607-PK
200-BK
322-GY
200-BK
616-BU
HYD OIL
FILTER SW
170-9419
HYD OIL
TEMP SENDER
4I-5394
HYD OIL
LEVEL SW
170-9376
1
2
2
1
K879-GN
C
T
FUEL LEVEL
SENSOR
163-6700
235-BK-18
495-GN-18
1
2
C C C
GROUND
SIGNAL
235-BK-18
K874-BR-18
1
1
2
K870-GN-18
L11 L11
L1 L1
L10
L9
L8
L7
BR-18
235-BK-18
235-BK-18
235-BK-18
K852-GN-18
K851-BU-18
403-GN-18
308-YL
200-BK-18
200-BK-14
180-GN-18
L26
180-GN-18
A537-PK-18
200-BK-18
1
2
ATCH SEAT WITH
SEAT HEATER
164-0505
L10
J
K870-GN-18
K864-PK-18
K857-WH-18
K861-GN-18
K868-BR-18
K858-YL-18
K869-BU-18
L8
K862-GY-18
L8
L9
L9
L25
L7
147-PU
K866-WH-18
L7
L7
K779-PU-18
143-BR-18
M906-BU-18
E473-GY-18
143-BR-18
L18
L18
235-BK-18
E472-GN-18
M739-YL-18
E474-OR-18
M737-WH-18
W 116-0096 A-3
K852-GN-18
K851-BU-18
K849-YL-18
L30
L972-BU-18
M962-YL-18
200-BK-18
235-BK-18
K847-PU-18
320-RD-18
235-BK-18
200-BK-18
200-BK-18
120-YL
C
200-BK-14
C591-PK-18
200-BK-18
200-BK-18
H476-WH-18
235-BK-18
K879-GN
C588-BR-18
502-BU-18
235-BK-18
HYD LOCK
SOL
121-1491
TRAVEL SPEED
CHANGE SOL
121-1491
SWING BRAKE
CANCEL SOL
121-1491
200-BK-18
A588-GN
235-BK-18
STD
JOYSTICK
SEE H6
235-BK-18
763-BU-18
C599-OR-18
M906-BU-18
K866-WH-18
235-BK-18
ATCH
JOYSTICK
177-7711
(NOTE E)
180-GN-18
A588-GN-18
200-BK-18
ATCH BLADE
143-2390
200-BK-18
502-BU-18 1
2
A
ATCH VALVE GP
FOR VAB/AUX LINES
K868-BR-18
K869-BU-18
200-BK-18
K906-GN-18
ATCH
FLOW LIMIT
PRESS. SOL
171-0188
(NOTE E,NOTE G)
L25
GN-18
BU-18
PK-18
BK-18
RD-18
200-BK-18
200-BK-18
200-BK-18
235-BK-18
200-BK-18
L26
K843-GN-18
TJ
607-PK
A758-BR-18
A757-GY-18
12
10
9
7
6
4
3
1
11
8
5
1
2
3
2 1
307-OR
C
607-PK
C
C
2
410-WH-18
506-PU-18
F444-PU-18
779-PU-18
615-YL
152-BU
129-BU
645-RD-18
646-RD-18
103-RD
H465-GN-18
M742-PU-18
113-OR-18
A537-PK-18
H466-BU-18
H467-WH-18
892-BR-18
M734-BR-18
118-GY-14
169-PK-18
200-BK-14
893-GN-18
M741-GY-18
780-WH-18
TJ
TK
2
L25
200-BK-14
L26
235-BK-18
308-YL
F443-GN-18
K849-YL-18
123-WH-18
502-BU-18
8630-BU-18
638-WH
C587-OR-18
403-GN-18
310-PU-18
J
1
L26
2
H
CONSOLE (LH)
CONSOLE (LH)
J
ATCH STEM 1
EXTEND SOL
111-9916
TK
1
C
M737-WH-18
M738-OR-18
M739-YL-18
VALVE GP 190-7820 (NOTE E)
SOL RETURN
ATCH STEM 1
RETRACT SOL
111-9916
SWITCH PANEL
1
2
2
1
VALVE GP 158-8251
OPERATOR STATION
CONSOLE (RH)
CONSOLE (RH)
CONSOLE (RH)
CONSOLE (RH)
105-RD
K862-GY-18
307-OR
K869-BU-18
K858-YL-18
K869-BU-18
K868-BR-18
K857-WH-18
K861-GN-18
K868-BR-18
2
1
308-YL
2
A758-BR-18
A757-GY-18
A756-BU-18
C599-OR-18
200-BK-14
607-PK
E554-PK-18
175-RD-14
200-BK-14
124-GN-14
310-PU-18
200-BK-18
780-WH-18
638-WH
779-PU-18
120-YL
123-WH-18
200-BK-14
M741-GY-18
893-GN-18
200-BK-14
169-PK-18
118-GY-14
M734-BR-18
892-BR-18
H467-WH-18
H466-BU-18
113-OR-18
M742-PU-18
H465-GN-18
103-RD
646-RD-18
645-RD-18
129-BU
152-BU
615-YL
L972-BU-18
235-BK-18
235-BK-18
B
8630-BU-18
506-PU-18
410-WH-18
A
A755-PK-18
235-BK-18
200-BK-18
607-PK
J
123-WH-18
A756-BU-18
E472-GN-18
A755-PK-18
105-RD
307-OR
308-YL
C588-BR-18
3
4
5
6
J
+B
GND
PWM OUTPUT
SW COM
SW 1
SOL RETURN
H
HORN SW
128-2134
2
SOL RETURN
E474-OR-18
E472-GN-18
C
235-BK-18
235-BK-18
BK-18
BK-18
235-BK-18
M736-BU-18
607-PK
A769-GY-18
169-PK-18
169-PK-18
A769-GY-18
235-BK-18
L5
L5
L6
200-BK-14
200-BK-18
A770-PK-18
F773-OR-18
F774-WH-18
L968-OR-18
L969-WH-18
K907-BU-18
L972-BU-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
105-RD
M736-BU-18
607-PK
A769-GY-18
A768-BU-18
K906-GN-18
235-BK-18
200-BK-18
200-BK-18
L12
K852-GN-18
502-BU-18
K851-BU-18
A768-BU-18
124-GN-14
200-BK-14
175-RD-14
E554-PK-18
607-PK
K906-GN-18
189-RD
235-BK-18
F773-OR-18
F774-WH-18
L968-OR-18
235-BK-18
M736-BU-18
F774-WH-18
1
235-BK-18
L969-WH-18
F773-OR-18
189-RD
151-GN
154-RD
A768-BU-18
235-BK-18
235-BK-18
K849-YL-18
200-BK-18
120-YL
SW 2
235-BK-18
C588-BR-18
C589-GY-18
200-BK-14
C589-GY-18
C591-PK-18
A770-PK-18
L972-BU-18
K906-GN-18
F773-OR-18
F774-WH-18
A755-PK-18
235-BK-18
4
3
L968-OR-18
2
235-BK-18
235-BK-18
L969-WH-18
A756-BU-18
A757-GY-18
A770-PK-18
J
C599-OR-18
A758-BR-18
307-OR
A770-PK-18
320-RD-18
308-YL
L968-OR-18
K907-BU-18
L969-WH-18
180-GN-18
K907-BU-18
E473-GY-18
E472-GN-18
169-PK-18
A537-PK-18
E472-GN-18
169-PK-18
E473-GY-18
+
118-GY-14
K907-BU-18
200-BK-18
169-PK-18
M736-BU-18
200-BK-18
235-BK-18
T
J
1
J
J
J
J
J
J
12
11
10
A
9
A537-PK-18
7
502-BU-18
8
BK-18
WH-18
RD-18
C591-PK-18
CHASSIS
ATCH
HAMMER
PRESS. SW
167-3466
(NOTE G)
235-BK-18
A
A
1
6
A
5
4
3
2
IND UNIT
163-6702
JJ
ATCH SUSPENDED
SEAT
GROUND
LIGHT
123-WH-18
200-BK-18
BACKUP SW
163-6710
SPEED
CHG SW
163-6711
1
2
ONE TOUCH
LOW IDLE SW
128-2134
S4
A580-GN-14
S3
S2
S1
COM
KEY SW
9G-7641
PLATFORM
A
ENG
SPEED DIAL
106-0107
NEUTRAL START
LIMIT SW
163-6785
OPERATOR STATION
R
C
S
B
OFF
A
ON
ST
6
5
4
3
2
1
105-RD
169-PK-18
F444-PU-18
502-BU-18
F443-GN-18
200-BK-14
308-YL
TJ
403-GN-18
607-PK
2
3
4
5
6
1
200-BK-18
8
169-PK-18
169-PK-18
308-YL
326-RD
A769-GY-18
307-OR
105-RD
200-BK-14
7
9
10
11
12
2
1
K906-GN-18
A768-BU-18
1
L26
235-BK-18
2
200-BK-18
123-WH-18
SE
A
200-BK-18
C
B
A
200-BK-18
A537-PK-18
320-RD-18
H
WH-18
1
WH-18
200-BK-18
2
A579-OR-14
WIPER MOTOR
186-5763
F
MOTOR
501-GN-18
3
9
4
8
5
6
7
2
1
A580-GN-14
BRAKE WIP
WIPER SW
11
10
INT SP 2
GND IN
+24V IN
6
5
4
4
3
INT SP 1
MOT WIPER
WINDOW SW
WASHER SW
MOT WASH
200-BK-14
L30
K858-YL-18
K868-BR-18
YL/WH
YL/GN
147-PU
120-YL
103-RD-18
H467-WH-18
+
-
C538-OR-18
H465-GN-18
H466-BU-18
H467-WH-18
186-4555 H 01
M741-GY-18
113-OR-18
M742-PU-18
M734-BR-18
200-BK
322-GY
200-BK
616-BU
200-BK
616-BU
645-RD-18
IDENT PART NO. LOC
GY
PU
BR
RED
WHITE
ORANGE
646-RD-18
129-BU
C537-GN-18
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
403-GN-18
410-WH-18
118-GY-14
506-PU-18
A584-BU-18
200-BK-14
118-GY-14
607-PK-18
892-BR-18
893-GN-18
103-RD-18
169-PK-18
200-BK-14
200-BK
200-BK-18
A579-OR-14
616-BU
CAB
CAB
CAB
A580-GN-14
OPERATOR STATION
OPERATOR STATION
200-BK
615-YL
200-BK-18
A584-BU-18
615-YL
200-BK
M741-GY-18
201-BK-18
200-BK
615-YL
200-BK-14
C537-GN-18
646-RD-18
645-RD-18
C538-OR-18
200-BK-14
169-PK-18
103-RD-18
893-GN-18
113-OR-18
892-BR-18
607-PK-18
A579-OR-14
A584-BU-18
590-GY-18
530-OR-18
506-PU-18
118-GY-14
646-RD-18
235-BK-18
A
118-GY-14
410-WH-18
501-GN-18
A586-OR-18
590-GY-18
530-OR-18
200-BK-18
H465-GN-18
235-BK-18
410-WH-18
310-PU-18
200-BK-18
M734-BR-18
645-RD-18
501-GN-18
322-GY
FOR A SINGLE SHEET VERSION OF THIS SCHEMATIC
CONTACT DESIGN CONTROL.
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.
590-GY-18
530-OR-18
200-BK-18
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
THIS SCHEMATIC IS FOR THE 312C EXCAVATOR.
M742-PU-18
129-BU
200-BK
NOTE A: WIRE PAIRS MUST BE TWISTED AT LEAST
1 TURN PER 25MM.
NOTE B: USE WITH COLD WEATHER.
K868-BR-18
200-BK
200-BK-14
K868-BR-18
200-BK-14
113-OR-18
A584-BU-18
200-BK-18
403-GN-18
A586-OR-18
118-GY-14
C538-OR-18
C537-GN-18
M734-BR-18
200-BK-18
607-PK-18
892-BR-18
L3
200-BK-18
169-PK-18
L3
403-GN-18
200-BK
201-BK-18
129-BU
2
1
103-RD-18
L4
L4
C537-GN-18
200-BK
200-BK
H466-BU-18
M742-PU-18
A586-OR-18
615-YL
615-YL
C538-OR-18
893-GN-18
L2
L2
L2
615-YL
ACTION ALARM
132-1829
F F
CDL -
19
18
17
16
200-BK
F
W. INT (6)
200-BK-14
-
F
15
6
3
4
5
12
11
7
13
8
14
10
TRAVEL MODE IND 1
TRAVEL MODE SW
20
TRAVEL MODE IND 2
1
2
7
6
5
4
3
8
1
2
9
1
2
F
F
BUZZER AS
113-4683
H455-OR-18 2
1200-BK-18
L30
ROTARY SW
155-2715
BK
BU
GN
GG
BN
ATCH
A/C SW PANEL
157-3210
F
AEC MODE IND
AEC MODE SW
ALARM CANCEL IND
ALARM CANCEL SW
F
CAB
WINDOW LIMIT SW
(FRONT)
117-6306
F
+B
L. CHASSIS
L. BOOM
WASH
W. LOW
W. INT (3)
GND
GND
LIGHT
CDL +
+B
+12V
ACC
200-BK-14
WIPER CONT
188-7681
506-PU-18
N
MONITOR
157-3198
ATCH
CAB LAMP
167-3441
3
SWITCH PANEL
163-6701
2
SERVICE
METER
6T-7337
A584-BU-18
M
1
F
CIGAR
LIGHTER
9W-0335
F
235-BK-18
200-BK
200-BK
200-BK
200-BK-18
200-BK-18
235-BK-18
200-BK-18
200-BK
200-BK-14
201-BK-18
607-PK
200-BK
L2
235-BK-18
WJ 193-3527 J-7
WH 197-4442 G-10
WG 193-3526 J-7
WF 111-4829 G-8
WE 163-6757 G-8
WC 170-6935 G-8
WA 193-3525 G-8
SOL RETURN
X 116-0098 A-3
TJ 197-4442 D-7 (NOTE E)
CA 211-2062 J-12
CABLE AS.
WIRE AS.
M 170-9295 F-1 (NOTE J)
L 145-0560 C-2
K 121-1010 C-2
J 199-4826 H-2
H 199-4825 J-2
G 163-6810 F-2
F 200-5661 F-4
E 199-1267 G-8 (NOTE H)
C 199-1265 G-8
322-GY
200-BK
616-BU
HARNESS AS.
RD-18
N 170-9295 F-1 (NOTE J)
T 170-6828 G-1
308-YL
V 183-1060 B-3
SE 7G-1060 J-3
CE 170-6930 J-12
CC 170-6929 J-12
RD-18
200-BK
616-BU
200-BK
STRAP AS.
200-BK
607-PK
200-BK
SA 132-1805 G-11
SC 132-1805 A-11
NOTE D: USE 209-2942 WITH BLADE ATCH.
616-BU
SPACE
SPACE
L5L5
SPACE
HEATER SW PANEL
176-2005
ATCH
CAB LAMP
167-3441
SPACE
200-BK
200-BK
322-GY
322-GY
C
C
F
200-BK
F
SPACE
M741-GY-18
H467-WH-18
L
H466-BU-18
H465-GN-18
ATCH
BOOM LAMP (RH)
153-2521
L
A588-GN-18
FF
1
2
4
3
1
4
3
2
780-PU-18
779-WH-18
2
1
8
3
4
5
6
7
KK
FORWARD WARNING
HORN (LOW)
7Y-3919U
U
CHASSIS
LAMP
153-2523
ATCH
BOOM LAMP (LH)
153-2521
2
1
FORWARD WARNING
HORN (HIGH)
7Y-3920
U 183-1001 B-2
L1
151-GN
154-RD
200-BK-18
C589-GY-18
C588-GN-18
K852-GN-18
K852-GN-18
K852-GN-18
12 11 10
8
9 7 6 5 4 13 2
12 11 10
8
9 7 6 5 4 13 2
G
H
J
B
C
D
E
A
F
G
H
J
B
C
D
E
A
F
STARTING CIRCUIT.
GAUGE CIRCUIT.
CAT MONITOR SYSTEM.
PANEL LAMP CIRCUIT.
TURN SIGNAL AND WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE CONTROL CIRCUIT.
ATCH VALVE CONTROL.
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.
H#