325 EXCAVATOR ELECTRICAL SCHEMATIC

SENR6213
October 1994
325, 325 L & 325 LN
Excavators Electrical System
9ZK143-UP
2SL528-UP
3LL678-UP
©
1994 Caterpillar
All Rights Reserved
Printed in U.S.A.
Machine
Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
1 Actuator - Governor A-18 16 Sensor - Engine Coolant Temp E-17
3A Alarm - Action E-5 1F Sensor - Fuel Level F-16
2 Alarm - Travel E-17 5H Sensor - Hydraulic Oil Temp A-14
3 Alternator D-17 19 Sensor - Engine Speed C-18
4 Antenna E-14 20 Solenoid - A/C Compress Clutch E-18
5 Batteries A-5 21 Solenoid - Engine Shutdown D-18
1D Block - Terminal B-7 22 Solenoid - Fine Swing C-9
5D Breaker - Alternator A-12 23 Solenoids - Hammer Control D-1,D-2
6 Controller B-13 1H Solenoid - Level B-15
7 Converter D-14 25 Solenoid - Start Aid F-16
3B Dial - Engine Speed D-5 3H Solenoid - Travel Speed A-15
7D Fuse - Block B-9,10,12 2H Solenoid - Trenching A-15
8 Horns A-2 3G Switch - Boom Raise Pressure D-15
9 Lamps - Boom A-2,B-2 6D Switch - Disconnect A-6
43 Lamp - Cab E-1 31 Switch - Engine Oil Pressure D-18
10 Lamp - Chassis A-2 4C Switch - Fine Swing Control F-10
2A Meter - Service E-5 7B Switch - Governor Backup E-12
4A Monitor E-5 5B Switch - Hammer Control D-4
11 Motor - Lower Wiper F-2 3C Switch - Horn F-3
12 Motor - Starter C-17 1G Switch - Implement Swing Pressure D-15
13 Motors - Washer F-16 2B Switch - Low Idle D-5
14 Motor - Wiper F-2 33 Switch - Neutral Start F-6
15 Pump - Refueling F-17 2C Switch - Pump Backup F-11
8D Relay - Boom Lamp A-10 34 Switch - Refrigerate Low Pressure E-18
8D Relay - Chassis/Cab Lamp A-12 35 Switch - Refueling Pressure E-16
8D Relay - Fine Swing A-12 36 Switch - Refueling Pump F-17
8D Relay - Horn B-9 5C Switch - Seat Heater F-10
4D Relay - Main C-12 6B Switch - Speed Change E-11
80 Relay - Refueling Pump A-9 1B Switch - Key Start E-9
3D Relay - Starter B-10 4B Switch - Start Aid D-5
8D Relay - Washer B-10 37 Switch - Start Aid Coolant Temp D-17
8D Relay - Wiper B-12 47 Switches - Travel Pressure F-5
2D Resistor C-9 40 Unit - Air Conditioner F-14
1C Resistor - Backup F-12 44 Unit - Heater F-13
45 Seat - Heater F-13 4H Valve - Proportional Reducing A-15
Component Location Chart
Connectors
Machine
Harness And/Or
Components
Schematic
Location
Connectors
Machine
Location
Harness And/Or
Components
Schematic
Location
40 Contacts *
RR - 117-4555
Controller
A-13
U - 7Y-8105
Converter
E-14
24 Contacts *
RR - 117-4555
Controller
B-13
A - 106-0025
T -5I-8374
E-9
E
A - 106-0025
RR - 117-4555
D-1
H - 5I-8215
T - 5I-8374
E-9
E
A - 106-0025
RR - 117-4555
D-7
A - 106-0025
K - 7Y-3868
F-9
E
A - 106-0025
RR - 117-4555
D-7 E
A - 106-0025
Attachment
D-8
E
A - 106-0025
RR - 117-4555
D-8 C
A - 106-0025
Seat Heater
F-13
A
A - 106-0025
F - 117-5646
E-13 G
RR - 117-4555
Boom Raise Pressure Sw
D-15
A - 106-0025
H - 5I-8215
E-9 H
RR - 117-4555
Proportional Reducing Valve
A-15
B
A - 106-0025
J - 7Y-3921
E-12 G
RR - 117-4555
Implement Swing Pressure Sw
D-15
C
A - 106-0025
L - 102-7902
F-12 H
RR - 117-4555
Level Solenoid
B-15
C - 105-9948
RR - 117-4555
D-16
RR - 117-4555
P - 7Y-3887
B-3
D
M - 117-4554
RR - 117-4555
C-6
RR - 117-4555
Start Aid Temp Sw
D-17
D
M - 117-4554
RR - 117-4555
C-7 H
RR - 117-4555
Travel Speed Solenoid
A-15
D
M - 117-4554
RR - 117-4555
C-7 H
RR - 117-4555
Trenching Solenoid
A-15
A
A - 106-0025
E - 6C-9117
E-13
RR - 117-4555
G - 7Y-8108
C-9
D
D - 7Y-8113
RR - 117-4555
B-18
RR - 117-4555
Attachment
A-18
D
M - 117-4554
RR - 117-4555
C-8 F
C - 105-9948
Fuel Level Sensor
F-16
C
A - 106-0025
Air Conditioner
F-14
C - 105-9948
Refrigerant Pressure Sw
E-18
C
A - 106-0025
Heater Unit
F-13 F
C - 105-9948
Start Aid Solenoid
F-16
B
A - 106-0025
J - 7Y-3921
D-12 F
C - 105-9948
Travel Alarm
E-17
RR - 117-4555
Governor Actuator
A-18 F
C - 105-9948
W - 7Y-3855
E-17
B
H - 5I-8215
Engine Speed Dial
D-5
D - 7Y-8113
A/C Clutch Solenoid
E-18
CCC - 6C-9362
Lower Wiper Motor
F-2
D - 7Y-8113
Speed Sensor
C-18
D
RR - 117-4555
RR - 117-4555
A-13 A
E - 6C-9117
Action Alarm
E-5
A
E - 6C-9117
Monitor
E-5
F - 117-5646
CCC - 6C-9362
E-2
F - 117-5646
Wiper Motor
F-2 B
H - 5I-8215
Start Aid Switch
E-5
F - 117-5646
U - 7Y-8105
D-14 B
J - 7Y-3921
Attachment
C-4
A - 106-0025
C - 105-9948
F-7 C
L - 102-7902
Attachment
F-10
A - 106-0025
H - 5I-8215
E-9 C
L - 102-7902
Seat Heater Switch
F-10
RR - 117-4555
Engine Coolant Temp Sensor
D-18
U - 115-7126
Hammer Control Solenoid
D-2
D - 7Y-8113
Engine Oil Pressure Sw
D-18
U - 7Y-8105
Converter
E-14
B
J - 7Y-3921
Attachment
C-4
W - 7Y-3855
Refueling Pump Motor
F-17
W - 7Y-3855
S - 7Y-8264
F-17
G - 7Y-8108
Fine Swing Solenoid
C-9
C
N - 5I-8375
Fine Swing Control Sw
F-10
E
A - 106-0025
RR - 117-4555
D-6
C
A - 106-0025
Attachment
F-11
A - 106-0025
Travel Pressure Sw
F-5
A - 106-4555
Travel Pressure Sw
F-5
* = Connector is located at the component.
4 Contacts
3 Contacts
2 Contacts
Harness Connector Location Chart
10 Contacts
7 Contacts
5 Contacts
Related Electrical Service Manuals
Title Form No.
Alternator; 9W-3043 SENR4252
Systems Operation
Electronic & Electrical Systems
SENR5404
Testing & Adjusting
Hydraulic & Electronic Systems
SENR5406
Starter Motor:
Consist; 104-7040
6V-5720
106-8557
SENR3581
SENR3859
Resistor, Sender and Solenoid Specifications
Component Part No. Resistance (Ohms)¹
Resistor 7Y-8242 47.0 ± 4.7
Resistor - Backup 102-8015 41 ± 2
Solenoid - Proportional Reducing Valve 5I-8368 11.7 ± 0.6
Solenoid - Engine Shutdown 8C-3663
Latch Coil; 1.55 ± 0.16
Unlatch Coil; 10.3 ± 1.0
Solenoid - Start Aid 9G-4365 6.0
Solenoid - Hammer Control 116-4416 33.7 ± 1.0
Solenoid - A/C Clutch Compressor 117-6319 14.4 ± 0.6
¹ At room temperature.
Off Machine Switch Specifications
Part No. Function Actuate Deactuate Contact Position
4I-5387 Travel Pressure
490.0 ± 49.0 kPa MAX
(71.0 ± 7.1 psi MAX)
290 kPa MIN
(42.0 psi MIN)
Normally Open
6T-1546 Engine Oil Pressure
93 ± 21 kPa
(13.5 ± 3.0 psi)
69 ± 21 kPa
(10.0 ± 3.0 psi)
Normally Open
8C-3569 Engine Coolant Temp (Start Aid)
37.8 ± 2.8°C
(100 ± 5°F)
26.7°C MIN
(80°F MIN)
Normally Closed
102-8041 Implement Pressure
1225 ± 343 kPa
(178 ± 50 psi)
735 kPa MIN
(107 psi MIN)
Normally Open
102-8042 Boom Raise Pressure
2450 ± 441 kPa
(355 ± 64 psi)
1470 kPa MIN
(213 psi MIN)
Normally Open
114-5334 Refrigerant Pressure (A/C)
275 to 1750 kPa¹
(40 to 255 psi)
--
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 (25 psi).
² Contact position at the contacts of the harness connector.
1
2
3
4
3
4
2
1
2
3 4
5
7
8
9
3
4
5
6
1
2
7
AREA A
AREA B
A
33
34
3
4
37
6
7
9
10
11
12
13
14
15
16
3
4
5
6
8
16
10
42
12
40
15
13
16
B
C
H
G
1
2
28
28
19
20
21
22
23
44
25
14
29
9
31
45
37
35
33
34
9
46
7
F
39
8
17
18
19
20
21
22
35
24
25
26
27
28
29
30
31
32
3
5
6
7
9
10
11
12
13
14
15
16
3
4
5
6
8
9
10
11
12
14
15
13
16
H
1
2
19
20
21
22
23
25
28
29
31
37
35
33
34
36
G
39
40
42
43
44
45
46
47
17
18
19
21
22
23
24
25
26
27
28
29
30
31
38
E
D
5
40
23
39
36
31
32
11
43
43
47
40
3
34
35
7
3736
39
10
31 32
13
14
12
18
19
22
26
30
31
4
5
6
9
11
15
16
17
20
21
33
23
24
25
27
28
29
38
32
A
B
C
D
E
F
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
1
2
3
4
5
6
7
8
9
10
1
3
4
5
3
4
5
1
2
3
4
5
6
8
1
2
7
AREA C
AREA D
1
2
3
4
5
6
1
2
3
4
1
2
3
4
1
3
AREA G
AREA H
AREA E
AREA F
3
1
3
4
5
1
2
1
A AA
2
A AA
1
2
325-PK-14
C
A
325-PK-14
200-BK-14
T
FUSE - A component in an electrical circuit that will open the circuit if too much current flows
through it.
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.
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.
Harness And Wire Electrical Schematic Symbols
Socket
Pin
Pin or Socket
Number
Wire, Cable, or Harness
Assembly Identification
Single Wire
Connector
Circuit Number
Identification
Wire
Gauge
Wire
Color
Plug
Receptacle
9X-1123
Component
Part Number
Electrical Schematic Symbols And Definitions
1
1
1
2
2
Typical representation of a
Sure-Seal connector. The
plugand receptacle contain
both pins and sockets.
Typical representation of a
Deutsch connector. The
plug contains all sockets
and the receptacle contains
all pins.
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.
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
Normally open switch that is closed due to an applied condition, and will open again with a
specific decrease in that condition.
Normally closed switch that will open with an increase of a specific condition.
Normally closed switch that is open due to an applied condition, and will close again
with a specific decrease in that condition.
The circle indicates that the component has screw terminals and a wire can be disconnected
from 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.
Electrical Schematic Symbols And Definitions
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
1
2
3
4
4
3
1
1
4
4
3
2
3
1
2
7
7
2
9
3
10
5
1
12
11
13
14
15
16
8
17
39
40
19
5
4
3
4
1
1
20
21
3
2
22
31
1
23
2
3
4
24
25
2
31
4
7
6
5
26
27
28
29
30
8
6
9
36
37
--
576-PK
152-BU
575-YL
200-BK
501-GN
118-GY
200-BK
200-BK
501-GN
118-GY
200-BK
118-GY
501-GN
501-GN
200-BK
118-GY
616-BU
147-PU
586-BR 586-BR
576-PK
152-BU
575-YL
152-BU
578-BU
147-PU
2
1
2
3
4
200-BK
200-BK
D760-YL
310-PU
308-YL
A755-PK
A756-BU
A757-GY
A758-BR
B786-BU
5
200-BK
320-OR
BK-18
RD-18
122-BU
A
B
C
D
E
F
210-BK
AM/FM RADIO
BK-18
135-BU
OR-18
200-BK 200-BK
500-BR
501-GN501-GN
500-BR
B747-PU
B747-PU
B751-YL
2
200-BK
264-BK
266-BK
828-WH
200-BK
200-BK
200-BK
828-WH
830-OR
200-BK
828-WH
830-OR
200-BK
1
D760-YL
200-BK
200-BK
D760-YL
2
1
B747-PU
147-PU
124-GN
A537-PK
B747-PU
513-OR
1
513-OR
2
519-PK
519-PK
B747-PU
147-PU
A537-PK
124-GN
BK-00
B747-PU
200-BK
A537-PK
RD-00
147-PU
A537-PK
B747-PU
124-GN
200-BK
B747-PU
200-BK
168-GN
D764-GN
D764-GN
D764-GN
501-GN
200-BK
200-BK
D761-GN
D760-YL147-PU
147-PU
D761-GN
147-PU
D761-GN
147-PU
147-PU
D761-GN
200-BK
235-BK
200-BK
D761-GND761-GN
200-BK
325-PK
365-YL
325-PK
365-YL
506-PU
513-OR
109-OR-6
113-OR
311-WH
492-GY
403-GN
309-GY
200-BK
200-BK-6
200-BK
200-BK
200-BK
513-OR
311-WH
113-OR
A771-PU
365-YL
168-GN
365-YL
309-GY
506-PU
121-YL
113-OR
B786-BU
10
200-BK-14
103-YL
615-YL
519-PK
103-YL
200-BK
323-WH
168-GN
168-GN
578-BU
310-PU
578-BU
519-PK
200-BK
578-BU
RD
BK
200-BK
576-PK
575-YL
152-BU
109-OR-6
101-RD-14
101-RD-14
101-RD-6
112-PU-6
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
578-BU
501-GN
118-GY
791-PK
115-PK
115-PK
501-GN
118-GY
118-GY
792-OR
118-GY
500-BR
118-GY
323-WH
113-OR
120-YL
149-PU
200-BK
616-BU
101-RD-6
RD-00RD-00
115-PK
112-PU-14
235-BK
RD-00
112-PU-14
200-BK
200-BK
109-OR-6
D764-GN
RELAY PANEL
RELAY PANEL
RELAY PANEL
103-YL
1
492-GY
309-GY
113-OR
112-PU-6
152-BU
BK-00
308-YL
1
310-PU
5
1
2
B786-BU
1
2
7
2
4
2
3
7
OPERATOR STATION
200-BK
A768-BU
6
5
1
B790-OR
B790-OR
B789-BR
B789-BR
B789-BR
B790-OR
5
B956-PK
B955-YL
615-YL
200-BK
103-YL
500-BR
308-YL
308-YL
410-WH
200-BK
403-GN
113-OR
B956-PK
B730-OR
121-YL
830-OR
142-BU-14
D760-YL
129-BU
501-GN
B751-YL
A763-GY
A761-PU
113-OR
A768-BU
763-BU
200-BK
10
A769-GY
A769-GY
A768-BU
763-BU
142-BU
142-BU
142-BU
142-BU
142-BU
142-BU
B964-YL
142-BU-14
4
B751-YL
A763-GY
A761-PU
113-0R
3
A762-PU
326-PU
405-GY
788-YL
200-BK
200-BK-10
301-BU-10
RD-00
304-WH-8
3
113-OR
RD-00
B731-WH
200-BK
B730-OR
185-YL
B751-YL
A763-GY
B789-BR
B789-BR
B739-WH
B790-OR
A769-GY
A768-BU
B790-OR
B740-OR
185-YL
BK-00
200-BK-6
200-BK
200-BK
616-BU149-PU
786-GN
7
149-PU
506-PU118-GY
F
E
D
200-BK
322-GY
200-BK
C
118-GY
200-BK
200-BK
A762-PU
788-YL
405-GY
326-PU
513-OR
2
3
7
4
6
2
1
4
1
3
2
1
101-RD-6
200-BK
304-WH-8
B
9
109-OR-6
2
1
2
120-YL
2
1
2
1
5
200-BK
200-BK
491-PK
B965-GY
142-BU-14
B964-YL
B964-YL
B751-YL
A769-GY
A768-BU
A763-GY
A761-PU
763-BU
491-PK
113-OR
A762-PU
788-YL
326-PU
405-GY
403-GN
304-WH-8
109-OR-6
101-RD-6
365-YL
323-WH
506-PU
495-GN
321-BR
301-BU-10
200-BK-10
326-PU
200-BK
513-OR
200-BK
519-PK
513-OR
519-PK
405-GY
2
3
1
2
200-BK
311-WH
200-BK-6
309-GY
403-GN
109-OR-6
200-BK
492-GY
113-OR
113-OR
495-GN
121-YL
365-YL
323-WH
513-OR
311-WH
8
A771-PU
311-WH
365-YL
828-WH
321-BR
121-YL
321-BR
121-YL
3
200-BK-6
109-OR-8
122-BU
120-YL
122-BU
506-PU 9
321-BR
1
5
6
311-WH
310-PU
506-PU
200-BK
495-GN
BU
6
122-BU
RD
1
2
BK
4
120-YL
200-BK
200-BK
323-WH
200-BK
323-WH
2
5
3
4
1 124-GN-14
118-GY
501-GN
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
615-YL
B956-PK
B955-YL
501-GN
118-GY
4
5
4
8
7
500-BR
D760-YL
403-GN
129-BU
113-OR
1
607-PK
615-YL
615-YL
3
200-BK
10
410-WH
9
A769-GY
576-PK
575-YL
578-BU
152-BU
152-BU
586-BR
147-PU
A768-BU
185-YL
B740-OR
B790-OR
B739-WH
B789-BR
B751-YL
A763-GY
200-BK
4
1
2
5
10
8
9
6
7
3
495-GN
A769-GY
A770-PK
B731-WH
185-YL
185-YL
B731-WH
A770-PK
B730-OR
BK
2
A768-BU
RD
A770-PK
A
200-BK
A983-BU
A758-BR
A757-GY
A756-BU
A755-PK
308-YL
310-PU
105-BR
307-OR
326-PU
308-YL
308-YL
D760-YLD760-YL
308-YL
326-PU
105-BR
A758-BR
A757-GY
A756-BU
A755-PK
310-PU
307-OR
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
235-BK
200-BK
200-BK
320-OR
200-BK
8
3
2
4
5
1
200-BK
B786-BU
10
1
9
8
7
2
3
6
4
1
2
519-PK
124-GN-14
A983-BU
792-OR
791-PK
786-GN
235-BK
184-BU
513-OR
235-BK
B956-PK
B955-YL
B790-OR
B789-BR
B786-BU
B739-WH
B740-OR
B731-WH
B730-OR
A758-BR
A757-GY
A756-BU
A755-PK
410-WH
308-YL
B734-GY
B964-YL
B965-GY
A771-PU
A762-PU
A761-PU
788-YL
763-BU
495-GN
492-GY
491-PK
405-GY
403-GN
321-BR
4
3
2
1
B965-GY
B965-GY
264-BK
112-PU-14
101-RD-14
152-BU
118-GY
121-YL
184-BU
103-YL
114-GN
109-OR-8
306-GN
200-BK
304-WH-8
101-RD-6
101-RD-14
101-RD-14
607-PK
616-BU
322-GY
791-PK
786-GN
A983-BU
792-OR
184-BU
322-GY
320-OR
114-GN
114-GN
506-PU
142-BU-14
113-OR
121-YL
200-BK
200-BK
BK-00
308-YL 309-GY
A762-PU
788-YL
112-PU-14
320-OR
200-BK
112-PU-14
101-RD-14
147-PU
124-GN-14
129-BU
185-YL
105-BR
322-GY
322-GY
200-BK
607-PK
200-BK
10
616-BU
322-GY
200-BK
200-BK
109-OR-6
101-RD-6
304-WH-8
607-PK
616-BU
322-GY
200-BK
615-YL
D760-YL
501-GN
500-BR
120-YL
118-GY
103-YL
320-OR
185-YL
147-PU
129-BU
124-GN-14
105-BR
306-GN
308-YL
2
109-OR-6
109-OR-6
101-RD-6
304-WH-8
200-BK
200-BK-6
200-BK
235-BK
235-BK
235-BK
A983-BU
792-OR
791-PK
786-GN
B964-YL
B965-GY
A771-PU
A762-PU
A761-PU
788-YL
763-BU
495-GN
492-GY
491-PK
405-GY
321-BR
403-GN
304-WH-8
101-RD-6
109-OR-6
506-PU
309-GY
323-WH
142-BU-14
121-YL
A769-GY
A763-GY
B751-YL
326-PU
A768-BU
200-BK
6
5
1
2
5
10
2
1
6
9
8
7
4
3
10
1
6
3
9
8
6
7
5
830-OR
142-BU-14
4
3
7
2
5
1
4
113-OR
184-BU
615-YL
501-GN
500-BR
120-YL
118-GY
152-BU
103-YL
320-OR
185-YL
147-PU
129-BU
124-GN-14
105-BR
306-GN
308-YL
B956-PK
B955-YL
B790-OR
B789-BR
B786-BU
B740-OR
B739-WH
B734-GY
B731-WH
B730-OR
A758-BR
A757-GY
A756-BU
A755-PK
A768-BU
410-WH
200-BK
501-GN
500-BR
410-WH
120-YL
118-GY
152-BU
113-OR
320-OR
308-YL
306-GN
185-YL
147-PU
129-BU
124-GN-14
105-BR
103-YL
B786-BU
B740-OR
B739-WH
B734-GY
B731-WH
9
B730-OR
403-GN
B747-PU
A769-GY
A768-BU
A763-GY
326-PU
200-BK
586-BR
607-PK
A758-BR
A757-GY
A756-BU
A755-PK
B790-OR
B789-BR
9
D760-YL
D760-YL
8
10
7
2
1
6
5
4
3
10
6
5
4
3
9
8
7
2
1
10
9
8
7
2
1
6
5
4
3
8
5
323-WH
1
6
7
2
1
615-YL
3
1
2
200-BK-14
200-BK
306-GN
200-BK
307-OR
B734-GY
B734-GY
306-GN
124-GN-14
615-YL
B956-PK
B955-YL
501-GN
500-BR
410-WH
403-GN
129-BU
120-YL
118-GY
113-OR
103-YL
B731-WH
B730-OR
A769-GY
A768-BU
185-YL
147-PU
B789-BR
B751-YL
B740-OR
B739-WH
A763-GY
586-BR
152-BU
B790-OR
320-OR
B786-BU
A758-BR
A757-GY
A756-BU
A755-PK
326-PU
308-YL
105-BR
200-BK
200-BK
616-BU
200-BK
200-BK
129-BU
403-GN
410-WH
113-OR
B955-YL
201-BK
BK-00
1
B955-YL
4
3
B956-PK
D760-YL
113-OR
4
2
3
616-BU
200-BK
615-YL
A
200-BK
ATCH
COMBINED SOL
QQ
QQ
QQ
ATCH
LIMIT-SW
3T3132
952-OR
QQ
200-BK
1
2
952-OR
1
2
3
4
152-BU
152-BU
4I6158
1
2
3
4
1
2
3
4
F
+
S
+1
-
MOTOR
MOTOR
-
+1
S
+
F
F
UPPER WIPER
6C9102
615-YL
200-BK
LOWER WIPER
6C8438
4
3
2
1
117-5645
BOLT
117-5645
BOLT
F
L1
Z
615-YL
Z
200-BK
615-YL
ATCH
CAB LAMP
5I-8250
ATCH
CAB LAMP
5I-8250
X
615-YL
615-YL
200-BK
200-BK
X
Y
Z
Y
Z
CAB
CAB
OPERATOR STATION
1
2
BOOM LAMP
5I-8250
HORN
7T-0970
HORN
7T-0969
CHASSIS
LAMP
5I-8251
L10
ATCH
BOOM LAMP
5I-8250
R
P
P
R
V
V
RR
RR
RR
RR
LL
LL
LL
LL
546-BU
198-PK
198-PK
547-OR
ATCH CONT.GP LH
1132531
HORN SW
K
K
LH-SW
RH-SW
L34
L44
A
PROVISION FOR ATCH
SW 7X-6388
(RH CONSOLE)
PROVISION FOR ATCH
SW 7X-6387 OR 7X-6386
(LH CONSOLE)
102-8041
L33
L34
551-YL
955-BU
547-OR
551-YL
548-GY
547-OR
551-YL
549-PK
548-GY
198-PK
147-PU
550-OR
L36
3
2
1
547-OR
546-BU
198-PK
546-BU
B734-GY
547-OR
550-OR
548-GY
550-OR
549-PK
200-BK
L37
198-PK
198-PK
147-PU
550-OR
551-YL
549-PK
548-GY
547-OR
546-BU
198-PK
1
2
3
4
5
6
2
1
547-OR
546-BU
198-PK
551-YL
549-PK
548-GY
198-PK
147-PU
550-OR
PP
J
J
J
L38
PP
B
LL
198-PK
147-PU
550-OR
551-YL
549-PK
548-GY
PLATFORM
3
2
1
198-PK
B
113-2531
ATCH HAMMER-AHC CONT.
SW 7X6388
2
1
ATCH-PRESSURE SW
SAFETY
ATCH-HAMMER FOOT
SW
1
1
2
2
955-BU
198-PK
147-PU
198-PK
B734-GYB734-GY
200-BK
PP
PP
PP
1
2
3
1
2 2
1
L33
A
10
6
5
4
2
9
7
8
1
B
198-PK
549-PK
548-BU
198-PK
B
B
B
B
H
H
ONE TOUCH LOW
IDLE SW
LH-SW
RH-SW
B
L35
H
UU
K973-PK
K974-PU
K975-WH
K976-BR
200-BK
A755-PK
A756-BU
A757-GY
A758-BR
UU
UU
NOTE G
L31
L31
L32
L32
L35
K973-PK
K974-PU
K975-WH
K976-BR
200-BK
A755-PK
A756-BU
A757-GY
A758-BR
ATCH RPM REGULATOR
116-9958
ATCH HAMMER
CONT. SOL.
116-4416
TT
2
1
ENGINE SPEED
CONTROL
- +
548-GY
551-YL
548-GY
551-YL
548-GY
551-YL
+
-
ATCH SERVICE
METER
6T7337
3
2
1
ATCH HAMMER
CONT.SOL.
7Y5005
SS
547-OR
2
1
TTTT
1
2
ATCH BOOM DOWN
SOL. 4I6158
TTTT
3
2
1
551-YL
548-GY
551-YL
SSTT
PPPP
551-YL
548-GY
547-OR
551-YL
955-BU
547-OR
551-YL
955-BU
547-OR
551-YL
548-GY
547-OR
PPPP
TTSS
551-YL
548-GY
551-YL
3
2
1
547-OR
3
2
1
NOTE H
2
1
548-GY
551-YL
551-YL
547-OR
L38
ONE TOUCH
LOW IDLE SW
6I-5088
ATCH START
AID SW
7X-6387
ENGINE
SPEED DIAL
7Y-5465
COM
SIG 1
SIG 2
SIG 3
SIG 4
PROVISION FOR ATCH
SW 7X-6386 OR 7X-6387
M
4
6
3
2
7
8
9
1
10
55
10
1
9
8
7
2
3
6
4
308-YL
326-PU
105-BR
K976-BR
K975-WH
K974-PU
K973-PK
310-PU
200-BK
307-OR
307-OR
310-PU
200-BK
A755-PK
A756-BU
A757-GY
A758-BR
105-BR
326-PU
308-YL
308-YL
326-PU
105-BR
A758-BR
A757-GY
A756-BU
A755-PK
200-BK
310-PU
RR
307-OR
F
200-BK
TO RADIO
U
U
U
U
2
4
1
3
ATCH
ANTENNA
106-0036
ATCH
CONVERTER
108-9968
1
2
3
2
1
GROUND
+ BATTERY
+12 VOLT
GROUND
6 DIN 46327
PROVISION FOR
BEACON LIGHT
F
1
2
8103 YL/RD 8103 YL/RD
2
1
E
F
S
NOTE J: USE WHEN ATCH FOPS IS INSTALLED
NOTE H: CONNECT THIS WAY WHEN ATCH HAMMER
FOOT SW IS USED
FF 7G-1060 F-14
R 7Y-8216 A-2
NOTE G: HARNESS UU IS INSERTED BETWEEN HARNESS A
AND H WHEN ATCH RPM IS INSTALLED
NN 112-3336 B-2
A 106-0025 D-7
1314151617 1245678910
9
18
11
12 11 10 8 7
12
6 5 4 3 2
18
1
Q
Y 117-7028 F-1
KK
S
S
KK 7Y-8298 B-17 (NOTE B)
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RRRRRR
RR
RR
TRAVEL SW (LEFT)
RR
RR
RR
RR RR RR RR RR
RR
RR
RR 117-4555 D-7
NOTE
RR
A
A
A
A
RR
RR
RR
1
2
RR
A
TRAVEL
PRESS SW
(LEFT)
4I-5387
2
1
1
2
A
MM 113-9860 E-9
T N
LL 114-4876 C-3
N
ATCH
FINE SWING
CONT SW
7X-6386
1
2
1
T
A
2
3 3
2
QQ 118-0075 F-1
TT 115-7126 D-2
2
1
B957-GN
168-GN
ATCH
SEAT WITH
SEAT HEATER
110-5265
A
Q
UU 115-7125 E-4
Z 117-7029 F-1
1
2
2
1
ATCH
SEAT HEATER SW
7X-6386
1
2
L
L
7N-0719(NOTE B)
B957-GN
B957-GN
B957-GN
365-YL
365-YL
B957-GN
1
2
X 6C-9134 F-1 (NOTE J)
ATCH FINE
SWING RELAY
7Y-5490
2
11
2
1
H
J
W
W
W
W C
19
ATCH
REFUELING
PUMP
6C-5572
J
J
J
MOTOR
1
2
2
1
1
2
ATCH
REFUELING SW
5C-6108
MOTOR
W 7Y-3855 E-17
439-YL
308-YL
MM
NN
NN
NN
200-BK
586-BR
YL
BR
ATCH-SW AS.ROCKER
7X6386
ATCH-BUZZER
113-4683
ATCH-PRESSURE SW
6C6806
2
1
1
2
PLATFORM
V 7Y-8143 A-2 (NOTE A)
NOTE A: USE WITH SHORT BOOM
L24
L23
L24
L18
L23
L24
ATCH REFUELING
PUMP RELAY
7Y-5490
20A
15A10A
ATCH REFRIGERANT
SW 114-5334
AAA
HORN SW
6I-5088
B957-GN
168-GN
B957-GN
168-GN
WW
WW
L4
L25
L19
L22
L4
L6
L20
L4
L7
L8
L3
L8
L3
L4
L8
L31
DOME LAMP
096-0721
J
J
A
A
B957-GN
168-GN
ATCH REFUELING PUMP
START SW(NORMALY OPEN)
9X4959
ATCH REFUELING PUMP
STOP SW(NORMALY CLOSED)
9X4959
B957-GN
168-GN
ATCH
WASHER
MOTOR
7T-8890
MOTOR
C
ALT BREAKER
9S-0174
L31
CHASSIS/CAB LIGHT
RELAY
7Y-5490
WIPER RELAY
7Y-5490
L27
SOLENOID
MONITOR
RADIO
BOOM LAMP
CHASSIS/CAB LAMP
VV
MAIN RELAY
3T-0376
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAGE
COMPONENT ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF
THIS SCHEMATIC IS FOR THE 325 EXCAVATOR (7Y3900-02)
JJ 7Y-5507 A-6 (NOTE B)
HH 7Y-3946 A-5 (NOTE B)
GG 111-4737 A-5 (NOTE B)
A
EE 7Y-3883 B-17
DD 105-9947 A-6
CC 105-9940 A-5
BB 7Y-3946 A-5
AA 111-4725 A-5
CABLE AS.
VV 111-4711 B-10
WIRE AS.
T 5I-8374 F-12
S 7Y-8264 F-17
Q 113-2486 E-17
D
D
GG
CAB
CHASSIS
D
AA
T
EE
H
CHASSIS
C
PLATFORM
PLATFORM
168-GN
M
MM
XX
M
A A
E
E
CCCC BB AA
DD
JJ
JJ HH
GG
P 7Y-3887 B-2
N 5I-8375 F-10
M 117-4554 B-7
L 102-7902 C-12
K 7Y-3868 F-9
J 7Y-3921 E-12
H 5I-8215 E-9
G 7Y-8108 C-9
F 117-5646 E-13
E 6C-9117 E-13
D 7Y-8113 C-18
C 105-9948 D-16
B 117-7253 C-4
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
IDENT PART NO. LOC
HARNESS AS.
C
C
D
D
D
C
C
C
E
F
A
AC
K
HA
H
A
A
A A A A A
M
M
M
M
AAA
CHASSIS
CAB
E
E
NOTE B: USE WITH COLD WEATHER
BK-00 BK-OO
POS
NEGNEG
POS
BATTERY
3T-5760
L6
L7
L8
L9
L20
L5
L1
L7
L5
L3
L6
L7
L5
L2
L6
L6
L16
L15
L12
L14
L17
L5
L7
L6
L7
L6
L8
L9
L5
L12
L11
L2
L1
L13
L12
L11
L13
L14
L16
L15
L12
L14
L17
L15
L17
L16
L30
L2
L27
L3
OPERATOR STATION
OPERATOR STATION
OPERATOR STATION
OPERATOR STATION
OPERATOR STATION
OPERATOR STATION
RR
F
ATCH
START AID SOL
9G-4365
11
24
2
HYD OIL LEVEL SW
BOOM RAISE PRESS SW
OPTION SOLENOID
13
5
4
16
9
15
SWING POWER CHANGE SOLENOID
COOLANT LEVEL SW
ENGINE OIL LEVEL SW
OPTION SENSOR
OPTION SW 1
OPTION SW 2
10
11
4
3
26
16
15
23
31
21
18
17
OPTION RELAY 3
OPTION RELAY 2
OPTION RELAY 1
GLOW
RS232C RxD
RS232C TxD
PWM OUT -
PWM OUT +
28
L4
L3
ATCH
START AID
COOLANT TEMP SW
8C-3569
ENG OIL
PRESS SW
6T-1546
ALTERNATOR
9W-3043
ENGINE
SHUTDOWN SOL
8C-3663
ATCH
TRAVEL ALARM
3T-1444
ATCH
A/C COMPR
CLUTCH SOL
117-6319
COOLANT TEMP
SENSOR
3E-5370
ENGINE SPEED
SENSOR
3E-7886
FUEL
LEVEL
SENSOR
7Y-3848
WASHER
MOTOR
7T-8890
IMPLEMENT
PRESS SW
102-8041
KEY START
SWITCH
9G-7641
VV
DISCONNECT
SWITCH
7N-0718
CIGAR
LIGHTER
9W-0335
U 7Y-8105 E-14
3E-6328
7Y-5500
6T-7337
1
FF
B957-GN
L30
L28
WASHER RELAY
WIPER MOTOR RELAY
CHASISS LAMP RELAY
BOOM LAMP RELAY
GND
BACKUP SW1
HARNESS CODE 4
HARNESS CODE 3
HARNESS CODE 2
HARNESS CODE 1
RS485 -
RS485 +
BACKUP SW2
LOW IDOL SW
G/A -
G/A +
+B (24V)
GND
SWING BRAKE SW
ENG SPEED SENSOR -
G/A SENSOR
ENG SPEED SENSOR +
TRAVEL SOLENOID
FUEL LEVEL SENSOR
COOLANT SENSOR
HYD OIL TEMP SENSOR
ENGIN OIL SW
ALTERNATOR (R TERM)
TRAVEL ALARM
LEVEL FINISH SOL.
TRENCHING SOL.
PROPORTIONAL
REDUCING VALVE
SOL
L23
TRAVEL SW (RIGHT)
G
TRAVEL SPEED
SOL
7I-1245
L25
AA
6
4
3
1
5
2
7N-8008
D
HYD OIL TEMP
SENSOR
4I-5394
BOOM RAISE
PRESS SW
102-8042
2
1
ENG GOV
ACTUATOR
7Y-5461
STARTER
MOTOR
104-7040
9X-4507(NOTE B)
GROUND STRAP
7G-1060
CHASSIS PLATFORM
2
1
T
E
W
D
B+
ALT
GROUND
SIGNAL
+B
C
B
A
CHASSIS
L1
XX
2
1
XX 111-4710 B-7
AAA 116-8178 F-18
PP 117-2973 C-1
2
1
L17
MOTOR
2
1
2
1
A
L2
T
L18
L19
L18
4
6
1
3
5
2
BACKUP
GOV SW
3T-4405
ATCH
A/C UNIT
107-1994
2
ENGINE
PUMP CONTROL
102-8010
A
LA
L
A
4
6
1
3
5
2
10
1
2
3
4
9
6
R
C
S
B
OFF
CCC 6C-9362 F-2
CCC
CCC
ON
ST
L42
L41
L40
L42
L41
L40
K
BBB 6C-6824 B-2
BBB
BBB
586-BR
439-YL
L8
L9
2
1
M
2
3
BACKUP
RESISTOR
102-8015
BACKUP SW
3T-4405
8
BOOM LIGHT RELAY
7Y-5490
H
H
H
H
K
1
L20
L19
3
4
L18
5
L19
L22
L1
L18
L16
L15
L12
L14
L20
L21
546-BU
B734-GY
547-OR
550-OR
548-GY
550-OR
549-PK
25
35
14
24
5
1
2
BACKUP SW3
L22
1
L21
L22
L12
L15
SS 115-7124 D-1
2
3
PP
HEATER UNIT
107-1995
PP
L1
L37
EPR SOLENOID +
EPR SOLENOID -
ACCELERATOR 5
ACCELERATOR 4
ACCELERATOR 3
ACCELERATOR 2
MONITOR ALARM
KEY SW
ATTACHMENT
TRENCHING
SOL
7I-1247
LEVEL FINISH
SOL
7I-1246
L2
L16
L14
ATCH
BATTERY
3T-5760
(NOTE B)
33
32
12
22
40
30
19
20
34
36
6
7
8
9
29
39
38
37
20
7
8
17
12
21
19
6
1
22
23
10
18
3
14
WASHER RELAY
7Y-5490
WIPER/WASHER
WIPER/WASHER
TRAVEL ALARM
E/P CONT
DOME LAMP
HORN
SIG
GND
24V+
SIG
L31
L26
L30
L29
GND
200-BK
5V+
L28
L23
HAMMER
A/C /HEATER
CIGAR LIGHTER
BACK UP
RESISTOR
7Y-8242
L26
10A
10A
10A
10A
10A
10A
POS
NEG NEG
POS
L36
START RELAY
9X-8124
HORN RELAY
7Y-5490
10A
10A
15A
10A
10A
10A
NEUTRAL START
AID SWITCH
9W-2150
L28
KEY SWITCH
10A
20A
10A
15A
10A
10A
L10
L11
L13
L28
L27
L29
D760-YL
BLOCK AS.
7Y-5499
7
5
L9
TRAVEL
PRESS SW
(RIGHT)
4I-5387
G
L29 L29
L27
FF
MM
L3
ATCH FINE
SWING SOL
7I-0124
WW 111-4709 B-11
ATCH REFUELING
PUMP RELAY
7Y-5490
L26
2
1
+
-
27
GND
+BATTERY
FINE SWING
REFUELING PUMP
2
1
266-BK
13
WINDSHIELD
SWITCH
9G-2795
501-GN
PLATFORM
E
17 16 15 14 13
500-BR
Q
3
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.
STARTING CIRCUIT.
GAUGE CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CIRCUIT.
START AID CIRCUIT.
5I-8368
PUMP
SPEED
CHANGE SW
L44
L44
MONITOR
ACTION ALARM
ATCH
CONT.GP RH
ACTION ALARM