Komatsu Galeo PC138US-8 Shop Manual page 10

SEN01977-02
Failure code [DY2DKB] Wiper drive (for) short ........................................................................... 16
Failure code [DY2EKB] Wiper drive (rev) short........................................................................... 18
Troubleshooting of electrical system (E-mode)
Before carrying out troubleshooting of electrical system.............................................................
Information in troubleshooting table ............................................................................................
E-1 When starting switch turned ON, machine monitor displays nothing....................................
E-2 When starting switch turned ON (before starting engine), basic check item lights up ..........
E-3 Engine does not start (Engine does not turn) .......................................................................
E-4 Preheater does not operate .................................................................................................. 12
E-5 Automatic warm-up system does not operate (in cold season) ............................................ 14
E-6 All work equipment, swing, and travel mechanism do not move or cannot be locked.......... 16
E-7 Precaution lights up while engine is running......................................................................... 18
E-8 Emergency stop item lights up while engine is running ........................................................ 21
E-9 Engine coolant temperature gauge does not indicate normally............................................ 22
E-10 Hydraulic oil temperature gauge does not indicate normally .............................................. 23
E-11 Fuel level gauge does not indicate normally ....................................................................... 25
E-12 Contents of display by machine monitor are different from applicable machine................. 27
E-13 Machine monitor does not display some items................................................................... 27
E-14 Function switch does not work............................................................................................ 27
E-15 Auto-decelerator does not operate normally....................................................................... 28
E-16 Working mode does not change ......................................................................................... 29
E-17 Travel speed does not change............................................................................................ 30
E-18 Alarm buzzer cannot be stopped ........................................................................................ 31
E-19 Windshield wiper and window washer do not operate........................................................ 32
E-20 Swing holding brake does not operate normally................................................................. 36
E-21 Travel alarm does not sound or does not stop sounding .................................................... 38
E-22 Air conditioner does not operate normally (including air conditioner abnormality record) .. 39
E-23 While starting switch is in OFF position, service meter is not displayed............................. 51
E-24 Machine monitor cannot be set in service mode ................................................................ 51
E-25 Monitoring function does not display lever control signal normally..................................... 52
E-26 KOMTRAX system does not operate normally ................................................................... 68
Troubleshooting of hydraulic and mechanical system (H-mode)
Information contained in troubleshooting table............................................................................
System chart for hydraulic and mechanical systems ..................................................................
H-1 Speed or power of all work equipment, swing, and travel are low........................................
H-2 Engine speed sharply drops or engine stalls ........................................................................
H-3 No work equipment, travel and swing move.........................................................................
H-4 Abnormal noise is heard from around hydraulic pump .........................................................
H-5 Fine control mode does not function ....................................................................................
H-6 Speed or power of boom is low ............................................................................................ 10
H-7 Speed or power of arm is low ............................................................................................... 11
H-8 Speed or power of bucket is low........................................................................................... 12
H-9 Work equipment does not move in its single operation ........................................................ 13
H-10 Hydraulic drift of work equipment is large........................................................................... 14
H-11 Time lag of work equipment is large ................................................................................... 15
H-12 Work equipment loaded more is slower during compound operation................................. 15
H-13 Boom RAISE speed is low in compound operation of swing + boom RAISE ..................... 15
H-14 Travel speed lowers largely during compound operation of work equipment/swing + travel .. 16
H-15 Machine deviates during travel........................................................................................... 17
H-16 Travel speed is low ............................................................................................................. 18
H-17 Machine cannot be steered easily or steering power is low ............................................... 19
H-18 Travel speed does not change or it is kept low or high....................................................... 20
H-19 Track does not move (Only either side).............................................................................. 20
H-20 Machine does not swing ..................................................................................................... 21
H-21 Swing acceleration or swing speed is low .......................................................................... 22
H-22 Excessive overrun when stopping swing............................................................................ 23
H-23 When upper structure stops swinging, it makes large shock.............................................. 24
8
00 Index and foreword
SEN02467-00
3
5
6
8
9
SEN02468-01
3
4
6
7
8
8
9
PC138US, USLC-8