COMPONENT LOCATION CHART
Machine Location
Component
Schematic Location
Machine Location
Component
SENR8332 November 1995
Schematic Location
C
Alarm - Action
D-7
18
Sender - Hydraulic (Gauge)
A-7
1
Alarm - Backup
F-9
19
Sender - Powertrain Oil (Gauge)
A-3
2
Alternator
A-1
16
Solenoid - Air Conditioner Clutch
A-2
3
Batteries - 12 Volt
F-6
20
Solenoid - Diverter Valve
E-8
E
Breaker - Alternator (60A)
E-8
12
Solenoid - Prelube Timer
D-2
E
Breaker - Blower Motor (20A)
F-7
20
Solenoid - Ripper Pin Puller
C-9
E
Breaker - Remote Condenser (20A)
F-7
21
Solenoid - Start Aid
B-2
4
Bus Bar
F-2
16
Suppressor - Arc
A-2
5
Converter - Voltage
F-5
16
Switch - A/C Refrigerant Pressure
B-2
B
Filter - Alternator
B-5
C
Switch - Backup Alarm
D-7
E
Fuses
E-7,E-8
7
Switch - Blower
D-6
B
Gauge - Coolant Temp
A-6
22
Switch - Coolant Temperature
B-2
B
Gauge - Fuel Level
A-5
14
Switch - Disconnect
F-5
B
Gauge - Hydraulic Oil Temp
B-5
23
Switch - Diverter Valve
A-7
B
Gauge - Powertrain Temp
B-6
24
Switch - Engine Coolant Flow (EMS)
B-2
6
Horn - Forward
E-1
22
Switch - Engine Coolant Temperature (EMS)
B-2
B
Lamp - Action
C-5
25
Switch - Engine Oil Pressure (EMS)
B-2
D
Lighter - Cigar
B-7
B
Switch - Flood Lamp
C-5
B
Meter - Service
B-6
D
Switch - Forward Horn
A-7
B
Monitor - Operator
7
Motor - Blower
7 8
C-6
A
Switch - Front Wiper
B-7
D-4,C-4
26
Switch - Fuel Pressure (EMS)
B-2
Motor - Condenser
B-9
18
Switch - Hydraulic Oil Temp (EMS)
A-7
Motor - Front Wiper
B-4
27
Switch - Hydraulic Oil Filter Press (EMS)
A-9
9
Motor - Left Wiper
F-5
27
Switch - Hydraulic Oil Filter Temp (EMS)
A-9
10
Motor - Rear Wiper
D-8
B
Switch - Key Start
D-5
11
Motor - Right Wiper
A-6
A
Switch - Left Wiper
B-7
12
Motor - Starter (Prelube Atch)
E-2
C
Switch - Neutral/Start
D-7
13
Motor - Washer Pump
A-8
12
Switch - Oil Pressure (Atch)
D-2
14
Outlet - Power
B-7
B
Switch - Operator Monitor Test
C-5
A
Radio
A-5
27
Switch - Powertrain Oil Filter Press (EMS)
A-8
15
Receptacle - Aux Start
F-2
19
Switch - Powertrain Oil Temp (EMS)
A-3
7
Relay
B-9
27
Switch - Powertrain Oil Filter Temp (EMS)
A-8
E
Relay - Main
F-8
A
Switch - Rear Wiper
B-8
E
Relay - Start
F-7
A
Switch - Right Wiper
B-8
7
Resistor - Blower Motor Speed
C-4
D
Switch - Ripper Pin Puller
A-8
12
Resistor - Starter Diagnostic
F-1
B
Switch - Running Lamp
C-5
16
Sender - Coolant Temperature (Gauge)
A-2
B
Switch - Start Aid
C-5
17
Sender - Fuel (Gauge)
B-9
7
Switch - Thermostat (A/C)
E-6
1
8
10 A
17
23 5 13
7
D
3
B
C 11
E
18
4
3
15
14
1
22
6
2
4
25
16
26 2
20
24
21
12 19
D8R Tractor Electrical System 7XM1-UP 9EM1-UP 13
3
Machine locations are repeated for components located close together. A = Components located in operator's compartment.
14
B = Components located in dash. C = Components located in operator's left console. 5
E = Components located on relay panel.
C
10
9
4
15 12
19
B
Part No.
Resistance (Ohms) ¹
9G-1950
Overall 2.0 ± .1; Tap 1.0 ± .05
Resistor - Starter/Diagnostic
6T-2217
150.0± 7.5
Solenoid - Air Conditioner Clutch
102-0347
14.4± 0.6
Solenoid - Diverter Valve
127-0574
31.0 ± 3.0
Solenoid - Ripper Pin Puller
9G-9988
24.9
Solenoid - Start Aid
3E-6332
6
21
6 16
22 25
20
RESISTOR AND SOLENOID SPECIFICATIONS
26
2
8
A
17
Resistor - Blower Motor Speed
4
E
3
D = Components located in operator's right console.
Component
9
27
D
23 1
2
11
24
27
1
18 7
¹At room temperature.
D39055
Machine Harness Connector And Component Locations
HARNESS CONNECTOR LOCATION CHART
Connectors
RELATED ELECTRICAL SERVICE MANUALS Title Alternator (100-5047): Consist No.100-5045 Consist No.100-5046
SENR4130 SENR2082
Electronic Monitoring System (EMS)
SENR2945
Starting And Charging Systems Starting Motor: (6V-0890) Consist No. 6V-0890
SENR2947
20 Contacts
Form No.
9 Contacts
SENR3860 8 Contacts
7 Contacts
Wire Number
WIRE DESCRIPTION CHART
Wire Color
Description
Wire Number
Wire Color
Power Distribution Circuits
Description Monitoring Circuits (cont'd)
101
RD
BAT
415
GN
OPR MON TEST SW
102
BU
HD LMP
424
GY
OPR MON POWER TRAIN TEMP
105
BR
KEY SW
426
BR
OPR MON POWER TRAIN OIL FILTER
108
BU
AUX CKT
441
OR
ENG COOLANT TEMP GAGE
109
OR
ALT OUTPUT (+) TERM.
442
GY
HYD SYSTEM TEMP GAGE
112
PU
MAIN POWER RELAY OUTPUT
443
YL
POWER TRAIN TEMP GAGE
113
OR
OPR MON PANEL VMIS B+ SWITCHED
449
BU
SPDOM SENDER (SIGNAL NO.1)
114
GN
WARNING HORN (FORWARD)
499
GY
OPR MON IMPLEMENT OIL FILTER
116
BR
AUX CKT
A447
PK
PRELUBE OIL PRESS
121
YL
BACKUP ALARM TO LAMP
123
WH
AUX CKT
500
BR
Accessory Circuits WIPER - FRONT (PARK)
124
GN
A/C
501
GN
WIPER - FRONT (LO)
OR
WIPER - FRONT (HI)
BK
Ground Circuits MAIN CHASSIS
502
200
503
BR
WIPER - REAR (PARK)
201
BK
OPR MON PANEL VMIS CMS
504
YL
WIPER - REAR (LO)
203
BK
CHASSIS DIAGNOSTIC
505
BU
WIPER - REAR (HI)
207
BK
STARTER DIAGNOSTIC
510
YL
WASHER - PRIMER
OR
A/C COMPRESSOR/REFRIGERANT PRESS. SW
BU
Basic Machine Circuits STARTER NO.1 SOL
513
301
515
GY
BLOWER MOTOR (HI)
302
OR
STARTER NO.1 RESISTOR TO DIAGNOSTIC
516
GN
BLOWER MOTOR (MEDIUM)
304
WH
STARTER RELAY NO.1 OUTPUT
517
BU
BLOWER MOTOR (LO)
306
GN
STARTER RELAY COIL TO NEUT START SW OR KEY SW
521
YL
A/C SW TO REFRIGERANT SW
307
OR
KEY SW TO NEUT START SW OR VMIS SENSOR MODULE
522
WH
A/C CLUTCH TO THERMOSTAT SW
308
YL
MAIN POWER RELAY COIL
523
BR
WIPER - LEFT (PARK)
310
PU
START AID SW TO START AID SOL
524
BU
WIPER - LEFT (LO)
311
WH
START AID SOL TO TEMP SW
525
GY
WIPER. LEFT (HI)
321
BR
BCKP ALARM LAMP TRAVEL ALARM
526
YL
WIPER - RIGHT (PARK)
322
GY
WARNING HORN (FORWARD)
527
GN
WIPER. RIGHT (LO)
PK
WIPER - RIGHT (HI)
GN
Monitoring Circuits ALTERNATOR (R)TERM.
528
403
600
BR
DASH LAMP BASIC
404
YL
OPR MON HYD OIL TEMP
608
GN
FLOOD LAMP - REAR
405
GY
OPR MON OIL PRESS. (LO SETTING)
609
YL
FLOOD LAMP - SIDE
406
PU
OPR MON COOLANT TEMP
610
OR
HEAD LAMP BASIC
410
WH
OPR MON FAULT ALARM
779
WH
COUPLER ENGAGE SOL
411
PK
OPR MON MASTER FAULT LAMP
780
PU
COUPLER DISENGAGE SOL
412
BU
OPR MON COOLANT FLOW
978
GN
CST AUTOSHIFT - SLOW MODE SW 1
413
BR
OPR MON FUEL PRESS.
987
WH
DIVERTER SOL
6 Contacts
Machine Location Harness And/Or Components A - 6Y-4522 Diagnostic Connector E A - 6Y-4522 Operator Monitor (EMS) * A - 6Y-4522 B - 127-5121 B A - 6Y-4522 UU - 129-6268 B B - 127-5121 UU - 129-6268 B MM - 127-5120 NN - 9U-9463 1 MM - 127-5120 NN - 9U-9463 1 MM - 127-5120 Radio * A - 6Y-4522 C - 8E-0599 2 A - 6Y-4522 C - 8E-0599 2 A - 6Y -4522 A - 6Y-4522 3 A - 6Y-4522 Voltage Converter *
Schematic Location F-8 C-6
Connectors 6 Contacts 5 Contacts
E-4 E-4 E-5 C-7 C-8 A-5
4 Contacts
C-2 C-2 F-4 F-4
Machine Location Harness And/Or Components K - 120-6547 Prelube Timer/Solenoid * A - 6Y-4522 E - 6Y-4523 D A - 6Y-4522 M - 61-8611 B A - 6Y-4522 B - 127-5121 B A - 6Y-4522 H - 9N-4596 4 A - 6Y-4522 N - 9W-1816 B A - 6Y-4522 MM - 127-5120 B A - 6Y-4522 Ripper Pin Puller Solenoid * MM - 127-5120 Left Wiper Motor * MM - 127-5120 Front Wiper Motor * MM - 127-5120 Right Wiper Motor * NN - 9U-9463 Rear Wiper Motor *
Schematic Location
Harness And Wire Electrical Schematic Symbols
Electrical Schematic Symbols And Definitions
D-2
A
C-5 E-7
T
Pressure Symbol
Temperature Symbol
Level Symbol
Flow Symbol
2
Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.
E-4
Pin or Socket Number
E-4 C-9 E-5
Wire, Cable, or Harness Assembly Identification
Normally open switch that will close with an increase of a specific condition (temp-press-etc.). Single Wire Connector
B-4 B-6
Component Part Number
Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition.
C
A
A 325-PK-14
AA 1
D-8
9X-1123 325-PK-14
Wire Color
Socket
Normally closed switch that will open with an increase of a specific condition.
B = Components located in dash D = Components located in operator's right console
2
E = Components located on relay panel
Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition. OFF MACHINE SWITCH SPECIFICATIONS Part No.
Function
3E-2030
Engine Coolant Flow (EMS)
3T-5825
Power Train Oil Temp (EMS)
6T-4949
Engine Oil Pressure (EMS)
7N-9785
Engine Coolant Temp (EMS)
8C-3569
Hydraulic Oil Filter Temp (EMS) Engine Coolant Temp (St Aid)
8N-2248
Hydraulic Oil Temp (EMS)
9G-3341
Power Train Oil Filter Temp (EMS)
9W-3187 Fuel Pressure (EMS) Hydraulic Oil Filter/ 9X-7781 Power Train Filter Pressure (EMS)
114-5334 Refrigerant Pressure (AC)
Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
Receptacle
Plug
1 2
1 2
A-5
Pin
* = Connector is located at the component.
105-9152 Oil Pressure (Atch)
AA 1
A-7
Machine locations are repeated for connectors located close together.
8N-1693
Printed in U.S.A.
© 1995 Caterpillar All Rights Reserved
Actuate 362 ± 29 mN (1.3 ± 0.1 oz) 129.4 ± 2.8°C (265.0 ± 5.0°F) 93.0 ± 21.0 kPa (13.5 ± 3.0 psi) 107.2 ± 2.8°C (225.0 ± 5.0°F) 37.8 ± 2.8°C (100.0 ± 5.0°F)
Deactuate 303 mN MIN (1.1 oz MIN) 118.3°C (245.0°F) 69.0 ± 21.0 kPa (10.0 ± 3.0 psi) 91.0°C MIN (196.0°F MIN) 26.7°C MIN (81.0°F)
Normal Condition Normally Open Normally Closed Normally Open Normally Closed Normally Closed
37.8 ± 2.8°C (100.0± 5.0°F)
26.7°C MIN (80.0°F)
Normally Closed
101.7 ± 2.8°C (215.0 ± 5.0°F) 51.7±2.8°C (125.0± 5.0°F) 93.0 ± 21.0 kPa (13.5 ± 3.0 psi) 210 ± 70 kPa (30± 10 psi) 30 ± 7 kPa (4.3± 1.0 psi) 275 to 1750 kPa¹ (40 to 255 psi)
93.3°C MIN (200.0°F MIN) 43.0°C MIN (110.0°F MIN) 69.0 ± 21.0 kPa (10.0± 3.0 psi) _ -30± 7 kPa (4.3 ± 1.0 psi) _ --
Normally Closed Normally Closed Normally Closed Normally Open Normally Closed Normally Open ²
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.
200-BK-14
Circuit Number Identification
Wire Gauge
Electrical Schematic Symbols And Definitions
The circle indicates that the component has screw terminals and a wire can be disconnected from it.
FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it.
No circle indicates that the wire cannot be disconnected from the component.
This indicates that the component has a wire connected to it that is connected to ground.
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.
T
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. CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too much current flows through it. This does not destroy the circuit breaker and it can be reset to become part of the circuit again. 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. MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is activated by electricity and held latch 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.