320b excavator electrical system
TRANSCRIPT
©2000 CaterpillarAll Rights Reserved
Printed in U.S.A.
SENR9278-03March 2000
320B ExcavatorElectrical System
7JR1-UP1XS1-UP2AS1-UP5MS1-UP9WS1-UP6LW1-UP3YZ1-UP
Code Description of Problems1301 Engine oil pressure is too low.1302 Engine coolant temperature is too high.1303 Hydraulic oil temperature is too high.1304 Air filter is clogged.1305 Battery voltage is not normal.2201 Governor actuator feedback sensor circuit is open or shorted to battery voltage.2202 Governor actuator feedback sensor circuit is shorted to body ground.2301 Governor actuator feedback signal is not stable.2302 Governor actuator feedback signal deviates.2303 Governor actuator does not move.2304 Calibration data error.3201 Monitor RAM is not normal.4101 Electric power supply to the controller is too much (43 volts).4102 Over-current in proportional reducing valve.4103 Proportional reducing valve circuit is open.4104 Monitor power supply (digital output) over current.4105 Over-current in digital output (trenching solenoid).4106 Over-current in digital output (fine control solenoid).4107 Over-current in digital output (travel speed change solenoid).4108 Over-current in digital output (travel alarm).4109 Spare solenoid 1 (digital output) over current.410A Over-current in digital output (swing brake solenoid).410B Spare solenoid 2 (digital output) over current.4201 Engine speed is not normal.4202 Engine coolant temperature sensor is shorted to body ground.4203 Hydraulic oil temperature sensor is shorted to body ground.4204 PWM sensor of pump delivery pressure is shorted to body ground.4205 Spare PWM sensor 1 is shorted to body ground.4206 Spare PWM sensor 2 is shorted to body ground.4207 PWM sensor of pump delivery pressure is open in circuit.420A Fuel sensor is shorted to body ground420B Fuel sensor is open or shorted to battery voltage.420C Electric power supply is to low (below 23 volts).420D Electric power supply is to high (above 32 volts).420E Engine speed dial is not in one of the 10 specified positions.4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal).4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal).4303 Engine stalls.A201 Monitor communication is not normal.A202 Monitor takes too much time to respond to controller's signal.A203 Communication is abnormal in controller.
Real Time Error Codes
Wire DescriptionWire
NumberWire Color
Description Wire Number
Wire Color
Description
Power Circuits Accessory Circuits (Continued)101 RD Bat(+) 546 BU Aux Hyd - Rotate CW
103 RD Doom Lamp 547 OR Aux Hyd - Rotate CCW
105 RD Key Sw 548 GY Aux Hyd - Open
107 RD Eng Shut 549 PK Aux Hyd - Close
109 RD Alt Output(+) Term. 575 YL Wiper. Aux (Park)
111 RD Aux Ckt 576 PK Wiper.Aux(Low)
112 PU Main Power Rly Output 576 BU Washer.Aux
113 OR Opr Mon Panel VMIS B+ Switched 586 BR Aux Hyd . Close
114 RD Warning Horn (Forward) A587 YL Power Window Cont To Safety Sol Relay
115 PK Cab/Chassis Lamp A588 GN Safety Sol Relay To Sol
118 GY Washer/Wiper C537 GN A/C Photo Sensor + Sig
120 YL Converter C538 OR A/C Photo Sensor. Sig
124 GN A/C Lighting Circuits129 BU Cigar Lighter 607 PK Flood Lamp - Front
135 BU Aux Ckt 615 YL Cab Flood Lamp/Rops
139 OR Aux Ckt 616 BU Bucket Flood Lamp/Boom Flood Lamp
140 BU Lubricator 633 BU Attach Lighting Ckt
145 BU Aux Ckt 638 WH Rotary Beacon
147 PU Flow Cont/Fine Swing Solenoid Control Circuits149 PU Boom Lamp 763 BU Torque Converter SW
150 RD Hyd Lock SW/ Hyd Lock Sol 779 WH Coupler Engage Sal
151 BN Aux Ckt 780 PU Coupler Disengage Sal
152 BU Aux Ckt 786 GN Eng Speed Cant. Hi Press SW
154 RD Aux Ckt 788 YL EngSpeed(+)
168 RD Aux Ckt 791 PK Eng Speed Cont. Lo Sol
172 RD Aux Ckt A755 PK Throttle SW #1
176 BU Aux Ckt A756 BU Throttle SW #2
176 YL Aux Ckt A757 GY Throttle SW #3
177 RD Main Brkr A758 BR Throttle SW #4
180 BN Aux Ckt A761 PU Electronic Pump Cont Throggle Ground
185 YL Aux Ckt A762 PU Electronic Pump Cant Eng Speed Ground
189 RD Aux Ckt A768 BU Pump Control Valve #1 (+)
191 WH Aux Ckt A769 GY Pump Control Valve #2 (-)
196 BU lnsp Lamp A770 PK Electronic Pump Cont Bypass SW To Resistor
198 PK Aux Ckt A771 PU Float SW
Ground Circuits F771 OR Backup SW
200 BK Main Chassis F772 WH Backup SW
210 BK ConverterOutput(24/12 Volt) F773 OR Governor Accel
235 BK Electronic Pump Ctrl Gnd F774 WH Governor Decel
Basic Machine Circuits F846 PU LED Driver 1
306 GN Starter Relay Coil G848 GN LED Driver 2
307 OR Key SW To Neutral Start SW G872 PU Espar Cab Heater to Power Switch
308 YL Main Power Relay Coil 952 OR Hammer SW B
310 PU Start Aid SW To Start Aid Sol 954 GN HammerSWA
320 OR Horn Relay Coil To SW 955 RU Hammer Sol A
321 BR Backup Alarm Lamp Travel Alarm K904 GN Pump Discharge - Signal
326 RD Key SW "C" Term. K905 RD Pump Discharge. +B
386 PK Air Shutoff Solenoid Enable K906 GN Swing Brake Sol - Signal
Monitoring Circuits K907 RU Swing Brake Sol - +8
403 GN Alternator (R) Term. K909 BU Backup SW +8
405 GY Opr Mon Oil Press. (Low Setting) K911 PK EJP Controller - RS4BS (+)
412 BU OprMon Cool Flow K912 GN E/P Controller - RS4BS (-)
430 BU Opr Mon Air Filter K915 GN Fine Swing SW - E/P Controller
487 OR Hyd Oil Flow SW K997 BU +V Sensor, EMS-Il
491 PK VMIS Hyd Oil Temp Sensor L908 OR Controller RS-232C Tx
492 GY VMIS Coolant Temp Sensor Signal L909 BU Controller RS-232C Rx
495 GN VMIS Fuel Level Signal L968 OR Electronic Pump Control Ps Valve (.)
496 WH Opr MOn Panel Hyd Oil Level L969 WH Electronic Pump Contral Ps Valve (+)
A424 WH Press. Transducer 1 Signal L970 GY Electronic Pump Cant To SW Common Return
A425 YL Press. Transducer 2 Signal L971 GN Electronic Pump Cant To Travel Pressure SW
C468 BU Engine Oil Level L972 BU Low Idle SW
Accessory Circuits L973 GN Fine Swing Cont Relay To Sol Valve
506 PU Washer-Front L974 GN Electronics Pump Ctrl Boom Raise Press SW
508 PU Radio Speaker - Left L975 PK Start Aid Cont Lamp 1 Output
509 WH Radio Speaker - Left (Commom) L977 YL Trenching Sol
511 BR Radio Speaker - Right L978 GY Level Finish Sol
512 GN Radio Speaker. Right (Common) N923 GY Backup Mode Switch 1
519 PK Thermostat To Refrigerant Press. SW N924 WH Backup Mode Switch 2
524 BU Wiper - Left (Low)
Resistor, Sender and Solenoid SpecificationsPart No. Component Description Resistance (Ohms)¹3E-1906 Solenoid: A/C Clutch 17.6 ± 0.6
3E-6332 Solenoid: Valve Start Aid 6.00
4I-5394 Sender: Hydraulic Oil Temp
20824 - 25415 @ 0°C6134 - 7496 @ 25°C3989 - 4875@35°C2224 - 2718 @ 50°C973 - 1189 @ 75°C475 - 522 @ 100°C221 - 269 @ 125°C
7Y-8242 Resistor: Timer Relay 47.0 ± 4.7
8C-3663Solenoid: Engine Shutdown Start (Latch) Coil Stop (Unlatch) Coil
1.55 ± 0.1510.3±1.03
102-8017 Resistor: Backup 52.0 ± 2.6
111-9916 Solenoid: Engine/Pump Control Flow Control 11,7 ± 1.2
121-1490 Solenoid: Level Finish Trenching 32.0 ± 3.2
121-1491
Solenoid: AC1 AC2 Hydraulic Lock Swing Brake Travel Speed
32.0 ± 3.2
¹ At room temperature unless otherwise noted.
Off Machine Switch SpecificationPart No. Function Actuate Deactuate Contact Position
3E-6449 Coolant Temperature (Start Aid) 38 ± 3° C(100 ± 5°F)
27” C Mm(80.6° F) Normally Closed
3E-6455 Engine Oil Pressure 90 21 kPa(13 ± 3.0 psi)
70 ± 21 kPa(10 ± 3.0 psi)
A-B Normally OpenA-C Normally Closed
106-0179 Implement PressureTravel Pressure
1520 ± 98 kPa(224.4 ± 14.21 psi)
1127 kPa MIN(163.5 psi MIN) Normally Open
106-0180 Boom RaisePressure 2646.00 ± 196.00 kPa(383.77 ± 28.43 psi)
2156.00 ± 196.00 kPa(312.70 ± 28.43 psi) Normally Open
114-5333 Refrigerant Pressure (AC) 275 to 1750 kPa ¹(40 to 255 psi)
—— Normally Open ²
131-9203 Aux Hydraulic Pressure 3500 kPa MAX(507.6 psi)
3000 ± 150 kPa(435.1 ±21.8 psi)
A-B Normally OpenA-C Normally Closed
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.
Component LocationComponent Schematic
LocationMachine Location Component Schematic
LocationMachine Location
A/C Unit H-4 10 Seat W/Seat Heater (Atch) F-4 E
Alarm - Travel (Atch) G-12 2 Sender - Hyd Oil Temp A-5 5
Alternator B-11 11 Sensor - A/C Photo D-7 A
Batteries I-11 13 Sensor - Engine Speed B-11 20
Block - Terminal F-9 D Sensor - Fuel Level A-5 6
Breaker - Alternator I-11 D Sensor - Overload Warning Device O.W.D. A1 F-11 D
Breaker - Fuel Heater E-8 D Sensor - Pump Discharge Press B-8 26
Breaker - Main I-11 D Socket - 12v B-6 15
Breaker - Warming Windshield D-8 D Solenoid - A/C Clutch C-11 27
Cigar Lighter C-7 A Solenoid - AC1 I-8 39
Control - Overload Warning Device O.W.D. G-5 A Solenoid - AC2 I-8 39
Control - Wiper B-7 A Solenoid - Aux Pedal On/Off E-1 39
Controller - Aux/Hyd (Atch) H-9 33 Solenoid - Engine Shutdown B-11 11
Controller - Engine/Pump E-2 2 Solenoid - Flow Control I-8 29
Convertor C-6 15 Solenoid - Fine Swing E-10 28
Diode G-10 7 Solenoid - Hammer 2 I-6 30
Fuse - Block I-1,2,3 C Solenoid - High Press A3 F-10 39
Ground - Cab B-7 A Solenoid - Hyd Lock E-1 G
Ground - Chassis A-3 23 Solenoid - Level Finish A-8 33
Ground - Chassis I-12 D Solenoid - Rl/R2 I-7 39
Ground - Chassis A-5 E Solenoid - Start Aid (Atch) I-12 31
Ground - Platform D-1 F Solenoid - Swing Brake E-10 32
Ground - Relay Panel G-11 D Solenoid - Travel Speed A-8 33
Ground - Strap Chassis/Platform I-5 2 Solenoid - Trenching A-8 33
Horns A-2 16 Switch - Air Cleaner H-12 35
Joystick - Multiswitch F-3,G-11 A Switch - Backup D-2 B
Meter - Service C-7 A Switch - Boom Raise Press D-10 34
Monitor C-7 A Switch - Coolant Level I-12 36
Motor - Govener Assembly A-11 20 Switch - Disconnect I-11 D
Motor - Lower Wiper F-1 F Switch - Engine Oil Level A-11 18
Motor - Starter A-11 20 Switch - Engine Oil Press B-11 38
Motor - Upper Wiper B-6 22 Switch - Swing Control D-4 33
Motor - Washer I-12 D Switch - Hyd Oil Filter A-5 E
Pump - Auto Lubrication (Atch) H-12 7 Switch - Hyd Oil Level A-5 E
Pump - Heater Fuel (Atch) D-7 D Switch - Implement Press D-10 39
Pump - Refueling A-3 D Switch - Neutral Start Limet H-4 C
Relay - Boom Lamp I-10 D Switch - Overload Warning Device O.W.D. D-4 B
Relay - Cab/Chassis Lamp I-10 D Switch - Panel F-2 B
Relay - Fuel Heater E-8 D Switch - Pressure I-7 39
Relay - Horn I-10 D Switch - Prox I-7 39
Relay - Hyd Lock Solenoid I-10 D Switch - Refrigerant Low Press C-11 24
Relay - Main G-10 7 Switch - Refueling (Atch) A-5 40
Relay - Neutral Start F-7 D Switch - Refueling Start (Atch) A-4 41
Relay - Refueling 1 (Atch) A-3 23 Switch - Refueling Stop (Atch) A-4 41
Relay - Refueling 2 (Atch) A-3 23 Switch - Seat Heater (Atch) D-4 B
Relay - Start F-8 D Switch - Start Aid (Atch) D-5 B
Relay - Start Disable E-8 D Switch - Start Aid Coolant Temp (Atch) B-11 24
Relay - Heater F-8 D Switch - Key E-2 B
Relay - Timer F-7 D Switch - Travel Press D-10 39
Resistor - Backup I-11 24 Switch - Windshield B-7 A
Machine locations are repeated for components located close together.
A = Located inside of cab.
B = Located inside of right console.
C = Located inside of left console.
D = Located around relay panel.
E = Located around hydraulic oil tank.
F = Located around pilot manifold.
G = Located under platform.
H = Located inside dash.
Related Electrical Service ManualsForm Number
Alternator: 132-2156 SENR4757
Electric Starting Motor: 104-7040 Consist: 6V-5821 SENR3581
Engine/Pump Control: SENR9291
Starting and Charging: SENR9292
Title
Connector LocationConnector Number Schematic
LocationMachine Location
CONN 1 F-12 DCONN 2 F-12 DCONN 3 G-12 DCONN 4 G-12 DCONN 5 H-11 DCONN 6 G-11 DCONN 7 G-11 DCONN 8 A-11 1CONN 9 F-9 DCONN 10 I-7 29CONN 11 I-7 29CONN 12 A-6 ECONN 13 C-6 21CONN 14 G-6 FCONN 15 G-6 FCONN 16 G-6 FCONN 17 H-6 FCONN 18 H-6 FCONN 19 H-5 FCONN 20 G-5 FCONN 21 F-5 BCONN 22 F-5 BCONN 23 F-5 BCONN 24 F-5 BCONN 25 C-5 24CONN 26 C-5 FCONN 27 C-4 FCONN 28 C-4 FCONN 29 A-4 23CONN 30 A-4 7CONN 31 A-4 7CONN 32 F-4 BCONN 33 F-4 BCONN 34 F-4 BCONN 35 H-4 CCONN 36 H-3 CCONN 37 H-3 CCONN 38 H-3 CCONN 39 H-3 CCONN 40 H-3 CCONN 41 A-3 7CONN 42 B-3 9CONN 43 B-2 9CONN 44 H-2 CCONN 45 H-2 CCONN 46 SIS Connector H-11 D
The connectors shown in this chart are for harness to harness connectors. Connectors that join a harness to a component are generally located at or near the component. See the Component Location Chart.
E98059
Machine Harness Connector and Component Locations
A
3
4
5 68
9
10
11
12
1415
13
16
B
C
D
E1
2
17
18
1920
21
22
23
24
25
26
27
2829
30
31
32
17
35
33
34
36
38
7
F
39
40
41
A
3 45 68
9
10
11
12
14
15
13
16B
C
DE
12
17
18 19
20
21
22
23
24252627
28
29
3031
3235
33
343638 7
F
3940
41
12
16
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
PressureSymbol
TemperatureSymbol
LevelSymbol
FlowSymbol
A AA
2
A AA1
2
325-PK-14C 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
SocketPin
Pin or Socket Number
Wire, Cable, or Harness Assembly Identification
Single Wire Connector
Circuit Number Identification
Wire Gauge
WireColor
Plug Receptacle
9X-1123
Component Part Number
Electrical Schematic Symbols And Definitions
11 12 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.
200-BK-14200-BK-14
386-PK-18
AF306-GN-18
AF 162-0341 E-9
2341
405-GY-18578-BU-18200-BK-14
ATCH. AUX. CKT
ATCH FUELHEATER
135-6299 (NOTE H)
12 200-BK-14
AK
G872-PU-14
200-BK-18
200-BK-18
200-BK-18
TO WARMING WINDSHIELD
112-PU-14
YY
STARTERMOTOR128-5621
USED FOR ARCTIC PACKAGE
B (NOTE H)
101-RD-2
301-BU-10
MOTOR
ALT R
B+
CHASSIS
B-
304-WH-8GS
MTRBAT101-RD-2
RD-00RD-00
200-BK-4200-BK-18
200-BK-2
BK-00
ALTERNATOR159-9901 B
B
HH
AA
EE
200-BK-2
109-RD-2
403-GN-18
B
B (NOTE H)
304-WH-8
G872-PU-14
101-RD-14
7
3
306-GN-18
101-RD-12
4
1
145-BU-12
386-PK-18
15A
40A
5A
15A
143-BR-12
200-BK-14
145-BU-12
405-GY-18578-BU-18
578-BU-18405-GY-18
112-PU-14
G872-PU-14
101-RD-14
200-BK-14
START HEATERESPAR
111-4871
200-BK
START DISABLERELAY
111-4871
SW ONHEATER
SW OFFHEATERINDICATOR
ON HEATER
SW ON/OFFFUEL HEATER
330-YL-18330-YL-18
INDICATORON FUEL HEATER
WARMING WINDSHIELDRELAY
125-1302FUEL HEATER
BREAKER3T-2662 WARMING WINDSHIELD
BREAKER8D-7265
ATCH. PANEL GPARCTIC
160-2147 (NOTE H)
158-BR-14158-BR-14
8
6
10
12
2
9
5
11
4
511
12
323-WH
BU
102136
987
323-WH
323-WH323-WHGY
YL
BR
RDPK
OR
BK
PUGNWH
4+
24 V
DC
OU
T-W
ATE
R P
UM
P
5 11 12 10 2 1 3 6 7 8 9
ATCH HEATER GP136-9001 (NOTE H)
+24
VD
C IN
-FU
EL
HE
ATE
R
FU
EL
PU
MP
FU
EL
PU
MP
FU
EL
FIR
ED
HE
ATE
R-E
NA
BLE
+24
VD
C IN
-FU
EL
HE
ATE
RG
RO
UN
D
AF
AF
FUEL HEATERRELAY
111-4871
AF
323-WH323-WH
ATTACHMENTHEATER FUEL PUMP
136-7707 (NOTE H)
PUMP
NOTE H : USE WITH ARCTIC PACKAGE
ANTI DRIFT PRESS SW(VA BOOM)
ANTI-DRIFT SOL(VA BOOM) 200-BK
H918-WH
1220
0-B
KH
918-
WH
200-
BK
H91
8-W
H
H91
8-W
H
21
A58
7-Y
L
2 1
12
N923-GY-18
N923-GY-18
N923-GY-18N923-GY-18
N923-GY-14
G848-GN-18
G848-GN-18
G848-GN-18G848-GN-18
F846-PU-18
F846-PU-18
200-
BK
-14
200-
BK
-18
200-
BK
-18
200-
BK
-18
200-
BK
A85
0-W
H-1
8A
849-
OR
-18
200-
BK
200-
BK
-18
F846-PU-18
200-
BK
N92
3-G
Y-14
200-
BK
N92
3-G
Y
952-
OR
-18
200-
BK
-18
200-
BK
-18
N919-GN-18N920-BU-18
N924-WH-18
A756-PU-18
N921-YL-18N922-OR-18
200-BK-18
34567
2
8
A755-PK-18
A757-WH-18
81273456
1
8
NN
NN
K976-OR-18
954-GN-18
K975-WH-18K974-PU-18K973-BR-18
A758-BR-18
N924-WH-18
PROX SW3T-3132
AC2(ON/OFF)121-1491
SOLR1/R2
125-8075
F846-PU-18
AUX PRESSSW
131-9203
951-
PK
-18
A B
955-
BU
-18
C
1 221
585-
YL-
18
A84
8-P
K-1
8A
847-
YL-
18
NN NNNN
PP
AC1(ON/OFF)121-1491
PP
200-
BK
-18
12
NN
1 2
950-
BR
-18
200-
BK
-18
L970
-GY-
18
C
BA
PRESSURE SW106-0179
952-
OR
-18
1 2
NN
N92
3-G
Y-18
952-
OR
-18
N92
3-G
Y
N92
3-G
Y-14
952-
OR
-18
952-
OR
-18
952-
OR
-18
952-
OR
-18
200-
BK
-14
952-OR-18
K976-OR-18K975-WH-18K974-PU-18K973-BR-18
N919-GN-18N920-BU-18N921-YL-18N922-OR-18
546-BU-18
548-GY-18549-PK-18
547-OR-18
952-OR-18N923-GY
G848-GN-18
A849-OR-18A850-WH-18
951-PK-18
950-BR-18
A847-YL-18A848-PK-18
F846-PU-18
585-YL-18200-BK
2
5
2216104211593
24
20
19
6
MEDIUM PRESS SOL R2
18
111723
12
17
8
13
14
THROTTLE POS SW
NN
E/P CONTRE/P CONTRE/P CONTRE/P CONTR
THROTTLE POS SW
AUX PILOT MAN AC1
FLOW CONTROL SOL
RH - JOYSTICK
GROUNDAUX PILOT MAN AC2
PROX SW
MEDIUM PRESS SOL R1
LH - JOYSTICKLH - JOYSTICK
HAMMER 2 SPEED SOL
FLOW CONTROL SOL
ROCKER SW CSL
RH - JOYSTICK
PRESSURE SWAUX CKT POWER SUPPLY
THROTTLE POS SWTHROTTLE POS SW
L34
K976-OR-18K975-WH-18
ATCH-AUX/BACKUPRELAY145-6907
200-BK-14
L970-GY-18
N924-WH-18
546-BU-18547-OR-18548-GY-18549-PK-18
K974-PU-18K973-BR-18
954-GN-18
955-BU-18
G848-GN-18F846-PU-18
952-OR-18N923-GY-14
A755-PK-18A756-PU-18A757-WH-18A758-BR-18
ATCH-AUX/HYDCONTROLLER122-9897
A58
7-Y
L-18
A58
7-Y
L-18
A58
7-Y
L-18
L970-GY-18
200-BK-14200-BK-14
118-GY524-BU
638-WH
524-BU118-GY
615-YL-18
615-YL
L55
L54
23
K97
3-B
R-1
8K
974-
PU
-18
K97
5-W
H-1
8K
976-
OR
-18
4
L38
JJ
A A
JJ
14 3 2
A75
8-B
R-1
8A
757-
WH
-18
A75
6-P
U-1
8A
755-
PK
-18
1
A58
7-Y
L-18
5 64231
42351
A587-YL-18
6
N92
3-G
Y-18
G84
8-G
N-1
8F
846-
PU
-18
955-
BU
-18
952-
OR
-18
RA
BB
IT
2 W
AY
1 W
AY
PS
961-
BR
-18
7
8
N923-GY-18
N923-GY-18
N92
3-G
Y-14
198-
PK
-18
549-
PK
-18
198-
PK
-18
548-
GY-
18
A587-YL-18A587-YL-18
A587-YL-18
A587-YL-18
A587-YL-18
955-BU-18
955-BU-18
633-BU-18
954-GN-18
200-
BK
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200-BK
200-BK
200-
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200-
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200-
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200-
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200-
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200-BK-14
200-BK-18
200-BK-18
576-PK-18
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AUX PEDALON/OFF SOL
21
200-BK-18
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N92
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961-BR-18
547-
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198-
PK
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546-
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198-
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200-
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320-
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151-
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150-
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150-
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154-
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306-
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200-
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21
A718-PU-18
309-GY-18616-BU
322-GY-18607-PK-18
304-WH-8
877-YL-4
101-RD-4
109-RD-6
147-PU-18
F774-WH-18F773-OR-18A761-PU-18K904-GN-18430-BU-18
K906-GN-18A771-PU-18
763-BU-18
111-RD-14
112-PU-14112-PU-14
189-RD-14189-RD-14
112-PU-14
A769-GY-18491-PK-18496-WH-18495-GN-18
112-PU-14
403-GN-18788-YL-18
A762-PU-18C468-BU-18405-GY-18492-GY-18519-PK-18
321-BR-18412-BU-18
111-RD-14
487-OR-18
200-
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310-PU-18
107-RD103-RD-18
320-
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168-RD-14140-BU
200-BK
151-
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AK
200-BK-18
200-BK-18
578-BU-18
150-
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150-
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150-
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150-
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112-PU-6
K909-BU-18A587-YL-18A588-GN-18
196-
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151-GN-18
150-
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308-YL-18307-OR-18
791-PK-18615-YL
786-GN-18149-PU
320-OR-18114-RD-18
K90
5-R
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4
A770-PK-18
112-PU-14112-PU-14
200-BK
112-PU-14
K90
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150-
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112-
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308-YL-18112-PU-14112-PU-14112-PU-14
140-
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149-
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147-
PU
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105-
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107-
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114-
RD
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191-
WH
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954-GN-18
115-
PK
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200-
BK
-18
200-BK-18
103-RD-18
A587-YL-18
403-GN-18
A771-PU-18
120-
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118-
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788-YL-18A762-PU-18763-BU-18412-BU-18
C468-BU-18
N924-WH-18
321-BR-18405-GY-18492-GY-18491-PK-18495-GN-18430-BU-18496-WH-18
K904-GN-18A761-PU-18487-OR-18
124-
GN
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129-
BU
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235-BK-14
200-BK-14
200-BK
961-BR-18
786-GN-18791-PK-18308-YL-18
307-OR-18578-BU-18
K906-GN-18A768-BU-18A769-GY-18A770-PK-18F774-WH-18F773-OR-18K909-BU-18310-PU-18
A588-GN-18
A588-GN-18
575-YL-18
152-BU-18
107-RD196-BU
320-OR-18
151-GN-18
129-BU-18
118-GY
512-GN-18511-BR-18509-WH-18508-PU-18
519-PK-18
952-
OR
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G84
8-G
N-1
8
954-
GN
-18
N92
3-G
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955-
BU
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N92
4-W
H-1
8
512-
GN
-18
F84
6-P
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8
A58
7-Y
L-18
198-
PK
-18
200-
BK
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546-
BU
-18
L970
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18
511-
BR
-18
547-
OR
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548-
BU
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508-
PU
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200-BK-18
509-
WH
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200-BK-18200-BK
200-BK-18
779-WH-18
519-
PK
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124-
GN
-18
124-
GN
-18
779-WH-18
124-
GN
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779-WH-18779-WH-18
A424-WH-18A425-YL-18
780-PU-18780-PU-18780-PU-18
780-PU-18
LOW PRESSURESOL (A1)121-1491
12
HIGH PRESSURESOL (A2)156-9513
HIGH PRESSURESOL (A3)156-9513
780-PU-18
780-PU-18
A
2
113-
OR
-18
185-
YL-
1810
5-R
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9-B
U-1
811
8-G
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124-
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403-GN-18
403-GN-18
403-GN-18403-GN-18
147-
PU
-18
200-
BK
-18
140-
BU
149-
PU
168-
RD
-14
114-
RD
-18
151-
GN
-18
320-
OR
-18
196-
BU
590-
GY-
1850
1-G
N-1
8A
586-
OR
-18
107-
RD
786-
GN
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791-
PK
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113-
OR
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308-
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18
112-
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307-
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105-
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A75
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549-
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A75
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8
576-
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575-
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18
112-
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578-
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112-
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112-
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112-
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124-
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F77
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771-
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615-YL-18
235-
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615-YL-18
235-
BK
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235-
BK
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308-
YL-
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758-
BR
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A75
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K91
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911-
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F77
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907-
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403-
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487-
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496-
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430-
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495-
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491-
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492-
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18
405-
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412-
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763-
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200-BK-18
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200-
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200-
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200-
BK
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L6
320-
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N923-GY-18
2
386-
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306-
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L29
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147-PU-18
111-
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140-BU149-PU
168-RD-14114-RD-18
189-
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151-GN-18
320-OR-18
112-
PU
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196-BU
112-
PU
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114-RD-18168-RD-14
151-
GN
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112-PU-14112-PU-14
2
112-PU-14
112-
PU
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A
185-
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18
779-WH-18
780-PU-18200-BK-18 200-BK-18
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112-
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200-BK
112-
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112-
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140-
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105-
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168-
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191-
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129-
BU
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118-
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124-
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120-
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961-BR-18
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151-GN-18200-BK-18200-BK-18200-BK-18607-PK-18
615-YL
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200-
BK
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200-BK-18
149-PU
200-
BK
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K909-BU-18
307-OR-18
200-BK-18
K909-BU-18
200-BK-18200-BK-18
306-GN-18
306-GN-18
200-BK-18
200-
BK
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K90
9-B
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770-
PK
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791-
PK
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615-
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607-
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151-
GN
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587-
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18
196-
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320-
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2
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310-
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200-
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308-
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18
1
308-
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112-PU-14112-PU-14
386-PK-18
149-PU140-BU
306-GN-18
103-RD-18
147-PU-18
1432
200-BK-14
200-BK-14
ROTARY SW155-2715
BK
BU
403-GN-18
6 12 354
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8
311-
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310-
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12 11 6 1 3527894
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177-
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6 7 4
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12410 26
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A
12
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35 4 13
A/C UNIT126-3375
S
62 1
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10A10A15A10A10A10A
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KEY SWREFUELING PUMP
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10A
10A30A10A10A10A10A
10A
A761-PU-18
10A10A10A10A
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HYD LOCK SOL10A
SHUTDOWNO.W.D.AUX CKT SW PANEL
LUBRICATOR
306-GN-18
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S
65147-
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8965
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98
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115-
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198-PK-18198-PK-18
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OR
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154-
RD
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172-
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18
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RD
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150-
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113-
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ME
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135-
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633-
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210-
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511-
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509-
WH
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189-
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189-
RD
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547-OR-18
546-BU-18
586-BR-18
200-
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A425-YL-18
112-
PU
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112-
PU
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308-
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18
113-OR-18113-OR-18
AUX CKT
512-
GN
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198-
PK
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547-
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198-
PK
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113-
OR
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113-
OR
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3
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111-
RD
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150-
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154-
RD
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189-
RD
172-
RD
-18
115-
PK
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177-RD-14
D
172-
RD
-18
154-
RD
-18
150-
RD
-18
113-
OR
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115-
PK
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C
177-RD-14
150-RD-18
L908L909
235
150-RD-18
K905-RD-14
MM F
10
200-BK615-YL
CAB LAMP5I-8250
1 23
A424-WH-187
45
615-YL200-BK
6
A425-YL-18
L17
176-YL
308-YL-18
78
J
A
308-
YL-
18
306-GN-18
586-BR-18
L56
306-GN-18
200-BK
ATCH START AIDCOOLANT TEMP SW.3E-6449
21
B
ATCH STARTAID SOL3E-6332
T
147-
PU
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546-
BU
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J JJ J
HYD LOCK SW 147-PU-18
LUBRICATOR
SW PANELAUX CKT
176-
YL
SHUTDOWN
177-
RD
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200-BK-14
200-BK-14
306-
GN
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AIH COOLANTTEMP SENSOR125-4812
1
B
21
GR
OU
ND
ON
(KE
Y)
12
AIR CLEANER SW 109-9330
PUMP DISCHARGEPRESS SENSOR106-0178
SIG
NA
L
GR
OU
ND
+B
BK
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BR
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YL-
18B C
AIR HEATER6I-4753
T
B
GND
F/B+B
ACCEL
B B
B
BK
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C
21
DECEL6
B
B
ENG GOVACTUATOR106-0126
A A
HH
B
CB
BB
CC
C
C
C
L57
KEY
L57
REFRIGERANTLOW PRESS SW 114-5333
ALTERNATOR 9W-3043
ATCH AUTOLUBRICATION PUMP127-5264
ATCHTRAVEL ALARM 3E-7738
ENG OIL LEVEL SW111-4759
12
2
2
1
N92
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10A
A756-PU-18
615-YL
B
B
191-
WH
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COOLANTLEVEL SW096-0744
12
T
COOLANT TEMPSENSOR 4I-5394
MOTOR
C B
BATMTR
SG
B
STARTERMOTOR104-7040
B-
WASHER 7T-8890
A
21
ENGSHUTDOWN SOL 8C-3663
ENG OILPRESS SW 3E-6455
CHASSIS
BK-18RD-18
ENG SPEEDPICKUP 6V-2455
B
BATTERY 3T-5760
POS NEGNEGPOS
A
CBA
BU-18
B+
RDALT
A/C CLUTCHSOL3E-1906
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HYD LOCK SOL
E/P CONT
L57
N92
4-W
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8
K90
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N-1
8
200-
BK
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200-
BK
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200-
BK
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200-
BK
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200-
BK
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A769-GY-18A768-BU-18
320-OR-18
763-BU-18
200-BK-18200-BK-18200-BK-18
L972-BU-18200-BK-18
549-PK-18198-PK-18
MULTISWITCH JOSTICK 122-4828
RIGHT SW
548-GY-18198-PK-18
LEFT SW
H
15A
10A
114-RD-18
10A
A76
8-B
U-1
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769-
GY-
18
10A10A10A
10A10A10A10A30A10A
10A
FLOW CONT SOL
307-OR-18
BOOM LAMP
REFUELING PUMPKEY SW
DOME LAMP
101-RD-4304-WH-8
15A
311-WH-18
BACKUP
HORN
403-GN-18
10A
309-GY-18492-GY-18
A718-PU-18
A762-PU-18788-YL-18405-GY-18
A/C /HEATERCIGAR LIGHTER
F774-WH-18F773-OR-18A761-PU-18
WASHER/WIPERATCH-AUX CKTCONVERTERCAB/CHASSIS LAMPATCH-AUX CKT
C468-BU-18
FINE SWING SOL
549-
PK
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198-
PK
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548-
GY-
1819
8-P
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854
9-P
K-1
8
103-RD
42
A
H
31
A587-YL-18
A770-PK-18
200-
BK
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0-B
K-1
820
0-B
K-6
200-BK-4
A718-PU-18200-BK-18
492-GY-18200-BK-18
309-GY-18
403-GN-18
200-BK-6
200-
BK
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B
405-GY-18788-YL-18
A762-PU-18
200-
BK
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304-WH-8
RD-00RD-00
200-BK-4200-BK-6200-BK-10
200-BK
200-BK-18
200-
BK
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200-BK-18200-BK-18
200-BK-18
200-BK-18
301-BU-10
513-OR-18200-BK-18
200-BK-10301-BU-10
405-GY-18200-BK-18
788-YL-18A762-PU-18
308-YL-18200-BK-18
K90
9-B
U-1
8
12
B
6
101-RD-4
308-
YL-
1830
8-Y
L-18
112-PU-6
L55
L54
L54
A587-YL-18A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18615-YL
308-
YL-
18
786-GN-18149-PU
320-OR-18114-RD-18
A770-PK-18
K909-BU-18196-BU
ATCH ROTATINGBEACON SW
200-BK
A75
8-B
R-1
8
POS NEG NEGPOS
A75
7-W
H-1
8
A75
6-P
U-1
8
A75
5-P
K-1
8
L4L9
72-B
U-1
8
L968
-OR
-18
L969
-WH
-18
K90
7-B
U-1
8F
772-
WH
-18
ONE TOUCHLOW IDLE SW
F77
1-O
R-1
8
200-
BK
-18
H
ATCH AUX HYDCONT SW111-4787
L20
L16 L16
9 811 3
K909-BU-18
MOTOR
A
L55
308-YL-18
S
J J 15A
ENG GOV10A10A10A15A10A10A
INSP LAMP
12 6
508-
PU
-18
45 3
111-
RD
-14
Y/G
Y/W
200-BK-14
UPPER WIPER MOTOR 131-0399
L20
F
405-GY-18
BK
-00
200-BK-18
304-WH-8
308-YL-18
M
A718-PU-18
309-GY-18616-BU
322-GY-18607-PK-18
DISCONNECT SW. 7N-0718 7N-0719(NOTE C)
ALT BREAKER 9S-0174
OUT 1+B
IN 2
IN 1GND
OUT 2
UU
ZZ
YYLL
UU
VV
XX WW
546312
BACKUPRESISTOR102-8016
121
HYD LOCK SOL RELAY111-4871
5
3
4
6
2
1
789
10
1112
FORINSP LAMP9R-7941
8
2
1011
34
9TIMER RELAY111-4870
7
MAIN RELAY 3T-0376
CAB/CHASSIS LAMP RELAY111-4871
6
578-BU-18
XX
5
4 5
60A
ATTACHMENT-ENG OILPRESS SW
3E-6455 (NOTE H)
NEUTRALSTART RELAY111-4871
BK-18
BA
C
START RELAY125-1302
6
3
12
21
7
11
89
HORN RELAY111-4871
BOOM LAMP RELAY111-4871
10
DIODE121-1022
DIODE121-1022
12V SOCKET9R-7941
615-
YL
LL KK
RD-18
1 2
KE
Y S
W.(
ON
)
13
24
HEATERCONT UNIT104-3204
HEATERRELAY116-0114
RESISTOR 7Y-8242
KK
ZZ
CH
EC
K T
ER
M.
RE
LAY
KE
Y S
W.(
STA
RT
)
GN
D
IND
ICAT
OR
RE
GU
LATO
RT
EM
P.
200-
BK
200-
BK
200-
BK
200-
BK
-18
615-
YL-
1861
5-Y
L
QQ 134-6475 I-6
NN 153-7794 I-6PP 160-0973 I-6
103-
RD
-18
FDOME LAMP096-0721
12
103-
RD
-18
C538-OR-18
C537-GN-18
C537-GN-18C538-OR-18
524-BU120-YL
120-YL
524-BU
191-WH-14
615-YL
135-BU
200-BK-18
139-OR-18
638-WH
955-BU-18
35 47 18 6
L975
-PK
-18
L975-PK-18
L975-PK-18L975-PK-18
L975-PK-18
L973-GN-18
L977-YL-18L978-GY-18L974-GN-18
L971-GN-18
L977-YL-18
L978-GY-18
L969
-WH
-18
L968
-OR
-18
L973
-GN
-18
L972
-BU
-18
L973-GN-1820
0-B
K
L971-GN-18
L977-YL-18L974-GN-18L978-GY-18
ENG/PUMP CONT 126-2981
L971-GN-18L970-GY-18
L977-YL-18L974-GN-18
L969-WH-18
200-
BK
200-BK
200-BK
152-BU
638-WH8630-BU-18
200-BK
506-PU
RELAY
ATCHBEACON
8630-BU-18638-WH
L972-BU-18
L970
-GY-
18
L971
-GN
-18
L978
-GY-
18
L975
-PK
-18
763-
BU
-18
L977
-YL-
18L9
74-G
N-1
8L9
78-G
Y-18
L969
-WH
-18
L968
-OR
-18
L972
-BU
-18
109-RD-6
L977
-YL-
18
495-GN-18
109-RD-6
306-GN-18
200-
BK
-18
306-GN-18
306-GN-18
200-
BK
-18
C
AB
200-
BK
-18
152-BU
K906-GN-18
177-RD-14177-RD-14
177-
RD
-14
177-
RD
-14
177-
RD
-14
177-
RD
-14
325-
PK
-18
177-RD-14
L53L53
L52L52
310-PU-18
325-PK-18
310-PU-18
310-PU-18
877-YL-4101-RD-4
177-
RD
-617
7-R
D-1
4
200-BK-18
955-BU-18
N924-WH-18
326-RD
A768-BU-18
BKYL
172-RD-18
BA
B
BA
A
C
115-PK-14
GG (NOTE C)
RD-00
RD-00
C AB
BBBB
21
177-RD-14
B
177-RD-14
177-RD-14177-RD-14
506-PU
177-RD-14177-RD-14
177-RD-14177-RD-14
112-
PU
-6
BOOM RAISEPRESS SW106-0180
12
B
212
1
ENG/PUMP CONTSOL111-9916
LEVEL FINISHSOL121-1490
AC
21
TRENCHING SOL121-1490
TRAVEL SPEEDSOL121-1491
N
21
B
122
1
FUEL LEVELSENSOR105-9911
306-GN-18
ATCHREFUELING SW 5C-6108
21
B
21
SWINGBRAKE SOL121-1491
IMPLEMENT PRESS SW106-0179
TRAVELPRESS SW106-0179
B
120-YL115-PK-14
147-PU-18
114-RD-18
107-RD105-RD
140-BU
177-
RD
-14
129-BU-18
154-
RD
-18
815
1-G
N-1
8
180-GN
320-
OR
-18
200-
BK
-18
A75
6-P
U-1
8
A757-WH-18
AUX BACKUP SW
CBAL5
719
1-W
H-1
4
N92
4-W
H-1
8
JJ
NN
A
JJ
A
149-PU
185-YL-18
A587-YL-18
JJ
A75
7-W
H-1
8
6 210
N923-GY-14191-WH-14
124-GN-14
112-
PU
-14
112-
PU
-14
118-GY
147-
PU
-18
A588-GN-18
VV
200-
BK
-18
AD
AD
177-
RD
-6
109-
RD
-6
101-
RD
-6
101-
RD
-610
1-R
D-6
150-RD-18
MAIN BREAKER 9S-0174
151-GN-18
210-BK
112-PU-14
3
111-RD-14308-YL-18
200-BK
307-OR-18
200-BK
A587-YL-18
200-BK-14
200-BK-14
K912-GN-18K911-PK-18
403-GN-18
147-
PU
-18
524-BU
615-YL-18
K911-PK-18K912-GN-18
1
N92
3-G
Y-14
168-
RD
-14
A586-OR-18
152-
BU
152-
BU
-18
152-
BU
-14
196-BU
172-RD-18
A425-YL-18
590-GY-18501-GN-18
A75
5-P
K-1
8
A75
6-P
U-1
8
A75
7-W
H-1
8
A75
8-B
R-1
8L9
72-B
U-1
8
200-BK-14103-RD-18
K91
5-G
N-1
8
168-
RD
-14
118-GY129-BU-18615-YL-18
403-GN-18
633-BU-18638-WH
139-OR-18135-BU
135-BU
2
L40
210-BK200-BK-14
L26
1
103-RD-18512-GN-18511-BR-18509-WH-18508-PU-18
615-YL
615-YL
235-BK-14
200-BK-14
200-BK-14
200-BK
506-PU
590-GY-18501-GN-18
A586-OR-18
A75
5-P
K-1
8
103-RD-18103-RD-18
152-
BU
152-BU-18152-BU
152-BU-18
508-PU-18509-WH-18
N92
3-G
Y-18
C
511-BR-18
152-BU
512-GN-18129-BU-18
L909-BU-18
103-RD
118-GY
235-BK-14
2
L908-OR-18
524-BU
N92
3-G
Y-18
N92
3-G
Y-14
177-
RD
-14
177-
RD
-14
177-
RD
-14
4
NN
177-
RD
-14
200-
BK
-18
A75
6-P
U-1
8
A75
7-W
H-1
8
308-
YL-
18F
771-
OR
-18
F77
2-W
H-1
8L9
69-W
H-1
8L9
68-O
R-1
8K
915-
GN
-18
K90
7-B
U-1
8
235-BK-18
235-BK-18L909-BU-18L908-OR-18
196-BU
A
J
4 9
A75
8-B
R-1
8
308-
YL-
18
191-
WH
-14
8 7 2 5 3 1611
A84
8-P
K-1
8A
847-
YL-
18
118-GY
12
A A
7 8165432
PLATFORM
GROUND STRAP 7G-1060
L40
H H
306-GN-18
152-BU-18
200-BK-18
200-BK
200-BK-14
J
A
A424-WH-18
4 5 32 16
K99
7-B
U-1
8
112-
PU
-14
PLATFORM
A
112-
PU
-14
68 17 4 5 3 2
200-BK-14
200-BK-18
118-GY
A
L56
954-GN-18
954-GN-18
118-GY
200-BK-14
200-BK-18
107-RD
403-GN-18
L40
103-RD
L908-OR-18
152-
BU
L17
118-
GY
112-PU-6
152-
BU
103-RD
200-
BK
-14
L19
C
235-
BK
-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
A755-PK-18
763-BU-18
A757-WH-18
L909
-BU
-18
R
L908
-OR
-18
2
A771-PU-18
306-GN-18
K997-BU-18
788-YL-18A762-PU-18
412-BU-18
430-BU-18
321-BR-18405-GY-18492-GY-18491-PK-18495-GN-18
A758-BR-18
496-WH-18
638-
WH
308-YL-18
L975-PK-18
638-
WH
118-
GY
524-
BU
210-
BK
2
1
4
200-
BK
-14
615-
YL
3
NOTE C : USE WITH COLD WEATHER.
200-BK
ZZ 111-4831 F-11
200-
BK
-14
K99
7-B
U-1
8
103-
RD
-18
5867
135-
BU
135-
BU
210-
BK
210-
BK
200-
BK
135-
BU
21
K99
7-B
U-1
8590-
GY-
1850
1-G
N-1
8
129-
BU
-18
403-
GN
-18
A587-YL-18L3
954-
GN
-18
952-OR-18
952-OR-18
952-OR-18
952-OR-18
779-
WH
-18
780-
PU
-18
200-
BK
-18
235-BK-18
779-
WH
-18
K99
7-B
U-1
8
779-WH-18
780-PU-18779-WH-18
780-PU-18779-WH-18
779-WH-18
780-PU-18779-WH-18779-WH-18
235-BK-18
23
K99
7-B
U-1
8
954-
GN
-1863
3-B
U-1
8
235-BK-18
K91
1-P
K-1
8K
912-
GN
-18
C468-BU-18
K907-BU-18F772-WH-18F771-OR-18
K915-GN-18
K911-PK-18K912-GN-18
60A
103-
RD
-18
615-
YL-
18
A58
6-O
R-1
8
506-
PU
M
139-
OR
-18
L909-BU-18L908-OR-18
487-OR-18
120-
YL
K904-GN-18
MM
K90
5-R
D-1
8
235-BK-18
615-YL
C53
7-G
N-1
8
615-YL
512-
GN
-18
511-
BR
-18
509-
WH
-18
508-
PU
-18
C53
8-O
R-1
8
103-
RD
-18
L909-BU-18
THROTTLE DIAL S1THROTTLE DIAL S2THROTTLE DIAL S3THROTTLE DIAL S4
GOV ACTR (A)
EPR VALVE (+)
GOV ACTR (B)
GOV ACTR FDBK
COOLANT LEVEL SWTRAVEL SPEED SOLENG SPEED SENSOR (-)ENG SPEED SENSOR (+)
TRENCHING SOLIMPLEMENT PRESS SW
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
FRONT PUMP PRESS SENSORHYD OIL LEVEL SWAIR CLEANER SENSOR
HYD OIL TEMP SENSOR
RS485 - (VALVE CONT)RS485 + (VALVE CONT)
RS232C (GND)RS232C (RX)
COOLANT SENSOR
9
2010
28
31261330293540 2
6
39
33
24252215
ALTERNATOR (R TERM)
RS485 - (RH JOYSTICK)
738
12
TRAVEL ALARMENG OIL PRESS SW
36
SWING BRAKE SOLEPR VALVE (-)
17
21 8
RS485 + (LH JOYSTICK)
35
CAB
36
RS485 - (LH JOYSTICK)RS485 + (PEDAL)
67
RS485 + (SEMI AUTO)
RS485 - (PEDAL)RS485 + (RADIO CONT)
8
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18 TRAVEL PRESS SW
HYD OIL FILTER INDICATOR
1
9
RS485 - (RADIO CONT)RS485 + (ELEC GOV)
10
+B+B
AIH INDICATOR
FINE SWING SW
2
BOOM RAISE PRESS SWLEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS SW
2930
18
KEY SW ON
RS485 - (ELEC GOV)19
12
40
2
4
2520
LOW IDLE SW
21
17
11122
343242314131615
5
3231
26
2827
39
38
37
GNDGND
HAMMER PRESS. SW
RS232C (TX)
KEY SW START
A
LUNCH BOX LIGHT
2 3 4 5 61 87
37
4 3
OPTION SENSOR (PWM)
1
1619
5
OPTION SENSOR (PWM)
615-YL
323314
11
34
1
6 107 121524
615-YL
CONVERTER131-0327
76543 81 2 5 4 3 2 16
F
F
F
F E E
A A A 118-GY
L6
F
ANTENNA106-0036
GND24V BAT IN MEM24V SW. IN
12V MEM OUTGND12V SW. OUT
177-
RD
-14
A424-WH-18
2 34 56 1 87
JOYSTICK +B OUT
BK
-00
RD-00
RD-00
A
CHASSIS
DD
DD
GG(NOTE C)
CC
BK
-00
FF (NOTE C)
BB
EE (NOTE C)
AA
L15
L15
BB
115-PK-14
189-RD
154-RD-18
111-RD-14
150-RD-18
K997-BU-18
189-RD
154-RD-18
111-RD-14
150-RD-18BBB
N
B
A
A
L45
L15
L50
L45
RELAY PANEL
115-PK-14114-RD-18114-RD-18114-RD-18
L15
D
D
DA
A
A
L48
L47
114-
RD
-18
150-
RD
-18
189-RD
154-RD-18
A49
5-G
Y-18
115-
PK
-14
115-PK-14
115-PK-14
A495-GY-18
A495-GY-18
150-RD-18
114-RD-18
154-RD-18
189-RD111-RD-14
K909-BU-18
K99
7-B
U-1
8
150-RD-18
306-
GN
-18
K90
9-B
U-1
8
786-GN-18
177-RD-14
196-
BU
320-
OR
-18
114-
RD
-18
322-
GY-
18
L47
308-
YL-
1830
8-Y
L-18
A49
5-G
Y-18
111-
RD
-14
189-
RD
154-
RD
-18
154-RD-18
189-RD
177-RD-14111-RD-14
A495-GY-18
RELAY PANEL
L50
L48
A
B
B
B
B
DB
L51
321-
BR
-18
L49
L51
L49
L50
L51
A587-YL-18
L44
L42
L41
L29
L30
L44
L42
L41
L29
L30
L30L29L41L42L44
L30L29L41L42L44
L42
L41
L29
L30
43
5
200-
BK
SENSOR O.W.D. 132-7315
168-
RD
-18
4
5
BUZZER AS113-4683
168-
RD
-18
200-BK-14
200-BK-18200-BK-18
491-PK-18
200-
BK
-18
496-
WH
-18
L21
487-
OR
-18
491-
PK
-18
168-
RD
-18
7
140-BU
200-
BK
200-
BK
-18
200-
BK
-18
L976
-GN
-18
321-
BR
-18
200-
BK
140-
BU
430-
BU
-18
412-
BU
-18
310-
PU
-18
311-
WH
-18
200-
BK
-18
200-
BK
-18
AE 121-1044 A-6
430-
BU
-18
200-
BK
-18
513-
OR
-18
519-
PK
-18
200-
BK
-18
412-
BU
-18
1 2
B
ORPK
140-
BU
200-
BK
326-RD
L971-GN-18
200-
BK
-18
A771-PU-18L974-GN-18K906-GN-18
KK 111-4833 F-11
200-
BK
-18
1
T
2 HYD OILLEVEL SW111-4760
HYD OILTEMP SENDER 4I-5394
B
B
B
AB
200-BK-18200-BK-18200-BK-18200-BK-18
C
+B
L971-GN-18
A771-PU-18
SIGNAL
L974-GN-18200-BK-18
200-BK-18
200-BK-18
GROUND
HYD OILFILTER SW116-3660
B
200-BK-18496-WH-18
COMPONENTS ARE SHOWN INSTALLED ON A FULLYOPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
LL 111-4832 F-11
HH 132-1806 A-12GG 116-0242 I-11 FF 116-0080 H-11 EE 121-0996 A-11 DD 111-4881 I-11CC 143-1646 I-11BB 116-0080 I-11AA 121-0997 A-11
CABLE AS.
VV 128-8937 G-10
WIRE AS.
R 128-8876 A-3
200-BK-18487-OR-18
N 116-0247 E-11M 117-7028 C-6L 7Y-3994 A-1K 148-5179 B-1J 175-1317 H-3H 175-3000 D-3G 4I-5396 B-1F 154-8149 C-6E 130-6568 C-5D 155-1788 G-11C 130-6572 A-12B 144-8419 B-3
GYPUBR
REDWHITEORANGEYELLOWPINK
ABBREV COLOR
BLACKGRAYPURPLEBROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTIONTO VEHICLE STRUCTURE
INTERNAL ELECTRICALCONNECTION TO SURFACEOF COMPONENT
BLADE, SPADE, RING,OR SCREW TERMINAL
BKPKYLORWHRD
GNBU
GREENBLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,COMPONENT
L# CIRCUIT GROUPINGDESIGNATION
IDENT PART NO. LOC
176-
YL
12
SIGNAL IN
HARNESS AS.
SIGNAL OUT
310-
PU
-18
L971-GN-18A771-PU-18L974-GN-18K906-GN-18
495-GN-18616-BU
322-GY-18
200-
BK
-18
607-PK-18168-RD-14
487-OR-18
A425-YL-18
491-PK-18
308-YL-18
L977-YL-18763-BU-18
L978-GY-18A768-BU-18A769-GY-18K904-GN-18K997-BU-18
200-BK200-BK
A
779-
WH
-18
2
2 1NOTE E : NOT NECESSARY FOR ELECTRIC OPENABLE WINDSHIELD.
12
JJ JJ
ATCH-FOOTSWITCHPEDAL-RH
ATCH-FOOTSWITCHPEDAL-LH
NN
HAMMER 2SOL (ON/OFF)
116-3413
2
172-RD-18A761-PU-18F773-OR-18F774-WH-18
326-RD405-GY-18788-YL-18
A762-PU-18C468-BU-18
101-RD-4304-WH-8
403-GN-18109-RD-6
309-GY-18492-GY-18
A718-PU-18877-YL-4
311-WH-18200-BK
200-BK
124-
GN
-18
311-WH-18321-WH-18
519-PK-18
412-BU-18430-BU-18
A53
7-P
K-1
821
200-
BK
-18
310-PU-18
586-
BR
-18
1
105-
RD
576-
PK
-18
575-
YL-
18F
773-
OR
-18
F77
4-W
H-1
8A
770-
PK
-18
A76
9-G
Y-18
A76
8-B
U-1
8K
906-
GN
-18
615-
YL-
18
L973
-GN
-18
578-
BU
-18
307-
OR
-18
308-
YL-
18
791-
PK
-18
786-
GN
-18
308-
YL-
18
113-
OR
-18
A58
6-O
R-1
850
1-G
N-1
859
0-G
Y-18
L56
A718-PU-18309-GY-18
616-BU322-GY-18607-PK-18
200-
BK
-18
304-WH-8877-YL-4101-RD-4109-RD-6
JJ 153-1149 H-5
MM 111-4846 I-4
152-
BU
L973-GN-18147-PU-18
K90
9-B
U-1
8
200-BK-18
6V-5821(NOTE C) 495-GN-18
616-BU322-GY-18607-PK-18
168-RD-14
L18
495-GN-18200-BK-18
616-BU322-GY-18607-PK-18168-RD-14
JJ
176-
YL
NN 120
0-B
K
53 61 4 2
L970
-GY-
18
ATCHSEAT WITHSEAT HEATER111-6458
110 8 11 12 9 10 11 432
1
98
2
7654321 4 5 61
12 33
HH
AA
H
2
A
H
4
A
NOTE B ; USE WITH SHORT BOOM.
A75
7-W
H-1
8
200-
BK
-18
172-RD-18
877-YL-4
3
L44
L43
L44
B CHASSIS
L42
200-
BK
-18
L41
L29
L30
326-RD
A53
7-P
K-1
812
4-G
N-1
8
172-RD-18
876
C
EEAA
L969-WH-18
L43
L43
K99
7-B
U-1
8
200-BK-18
CHASSIS
L30
L10
200-
BK
-18
A770-PK-18
L968-OR-18
200-
BK
-18
200-
BK
-18
5
200-
BK
-18
185-
YL-
18
4
S 136-4731 H-2
L29
L10
L10
200-
BK
L8
200-
BK
L30
L29
L41L4
2
L42
L41
321
JJ
NN
A75
8-B
R-1
8A
757-
WH
-18
A75
6-P
U-1
8A
755-
PK
-18
200-
BK
-18
200-
BK
-18
N92
3-G
Y-14
L15
952-
OR
-18
F84
6-P
U-1
8
G84
8-G
N-1
8
955-
BU
-18
954-
GN
-18
615-
YL-
1861
5-Y
L-18
200-BK-18
K97
3-B
R-1
8K
974-
PU
-18
K97
5-W
H-1
8K
976-
OR
-18
L56
L56
200-
BK
-18
200-
BK
-18
200-
BK
-18
L15
549-
PK
-18
200-
BK
-18
548-
GY-
1854
7-O
R-1
854
6-B
U-1
8
CHASSIS
YY 111-4830 F-11
615-
YL-
18
200-
BK
-18
ANTENNA CABLE111-4846
N92
4-W
H-1
8
L970
-GY-
18
575-
YL-
18
200-
BK
-18
576-
PK
-18
A53
7-P
K-1
8
578-
BU
-18
200-
BK
-14
L973
-GN
-18
152-
BU
-18
6
200-
BK
-18
8
200-
BK
-18
5 4
200-
BK
-18
37
K907-BU-18
21
200-
BK
-18
200-
BK
-18
615-
YL-
1861
5-Y
L-18
586-
BR
-18
200-
BK
-18
200-
BK
-18
L34
615-
YL-
18
200-
BK
-18
K909-BU-18
200-
BK
-18
H
200-
BK
-18
200-
BK
-18
549-
PK
-18
198-
PK
-18
XX 111-4829 F-11
548-
GY-
1819
8-P
K-1
8
200-
BK
-18
200-
BK
-18
185-YL-18
K909-BU-18
L25
524-
BU
L16
L19
L3
L25
L33
326-
RD
326-
RD
L21
L32
L31
L18
L9 L8 L12
L13
L13L12L11
L8L9
L10
L32L31
HH
L33
L33
L33
L33
K91
5-G
N-1
8
L20
308-
YL-
18
L19L3
L25L4
L4L25
L3L19
L16
L32
L31
L4L25
L3L19L20
L20
L19
L20
L25
L3 L4
103-RD
L19
L20
L25
L2
K997-BU-18
K997-BU-18
K99
7-B
U-1
8
615-
YL-
18
615-
YL-
18
L27
ATCH ROTATING BEACON LAMP
L27
L26
F771-OR-18F773-OR-18F774-WH-18F772-WH-18
615-
YL-
18
A769-GY-18
T 116-0096 A-4
152-
BU
-18
615-
YL-
18
A768-BU-18
F
A
2L25
L30
K906-GN-18
615-
YL-
18
185-YL-18
L29
200-
BK
-18
WW 128-8938 F-11
310-
PU
-18
200-
BK
-18
549-
PK
-18
200-
BK
-18
615-
YL-
18
615-
YL-
18
1
168-RD-14
200-
BK
-18
168-RD-14
H
ATCH STARTAID SW111-4784
168-RD-18
185-YL-18
L4
200-BK-18
L5
2
ATCH AUX SW
H
L11
ATCHSWING CONT SW111-4788
115-PK-14
HHH
ATCH O.W.D.132-1828
H
BACKUP EPR VALVE SW114-0421
H HBACKUPGOV SW110-7884
ATCH SEATHEATER SW111-4783
H
506-PU506-PU
A
L22
J
5 111 973
A
J
176-
YL
BA
308-
YL-
18
A 152-7674 C-2
120-
YL
124-
GN
-14
118-
GY
129-
BU
-18
191-
WH
-14
149-
PU
168-
RD
-14
105-
RD
114-
RD
-18
107-
RD
140-
BU
196-
BU
112-
PU
-14
112-
PU
-14
112-
PU
-14
308-
YL-
18
112-
PU
-14
112-
PU
-14
185-
YL-
18
112-
PU
-14
151-
GN
-18
112-
PU
-14
112-
PU
-14
200-
BK
-18
189-
RD
-14
111-
RD
-14
200-
BK
-18
151-
GN
-18
547-
OR
-18
198-
PK
-18
546-
BU
-18
150-
RD
-18
154-
RD
-18
LEFT SW
CBA
198-
PK
-18
168-RD-18
AC
616-BU200-BK
200-BK-18322-GY-18
546-
BU
-18
RIGHT SW
L16
MULTISWITCH JOSTICK 122-4829
198-
PK
-18
547-
OR
-18
198-
PK
-18
J
200-BK
NEUTRAL STARTLIMIT SW111-4799
HORN SW128-2134
200-BK-18
B
320-
OR
-18
200-BK-18200-BK-18200-BK-18200-BK-18
200-BK-14
L976-GN-18
616-BU
365-YL-18
AC AC 132-1827 A-4
200-BK-18
322-GY-18322-GY-18
322-GY-18200-BK-18
607-PK-18322-GY-18
200-BK-18168-RD-14200-BK
200-BK-18
325-
PK
-18 20
0-B
K-1
432
3-W
H-1
4
325-PK-18
365-
YL-
18
L976
-GN
-18
112-
PU
-14
112-
PU
-14
112-
PU
-14
112-
PU
-14
L4
112-
PU
-14
107-
RD
196-
BU
320-
OR
-18
151-
GN
-18
114-
RD
-18
365-
YL-
1836
5-Y
L-18
L976
-GN
-18
L976
-GN
-18
200-
BK
200-
BK
-18
ATCH AUX SW
8630
-BU
-18
615-YL
A758-BR-18
118-GY
115-PK-14
111-RD-14
168-
RD
-14
149-
PU
140-
BU
U 116-0098 A-4
365-
YL-
18
307-OR-18
A756-PU-18
615-YL-18
A75
6-P
U-1
8
200-
BK
-18
191-
WH
-14
147-
PU
-18
8630
-BU
-18
L976
-GN
-18
L976
-GN
-18
575-YL-18152-BU-18576-PK-18
A755-PK-18
147-PU-18
A58
7-Y
L-18
L973-GN-18
124-
GN
-14
118-
GY
129-
BU
-18
105-
RD
185-
YL-
1811
3-O
R-1
8
633-
BU
-18
N92
3-G
Y-14
172-
RD
-18
124-
GN
-14
200-BK-18
105-RD
A586-OR-18
168-
RD
-18
615-
YL-
1861
5-Y
L-18
200-
BK
-18
200-
BK
-18
112-
PU
-14
124-
GN
-18
124-
GN
-18
113-
OR
-18
501-GN-18
103-
RD
519-
PK
-18
509-
WH
-18
508-
PU
-18
A425-YL-18
322-GY-18
150-RD-18
K912-GN-18
511-
BR
-18
616-BU
201-BK-18
CONT O.W.D.132-5096
586-
BR
-18
512-
GN
-18
A42
4-W
H-1
8A
425-
YL-
18
200-
BK
CO
NS
OL
SW
SE
NS
OR
2
GN
DS
EN
SO
R 1
65
+ 2
4V
4321
L16
L54
L55
L20L19L3
103-RD-18
L16
L40
L38
L21
L20L19L3
L18
L3L19
L16
L20
L45
308-YL-18
54321
A
BU-18
A424-WH-18
200-BK-18
8630
-BU
-18
FINE SWING SOL 107-7056
519-PK-18
519-PK-18
154-RD-18
189-RD172-RD-18
L22
L15
K905-RD-14
L56
111-RD-14
150-RD-18
L38
L17
616-BU200-BK
L40
308-YL-18
L16
200-
BK
-18
200-
BK
-18
L16
200-BK-18
519-PK-18
200-BK-18
200-
BK
-18
BLOCK AS.121-1023
L3
961-
BR
-18
L25
L40
L38
L21
L20L19L3
L18
L18
L3L19L20
L21
L38
129-
BU
-18
308-
YL-
18
200-BK-18
152-
BU
-18
124-
GN
-14
118-
GY
112-PU-14
308-
YL-
18
120-
YL
OPERATOR STATION
200-BK-18
607-PK-18
115-
PK
-14
191-
WH
-14
24
114-
RD
-18
L40
L16
1
107-
RD
3
105-
RD
961-
BR
-18
MOTOR
L20
L19
961-BR-18
200-BK-14
7
8630-BU-18
L25
-
4
K911-PK-18
590-GY-18
L20
615-
YL-
18
6
200-BK-18N923-GY-18
9
L16
200-BK-18
403-GN-18
318
129-BU-18
C538-OR-18C537-GN-18
S
52
200-BK-18
500-BR-18
201-BK-18
118-GY
200-BK-18
524-BU
633-BU-18
638-WH
139-OR-18
WW
WIPER CONT127-9838
323-WH-14
B
500-BR-18
506-PU
177-
RD
-8
+
168-RD-14168-RD-14
177-
RD
-8
200-BK616-BU
L16
LOWER WIPER MOTOR 131-0398
L40
L38
L21
L40
A
152-
BU
-18
308-YL-18
200-BK-18
113-OR-18791-PK-18
AD 128-8936 I-11
786-GN-18
306-
GN
-18
A586-OR-18501-GN-18590-GY-18
147-
PU
-18
149-
PU
140-
BU
L38
177-RD-8
A588-GN-18
306-
GN
-18
6
A
154-RD-18
C537-GN-18
K905-RD-14K905-RD-14
C538-OR-18
210-BK135-BU120-YL
L20
L3L19
A424-WH-18
B325-PK-182
AB
41
200-BK-18
386-PK-18
1
386-
PK
-18
2
B
386-PK-18
2 1
496-WH-18
189-RD172-RD-18
3
L20
L5
L11
L12
H
1
L6
E
CAB
U U
ATCHREFUELINGRELAY 1111-4871
L18
PLATFORM
A
E
E
+
F/C SOL(PROP.)
137-6464
R
L19
U
HYDLOCK SOL121-1491
L15
L38
L15
TO ATCH SPEAKER(L)FOR OUTSIDE JAPAN
+BL. CHASSISL. BOOM
306-GN-18
WASHW. LOWW. INTGND
GNDLIGHTRS485-+BMAINRS485+
GND INWASH SW+24 INMOT WASHERWIPER SWOUTPUTSINTER SWWIND SW
TO ATCH SPEAKER(R)FOR OUTSIDE JAPAN
961-
BR
-18
200-BK-18
506-PU
200-BK
L3L19
954-GN-18
L975-PK-18
AB
K997-BU-18
326-RD
L20
L19
L3
L21
L20L19L3
L18
L3
L18
200-BK-18
AB
B
326-RD
L13
L13L12L11
L9
L9 L8
E
K997-BU-18
L16
K905-RD-18K905-RD-18
L14
L1
A
E
L1
SW INPUT
NOTE G : USE WITH A/C UNIT
B
L2
A
L1
WINDSHIELD SW9G-2795 (NOTE E)
K90
5-R
D-1
8
L20
AB
ATCHBOOM LAMP 5I-8250
K90
5-R
D-1
4
L4
L
CHASSIS
OPERATOR STATION
S4S3S2S1
COM
G (NOTE B)
AB 125-4873 A-2L
ATCHREFUELING PUMP123-3928
ATCHREFUELINGSTART SW(NO) 6T-9442
T
R
R
HORN 7Y-3919
R
G (NOTE B)KK
+ -
1 2
ATCHREFUELINGRELAY 2111-4871
H
R
MONITOR106-0172
SWITCH PANEL111-4800
KEY SW 9G-7641
H
TT
ATCHREFUELINGSTOP SW(NC) 9X-4184
L2
A/C PHOTOSENSOR128-2162(NOTE G)
L3
ATCH AUX CKT
200-
BK
-
L2
UU 111-4826 F-11
A
200-
BK
-18
B200-BK
118-YL
SERVICEMETER6T-7337
CHASSISLAMP 5I-8251
326-RD
THROTTLEPOS SW 106-0107
ATCHBOOM LAMP 5I-8250
524-BU
EE
E
R
CSB
E
524-BU
OFF
C
ONST
L970-GY-18
CIGARLIGHTER9W-0335
12
21
HORN 7Y-3920
E97638
THIS SCHEMATIC IS FOR THE 320B-HYD EXCAVATOR. (116-0212 V 01)
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 Gauge.
LIGHT IN 24V
LIGHT OUT 12V
CONN 8
CONN 3
CONN 4
CONN 7
CONN 6
CONN 5
CONN 46
CONN 2
CONN 1
CONN 9
CONN 11CONN 10
CONN 17
CONN 14
CONN 16 CONN 20
CONN 19
CONN 18
CONN 15
CONN 32CONN 33 CONN 34
CONN 24CONN 23CONN 22CONN 21
CONN 44
CONN 45CONN 40CONN 39CONN 38CONN 37CONN 36CONN 35
CONN 13CONN 25 CONN 26 CONN 27 CONN 28
CONN 12
CONN 29 CONN 41
CONN 42 CONN 43
CONN 31CONN 30
A
B
C
D
E
F
I
H
G
A
B
C
D
E
F
I
H
G
101112 9 8 7 6 5 4 3 2 1
101112 9 8 7 6 5 4 3 2 1
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITOR CIRCUIT. (EMS)
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
OPERATOR INTERLOCK CIRCUIT.
ENGINE SHUTDOWN CONTROL CIRCUIT.
START AID CIRCUIT.
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGEWHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGEWHEN THE KEY SWITCH IS ON.