Description of Problem s E n gi n e olip r e ss u re i s t o o l ow . Enginecoolanttemperatureistoohigh. Hydraulicoiltemperatureistoohigh. e istoohigh. A i r if l et r i s c l og g ed . B a tt e yr v o l at g e i s n ot n o rm a .l Governoractuatorfeedbacksensorcircuitisopenorshortedtobatteryvoltage. y voltage. Governoractuatorfeedbacksensorcircuitisshortedtobodyground. Governoractuatorfeedbacksignalisnotstable. Governoractuatorfeedbacksignaldeviates. G o ve r no r a c ut a ot r d o es n o t m ov e . C a il b a r toi n d a at e r r or . M o ni t or R A M i s n ot n o r ma l . Electricpowersupplytothecontrolleristoomuch(43volts). Over-currentinproportionalreducingvalve. Proportionalreducingvalvecircuitisopen. Monitorpowersupply(digitaloutput)overcurrent. n t. Over-currentindigitaloutput(trenchingsolenoid). Over-currentindigitaloutput(finecontrolsolenoid). Over-currentindigitaloutput(travelspeedchangesolenoid). Over-currentindigitaloutput(travelalarm). Sparesolenoid1(digitaloutput)overcurrent. Over-currentindigitaloutput(swingbrakesolenoid). Sparesolenoid2(digitaloutput)overcurrent. E n gi n e s pe e d i s n ot n o r ma l . Enginecoolanttemperaturesensorisshortedtobodyground. Hydraulicoiltemperaturesensorisshortedtobodygrou e sensorisshortedtobodyground. PWMsensorofpumpdeliverypressureisshortedtobodyground. S p ar e P W M se n so r 1 i s s h or t ed t o b o dy g r o un d . S p ar e P W M se n so r 2 i s s h or t ed t o b o dy g r o un d . PWMsensorofpumpdeliverypressureisopenincircuit. F u el s e n so r i s s h or t ed t o b o dy g r o un d Fuelsensorisopenorshortedtobatteryvoltage. y voltage. Electricpowersupplyistolow(below23volts). Electricpowersupplyistohigh(above32volts). Enginespeeddialisnotinoneofthe10specifiedpositions. Datamismatch1betweenalternatorandspeedsensor(alternatorisabnormal). Datamismatch2betweenalternatorandspeedsensor(speedsensorisabnormal). E ng n i e s at l s. Monitorcommunicationis notnormal. Monitortakestoo muchtimeto respondto controller'ssignal. Communicationisabnormal incontroller.
1 2
Typical representationof a Deutschconnector.The plugcontainsall sockets and thereceptaclecontains all pins.
Receptacle
Plug
17.6 ± 0.6
Resistor: Backup
111-9916
24
AA
Resistor,Sender andSolenoidSpecifications Part No.
102-8017
4
Printed in U.S.A.
1
9
40 28 15 30 11 D 24 32 E 5 25 6 10 3 4 27 1 26 41 34 20 23 36 16 8 2 29 C 7 38 B 13 33 18 22 19
Pm u pD pD si ch ra g e - Si gn a l Pump D ischarge. +B
GN
24
Normally closed switch thatwill open with an increase of a specific condition.
Hammer Sol A
G N RD
K 0 96
B-7
14
CONN 13
RU
K 90 4 K905
Ai rS u h ot ff So eln io dE dEn b a el
487
31
GN
955
Bc a ku pA pA al m r La m p Tr Tr v ae l A al m r Key SW "C" Term.
P K
4 1 9
ConnectorLocation
D
954
Horn Rel ay C oil To SW
BR RD
3 6 8
Switch - Travel Press
21
D
Start A i dSW To Start Aid Sol
3 21 326
Switch - Windshield
E98059
29 E
F772
3 07
H = Located inside dash.
29
Main Chassis
308
39 24
Relay - Neutral S tart
E-8
Switch - Refueling Start A ( tch)
C-11
F = Located around pilot manifold.
I-7 A-6
Bc a ku pS W
39
H-4 D-4
G = Located under platform.
I-7
O R
D-10
E =Located around hydraulicoil tank.
F-9
F 77 1
Pump Control Valve #2 (-)
Switch - Neutral Start Limet
D = Located around relay panel.
G-11 A-11
Pump Control Valve #1 (+)
Aux Ckt
196 198
Switch - Overload Warning Device O.W.D.
B = Located inside of right console.
G-11
Throttle SW #4
PU
Switch - Panel
D
C = Located inside of left console.
CONN 11 CONN 12
T hrottle SW #3
PU
A762
D
A = Locate d insideof cab.
CONN 9
T hrottle SW #2
GY
A761
Aux C kt
RD
Machine locations are repeated for components located close together.
CONN 10
Throttle SW #1
BU
A758
Aux C kt
YL
D
A-3
Relay -S -Start Disable
CONN 6
PK
BR
A757
Main Brkr
BN
I-10
Relay - Heater
CONN 7 CONN 8
A756
Aux Ckt
RD
180 185
I-10
Relay - Horn
D
A755
YL
177
WH
Flow Symbol
Normally open switch thatis closed due to an applied condition,and will open again with a specific decrease in thatcondition.
320B Excavator Electrical System
176
191
Level Symbol
Normally open switch thatwill close with an increase of a specific condition (temp-press-etc.).
ControlCircuits WH
780 786
Relay - Boom Lamp Relay - Fuel Heater
D
779
Aux Ckt
Relay - Cab/Chassis Lamp
Pump - Refueling
D
Torque Converter SW
Aux Ckt
189
Switch - m I plement P ress
R otary Beacon
BU
BN
33 E
Attach Lighting Ckt
WH
BU
38
Temperature Symbol
Bucket Flood a Lmp/Boom Flood a Lmp
BU
638
763
151
B-11
E
A ux Ckt
152
Switch - Engine Oil Press
A-5
BU
BoomL amp
D
D-4
616 633
F l ow C on tF/ i ne S wni g S ol e no i d
PU
18
A-5
Aux C kt Lubricator
BU PU
149
I-11
Switch - Hyd Oil Filter
Pressure Symbol
LightingCircuits
145
A-11
Switch - Hyd Oil Level
D
35
A/C
147
Switch - Engine Oil Level Switch - Swing Control
7
D-7
D-2
Switch - Boom Raise Press Switch - Disconnect
D
H-12
Pump - Heater Fuel (Atch)
Switch - Backup
A
C-7 A-11
Motor -Lower Wiper
H-12
T
Safety So Sol Re Relay To To So Sol
B-11
D
D D
GN
Aux Hy d. Cl s o e
Washer/Wiper
YL
Solenoid - Fine Swing
23
F-12
A588
P ow re Wi nd ow Co n t T oS af et y S olR e al y
PK GY
120
Solenoid -Engine S hutdown
B-7
F-12
B R YL
115 118
Solenoid - Flow Control
A-3
H-11
58 6 A 58 7
Cab/Chassis Lamp
Electrical Schematic Symbols And Definitions
15
I-12
G-12 G-12
Wiper.Aux(Low) Washer.Aux
2
Ground - Chassis
CONN 5
PK BU
33
Ground - Cab
CONN 3 CONN 4
576 576
C-6
Ground - Chassis
CONN 2
Main Power Rly O utput
H-9
SEN R3581
CONN 1
A ux Ckt
E-2
SENR9291
Machine Location
575
RD PU
Aux Hyd - Rotate CCW A ux Hyd - Open
Convertor
SENR9292
Schematic Location
Alt Output(+) Term.
111 112
A ux Hyd - Rotate CW
Controller -A -Aux/Hyd (Atch)
Starting and Charging:
ConnectorNumber
B at(+)
Controller - E ngine/Pump
Engine/Pump Control:
SENR9278-03 March2000
Description AccessoryCi rcuits(Continued)
546
D-7
F-9
D-8
Wire Wire Number Color
Description PowerCircuits
101
5
I 1-1
Fuse - Block
ElectricStartingMoto r:104-7040 r:104-7040 Cons si :t 6V- 5 821
Machine Location E
B-11
A-5
Breaker -Fuel Heater
Control - Wiper
Form Number
Schematic Location F-4
Br e aker -Al et r n at o r Breaker - Main
Title
Component Seat W/Sea t Heater (Atch )
Block - Terminal
Breaker -Warming Windshield
RelatedElectrical Service Manuals
Wire Description
Schematic Location H-4
Alarm-Travel(Atch)
A/CUnit
2
Typical representationof a Sure-Sealconnector.The plugandreceptaclecontain bothpins andsockets.
Pinor Socket Number Wire, Cable,or Harness AssemblyIdentification
Component Part Number
Single Wire Connector C
A
A 325-PK-14
Pin
AA 1
9X-1123 325-PK-14
Wire Color
Socket
2
200-BK-14
CircuitNumber Identification
Wire Gauge
ElectricalSchematic Symbols And Definitions FUSE -A componentinanelectrical circuitthat will openthecircuit iftoo muchcurrent flows throughit. REED SWITCH -A switchwhosecontactsare controlledbya magnet. A magnetcloses he t contactsof anormallyopenreed switch; it opensthecontacts ofanormally closedreed switch.
T
SENDER -A componentthatisused witha temperatureor pressuregauge. Thesender measuresthetemperatureor pressure. Itsresistancechangesto giveanindicationto the gaugeofthe temperatureor pressure.
RELAY (Magnetic Switch) - A relayis anelectrical component that is activated by electricity. It hasa coil that makes anelectromagnetwhencurrentflows through it. The electromagnet canopenor closethe switch part oftherelay. CIRCUITBREAKER(C/B) - A componentinanelectrical circuit thatwill openthe circuit if too muchcurrent flowsthroughit. Thisdoesnotdestroy thecircuitbreakerand it canbereset to become part of thecircuitagain. SOLENOID-A SOLENOID -A solenoidis anelectrical component that is activated ated by electricity. Ithas acoil thatmakesan electromagnetwhencurrentflowsthroughit. Theelectromagnet canopen or closeavalve or move apieceof metal thatcando work. MAGNETIC LATCHSOLENOID -A magnetic latchsolenoidis an electrical componentthatis activatedbyelectricityand held latch bya permanent magnet.It has twocoils(latch and unlatch) thatmakeelectromagnet whencurrentflowsthroughthem. Italsohas aninternal switchthatplaces thelatchcoil circuit openatthe timethe coil latches.
