Cat Electrical 992C Wheel Loader Electrical System Schematic Manual - PDF DOWNLOAD

Page 1

Wire Number

Wire Color

101

RD

Description

Wire Number

Wire Color

414

PK

Power Circuits

22 28

4

23 8

15

1

27

25 26

6

12

36 1

14 19 34

17 42

29 13

32

38

B

A

7

11

35

2

D

4

5

30 31

3

C 2

3

21 33

9

37

6

24

7

10

40

18 20

39 16

8

5 41

BATTERY

Description Monitoring Circuits (Continued)

BU

HEAD LAMP

415

GN

OPR MON TEST SW

105

BR

KEY SW

417

GY

PRIMARY STER SW

106

WH

AUX CKT

419

YL

OPR MON PARKING BRAKE

107

WH

ENG SHUT-DOWN/AUTO FIRE SUPPR CONT

426

BR

OPR MON POWER TRAIN OIL FILTER

109

OR

ALTERNATOR OUTPUT (+) TERM.

432

PK

OPR MON BRAKE PRESS. (OIL)

112

PU

MAIN POWER RELAY OUTPUT

441

OR

ENG COOLANT TEMP GAGE

113

OR

OPR MON PANEL/VMIS B+ SWITCHED

442

GY

HYD SYSTEM TEMP GAGE

114

GN

WARNING HORN (FORWARD)

443

YL

POWER TRAIN TEMP GAGE

115

PK

AUX CKT

452

PU

TORQUE CONVERTER

118

GY

AUX CKT

119

PK

AUX CKT

500

BR

WIPER - FRONT (PARK)

120

YL

AUX CKT

501

GN

WIPER - FRONT (LO)

121

YL

BACKUP ALARM/LAMP

502

OR

WIPER - FRONT (HI)

123

WH

AUX CKT

503

BR

WIPER - REAR (PARK)

124

GN

A/C

504

YL

WIPER - REAR (LO)

127

OR

AUX CKT

505

BU

WIPER - REAR (HI)

128

PK

AUX CKT

506

PU

WASHER - FRONT

129

BU

AUX CKT

507

WH

WASHER - REAR

130

GN

AUX CKT

513

OR

A/C COMPRESSOR/REFRIGERANT PRESS. SW

131

BR

AUX CKT

515

GY

BLOWER MOTOR (HI)

516

GN

BLOWER MOTOR (MEDIUM)

200

BK

MAIN CHASSIS

517

BU

BLOWER MOTOR (LO)

201

BK

OPR MON PANEL/VMIS/CMS

519

PK

THERMOSTAT TO REFRIGERANT PRESS. SW

203

BK

CHASSIS DIAGNOSTIC

520

WH

OPR A/C SW TO THERMOSTAT/FUSE

207

BK

STARTER DIAGNOSTIC

533

OR

FIRE SUPPR HEAT SENSOR/TEST SW

209

BK

FIRE SUPP SYSTEM GROUND

534

WH

FIRE SUPPR HEAT SENSOR/TEST SW

BR

DASH LAMP BASIC

OR

STOP LAMP

B

33 34

10

32

22 28

35 17 15

25 42

2

27

26

1

8

19 3

C

2

6

38

30 31 21

23

D 6

7

14

36

7

8

9

37

11 12

3

29 13 4

41

5

STARTER NO. 1 RESISTOR TO DIAGNOSTIC

600

304

WH

STARTER RELAY NO. 1 OUTPUT

604

306

GN

STARTER RELAY COIL TO NEUT START SW

607

PK

FLOOD LAMP- FRONT

610

OR

HEAD LAMP BASIC

OR KEY SW

24

40

18 20

1

16 39

4 5

OR

308

YL

MAIN POWER RELAY COIL

615

YL

CAB FLOOD LAMP/ROPS

310

PU

START AID SW TO START AID SOL

616

BU

BUCKET FLOOD LAMP/BOOM FLOOD LAMP

311

WH

START AID SOL TO TEMP SW

313

GY

STARTER NO. 2 RESISTOR TO DIAGNOSTIC

736

YL

SWITCHING GEAR CODE 4 FRONT

VEHICLE HARNESS CONNECTOR AND COMPONENT LOCATIONS

314

PU

STARTER RELAY NO. 2 OUTPUT

761

GY

LIFT KICKOUT SOL SW

321

BR

BACKUP ALARM/LAMP/TRAVEL ALARM

762

YL

BUCKET POSITIONER SOL SW

322

GY

WARNING HORN (FORWARD)

763

BU

TORQUE CONVERTER SW

326

PU

KEY SW “C” TERM.

803

BU

AUTO FIRE SUPPR SYSTEM SW POWER

327

PK

SHUTDOWN SOL

805

PK

AUTO FIRE SUPPR BRAKE SW

328

OR

SHUTDOWN MODULE “OFF”

807

BR

AUTO FIRE SUPPR NITROGEN SW TO CONT

808

PU

AUTO FIRE SUPPR NITROGEN SW TO

GN

AUTO FIRE SUPPR SYSTEM WARNING CKT

Machine Location 1

Component Alarm - Backup

Schematic Location D-12

Machine Location A

400

GN

SERVICE METER SW

403

GN

ALTERNATOR (R) TERM.

809

Component Solenoid - Nitrogen Actuator (Fire Supp)

Schematic Location F-3

404

YL

OPR MON HYD OIL TEMP

810

BU

AUTO FIRE SUPPR SYSTEM FAILURE CKT

405

GY

OPR MON OIL PRESS. (LO SETTING)

811

GY

AUTO FIRE SUPPR TEST CKT

406

PU

OPR MON COOLANT TEMP

812

GN

AUTO FIRE SUPPR NITROGEN ACTUATOR SOL

407

PK

OPR MON CONVERTER/RETARDER OIL TEMP

813

PK

AUTO FIRE SUPPR AGENT CYLINDER SW TO

409

OR

OPR MON NEUT

410

WH

OPR MON FAULT ALARM

814

YL

AUTO FIRE SUPPR AGENT SW TO AGENT SW

411

PK

OPR MON MASTER FAULT LAMP

816

BR

AUTO FIRE SUPPR ALARM

412

BU

OPR MON COOLANT FLOW

413

BR

OPR MON FUEL PRESS.

Connectors

Vehicle Location

F-11

*

Y-6W7257 Fire Detect Switch

C-9

C-8V1635 Diagnostic Connector

A-10

*

Y-6W7257 Fire Detect Switch

D-9

D-11

*

A-7

*

B-10

5

Alarm - Fire

F-2

23

Switch - Agent (Fire Supp)

F-11

3

Alternator

C-11

A

Switch - Aux Flood Lamp

E-5

4

Batteries

F-12

D

Switch - Backup Alarm

C-8

5

Batteries

A-12

A

Switch - Blower

D-5

C

Breaker - Alternator (80 Amp)

A-11

D

Switch - Brake (EMS)

F-8

B

Breaker - Blower Motor (10 Amp)

B-4

24

Switch - Bucket Positioner

B-1

*

C

Breaker - Key (10 Amp)

B-11

B

Switch - Cab Flood Lamp

F-5

3

C

Breaker - Main (80 Amp)

B-11

D

Switch - Converter Temp (EMS)

D-10

B

Breaker - Rear Wiper (3 Amp)

B-5

25

Switch - Coolant Flow (EMS)

E-11

B-11

26

Switch - Coolant Temp (EMS)

B-10

Breaker - Shutdown (15 Amp)

A-11

27

Switch - Coolant Temp (Start Aid)

B-10

C

Connector - Diagnostic

A-10

28

Switch - Discharge (Fire Supp)

F-10

C

Control - Engine Shutdown

A-11

29

Switch - Disconnect

C-11

6

Control - Fire Suppression

F-11

30

Switch - Engine Oil (EMS)

D-11

7

Controls - Kickout

A-9

31

Switch - Engine Oil (Service Meter)

D-11

A

Converter - Voltage

B-4

32

Switch - Fire Detection

C-9

B

Fuse - Holder

B-5

D

Switch - Fire Detection

D-9

B

Gauge - Converter Temp

E-5

33

Switch - Fire Detection

E-9

B

Gauge - Engine Coolant Temp

E-5

34

Switch - Fire Detection

E-11

B

Gauge - Hydraulic Temp

E-5

35

Switch - Fire Detection

C-11

8

Horn - Forward

B-2

36

Switch - Fire Detection

B-11

*

1 2 4 5

10 Contacts

5 4 1

9 Contacts

1 4 6

9

Horn - Forward

F-2

B

Switch - Flood Lamp

F-5

B

Lamp - Master Fault (EMS)

E-4

A

Switch - Forward Horn

D-4

B

Meter - Service

E-4

B

Switch - Front Wiper

D-4

B

Monitor - Fire Control

F-3

37

Switch - Fuel Level (EMS)

F-7

B

Monitor - Operator (EMS)

B-5

38

Switch - Fuel Pressure (EMS)

D-10

7

A

Motor - Blower (Heater and A/bs/C)

D-6

A

Switch - Heater

A-3

7

A

Motor - Floor Heater

A-2

39

Switch - Hydraulic Temp (EMS)

A-8

10

Motor - Front Washer

F-6

B

Switch - Key Start

D-5 C-1

A

Motor - Front Wiper

D-4

40

Switch - Lift Kickout

10

Motor - Rear Washer

E-6

A

Switch - Nitrogen Actuator (Fire Supp)

F-3

A

Motor - Rear Wiper

F-6

41

Switch - Nitrogen Actuator (Fire Supp)

F-10

11

Motor - Starter

E-10

B

Switch - Operator Monitor (EMS) Test

C-5

12

Motor - Starter

C-10

D

Switch - Parking Brake (EMS)

F-8

13

Receptacle - Aux Start

B-11

D

Switch - Parking Brake (Fire Supp)

F-9

C

Relay - Main

B-10

B

Switch - Rear Wiper

D-4

C

Relay - Start

A-10

42

Switch - Refrigerant A/C

B-11

C

Relay - Start

A-10

B

Switch - Running Lamp

F-5

14

Resistor - Starter/Diagnostic Conn

E-11

B

Switch - Start Aid

C-5

D

Sender - Converter Temp (Gauge)

D-11

B

Switch - Steering

B-9

15

Sender - Coolant Temp (Gauge)

C-10

D

Switch - Stop Lamp (EMS)

F-8

16

Sender - Hydraulic Temp (Gauge)

A-8

A

Switch - Thermostat

D-6

17

Solenoid - A/C Clutch

B-11

A

Switch - Torque Converter

A-4

18

Solenoid - Bucket Positioner

A-6

D

Switch - Transmission (EMS)

D-8

0

Solenoid - Converter

D-10

D

Switch - Transmission Filter Bypass (EMS)

D-8

19

Solenoid - Engine Shutdown

C-11

A

Switch - Transmission Neutral

C-8

20

Solenoid - Lift Kickout

A-5

Machine locations are repeated for components located close together. A = Components in operator's compartment C = Components located on relay panel D = Components located under platform B = Components in operator's compartment - Dash

7 Contacts

* *

Fire Supp. Agent (Pressure)

2270 kPa Max. (328.0 psi Max.)

1655 ± 138kPa (240.5 ± 20.0 psi)

N.O.

MAX HYD 3103kPa (MAX BYPASS SPOOL)

FORCE 66.7 N (MAX ACT 8.9 N)

N.O.

N.O.

3T9343

Power Train Filter Pressure (EMS)

6T6085

Fire Supp. Nitrogen Actuator (Press.)

1930 ± 138kPa (279.5 ± 20.0 psi)

1655 ± 138kPa (240.5 ± 20.0 psi)

N.O.

7N9560

Power Train Oil Temperature (EMS)

129.4 ± 2.8°C (265 ± 5°F)

118.3°C MIN (245°F MIN)

N.C.

7N9785

Engine Coolant Temperature (EMS)

107.2 ± 2.8°C (225 ± 5°F)

91 .0°C MIN (1 96°F MIN)

N.C.

7T2074

Steering (EMS)

11 L/min Max (25.4 mm ID line) [2.9 gal/min MAX (1.0 in. ID line)]

4.9 L/min MIN (25.4 mm ID line) [1.3 gal/min MIN (1.0 in. ID line)]

N.C.

7T4371

Fire Suppression Discharge Pressure

93 ± 21 kPa (13.5 ± 3.0 psi)

69 ± 21 kPa (10.0 ± 3.0 psi)

N.O.

7T4785

Fire Suppression Temperature

193.3 ± 8°C (380 ± 15°F)

8N1 693

Engine Coolant Temperature (Start Aid)

37.8 ± 2.8°C (100 ± 5°F)

26.7°C MIN (80°F MIN)

N.C.

8N2248

Hydraulic Oil Temperature (EMS)

101.7 ± 2.8°C (215 ± 5°F)

93.3°C MIN (200°F MIN)

N.C.

9G3341

Power Train Oil Temp. (Filter) (EMS)

51.7 ± 2.8°C (125 ± 5°F)

43.0°C MIN (110°F MIN)

N.C.

9W2343

Engine Coolant Flow (EMS)

37 ± 3g (1.3 ± 0.1 oz)

31gMIN (1.1 oz MIN)

N.O.

9W2653

Brake Pressure (EMS) (Fire Supp)

(1200 psi MAX) 8270 kPa MAX

(1000 ± 50.0 psi) 6890 ± 345 kPa

N.C.

9W3187

Fuel Pressure (EMS)

93 ± 21kPa (13.5 ± 3.0 psi)

69 ± 21kPa (10.0 ± 3.0 psi)

N.C.

N.O. = NORMALLY OPEN

-

N.O.

N.C. = NORMALLY CLOSED

F-8Vl6l9 N-8V1618 A-9V4483 N-8V1618 C-8V1635 N-8V1618 A-9V4483 K-7V9818 A-9V4483 D-7V9513 A-9V4483 G-7V9835 A-9V4483 K-7V9818 B-6W7259 M-6W7258 A-9V4483 H-9V4426 A-9V4483 K-7V9818 B-6W7259 Y - 6W7257 C-8V1635 Engine Shutdown Control M-6W7258 Fire Monitor Control N-8Vl6l8 XX-6W3354 N-9V4455 XX-6W3354

Printed in U.S.A.

F-3

6 Contacts

5 Contacts

4

B-3

5

C-3

4

E-3

*

C-7

8

C-6

*

E-3

4 Contacts

*

E-1

7

A-11

77

F-3

7

A-7

*

A-7

*

Vehicle locations are repeated for connectors located close together. * = Connector is located at component

Harness And Wire Electrical Schematic Symbols

N-8V1618 W-9C2169 Y-6W7257 Fire Detect Switch Y-6W7257 Fire Detect Switch

Schematic Location

B-6W7259 Fire Supp Control

A

Breaker - Running Lamps (10 Amp)

Harness And/Or Components

*

F-11

B

Vehicle Location

*

F-8

Switch - Agent (Fire Supp)

C

Connectors

B-5

2

Solenoid - Start Aid

22

12 Contacts

Schematic Location

*

25 Contacts

21

C-4

20 Contacts

Harness And/Or Components

A-11

1

C-12

Alarm - Fault (EMS)

69 ± 21 kPa (10.0 ± 3.0 psi)

Electrical Schematic Symbols And Definitions

B-7

37 Contacts

Alarm - Backup

93 ± 21 kPa (13.5 ± 3.0 psi)

© 1990 Caterpillar All Rights Reserved

7

2

Engine Oil Pressure (EMS) Engine Oil Pressure (S. Meter)

NITROGEN SW

A - 9V4483 N-8V1618 C - 8V1 635 F-8Vl619 A-9V4483 Operator Monitor (EMS)

A

Deactuate

NITROGEN SW

HARNESS CONNECTOR LOCATION CHART

Component Location

Normal Condition

Actuate

Control Circuits

Monitoring Circuits

C32237P1

992C Wheel Loader Electrical System

Function

49Z932-UP

Lighting Circuits

302

Part No.

3T9342

Accessory Circuits

Basic Machine Circuits

Off Vehicle Switch Specifications

3T4418

OPR MON LO FUEL

102

Ground Circuits

A

SENR4761 March 1990

Wire Description

Y-6W7257 Fire Detect Switch Y-6W7257 Fire Detect Switch K-7V9818 L-7V0007 J-3T2086 T-3T2087 A-9V4483 D-7V9513 A-9V4483 Not Used A-9V4483 Front Wiper Motor AA-9V0960 N-8Vl6l8 B-6W7259 Discharge Sw (Fire Supp) H-9V4426 Rear Wiper Motor N-8V1618 Not Used N-8V1618 V-6W0642 N-8V1618 U-8V1600 XX - 6W3354 Kickout Control XX - 6W3354 Kickout Control

A

AA

F-7

Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.

E-11 C-11

T

Pressure Symbol

Temperature Symbol

Level Symbol

Flow Symbol

Receptacle

Plug 2

E-5 D-6 B-3

Wire, Cable, or Harness Assembly Identification

Normally open switch that will close with an increase of a specific condition (temp-press-etc.).

E-11

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

Pin

D-8

AA 1

2

Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.

9X-1123 325-PK-14

Wire Color

Socket

Normally closed switch that will open with an increase of a specific condition.

F-10 F-6

Component Part Number

Single Wire Connector

F-2 D-4

Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.

Pin or Socket Number

E-9 B-11

1 2

1 2

1

200-BK-14

Circuit Number Identification

Wire Gauge

C-8 B-8 A-9

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.

A-9

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.


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