Cat 307 Excavator Electrical System Schematic Manual - PDF DOWNLOAD

SENR6219 JULY 1994

307 Excavator Electrical System 2WM1-UP

© 1994 Caterpillar All Rights Reserved

Printed in U.S.A.

9

8

7

6

5

4

3

2

1 FF

HEATER 118-1188

124-GN

L6

L6

C

320-OR 307-OR 306-GN

C

S

C

MOTOR

CONSOLE BOX

118-GY 500-BR 501-GN 103-YL 615-YL

200-BK 200-BK 200-BK 200-BK 200-BK 200-BK 200-BK 200-BK

200-BK 200-BK 200-BK 200-BK 200-BK 200-BK 200-BK 200-BK

200-BK 200-BK 200-BK 200-BK 2 1

L

C 200-BK 615-YL

200-BK

A A CONSOLE

200-BK-10 200-BK

L12

L14

519-PK

501-GN 118-GY 500-BR 200-BK 615-YL 200-BK

PK BK YL OR GY WH

L12

L12

L14

101-RD-6 109-OR-6

L5

L5

B

L M

RD/WH RD/GN RD/YL

ATCH CAB LAMP 3A-8951

C H J

POWER MODE CONT SW 5I-9858

CONN 33

ACTION ALARM 3E-6328

CONN 36

C

B965-GY D816-WH 142-BU

101-RD-8 109-OR-8

J RD/BU-18 RD-18 BK-18 WH-18 H J J CONN 41 CONN 40

142-BU

C

615-YL 200-BK

KNOB 105-9976

B

200-BK 200-BK 190-PK 113-OR 330-YL 403-GN 200-BK 142-BU 200-BK 101-RD-8 109-OR-8 129-BU 200-BK 200-BK 877-YL 112-PU-10 309-GY 101-RD-10 310-PU

D813-OR B786-BU D815-PU 113-OR 330-YL 403-GN 607-PK 406-PU 201-BK 405-GY 441-OR 442-GY 447-PK 200-BK B965-GY D816-WH 142-BU 101-RD-8 109-OR-8

1 2

B786-BU D815-PU D814-GY 113-OR 330-YL 403-GN 607-PK 200-BK 142-BU 200-BK 101-RD-8 109-OR-8 D814-GY 406-PU 201-BK 405-GY 441-OR 442-GY 447-PK B965-GY D816-WH

CONN 34

L M

310-PU 310-PU

E

C

CONN 32

RD BK

322-GY 190-PK 403-GN 309-GY D746-PK 321-BR 817-WH

CONN 31

16 ONE TOUCH LOW IDLE 10 + BATTERY 21 SAFETY RELAY 4 SERV METER 3 ILLUM 18 COOLANT TEMP SW.+ 17 COOLANT TEMP SW. 19 ENG OIL PRESS SW. 20 ENG OIL PRESS SW.+ 5 COOLANT TEMP SENDER 6 HYD OIL TEMP SENDER 7 FUEL TANK UNIT 8 GND 9 GND 15 CONT 2 ACTION ALARM + 1 ACTION ALARM 11 12 13 14

200-BK 200-BK 190-PK D814-GY D815-PU B786-BU D813-OR

616-BU 506-PU

C

CONN 28 C 310-PU 310-PU

6 2 1 5 7 3 4

307-OR

C

C

D815-PU 113-OR 330-YL 403-GN 607-PK 406-PU 201-BK 201-BK 405-GY 441-OR 442-GY 447-PK 200-BK 200-BK 200-BK 410-WH 201-BK

310-PU 112-PU-10 309-GY

ONE TOUCH LOW IDLE SW 105-9390

B965-GY

C

R2

R1

B

1 2 3 4 5 6

PREHEAT OFF ON START ACC

RD/WH

RD

BU BU/WH

BU/BK

WH/GN

115-PK 616-BU 607-PK

BR

307-OR 101-RD-10

CONTROLLER 102-8019

C 607-PK 607-PK

WORK MODE CONT SW 5I-9858

MONITOR 105-9970

1 2

118-GY 500-BR 118-GY 501-GN 115-PK

D ABBREV

L4

L4

C 109-OR-6

109-OR-6

101-RD-6

101-RD-6

A

C 60A

A

F CONN 38 G

ALT BREAKER 9S-0174

RD WH OR YL PK BK GY PU BR GN BU

L11

L3

L2

L3

L2

1 2 3 4 5 6 7 8 9 10

CIRCUIT CONNECTED

CONN 1

CIRCUIT NOT CONNECTED

D816-WH 321-BR

607-PK 322-GY 616-BU B965-GY

442-GY 447-PK

ELECTRICAL CONNECTION TO VEHICLE STRUCTURE INTERNAL ELECTRICAL CONNECTION TO SURFACE OF COMPONENT CONNECTOR

C

103-YL 200-BK

L9

L9

L8

L8 200-BK

CHASSIS

A

200-BK-6

200-BK-6 D746-PK 109-OR-6

A

A

327-PK-14 327-PK

2 1

A 403-GN B L ALTERNATOR PALT A 109-2362 E R 309-GY A

A ENG SHUTDOWN SOL

A

ATCH REFRIGERANT SW 114-5334 (NOTE A)

WASHER 096-0486

A 2 1

A CONN 57

513-OR

A 817-WH 200-BK

COOLANT TEMP SENDER 117-6399 A 441-OR

200-BK 200-BK 101-RD-6 304-WH-8 327-PK-14 L7 877-YL-8 200-BK-10 D746-PK 109-OR-6 403-GN 309-GY 441-OR 406-PU 405-GY 201-BK 200-BK 200-BK D814-GY 190-PK 817-WH ATCH TRAVEL PRESS. SW 102-8041

A

304-WH-8 101-RD-6

A S A

201-BK

406-PU

1 2 CONN 54

A

A

BK-18

L2

L2

201-BK

616-BU 200-BK

322-GY

322-GY

AA

1 2 CONN 46

A B C D E F G H J K L

K (NOTE B) D RD-18 WH-18 E CONN 45

616-BU 200-BK

E

HYD OIL TEMP SENDER 096-4643

442-GY T

442-GY

321-BR 442-GY B965-GY D816-WH 447-PK 200-BK 200-BK 228-BK

321-BR D816-WH 200-BK B965-GY 200-BK 447-PK 228-BK

ATCH TRAVEL ALARM 3T-1444

BK/PK BK

B 1 2 CONN 52

321-BR 442-GY B965-GY D816-WH 447-PK 200-BK 607-PK 607-PK 200-BK

116-7795 C-4 116-7794 C-4 116-7778 C-4 111-4754 B-2 111-4755 B-2 102-7952 F-1 102-7953 D-9 105-9967 E-6 6C-8839 F-1 105-9946 B-2 111-4753 D-6

616-BU 200-BK

RD-18 WH-18 CONN 44

ATCH BOOM LAMP 105-9949

607-PK 200-BK

321-BR 200-BK

YL BK

B 1 2 CONN 49

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS ON.

D816-WH 200-BK

STARTING CIRCUIT.

CHASSIS

MONITORING CIRCUIT. B965-GY 200-BK

WIPER/WASHER CIRCUIT. HEATER AND AIR CONDITIONER CIRCUIT. GROUND CIRCUIT.

447-PK 228-BK CC

RD-0

RD-0

AA

BB

BK-0

DISCONNECT SW 7N-0718

THIS SCHEMATIC IS FOR THE 307 EXCAVATOR (113-6903).

COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF. UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.

ENGINE SHUTDOWN CIRCUIT.

NOTE A : NORMALLY OPEN BEFORE REFRIGERANT CHARGE.

AIR HEATER START AID CIRCUIT.

NOTE B : USE WITH OFFSET BOOM.

CONTROLLER CIRCUIT.

BK-0 POS NEG

ALL DASHED LINES ARE ATTACHMENTS.

DD CHASSIS

7

6

A-3 A-3 A-3 A-3 A-9 F-1

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS OFF.

RD-0

8

117-0416 102-7949 111-4740 111-4741 102-7951 1S-2342

CHASSIS LAMP 105-9949

B 1 2 CONN 50

AA BB CC DD EE FF

RD-18 WH-18 CONN 47

B 1 2 CONN 51

B CABLE AS.

B

L1

POS NEG

9

LOC

ATCH BOOM LAMP 105-9949

B

BATTERY 3T-5760 CHASSIS

K (NOTE B) D

B 616-BU 200-BK

E

FUEL SENSOR 7Y-3848

ENG

PART NO.

HARNESS AS.

HORN 096-1491

TRENCHING SOL 7I-2787

405-GY

STARTER 109-2361

BK-0

L3

C

ATCH WIRE, CABLE, COMPONENT CIRCUIT GROUPING DESIGNATION

B

ENG/PUMP CONT SOL 4I-5674

ENG OIL SW 3T-4418 BK-18

RD-0 EE

A

PRESS. SW 102-8041

T

BAT MOT

MOTOR

A

A

190-PK D814-GY

L3

L7

1 2 CONN 55

T COOLANT TEMP SW 085-5121

IDENT

506-PU

ATCH A/C CLUTCH SOL 101-1759

A

RESISTOR 5L-2854

MOTOR

L#

DOME LAMP 096-0721

G

BK-0

101-RD-6 304-WH-8 327-PK-14 877-YL-8

A

A

B

AIR HEATER 035-8059

A

519-PK

A CONN 56

101-RD-6 304-WH-8 327-PK-14 877-YL-8 200-BK-10 200-BK 200-BK D746-PK 109-OR-6 403-GN 309-GY 441-OR 406-PU 405-GY 201-BK

200-BK-10 200-BK 200-BK 200-BK-6 RESISTOR 7W-1251

1 2

G

321-BR 442-GY B965-GY D816-WH 447-PK 607-PK 322-GY 616-BU

200-BK

200-BK

200-BK

200-BK

200-BK A

200-BK 118-GY 500-BR 501-GN 200-BK 615-YL 200-BK

CONSOLE BOX L7

CONSOLE BOX

CONSOLE BOX

DESCRIPTION

BLADE, SPADE, RING, OR SCREW TERMINAL

B

D746-PK 403-GN 309-GY 441-OR 406-PU 405-GY 201-BK D814-GY 817-WH 190-PK

A

506-PU 327-PK-14

200-BK-10 877-YL-8 304-WH-8 101-RD-6 109-OR-6

A

COLOR RED WHITE ORANGE YELLOW PINK BLACK GRAY PURPLE BROWN GREEN BLUE

SYMBOL

C

1 2 3 4 5 6 7 8 9 10

C

1 2 3

C

L11

L10 L10

L9 L8

CONN 2

CONN 3

RD-18 WH-18

KNOB 105-9976

L9 L8

CONN 5

304-WH-8 877-YL-8 200-BK-10

SWITCH AS 7X-6387

CONN 29

C

321-BR 817-WH 322-GY 190-PK 403-GN 309-GY D746-PK 200-BK 200-BK 190-PK 113-OR 330-YL 403-GN 200-BK 142-BU 200-BK 101-RD-8 109-OR-8 129-BU 200-BK 200-BK 877-YL 112-PU-10 309-GY 310-PU 101-RD-10

114-GN 320-OR 322-GY

101-RD-14

799-WH 200-BK 127-OR 615-YL 118-GY 500-BR 118-GY 501-GN 115-PK 200-BK 306-GN 320-OR

J

J CONN 43

501-GN 118-GY 500-BR 200-BK 200-BK 615-YL 200-BK

120-YL

C

RD/BU-18 BK-18

H J CONN 42

RD/WH RD/GN RD/YL

120-YL 200-BK

HORN RELAY C 094-4522

C

D813-OR B786-BU

GROUND + BATTERY BK-18 RD-18 2 1

+12 VOLT GROUND OR-18 BK-18

CONN 60

CONN 6

H

L13

C

ATCH CAB LAMP 3A-8951 H J

817-WH 321-BR 506-PU D746-PK 403-GN 309-GY 322-GY 616-BU 190-PK 607-PK D814-GY 441-OR 406-PU 405-GY 201-BK 442-GY 447-PK B965-GY D816-WH

D

C 118-GY 500-BR 501-GN 103-YL 200-BK

L13

HEATER RELAY 085-5353

320-OR 114-GN 114-GN 114-GN 322-GY

C

327-PK-14

1 2 3 5 4

101-RD-10 101-RD-8

CIGAR LIGHTER 9W-0335

C C

CONN 18

L

L G

A

ATCH CONVERTER 7T-8000

3 1 2

210-BK 135-BU

CONN 61

877-YL 310-PU

C CONN 10

TO RADIO

CABLE 093-2060

109-OR-8 A

CONN 24

327-PK

200-BK

SAFETY RELAY 094-2080

START RELAY 085-5200 306-GN

877-YL-8

GROUND ATCH ANTENNA 7Y-5435

330-YL

CONN 23

ENG GOV ACTR 102-8007

M

129-BU 200-BK 200-BK 877-YL

BK

YL

321-BR 817-WH 799-WH 330-YL 403-GN 403-GN 309-GY 309-GY D746-PK 306-GN 109-OR-8 877-YL 310-PU 101-RD-10 101-RD-8 103-YL 118-GY 500-BR 501-GN 615-YL

CONN 22

C

F

KEY START SW 7Y-3918

200-BK-10 877-YL-8 304-WH-8 101-RD-6 109-OR-6

WH/YL

330-YL 330-YL 403-GN 403-GN 309-GY 309-GY D746-PK

R WH/GN P

CAB LAMP

120-YL 304-WH-8

E

127-OR

CONN 20

KNOB 7Y-9390

C

F CONN 39

GLOW IND 085-5321

877-YL

200-BK 306-GN 320-OR 307-OR

S WH/BU L

10A

SOLENOID

121-YL 321-BR 817-WH 799-WH 200-BK

2 5 3 1 4 CONN 11

+ BATTERY ALARM PRESS. CANCEL GND

142-BU

CONN 19

WIPER SW 094-1423

500-BR 118-GY 118-GY 501-GN

C

10A

112-PU-10 127-OR 118-GY 115-PK 190-PK 190-PK 113-OR 129-BU 142-BU 103-YL 114-GN

MONITOR CIGAR LIGHTER TRAVEL ALARM

WH

112-PU-14 ATCH TRAVEL ALARM TIMER 9G-7410

10A

113-OR 129-BU 121-YL

WASHER SW 094-1424

200-BK

LIGHT SW (BOOM/ CHASSIS LAMP) 094-1422

118-GY 118-GY 506-PU

10A

RD/WH

112-PU-14

RD

15A

FUSE 15A 9W-1441 10A 9W-1442

ATCH LIGHT SW (CAB LAMP) 094-1422

127-OR 615-YL

10A

WH/GN

101-RD-14

ATCH TRAVEL ALARM CANCEL SW 111-4715

WH

112-PU-14

A/C A HEATER124-GN RADIO L WASHER/WIPER LAMP(CHASSIS/BOOM) ENG GOV CONT ENG GOV CONT HORN DOME LAMP

799-WH 200-BK

112-PU-10

124-GN-14 120-YL 118-GY 115-PK 190-PK 190-PK 114-GN 103-YL

112-PU-10

15A 10A 10A 15A 15A

WIPER

-

+1

112-PU-10

112-PU-14

PLATFORM

307-OR 306-GN

CONSOLE BOX

CONSOLE BOX

F

200-BK 320-OR 307-OR 306-GN

200-BK 519-PK

L16

CONN 30 C

200-BK

CHASSIS

NEUTRAL START SW 9W-2150

+

ATCH A/C UNIT 118-1189

HORN SW 4I-9968

BU/WH BU BU/BK BK

A CONN 26

4

5

4

3

2

1

A