Ba t(t( +) (N (N o t Ap Ap p l ci at oi nS p e cif ci )
Electrical Schematic Symbols And Definitions
ComponentLocation
Wire Number
Description Power Distribution C ircuits
5 7 8
B U
586
BR
590
GY
Wa sher - Au x A ux H yd - Close Au Wiper SW To Intermittent Module D C/DC Co Converter Power Output D C/DC Co Converter Memory Output S e a tH tH eat er
( Res si it e v El Ele m e n t In In Cu shio n )
Schematic Location
Machine Location
Actuator-EngineGov
A-9
1
Sender-HydraulicOilTemp
AirInletHeater
Component
Component
Schematic Location
E
C-8
2
Sensor-A/CPhoto
Alarm - ATCH Travel
G-9
3
Sensor-AirInletHeaterCoolantTemp
Alternator
B-8
4
Sensor-FuelLevel
A-5
23
Antenna ATCH
C-6
5
Sensor-PumpDischargePress
B-8
24
Assembly -Terminal Block
F-8
D
Socket12V
H-6
A579
OR
Wiper Motor +
Batteries - 12VDC
A580
BR
Wiper Motor -
Breaker - Alternator
A581
GN
Wiper Motor Raise
Breaker - Main
A582
PU
Wiper Motor Stop
Cable - ATCH Antenna
G-6, I-3
5
Solenoid - Fine Swing
E-7
28
A583
YL
Power Window Int erlock To Wiper Cont
Control - ATCH Power Window
C-6
15
Solenoid -H -Hydraulic Lock
I-1
G
BU
F ront Window Limit SW To Wiper C ont
Control - Engine/Pump
F-2
7
Solenoid - Level Finish
A-7
F
Wiper SW To Wiper Cont
Controller - Wiper/Washer
E-1
A
Solenoid -S -Swing Brake
E-7
32
H-6
9
PK
Cab / Chassis Ckt
GY
Washer /Wiper Ckt
120
YL
Converter Ckt
A584
124
GN
129
BU
A/ C / Heater Ckt
A586
Cigar Light er Ckt
OR
A587
YL
I-8
6
Solenoid - A/C Clutch
D
Solenoid - ATCH Crush
I-8
D
Solenoid - ATCH Flow Control
C-9
26
D-8
31
D-7
Pow er Window Cont To Safety Sol Relay
Converter - Voltage
Solenoid - Travel Speed
A-7
135
BU
12V 5A Output Ckt
GN
Saf ety Sol Relay To S ol
Converter ATCH
8
Solenoid - Trenching
A-7
BU
L ubricator C kt
A589
OR
Power Window Up
Dial - Engine Speed
E-3
B
Switch - A/C Panel
H-5
147
PU
Fine Swing /F Fi /Flow Co Control Ck Ckt
A590
BU
Pow e Po r Window Do Down
Diode
A-3
18
Switch - Air Cleaner Flow
H-9
35
149
PU
Boom Lamp Ckt
A591
PU
R ear Window Limit SW
Diode - Main Relay
H-7
D
Switch - ATCH Refueling Start
A-4
42
150
RD
Bat (+)
C468
BU
Engine Oil Level
Fuses
I-4,5,6
C
Switch - ATCH Refueling Stop
A-4
44
151
GN
Heater -A -ATCH Seat with Seat Heater
F-4
43
152
BU
Horn
A-2
10
Switch - ATCH Hammer
H-1
G
Lamp - Cab
G-1
12
Switch - ATCH Heater Panel
H-5
C
A-2
13
Switch - ATCH Lower Washer
D-3
B
Hyd Lock /N /N e utral St a rt Ck Ckt
C537
GN
Lower Washer / Wiper Ckt
C538
OR
H azard n I dicator
607
PK
F lo lood Lamp -F -Front
615
YL
154
RD
Neutral Start / Neutral Start Ck Ckt
168
RD
R efueling Pump C kt
172
RD
E ngine Governor
616
BU
17 5
RD
F a nC kt
176
YL
Aux Ckt
763
BU
177
RD
180
GN
Turn Signal SW To Flasher
C ab Flood L amp/ Rops B uc ucket Fl Flood Lamp/Boom Flood Lamp ControlCircuits
Main Brkr
786
Aux Ckt
185
YL
Backup Ckt
189
RD
H yd Lock Ckt
191
WH
196
BU
Insp. Lamp Ckt In
200
BK
Main Chassis Ma
GN
788
YL
791
PK
A718
Power Window C kt
PU
A755
PK
A756
BU
Torque Converter SW Eng Speed Cont - Hi Press SW Eng Speed (+) Eng Speed C ont - Lo Sol
I-3
Lamp - Chassis
Switch -A -ATCH Fine Swing Control
F C
D-4
E-1
A
Switch - ATCH Lower Wiper
D-3
Meter - Service
F-1
A
Switch - ATCH Power Window limit
B-6
A
F-1
A
Switch - ATCH Refueling
A-4
41
B
D
Switch - ATCH Seat Heater
Motor - ATCH Lower Washer
I-9
Motor -ATCH Lower Wiper
H-1
G
Switch - Aux Hydraulic Pressure
H-1
G
Motor - Starter
A-9
14
Switch - Boom Raise Pressure
D-8,D-7
34
M otor - Washer
I-9
D
Switch - Control Pressure
H-1
G
Switch - Coolant Level
H-9
T hrot tle SW #2 Th
Motor - Wiper
Throttle SW #3
Pickup - Engine Speed
B-9
Pump - ATCH Au Auto Lubrication
H-9
E-1
A
D-4
B
36
29
Switch - Crush Pressure #1
H-1
G
16
Switch -Crush Pressure #2
G-1
G
B K
O p er at o r Mo Moni ot r Re Ret urn
A 7 6 1
PU
E el c rt o n ci Pu Pum pC on tT tT h r ot lt eG or u n d
Pump -A -ATCH Refueling
A-2
17
Switch -E -Engine Oil Press
B-9
38
B K
El e c rt oni cP cPu m p Ct Ct lr Gn Gnd
A 7 6 2
PU
E el c rt o n ci Pu Pum pC ont En En gS p e e d Gr Gr o un d
Radio -A -ATCH 12VDC
I-3
C
Switch -F -Flow Control Pressure
H-1
G
304
WH
St a rter Re Relay No. 1O 1Output
A769
GY
Pump Control Valve #2 (-)
Relay - ATCH Refueling Power
A-3
18
Switch - Hydraulic Control
3 06
GN
S ta tr er R el ay C oi lT oN eu t St ar t SW O r
A 77 0
PK
Ee l ct ro ni cP um pC on tr ol B yp as sS WT o Re si st or
Relay -ATCH Refueling Start
A-3
19
Switch -Hydraulic Oil Filter
A-5
E
3 07
OR
K ey S ta tr S WT oN eu tr al S ta tr S WO r
A 77 1
Fo l at S W
Relay -ATCH Refueling Stop
A-3
20
Switch -Hydraulic Oil Level
A-5
E
308
YL
Main Power Relay Coil
877
YL
Glow Plug Magnet ic SW To Glow Plug
Relay - Boom Lamp
I-7
D
Switch - Implement Pressure
D-8
39
R gi h t Co Con o s el Co m p a c ot rS rSW To To Re al y/ Di o d e
Relay - Cab/Chassis Lamp
I-7
D
Switch - Key
F-2
B
A757
GY
BasicMachineCircuits
BR
A768
BU
PU
T hrot tle SW #4
PumpControlValve#1 (+)
309
GY
Al et nr a t or Re Re g ul a t or Te Ter m.
9 5 0
B R
310
P U
S at r tA di S WT oS at r tAi dSo l
9 5 1
P K
320
OR
321
BR
Backup Alarm Lamp Travel Alarm
F771
OR
Backup SW
322
GY
Warning Horn (Forward)
F772
WH
Backup SW
323
WH
Fuel Pump Power
F773
OR
Governor Accel
325
PK
Fuel Pump Relay Cut-Out
F774
WH
Governor Decel
Horn Relay Coil To SW
954
GN
326
P U
K e y S at r tSW " C" T er m .
330
YL
Neutral Start Re Relay Coil
G974
WH
329
YL
Fuel Pump To SW
G975
G9 7 3
YL
365
Y L
F u e P l u m pR pR e l a y To To Sw ti ch
J 7 0 3
P K
MonitoringCircuits 403 405 4 12
K 90 4
GN
K905
R gi ht Co Console En Eng Th Throt le t SW SW To Re Relay/Diode
B oom R ais ePr ess S Wt oC ur sh P er s sS W
I-7
D
Pump Discharge - +B
VMIS Hyd Oil Temp Sensor
K912
GN
XMSN Co Cont Speed 3S 3SW To Gnd
GY
VM S I Co Co o l a n tT tT e m pS ens o r Si Sig n al
K 9 1 5
G N
X MSN Co Co n t Sp Spe e d 4 SW To To Gn Gnd
GN
VMIS Fuel Level Signal
K997
BU
XMSN Cont Neut SW To Gnd
O p r Mo Mon Pa n el Hy Hy dO dO l i Le e v l
L9 0 8
O R
X MSN C ont Pk B kr Le e v rS WT oG nd
GN
Wiper -F -Front L( ow)
L968
OR
I mpl C ont SW To Gnd N.C .
506
PU
W asher - Front
L969
WH
XMSN Cont Speed 1SW To Gnd XM
508
PU
R adio Speaker -L -Left
509
W H
R adio Sp Spe a k e r - Lef t( t(C om m o n )
BR
I mp C l ont Li Li tf Pr Pr o p o r io t n a S l o l
L972
BU
I mpl Cont Low e r Proportional Sol
GN
Radio Speaker -R -Right (Common)
L973
GN
I m pl Cont Sol Return
OR
AC / C om pr es so /r Re rf gi er an t Pr es su er SW SW
Solenoid - A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.
Harness And Wire Symbols
P i n S o ck e t
A
CircuitNumber Identification
105-9344
Receptacle
Wire Gauge Plug
Ground Connection
2
200-BK-14
Pin or Socket Number 1 2
Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
1 2
Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.
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.
ImplContSW To GndN.O.
501
530
B
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.
T
320B Excavators Electrical Systems
S en de rr- Co Co ol an tT tT em pe ar u t er B 8- , B- 9 22 Machinelocationsarerepeatedforcomponentslocatedclosetogether. A Locatedinthecab. B Locatedinthelefthandconsole. C Locatedintherighthandconsole. D Locatedonornearrelaypanel. E Locatedonornearhydraulicoiltank. F Locatedonornearpilotmanifold. G Locatedonornearbottomplatform.
W H
51 9
I-9
Resistor - Backup
XMSN Cont Speed 2 SW To Gnd
GY
F-2
D
XMSN Cont Rev SW To Gnd
L970
Switch Panel
D
SW To SW (Generic)
L9 7 1
D
E-8
496
511
G-7
E-7
X M SN C o n t Fw d S W T o G n d
BU
A
Relay - Main
Relay - Timer
PK
L909
45
Relay - Start Cont
BU
B A
D-8
A tl Pu Pul e s Si Sig To To An i-t St a r tR tR e l a y (w (w as D7 D7 4 6 PK ) P um p Di sc ha rg e - Si gn al
C
D-3 D-1
Unit - A/C, Heater
GN
AccessoryCircuits
Switch - Power Window Limit
Switch- Refrigerants Low Pressure
BU
PK
F-2
Switch - Travel Pressure Switch -Window Limit
D
495
492
I-1
Switch - One Touch Low Idle
D D D
K906
K911
Switch - Neutral Start Limit
I-7 I-7
F-8
K 9 07 K909
D D
C C
Relay - Hydraulic Lock Solenoid
F-7
Alternat or (R) Term.
Hyd Oil Flow SW
D
I-8 F-7
I-1 D-4
Relay - Horn
Relay - Start
O p r Mo n C oo l F ol w D / s 2 Ap p S pe c () Pni 2 6 H ) E UI - AD E MI Opr Mon A ir Filter
E-8
Relay - Fan
Switch - Horn
Relay - Neutral Start
C ur sh Sol to Demolition Relay
Opr Mon Oil Press. (Low Setting)
BU
Relay - Demolition
D
C rush Press SW to Demolition Relay
GY
OR
E-7
Relay - Heater
BU
487
RD
R gi h t Co Con tH tH and el S WT WT oR el a yD / oi d e
GN
430
491
O R
Relay - ATCH Flow Control
Reed Switch - A switch whose contacts are controll ed by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
B
201
A758
This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.
F
235
GroundCircuits
Normally closed switch that will open with an increase of a specific condition. No circle indicates that the wire cannot be disconnected from the component.
Monitor
Start Aid Coolant Sensor Signal
CircuitBreaker Symbol
Flow Symbol
This indicates that the component has a wire connected to it that is connected to ground.
Lighter
T hrot tle SW #1
Level Symbol
Temperature Symbol
Normally open switch that will close with an increase of a specific condition (temp-press-etc.). The circle indicates that the component has screw terminals and a wire can be disconnected from it.
Theconnectorsshowninthischartareforharnessto harness connectors. Connectors that join a harnessto a component aregenerallylocatedat ornearthecomponent. Seethe ComponentLocationChart.
