330 EXCAVATOR ELECTRICAL SYSTEM SCHEMATIC

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
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.
A
46
43
3
13
5
6
7
38
9
10
11
12
13
14
44
40
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
19
20
21
22
23
46
25
28
29
31
37
35
33
34
36
46
7
F
39
40
46
42
43
44
45
46
47
47
17
18
19
20
39
22
23
45
25
26
27
28
29
30
31
32
A
46
43
3
38
5
6
7
40
9
10
11
12
13
14
39
16
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
19
20
21
22
23
25
46
28
29
31
37
35
33
34
36
7
F
39
40
42
43
44
45
46
47
46
17
18
19
20
45
22
23
24
44
26
27
28
29
30
31
32
37
34
35
36
33
25
42
41
16
24
33
35
37
34
36
42
41
G
H
9
8
43
H
G
Machine Harness Connector and Component Locations
Component Location Chart
Machine
Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
1
Actuator - Governor
C-13 16
Sensor - Engine Coolant Temp
D-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
B-17
1D
Block - Terminal
B-7 22
Solenoid - Fine Swing
C-9
50
Breaker - Alternator
A-12 23
Solenoids - Hammer Control
D-1 ,D-2
6
Controller
B-13 1H
Solenoid - Level/Finish
B-15
7 Converter D-14 4H
Solenoid - Proportional Reducing Valve
A-15
3B Dial - Engine Speed D-5 25
Solenoid - Start Aid
F-16
70
Fuse - Block
B-9,10,12 3H
Solenoid - Travel Speed
A-15
8
Horns
A-2 2H
Solenoid - Trenching
A-15
9
Lamps - Boom
A-2,B-2 3G
Switch - Boom Raise Pressure
D-15
43
Lamp - Cab
E-1 6D
Switch - Disconnect
A-6
10
Lamp - Chassis
A-2 31
Switch - Engine Oil Pressure
C-18
2A
Meter - Service
E-5 4C
Switch - Fine Swing Control
F-10
4A
Monitor
E-5 7B
Switch - Governor Backup
E-12
11
Motor - Lower Wiper
F-2 5B
Switch - Hammer Control
D-4
12
Motor - Starter
B-17 3C
Switch - Horn
F-3
13
Motors - Washer
F-16 1G
Switch - Implement Swing Pressure
D-15
14
Motor - Wiper
F-2 2B
Switch - Low Idle
D-5
15
Pump - Refueling
F-17 33
Switch - Neutral Start
F-6
8D
Relay - Boom Lamp
A-10 2C
Switch - Pump Backup
F-11
8D
Relay - Chassis/Cab Lamp
A-12 34
Switch - Refrigerate Low Pressure
E-18
8D
Relay - Fine Swing
A-12 35
Switch - Refueling Pressure
E-16
8D
Relay - Horn
B-9 36
Switch - Refueling Pump
F-17
4D
Relay - Main
C-12 5C
Switch - Seat Heater
F-10
4D
Relay - Main (Attachment)
B-11 6B
Switch - Speed Change
E-11
8D
Relay - Refueling Pump
A-9 1B
Switch - Key Start
E-9
3D
Relay - Starter
C-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
1
2
3 4
3
4
1
2
1
2
3
4
5
6
7
8
9
3
4
6
8
9
10
1
2
7
Connectors
Machine
Location
Harness And/Or Components
Schematic
Location
Connectors
Location
Harness And/Or Components
Schematic
Location
40 Contacts *
RR - 117-8914
Controller
A-13
A - 106-0025
K - 7Y-3868
F-9
24 Contacts *
RR - 117-8914
Controller
B-13
A - 106-0025
Attachment
D-8
A - 106-0025
RR - 117-89l4
D-7
A - 106-0025
Seat Heater
F-13
A - 106-0025
RR-117-8914
D-7
RR - 117-8914
Boom Raise Pressure Sw
D-15
A - 106-0025
RR - 117-8914
D-7
RR - 117-8914
Proportional Reducing Valve
A-15
A - 106-0025
RR - 117-8914
D-8
RR - 117-8914
Implement Swing Pressure Sw
D-15
A - 106-0025
F - 117-5646
E-13
RR - 117-8914
Level Solenoid
B-15
A-106-0025
H - 5l-8215
E-9
RR - 117-8914
P - 7Y-3988
B-3
A - 106-0025
J - 7Y-3921
E-12
RR - 117-8914
Start Aid Temp Sw
D-17
A - 106-0025
L - 102-7902
F-12
RR - 117-8914
Travel Speed Solenoid
A-15
C - 105-9930
RR - 117-8914
D-16
RR - 117-8914
Trenching Solenoid
A-15
D - 7Y-8127
RR - 117-8914
C-16
RR - 117-8914
G-5I-8284
C-9
M - 117-4556
RR - 117-8914
C-6
RR - 117-8914
Attachment
A-18
M - 117-4556
RR - 117-8914
C-7
C - 105-9930
Fuel Level Sensor
F-16
M - 117-4556
RR - 117-8914
C-7
C - 105-9930
Refrigerant Pressure Sw
E-18
A - 106-0025
E - 6C-9117
E-13
C - 105-9930
Start Aid Solenoid
F-16
M - 117-4556
RR - 117-8914
C-8
C - 105-9930
Travel Alarm
E-17
A - 106-0025
Air Conditioner
F-14
C - 105-9930
W - 105-9934
E-17
A - 106-0025
Heater Unit
F-13
D - 7Y-8127
A/C Clutch Solenoid
E-18
A - 106-0025
J - 7Y-3921
D-12
D - 7Y-8127
Speed Sensor
C-18
RR - 117-8914
Governor Actuator
C-14
E - 6C-9117
Action Alarm
E-5
H - 5I-8215
Engine Speed Dial
D-5
F - 117-5646
V - 6C-9362
E-2
V - 6C-9362
Lower Wiper Motor
F-2
H - 5I-8215
Start Aid Switch
E-5
RR - 117-8914
RR - 117-8914
A-13
J - 7Y-3921
Attachment
C-4
E - 6C-9117
Monitor
E-5
L - 102-7902
Attachment
F-10
F - 117-5646
Wiper Motor
F-2
L - 102-7902
Seat Heater Switch
F-10
F - 117-5646
U - 7Y-8105
D-14
TT - 115-7126
Hammer Control Solenoid
D-2
A - 106-0025
C - 105-9930
F-7
U - 7Y-8105
Converter
E-14
A - 106-0025
H - 5I-8215
E-9
W - 105-9934
Refueling Pump Motor
F-17
RR - 117-8914
Engine Coolant Temp Sensor
D-18
W - 105-9934
S - 7Y-8264
F-17
D - 7Y-8127
Engine Oil Pressure Sw
D-18
G - 5I-8284
Fine Swing Solenoid
C-9
J - 7Y-3921
Attachment
C-4
N - 5I-8375
Fine Swing Control Sw
F-10
U - 7Y-8105
Converter
E-14
A - 106-0025
RR - 117-8914
D-6
A - 106-0025
T - 51-8374
E-9
A - 106-0025
Attachment
F-11
H - 5I-8215
T - 5I-8374
E-9
A - 106-0025
Travel Pressure Sw
F-5
A - 106-0025
Travel Pressure Sw
F-5
* = Connector is located at the component.
HARNESS CONNECTOR LOCATION CHART
3 Contacts
2 Contacts
10 Contacts
7 Contacts
5 Contacts
4 Contacts
1
3
4
5
6
7
8
9
10
3
4
5
6
1
2
7
1
2
3
4
5
3
4
5
6
8
1
9
7
1
2
3
4
5
6
1
3
1
3
2
1
2
3
4
6
3
4
5
3
1
2
1
Off Machine Switch Specification
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
9X-4276
Engine Oil Pressure
93 ± 21 kPa
(13.5 ± 3.0 psi)
69 ± 21 kPa
(10.0 ± 3.0 psi)
1-3,Normally Closed
1-2,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)
275to1750kPa¹
(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 (25psi).
² Contact postion at the contacts of the harness connector.
Resistor, Sender and Solenoid Specifications
Component Description
Part No.
Resistance (Ohms)¹
102-8016 47.0 ± 2.4
3E-7985
Latch Coil; 1.55 ± 0.16
Unlatch Coil; 10.3 ± 1.0
5I-8368 11.7 ± 0.6
9G-4365 6.0
116-4416 33.7 ± 1.0
117-6319 14.4 ± 0.6
¹ At room temperature unless otherwise noted.
Solenoid - Hammmer Control
Solenoid - A/C Clutch Compressor
Resistor - Backup
Solenoid - Engine Shutdown
Solenoid - Proportional Reducing Valve
Solenoid - Start Aid
Related Electrical Service Manuals
Form No.
SENR4130
SENR2082
SENR5404
SENR3581
SENR4975
SENR3536
Type
Alternator (100-5047):
Consist No. 100-5045
Consist No. 100-5046
Consist No. 6V-5538
Consist No. 106-8557
Systems Operation
Electronic & Electrical Systems
Starter Motor (6V-5227)
Consist No. 6V-5537
B
C
D
D
D
D
A
D
C
C
B
B
D
A
B
E
C
G
H
G
H
H
H
F
F
F
F
A
B
B
C
C
E
C
SENR6243
November 1994
330, 330 L & 330 LN
Excavators Electrical System
330 #:
6ZK64-UP
330 L #:
2EL332-UP
330 LN #:
8CK206-UP
1
2
3
4
4
3
1
1
4
1
4
3
2
3
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
E
E
E
E
A
©
1994 Caterpillar
All Rights Reserved
Printed in U.S.A.
113-OR
B956-PK
3
4
B955-YL
1
201-BK
B955-YL
113-OR
410-WH
403-GN
129-BU
200-BK
200-BK
B734-GY
307-OR
200-BK
306-GN
RD
2
BK
BK
RD
BU
129-BU
B956-PK
113-OR
403-GN
200-BK
410-WH
1
578-BU
152-BU
575-YL
576-PK
200-BK
200-BK
830-OR
828-WH
200-BK
830-OR
235-BK
RELAY PANEL
RELAY PANEL
828-WH
200-BK
200-BK
200-BK
5
B786-BU
152-BU
A758-BR
A757-GY
A756-BU
A755-PK
308-YL
310-PU
D760-YL
200-BK
200-BK
4
3
2
1
4
3
7
2
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
112-PU-14
112-PU-14
101-RD-14
147-PU
124-GN-14
129-BU
185-YL
105-BR
607-PK607-PK
616-BU
322-GY
200-BK
615-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
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
235-BK
A983-BU
792-OR
791-PK
786-GN
6
5
1
2
5
10
2
1
6
9
8
7
4
3
10
1
6
3
9
8
7
2
5
4
184-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
501-GN
118-GY
791-PK
115-PK
115-PK
501-GN
118-GY
118-GY
792-OR
500-BR
142-BU-14
113-OR
120-YL
149-PU
115-PK
112-PU-14
112-PU-14
109-OR-6 112-PU-6
308-YL
200-BK
616-BU
200-BK
200-BK
616-BU149-PU
786-GN149-PU
506-PU118-GY
118-GY
120-YL
607-PK
615-YL
615-YL
616-BU
200-BK
607-PK
200-BK
200-BK
200-BK
322-GY
616-BU
200-BK
200-BK
322-GY
322-GY
200-BK
322-GY
200-BK
A983-BU
112-PU-14
101-RD-14
152-BU
118-GY
121-YL
184-BU
103-YL
114-GN
306-GN
200-BK
304-WH-8
616-BU
200-BK
BK
RD
200-BK
320-OR
200-BK
OPERATOR STATION
616-BU
118-GY
200-BK
501-GN
501-GN
118-GY
200-BK
118-GY
501-GN
200-BK
200-BK
118-GY
501-GN
200-BK
575-YL
152-BU
576-PK
4
3
2
1
147-PU
578-BU
152-BU
575-YL
152-BU
576-PK
586-BR
310-PU
578-BU
519-PK
200-BK
578-BU
F
4
5
3
1
2
B957-GN
168-GN-14
323-WH-14
265-BK
109-OR-6
113-OR
A762-PU
788-YL
492-GY
405-GY
326-PU
403-GN
200-BK
513-OR
311-WH
8
10
7
6
9
1
3
4
2
5
830-OR
828-WH
828-WH
200-BK-6
147-PU
124-GN
A537-PK
B747-PU
B747-PU
147-PU
A537-PK
124-GN
B747-PU
200-BK
A537-PK
147-PU
A537-PK
B747-PU
124-GN
200-BK
1
4
3
5
2
B786-BU
200-BK
326-PU
200-BK-14
103-YL
615-YL
519-PK
103-YL
200-BK
A
B
C
D
E
F
101-RD-6
RD-00RD-00
578-BU
103-YL
168-GN-14
122-BU
120-YL
RELAY PANEL
310-PU
B786-BU
1
326-PU
2
4
3
7
6
5
1
B790-OR
B790-OR
B789-BR
B789-BR
B789-BR
B790-OR
5
200-BK
103-YL
500-BR
B730-OR
BK-00
501-GN
1
2
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
A768-BU
2
519-PK
122-BU
2
1
B956-PK
B955-YL
615-YL
6
122-BU
120-YL
121-YL
2
5
3
4
1 124-GN-14
118-GY
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
615-YL
B956-PK
B955-YL
501-GN
A768-BU
763-BU
118-GY
B964-YL
A769-GY
A769-GY
A768-BU
763-BU
142-BU
142-BU
5
142-BU
142-BU
142-BU
142-BU
B964-YL
142-BU-14
4
8
7
403-GN
129-BU
113-OR
1
3
10
200-BK-14
RD-00
304-WH-8
410-WH
200-BK-6
9
113-OR
A769-GY
RD-00
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
BK-00
8
9
6
200-BK
7
403-GN
788-YL
A762-PU
513-OR
311-WH
3
2
1
113-OR
113-OR
492-GY
200-BK A761-PU
B751-YL
A763-GY
2
1
3
101-RD-6
304-WH-8
101-RD-6
304-WH-8
5
405-GY
A769-GY
4
A770-PK
2
1
B731-WH
185-YL
A770-PK
2
1
2
1
185-YL
B731-WH
B964-YL
B965-GY
B751-YL
A769-GY
A768-BU
A770-PK
763-BU
491-PK
113-OR
A762-PU
788-YL
492-GY
405-GY
142-BU-14
B730-OR
506-PU
495-GN
321-BR
109-OR-6
A771-PU
A763-GY
200-BK
513-OR
519-PK
513-OR
2
3
1
200-BK
405-GY
109-OR-6
326-PU
2
200-BK
200-BK
200-BK
200-BK
311-WH
200-BK
109-OR-6
200-BK-6
200-BK
492-GY
113-OR
A768-BU
506-PU
495-GN
321-BR
121-YL
513-OR
311-WH
A771-PU
311-WH
321-BR
121-YL
321-BR
121-YL
266-BK
200-BK
506-PU
200-BK 495-GN
A761-PU
506-PU
513-OR
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-BK200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
320-OR
200-BK
3
2
4
5
1
200-BK
200-BK
D760-YL
E
D
C
B
A
200-BK
10
1
9
8
7
2
3
6
4
1
2
323-WH
519-PK
124-GN-14
365-YL
320-OR
200-BK
615-YL
495-GN
3
1
2
200-BK-14
200-BK
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
D760-YL
615-YL
235-BK
365-YL
325-PK
513-OR
1
513-OR
2
519-PK
519-PK
D760-YL
200-BK
500-BR
501-GN 501-GN
500-BR
200-BK
A983-BU
792-OR
791-PK
786-GN
235-BK
184-BU
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
403-GN
200-BK
2
OR-18
3
4
1
301-BU-14
B965-GY
B965-GY
135-BU
BK-18
AM/FM RADIO
210-BK
122-BU
RD-18
BK-18
A762-PU
788-YL
513-OR
311-WH
113-OR
BK-00
492-GY
A762-PU
788-YL
200-BK
RD-00
200-BK-14
405-GY
RD-00
200-BK
D760-YL
B786-BU
586-BR
147-PU
109-OR-6
101-RD-6
304-WH-8
403-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
142-BU-14
121-YL
A769-GY
A763-GY
B751-YL
326-PU
A768-BU
B747-PU
491-PK
B747-PU
A769-GY
A768-BU
325-PK
763-BU
200-BK-14
323-WH-14
200-BK-14
1
2
1
2
365-YL
323-WH-14
323-WH-14
365-YL
365-YL
323-WH-14
200-BK
D761-GN
200-BK
D761-GN
113-OR
2
1
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
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
B730-OR
403-GN
B751-YL
A769-GY
A768-BU
A763-GY
326-PU
200-BK
586-BR
A758-BR
A757-GY
A756-BU
A755-PK
B790-OR
B789-BR
9
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
10
9
8
2
1
6
5
B965-GY
B964-YL
830-OR
1
6
200-BK
310-PU
311-WH
1
2
D761-GN
506-PU
142-BU-14
121-YL
113-OR
147-PU
9
7
200-BK
5
4
323-WH-14
3
1
10
365-YL 2
109-OR-8
8200-BK
D761-GN
147-PU
D761-GN
147-PU
147-PU
147-PU
D761-GN
D760-YL
118-GY 501-GN118-GY
D760-YL
500-BR
D760-YL
D760-YL
D760-YL
200-BK
266-BK
BK-00
200-BK
2
1
B747-PU
B747-PU
491-PK
200-BK
B747-PU
B747-PU
7
6
4
2
1
D764-GN
D764-GN
D764-GN
109-OR-8
200-BK
2
1
D764-GN
7
4
2
3
500-BR
E
PLATFORM
501-GN
WINDSHIELD
SWITCH
9G-2795
1
2
+BATTERY
GND
-
+
L3
TRAVEL
PRESS SW
(RIGHT)
4I-5387
NEUTRAL START
AID SWITCH
9W-2150
H
H
H
H
SERVICE
METER
6T-7337
7Y-5500
3E-6328
CIGAR
LIGHTER
9W-0335
OPERATOR STATION
L2
E
E
CAB
E
E
AA
A
A
2
1
1
2
TRAVEL
PRESS SW
(LEFT)
4I-5387
A
RR
2
1
A
A
A
A
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
307-OR
307-OR
200-BK
310-PU
K973-PK
K974-PU
K975-WH
K976-BR
105-BR
326-PU
308-YL
4
6
3
2
7
8
9
1
10
5 5
10
1
9
8
7
2
3
6
4
SIG 4
SIG 3
SIG 2
SIG 1
COM
ENGINE
SPEED DIAL
7Y-5465
ATCH START
AID SW
7X-6387
ONE TOUCH
LOW IDLE SW
6I-5088
L38
UU
UU
K973-PK
K974-PU
K975-WH
K976-BR
200-BK
A755-PK
A756-BU
A757-GY
A758-BR
UU
H
L35
RH-SW
LH-SW
ONE TOUCH
LOW
IDLE SW
H
H
B
B
B
B
548-BU
198-PK
198-PK
549-PK
10
6
5
4
2
9
7
8
1
A
L33
ATCH HAMMER-AHC CONT.
SW 7X6388
ATCH CONT.
GP RH
113-2531
B
198-PK
3
2
1
PLATFORM
551-YL
549-PK
548-GY
198-PK
147-PU
550-OR
200-BK
L33
K
1
2
439-YL
586-BR
BBB
BBB
HORN SW
6I-5088
PLATFORM
2
1
1
2
ATCH-PRESSURE SW
6C6806
ATCH-BUZZER
113-4683
ATCH-SW AS.ROCKER
7X6386
YL
BR
586-BR
200-BK
NN
NN
NN
MM
308-YL
439-YL
551-YL
547-OR
548-GY
551-YL
2
1
NOTE H
3
2
1
547-OR
3
2
1
551-YL
548-GY
551-YL
SS TT
PP PP
551-YL
548-GY
547-OR
551-YL
955-BU
547-OR
551-YL
955-BU
547-OR
551-YL
548-GY
547-OR
PP
PP
TT
SS
551-YL
548-GY
551-YL
3
2
1
TT TT
ATCH BOOM DOWN
SOL. 4I6158
2
1
TT TT
1
2
547-OR
SS
ATCH HAMMER
CONT.SOL.
7Y5005
3
2
1
ATCH SERVICE
METER
6T7337
-
+
548-GY
551-YL
548-GY
551-YL
548-GY
551-YL
- +
ENGINE SPEED
CONTROL
1
2
TT
ATCH HAMMER
CONT. SOL.
116-4416
ATCH RPM REGULATOR
116-9958
K973-PK
K974-PU
K975-WH
K976-BR
200-BK
A755-PK
A756-BU
A757-GY
A758-BR
L35
L32
L32
ATCH REFUELING
PUMP RELAY
7Y-5490
20A
L31
L31
PP
PP
PP
B734-GY
200-BK
B734-GY
147-PU
198-PK
955-BU
198-PK
2
M
2
1
1
ATCH-HAMMER FOOT
SW
ATCH-PRESSURE SW
SAFETY
1
2
LL
B
PP
M
MM
L38
PP
L13
198-PK
147-PU
550-OR
L16
L29
L29
L25
L27
L30
L25
L29
L28
L27
HAMMER
A/C /HEATER
CIGAR LIGHTER
BACK UP
L25
HORN RELAY
7Y-5490
L27
KEY SWITCH
10A
20A
10A
15A
10A
10A
L10
L11
L13
L27
L26
L28
L28
L28
L26
551-YL
549-PK
548-GY
547-OR
546-BU
198-PK
1
2
3
4
5
6
547-OR
546-BU
198-PK
551-YL
549-PK
548-GY
198-PK
147-PU
550-OR
198-PK
L37
548-GY
550-OR
549-PK
546-BU
B734-GY
547-OR
550-OR
547-OR
546-BU
198-PK
3
2
1
L36
198-PK
147-PU
550-OR
551-YL
549-PK
548-GY
551-YL
548-GY
547-OR
551-YL
955-BU
547-OR
L34
102-8041
A
L34
RH-SW
LH-SW
K
K
HORN SW
ATCH CONT.GP LH
1132531
198-PK
547-OR
546-BU
198-PK
LL
LL
LL
LL
RR
RR
RR
RR
R
P
P
R
ATCH
BOOM LAMP
5I-8250
L10
CHASSIS
LAMP
5I-8251
HORN
7T-0969
HORN
7T-0970
BOOM LAMP
5I-8250
2
1
CA
B
CA
B
Y
Z
Y
Z
X
200-BK
200-BK
615-YL
615-YL
X
ATCH
CAB LAMP
5I-8250
ATCH
CAB LAMP
5I-8250
200-BK
615-YL
Z
615-YL
Z
L1
F
117-5645
BOLT
117-5645
BOLT
1
2
3
4
LOWER WIPER
6C8438
200-BK
615-YL
UPPER WIPER
6C9102
F
F
+
S
+1
-
MOTOR
MOTOR
-
+1
S
+
F
4
3
2
1
4
3
2
1
4I6158
152-BU
152-BU
4
3
2
1
952-OR
2
1
200-BK
QQ
952-OR
ATCH
LIMIT-SW
3T3132
QQ
QQ
QQ
ATCH
COMBINED SOL
200-BK
A
15A10A
WW
WW
L30
ALT BREAKER
9S-0174
L30
CHASSIS/CAB LIGHT
RELAY
7Y-5490
WIPER RELAY
7Y-5490
L26
SOLENOID
MONITOR
RADIO
BOOM LAMP
CHASSIS/CAB LAMP
VV
MAIN RELAY
3T-0376
L26
VV
BOOM LAMP RELAY
7Y-5490
WASHER RELAY
7Y-5490
ATCH WIPER/WASHER
WIPER/WASHER
TRAVEL ALARM
E/P CONT
DOME LAMP
HORN
10A
10A
10A
10A
10A
10A
START RELAY
9X-8124
10A
10A
15A
10A
10A
10A
L36
L37
PP
PP
3
2
1
548-GY
550-OR
549-PK
546-BU
B734-GY
547-OR
550-OR
B
1
2
2
1
3
2
1
J
J
J
1
2
PROVISION FOR ATCH
SW 7X-6387 OR 7X-6386
(LH CONSOLE)
PROVISION FOR ATCH
SW 7X-6388
(RH CONSOLE)
OPERATOR STATION
365-YL
19
NOTE G: USE WITH ATCH-REFUELING PUMP
B957-GN
B957-GN
B957-GN
B957-GN
168-GN
ATCH
MAIN RELAY
3T-0376
(NOTE G)
365-YL
L4
MOTOR
C
365-YL
(NOTE F)
TRAVEL SW (RIGHT)
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR RR
RR
RR
RRRRRR
RRRRRR
RR
RR
L4
ATCH
LOWER
WASHER
MOTOR
7T-8890
C
TT 115-7126 D-2
(NOTE G)
NOTE F: USE 20A AT ATCH-REFUELING PUMP
RR
RR
RRRRRR
RR
TRVEL SW (LEFT)
RR 117-8914 D-7
1
2
33
2
A
1
PLATFORM
NN 112-3336 B-1
ATCH
FINE SWING
CONT SW
7X-6386
1
2
ENGINE
SHUTDOWN SOL
3E-7985
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 330 EXCAVATOR (7Y-3902-02)
HH 7Y-5507 A-6 (NOTE A)
GG 7Y-3946 A-5 (NOTE A)
FF 111-4737 A-5 (NOTE A)
EE 7Y-8132 A-17
DD 105-9947 A-6
CC 105-9940 A-6
BB 7Y-3946 A-5
AA 7Y-8131 A-5
CABLE AS.
VV 111-4711 B-10
WIRE AS.
T 5I-8374 E-9
S 7Y-8264 F-17
R 7Y-8106 A-2
D
D
CHASSIS
DD
AA
FF
EE
CHASSIS
C
M
MM
CC
CC
BB AA
DD
HH
HH GG
FF
P 7Y-3988 B-2
N 5I-8375 F-10
M 117-4556 B-7
L 102-7902 F-12
K 7Y-3868 F-3
J 7Y-3921 E-11
H 5I-8215 D-6
G 5I-8284 C-9
F 117-5646 E-13
E 6C-9117 E-13
D 7Y-8127 C-18
C 105-9930 D-16
A 106-0025 D-7
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
D
D
C
C
3
C
3
A
A A A A
CHASSIS
BK-00 BK-00
POS
NEGNEG
POS
BATTERY
3T-5760
L16
L15
L12
L14
L17
L12
L11
L13
L12
L11
L14
L16
L15
L12
L14
L17L17
18
168-GN
B957-GN
OPERATOR STATIONOPERATOR STATION
ATCH
START AID SOL
9G-4365
11
15
2
HYD OIL LEVEL SW
BOOM RAISE PRESS SW
OPTION SOLENOID
13
5
4
16
9
10
SWING POWER CHANGE SOLENOID
COOLANT LEVEL SW
ENGINE OIL LEVEL SW
OPTION SENSOR
OPTION SW 1
HYD OIL TEMP SENSOR (ANLG)
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
ATCH
START AID
COOLANT TEMP SW
8C-3569
ENG OIL
PRESS SW
9X-4276
ALTERNATOR
100-5047
ATCH
A/C COMPR
CLUTCH SOL
117-6319
COOLANT TEMP
SENSOR
3E-5370
STARTER
MOTOR
6V-5227
ENGINE SPEED
SENSOR
3E-7886
FUEL
LEVEL
SENSOR
7Y-3848
WASHER
MOTOR
7T-8890
IMPLEMENT
PRESS SW
102-8041
A
HYD OIL TEMP
SENSOR
4I-5394
WASHER RELAY
WIPER MOTOR RELAY
CHASISS LAMP RELAY
BOOM LAMP RELAY
GND
BACKUP SW1
HARNESS CODE 2
HARNESS CODE 3
HARNESS CODE 4
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 (PWM)
ENGIN OIL SW
ALTERNATOR (R TERM)
TRAVEL ALARM
LEVEL FINISH SOL.
TRENCHING SOL.
PROPORTIONAL
REDUCING VALVE
SOL
TRAVEL SPEED
SOL
7I-1245
NOTE B: HARNESS UU IS INSERTED BETWEEN HARNESS A
AND H WHEN ATCH RPM IS INSTALLED
L
L
2
1
2
1
T
R
ALT
+
GROUND
SIGNAL
+B
C
B
A 2
1
168-GN
A L
A
2
1
MOTOR
2
1
H
L18
168-GN
B957-GN
2
1
C
W
UU 115-7125 E-4
ATCH REFUELING PUMP
STOP SW(NORMALY CLOSED)
9X4959
ATCH
SEAT WITH
SEAT HEATER
110-5265
A
1
2
1
2
2
1
ATCH
SEAT HEATER SW
7X-6386
NOTE H: CONNECT THIS WAY WHEN ATCH HAMMER
FOOT SW IS USED
1
2
L
L
A
ATCH
A/C UNIT
107-1994
1
W
S
H
J
J
J
J
S
S
L4
L6
L4
L7
L8
L3
L8
L3
L4
L8
DOME LAMP
096-0721
J
J
A
A
CAB
PLATFORMCHASSIS
CHASSIS
PLATFORM
HEATER
UNIT
107-1995
E
F
A
AC
K
HA
A
A
L6
L7
L8
L9
L5
L1
L7
L5
L3
L6
L7
L5
L2
L6
L2
L6
L1
L5
L7
L6
L7
L6
L8
L9
L5
L2
L2
L1
L1
L3
OPERATOR STATION
OPERATOR STATIONOPERATOR STATION
F
L4
L3
KEY
START SW
9G-7641
AA
6
4
3
1
5
2
7N-8008
4
6
1
3
5
2
BACKUP
GOV SW
3T-4405
L
T
4
6
1
3
5
2
10
1
2
3
4
9
6
R
C
S
B
OFF
ON
ST
L8
L9
2
3
BACKUP
RESISTOR
102-8016
PUMP
BACKUP SW
EPR VALVE SW
3T-4405
8
GROUND STRAP
7G-1060
7
5
L9
F
E
1
2
8103 YL/RD8103 YL/RD
2
1
F
PROVISION FOR
BEACON LIGHT
6 DIN 46327
GROUND
+12 VOLT
+ BATTERY
GROUND
1
2
3
2
1
ATCH
CONVERTER
108-9968
ATCH
ANTENNA
106-0036
3
1
4
2
U
U
U
U
TO RADIO
200-BK
F
L16
L15
L12
L14
25
35
14
24
5
1
2
BACKUP SW3
L21
L12
L15
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
L16
L14
22
12
33
32
40
30
19
20
34
36
6
7
8
9
29
39
38
37
20
7
8
17
12
21
6
1
22
23
24
18
3
14
2
1
1314151617 5
8
18
12 11 10 9 7 6
4 2
12 11 10 9 8 7 6 5 4 2 117 16 15
1
14
4
13
POS
NEG NEG
POS
ATCH
BATTERY
3T-5760
(NOTE A)
NOTE A: USE WITH COLD WEATHER
DISCONNECT
SWITCH
7N-0718
7N-0719(NOTE A)
YL
BU
ENG GOV
ACTR
7Y-5571
PU
BK
SIG
GND
OR
24V+
M
SIG
GND
5V+
H
L21
W
ATCH
REFUELING SW
5C-6108
W
ATCH
TRAVEL ALARM
3T-1444
ATCH
REFUELING
PUMP
102-6168
L42
V 6C-9362 F-2
MOTOR
ATCH FINE
SWING SOL
7I-0124
L42
L42
L42
LL 114-4876 F-3
JJ 7G-1060 F-14
365-YL
168-GN
168-GN-14
B957-GN
323-WH-14
JJ
JJ
BBB 6C-6824 B-2
AAA 116-8179 F-18
QQ 118-0075 F-1
Q 113-2484 E-17
V
L41
L40
L39
L41
L40
L39
168-GN
PROVISION FOR
ATCH CONT SW
7X6386 OR 7X6387
N
N
MM
TT
2
1
FINE SWING
NOTE
ATCH FINE
SWING RELAY
7Y-5490
M
G
L15
M
W 105-9934 F-17
MM 113-9860 B-1
ATCH
STARTER
MOTOR
3T-8946
(NOTE A)
27
V
T
3
5
XX
XX
XX 111-4710 B-7
SS 115-7124 D-1
PP 117-2973 B-4
ENGINE
PUMP CONTROL
102-8010
13
BOOM RAISE
PRESS SW
102-8042
MOTOR
Z 117-7029 F-1
Y 117-7028 F-1
BLOCK AS.
7Y-5499
10
9
8
U 7Y-8105 E-14
WW 111-4709 B-11
REFUELING PUMP
D
D
X 6C-9134 F-1
265-BK
L24
L24
L18
L19
L18
L20
L20
L18
L19
L20
L19
L18
L22
L22
L19
L17
G
NOTE B
B 117-7253 D-4
M
RR
B957-GN
168-GN
168-GN
B957-GN
2
ATCH REFRIGERANT
SW 114-5334
AAA
168-GN
B957-GN
1
AAA
B957-GN
168-GN168-GN
B957-GN
Q
Q
323-WH
365-YL
Q
RR
ATCH REFUELING PUMP
START SW(NORMALY OPEN)
9X4959
MONITOR
ACTION ALARM
SPEED
CHANGE SW
5I-8368
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 CONTROLLER CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CIRCUIT.
START AID CIRCUIT.