SENR5080
AUGUST 2000
3512B Oil Well Servicing Engine
Electrical System
2AF1-UP
©
2000 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 specificcondition (temp-press-etc.).
The circle indicates that the componenthas 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.
A
Aftercooler Temperature Sensor
View of Area A
Coolant Temperature Sensor
Crankcase Pressure Sensor
Primary Engine Speed/Timing Sensor
Secondary Engine Speed/Timing Sensor
Left Exhaust Temperature Sensor
Left Side View
A
A
VIEW A-A
Right Exhaust Temperature Sensor
Unfiltered Engine
Oil Pressure
Sensor
Filtered Engine
Oil Pressure
Sensor
Unfiltered Fuel
Pressure Sensor
Filtered Fuel
Pressure Sensor
Right Side View
Turbocharger Compressor Outlet
Pressure Sensor
Atmospheric
Pressure
Sensor
Electronic
Control Module
Front View
Left Air Shutoff Valve
Right Air Shutoff Valve
Left Turbocharger Compressor
Inlet Pressure Sensor
Inlet Pressure Sensor
Right Turbocharger Compressor
Rear View
Air Inlet
Temperature Sensor
L1
F718-BU
F718-BU
229-BK
229-BK
229-BK
113-OR
229-BK
229-BK
150-OR
150-OR
150-OR
150-OR
229-BK
229-BK
229-BK
150-OR
998-BR
150-OR
150-OR
229-BK
229-BK
229-BK
229-BK
229-BK
229-BK
229-BK
229-BK
150-OR
150-OR-10
150-OR
150-OR
150-OR
150-OR
SPEED ADJUST
POT (1K OHM)
10 TURN
122-9458
3
2
1
150-OR
2 3
1
CRANK ENABLE SWITCH
(MOMENTARY)
8N0694
150-OR
F702-GN
ENGINE SPEED
CONTROL
150-OR
998-BR
-B S D +B
1 2 3
SPEED CONTROL
9X-9591
150-OR-10
150-OR
150-OR
1 2
FUEL CUTOUT
19
20
15
11
38
22
04
29
39
30
25
33
28
37
36
26
23
24
40
21
18
27
31
32
09
17
16
14
10
08
05
35
34
02
01
03
07
06
13
ETHER SOLENOID (+)
12
BATTERY (+)
BATTERY (-)
150-OR
STARTER SOLENOID (+)
ETHER SOLENOID (-)
STARTER SOLENOID (-)
PRELUBE OVERRIDE
4D1836
32
PRELUBE PUMP MOTOR-10 (+)
PRELUBE PUMP MOTOR-10 (-)
F717-YL
F716-WH
ETHER RELAY
9Y2921
8586
87a
30
2 3
1
STARTING AID SWITCH
8N-0694 MOMENTARY
F720-PU
NOTE A
REMOTE AIR SHUTOFF ACTUATION
TORQUE LIMIT/FUEL POSITION MULTIPLIER
G971-BR
G746-WH
87
2 3
A249-BK
ENGINE PROT OVERRIDE
4D1836
GENERAL
ALARM RELAY
9Y2921
8586
87
30
HSDL SHIELD GROUND
SHUTDOWN NOTIFY RELAY-NORMALLY OPEN
SHUTDOWN NOTIFY RELAY-NORMALLY CLOSED
SHUTDOWN NOTIFY RELAY - COMMON
GENERAL ALARM RELAY - COMMON
GENERAL ALARM RELAY-NORMALLY CLOSED
ENGINE OIL TEMP (RETURN)
GENERAL ALARM RELAY-NORMALLY OPEN
87a
D839-YL
200-BK
200-BK
B472-YL
ENGINE SPEED -SH
ENGINE SPEED -C
ENGINE SPEED -B
CAN DATALINK (-)
CAN DATALINK (+)
ENGINE OIL TEMP (SIGNAL)
87a
30
87
86
F719-BR
F716-PU
F701-BR
998-BR
F710-GN
F710-GN
N917-RD
F706-PU
998-BR
998-BR
998-BR
L4
SPD1-BK
SPDS-SH
L3
SPD2-CL
F712-GY
J782-GN
F702-GN
85
LOAD FEEDBACK SIGNAL
PRIMARY CAT DATALINK (+)
PRIMARY CAT DATALINK (-)
SECONDARY CAT DATALINK (+)
SECONDARY CAT DATALINK (-)
F711-GN
L5
L5
L3
L4
L4
L3
L5
L1
F718-BU
L2
L1
L2
L5
F705-PK
A268-BK
L3
L4
J982-OR
J981-WH
893-GN
J982-OR
J981-WH
229-BK-14
INLET AIR TEMP (RETURN)
893-GN
SPD1-BK
SPDS-SH
N917-RD
OVERSPEED VERIFY
7N8001
32
MAG RELAY
9X-8124
4
3
12
SHUTDOWN
NOTIFY RELAY
9Y2921
F710-GN
F720-PU
D839-YL
200-BK
PRELUBE
PRESSURE
SWITCH
150-1240
E798-PK
150-OR-14
EMERGENCY STOP
DIGITAL
REF
150-OR-14
SPD2-CL
2
2
150-OR
F712-GY
DIAGRAM-WIRING
(3500B WELL FRACTURING)
173-2866 EC01
A268-BK
150-OR
200-BK
F711-GN
113-OR
G721-GY
G971-BR
G746-WH
F706-PU
F717-YL
F716-WH
998-BR
F715-PU
F719-BR
J782-GN
F702-GN
F700-BU
F701-BR
B472-YL
1
892-BR
INLET AIR TEMP (SIGNAL)
A249-BK
XXXX-XX
CUSTOMER CONNECTOR
40 PIN
8T9834
892-BR
CUSTOMER CONNECTION
3500B OIL WELL SERVICING ENGINE
1
109-6507 SWITCH
111-1324 BLOCK
124-3176 COVER
229-BK
150-OR
8586
87a
8730
F705-PK
150-OR
PRELUBE RELAY
MASTER 3E-6477
229-BK-14
C465-OR-10
150-OR-10
PRELUBE RELAY
SLAVE 9X-8124
2 1
3
4
A
B
C
SPARE
SPARE
D
BK-18
WH-18
TIMING
CALI-
BRATION
9X-5392
L18
L17
F720-PU
F710-GN
G721-GY
A
B
C
C
B
A
9X-1343
ENGINE HARNESS WIRING
(C)
+V ANALOG
SIGNAL
ANALOG RET
DIGITAL RET
SIGNAL
+V SPD/TIM
+V ANALOG
SIGNAL
ANALOG RET
ANALOG RET
SIGNAL
+V ANALOG
+V ANALOG
SIGNAL
ANALOG RET
TURBO
OUTLET
PRESSURE
SENSOR
163-8522
LEFT
TURBO
INLET
PRESSURE
SENSOR
163-8492
RIGHT
TURBO
INLET
PRESSURE
SENSOR
163-8492
ENGINE
OIL
PRESSURE
SENSOR
UNFILTD
163-8523
ENGINE
COOLANT
TEMP
SENSOR
102-7532
ENGINE
SPEED/
TIMING
SENSOR
102-9029
ANALOG RET
SIGNAL
+V ANALOG
+V ANALOG
SIGNAL
ANALOG RET
ATMOS
PRESSURE
SENSOR
163-8492
L9
L2
L6
FUEL
FILTER
PRESSURE
SENSOR
FILTD
163-8523
ANALOG RET
SIGNAL
+V ANALOG
G746-WH
TORQUE LIMIT
L8
L7
L7
ANALOG RET
SIGNAL
+V ANALOG
L3
+V DIGITAL
SIGNAL
DIGITAL RET
TURBO
EXHAUST
TEMP RH
164-2441
TURBO
EXHAUST
TEMP LH
164-2441
DIGITAL RET
SIGNAL
+V DIGTAL
+V ANALOG
SIGNAL
ANALOG RET
AFTER
COOLER
TEMP
SENSOR
128-4347
L4
25
FUEL
FILTER
PRESSURE
SENSOR
UNFILTD
163-8523
CRANK
CASE
PRESSURE
SENSOR
163-8492
DIGITAL RET
SIGNAL
+V ANALOG
+V ANALOG
SIGNAL
ANALOG RET
ENGINE
OIL
PRESSURE
SENSOR
FILTD
163-8523
EMERGENCY OVERRIDE
200BK
200BK
L12
L11
L8
L2
L3
C-KEY
PLUG AS.
101-0204
HSDL SHIELD GROUND
L6
A249-BK
L13
L4
15
L9
L12
L13
G746-WH
L8
L6
39
AIR SHUT-OFF
SOLENOID
152-2700
C
L7
L3
B
L16
L2
L4
A
ECS IN AUTO
+V SPD/TIM
SIGNAL
DIGITAL RET
SECONDARY
ENGINE
SPEED/
TIMING
SENSOR
102-9029
(H)
ENGINE SERVICE
CONNECTION 'H'
8T-8736
14-18 GA.
N917-RD
D839YL
200BK
B472YL
D839YL
N917-RD
200BK
OIL
TEMP
SENSOR
129-9191
AIR
INLET
TEMP
SENSOR
129-9191
1 SIGNAL
2 RETURN
F731-OR
F730-GY
F729-GN
F728-BR
F727-GN
F726-YL
A712-BR
A711-PU
A710-GY
A709-OR
A708-BR
A707-PU
A706-GY
A705-YL
A704-GN
A703-BR
A702-PU
A701-GY
SOL 14&16 RETURN
SOL 13&15 RETURN
SOL 10&12 RETURN
SOL 9&11 RETURN
SOL 6&8 RETURN
SOL 5&7 RETURN
SOL 2&4 RETURN
SOL 1&3 RETURN
SOLENOID 16 POWER
SOLENOID 15 POWER
SOLENOID 14 POWER
SOLENOID 13 POWER
SOLENOID 12 POWER
SOLENOID 11 POWER
SOLENOID 10 POWER
SOLENOID 9 POWER
SOLENOID 8 POWER
SOLENOID 7 POWER
SOLENOID 6 POWER
SOLENOID 5 POWER
SOLENOID 4 POWER
SOLENOID 3 POWER
SOLENOID 2 POWER
SOLENOID 1 POWER
L1
YL
YL
G770-WH
G769-PU
A716-PU
A715-GY
A714-PK
32
D-KEY
PLUG AS.
101-0205
16
40
26
34
28
38
22
37
18
31
12
30
06
10
05
11
17
21
33
39
04
27
36
2
1
2
1
1
2
2
1
1
2
2
1
1
2
2
1
1
2
WH-18
BK-18
OR-18
OR-18
A
B
C
F732-PK
A
B
C
A746-PK
F713-OR
F714-PK
997-OR
993-BR
997-OR
993-BR
997-OR
993-BR
993-BR
997-OR
997-OR
993-BR
995-BU
996-GN
998-BR
999-WH
996-GN
999-WH
A
B
C
A
B
C
A
B
C
A
B
OR-18
YL-18
GN-18
WH-18
BK-18
OR-18
OR-18
BK-18
WH-18
OR-18
YL-18
GN-18
C
GN-18
2
1
YL
YL
A713-GN
A716-PU
G770-WH
CYLINDER
HEAD
SOL 16
CYLINDER
HEAD
SOL 14
G770-WH
A714-PK
YL
YL
YL
YL
G769-PU
A715-GY
CYLINDER
HEAD
SOL 15
YL-18
OR-18
CYLINDER
HEAD
SOL 13
A713-GN
G769-PU
YL
YL
YL
YL
YL
YL
YL
A713-GN
G769-PU
A715-GY
YL
A716-PU
G770-WH
A702-PU
F727-GN
A747-GY
OR-18
YL-18
GN-18
C
B
A
993-BR
997-OR
A747-GY
F725-WH
GN-18
YL-18
OR-18
C
B
A
993-BR
997-OR
F725-WH
G971-BR
F701-BR
XXXX-XX
A746-PK
A747-GY
F713-OR
994-GY
F714-PK
F705-PK
F702-GN
A704-GN
PRIMARY THROTTLE
AFTERCOOLER TEMPERATURE SNSR
A751-YL
OIL PRESSURE SNSR - FILTERED
TURBO INLET LH PRESSURE SNSR
ATMOSPHERIC PRESSURE SNSR
TURBO OUTLET PRESSURE SNSR
START RELAY RETURN
13
03
02
08
14
20
23
07
19
TURBO INLET RH PRESSURE SNSR
AIR SHUTOFF
START ENABLE RELAY
A700-OR
998-BR
F723-PK
F724-PU
A751-YL
993-BR
997-OR
F704-OR
A700-OR
998-BR
BK-18
WH-18
998-BR
A700-OR
F703-GY
F737-YL
E795-YL
A746-PK
F713-OR
F714-PK
995-BU
997-OR
993-BR
F737-YL
997-OR
993-BR
A
B
C
OR-18
YL-18
GN-18
A751-YL
F724-PU
F723-PK
995-BU
COOLANT TEMPERATURE SNSR
A706-GY
09
24
01
29
35
F729-GN
A708-BR
A710-GY
F731-OR
15
A712-BR
A711-PU
F730-GY
A709-OR
A707-PU
F728-BR
A705-YL
YL
YL
YL
YL
A701-GY
F726-YL
F726-YL
A703-BR
C
B
A
993-BR
997-OR
E795-YL
997-OR
993-BR
A
B
C
OR-18
YL-18
GN-18
A705-YL
F728-BR
A268-BK
F737-YL
FUEL PRESSURE SNSR - UNFILTERED
F728-BR
A707-PU
A709-OR
F730-GY
F730-GY
A711-PU
A712-BR
F731-OR
F731-OR
A710-GY
CYLINDER
HEAD
SOL 11
CYLINDER
HEAD
SOL 9
CYLINDER
HEAD
SOL 7
CYLINDER
HEAD
SOL 5
CYLINDER
HEAD
SOL 3
L1
CYLINDER
HEAD
SOL 1
CYLINDER
HEAD
SOL 12
CYLINDER
HEAD
SOL 10
CYLINDER
HEAD
SOL 8
CYLINDER
HEAD
SOL 6
CYLINDER
HEAD
SOL 4
YL
YL
YL
YL
YL
YL
CYLINDER
HEAD
SOL 2
YL
YL
A714-PK
A703-BR
YL
YL
INJECTOR GP (16)
A708-BR
F729-GN
F729-GN
A706-GY
F726-YL
A704-GN
1
2
2
1
F727-GN
A701-GY
F727-GN
A702-PU
1
2
2
1
1
1
2
2
YL
YL
RECEPT AS. (16)
9X-0352
G971-BR
L1
F732-PK
1 SIGNAL
2 RETURN
996-GN
TURBO INLET EXH LH TEMP SENSR
E795-YL
996-GN
999-WH
892-BR
F700-BU
F719-BR
F718-BU
F723-PK
F724-PU
229-BK-14
229-BK-14
113-OR
CRANKCASE PRESSURE SENSOR
+V SPEED/TIMING
PRIMARY SPEED TIMING
GLOBAL CAT DATA LINK (-)
LOCAL CAT DATA LINK (+)
LOCAL CAT DATA LINK (-)
GENERAL ALARM
OVERSPEED VERIFY
ETHER RELAY
SECONDARY SPEED TIMING
ECM ON/OFF - KEYSWITCH INPUT
993-BR
997-OR
998-BR
F725-WH
F711-GN
F704-OR
E796-GN
F715-PU
J981-WH
A700-OR
E798-PK
J982-OR
893-GN
J782-GN
F717-YL
F716-WH
F706-PU
150-OR-14
150-OR-14
FUEL PRESSURE SNSR - FILTERED
CAN DATA LINK (+)
TURBO INLET EXH RH TEMP SENSR
OIL PRESSURE SNSR - UNFILTERED
ENGINE SHUTDOWN SIGNAL 'C' SW2
PRELUBE PRESSURE SWITCH
GLOBAL CAT DATA LINK (+)
DIG SNSR PWR (8V)
SHUTDOWN NOTIFY RELAY
TIMING CAL-FAN SPD(+)
TIMING CAL-FAN SPD(-)
LOAD FEED BACK
ETHER SWITCH
START/RUN/STOP2 SW4
BATTERY(-)
BATTERY(-)
BATTERY(+)
BATTERY(+)
ANA SNSR RETURN
34
START/RUN/STOP1 SW3
01
17
16
26
37
31
32
38
07
09
03
27
25
20
24
14
08
02
40
30
36
29
35
21
13
28
22
33
18
12
11
05
19
23
06
04
ANA SNSR PWR (5V)
DIG SNSR RETURN
ENGINE SHUTDOWN SIGNAL 'D' SW6
PRELUBE PUMP RETURN
ENGINE
SPEED
SENSOR
9X-5392
WH-18
F704-OR
F703-GY
A
PRELUBE PUMP DRIVE
B
C
C
B
A
OR-18
YL-18
GN-18
WH-18
BK-18
F712-GY
GN-18
YL-18
OR-18
CAN DATA LINK (-)
TWISTED PAIR
TWISTED PAIR
G971-BR
229-BK
A
B
C
A
B
J
H
J782-GN
D
B472-YL
200-BK
200-BK
D839-YL
F720-PU
F710-GN
A268-BK
F705-PK
F718-BU
F701-BR
G971-BR
J782-GN
SPD PWM 1B- (UNUSED)
OR-18
E796-GN
E796-GN
BK-18
F701-BR
F732-PK
998-BR
SPD1A-BK
SPD2A-CL
SPDSA-SH
10
SPDS-SH
SPDS-SH
J981-WH
994-GY
J982-OR
150-OR
229-BK
L1
F703-GY
998-BR
892-BR
893-GN
OR-18
BK-18
WH-18
994-GY
150-OR
229-BK
C
B
A
SPD2-CL
SPD2-CL
SPD1-BK
TWISTED SHEILDED
PAIR
N917-RD
N917-RD
SPDS-SH
A249-BK
A249-BK
G746-WH
F718-BU
L16
G746-WH
L13
L12
L9
G746-WH
A249-BK
G746-WH
L12
L13
L11
L9
L16
SPD2-CLSPD2-CL
SPD1-BK
L9
L12
L13
L16
N917-RD
TWISTED PAIR
TWISTED PAIR
E
L11
L11
L11
L17
XXXX-XX
229-BK
L18
150-OR
F712-GY
G971-BR
F711-GN
G971-BR
G971-BR
F711-GN
F712-GY
F712-GY
F711-GN
G721-GY
E798-PK
G721-GY
E798-PK
G721-GY
F711-GN
F712-GY
F716-WH
F717-YL
F706-PU
113-OR
113-OR
892-BR
893-GN
229-BK-14
F701-BR
F715-PU
150-OR-14
150-OR-14
F700-BU
F702-GN
229-BK-14
J981-WH
J982-OR
F711-GN
F712-GY
E798-PK
J782-GN
F719-BR
SPD1-BK
E798-PK
G721-GY
B472YL
Electronic Control Module
- 1 150-1240 SWITCH
- 1 124-3176 COVER
- 1 122-9458 POTENTIOMETER
- 1 111-1324 BLOCK
- 1 109-6507 SWITCH
- 2 9X-8124 SWITCH AS.
- 1 9Y-2921 RELAY
- 1 8T-9834 PLUG AS.
- 2 8N-0694 SWITCH AS.
- 2 4D-1836 SWITCH
- 1 152-2700 VALVE GP
- 1 9X-1343 RECEPTACLE AS.
- 1 8T-8736 RECEPTACLE
- 1 101-0204 PLUG AS.
- 1 101-0205 PLUG AS.
- 2 9X-5392 SENSOR GP
- 2 102-9029 SENSOR GP
- 2 164-2441 SENSOR GP
- 1 9X-0352 RECEPTACLE AS.
- 4 163-8492 SENSOR GP
- 1 128-4347 SENSOR GP
- 1 102-7532 CONTROL GP
- 2 129-9191 SENSOR GP
- 4 163-8523 SENSOR GP
- 1 163-8522 SENSOR GP
N
O
T
E
ITEM QTY
MEAS
UNIT
PART NO. NAME
MISC REF
