Komatsu PC1250 -8, Shop Manual

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SEN00891-19 00 Index and foreword
10
PC1250-8
E-11 Fuel level monitor red lamp lights up while engine is running ......................................... 25
E-12 Hydraulic oil temperature gauge does not display correctly............................................ 26
E-13 Fuel gauge does not display correctly............................................................................. 27
E-14 Swing lock monitor does not display correctly ................................................................ 28
E-15 When the monitor switch is operated, no display appears.............................................. 30
E-16 Windshield wiper does not work...................................................................................... 32
E-17 “Boom RAISE” is not correctly displayed in monitor function.......................................... 34
E-18 “Boom LOWER” is not correctly displayed in monitor function ....................................... 35
E-19 “Arm DIGGING” is not correctly displayed in monitor function ........................................ 36
E-20 “Arm DUMPING” is not correctly displayed in monitor function ...................................... 37
E-21 “Bucket CURL” is not correctly displayed in monitor function ......................................... 38
E-22 “Bucket DUMPING” is not correctly displayed in monitor function .................................. 39
E-23 “SWING” is not correctly displayed in monitor function................................................... 40
E-24 “TRAVEL” is not correctly displayed in monitor function ................................................. 42
E-25 Air conditioner does not work.......................................................................................... 44
E-26 Travel alarm does not sound........................................................................................... 46
E-27 Any of panel lamp, head lamp, working lamp (including additional lamp) does not
light up............................................................................................................................. 47
E-28 Step light does not light up or go off ................................................................................ 51
E-29 Electric priming pump does not operate or does not stop automatically......................... 54
Troubleshooting of hydraulic and mechanical system (H-mode) SEN01644-00
Before troubleshooting for hydraulic and mechanical systems................................................ 3
H-1 Speed or power of all work equipment, travel, and swing is low....................................... 9
H-2 Engine speed lowers remarkably or engine stalls............................................................. 11
H-3 All work equipment, travel, and swing systems do not work............................................. 12
H-4 Abnormal sound is heard from around pump.................................................................... 14
H-5 Speed or power of boom is low......................................................................................... 15
H-6 Speed or power of arm is low............................................................................................ 17
H-7 Speed or power of bucket is low ....................................................................................... 18
H-8 Boom does not move ........................................................................................................ 19
H-9 Arm does not move........................................................................................................... 20
H-10 Bucket does not move .................................................................................................... 21
H-11 Hydraulic drift of work equipment is large ....................................................................... 22
H-12 Time lag of work equipment is large ............................................................................... 23
H-13 Boom shockless function cannot be turned ON or OFF ................................................. 24
H-14 Machine deviates in one direction................................................................................... 24
H-15 Machine deviates largely at start .................................................................................... 26
H-16 Machine deviates largely during compound operation.................................................... 27
H-17 Travel speed or power is low .......................................................................................... 27
H-18 Machine does not travel (only one track) ........................................................................ 28
H-19 Travel speed does not change........................................................................................ 29
H-20 Machine does not swing ................................................................................................. 30
H-21 Swing speed or acceleration is low................................................................................. 31
H-22 Swing speed or power is low in compound operation of travel and bucket .................... 32
H-23 Swing speed or power is low in compound operation of travel and boom in
swing priority mode......................................................................................................... 32
H-24 Upper structure overruns largely..................................................................................... 33
H-25 Large shocks are made when upper structure stops swinging ....................................... 34
H-26 Large abnormal sounds are made when upper structure stops swinging....................... 35
H-27 Hydraulic drift of swing is large ....................................................................................... 36
H-28 Fan revolution is abnormal (Sound and vibration of the fan is abnormally large,
and the fan is overheated) .............................................................................................. 37
Troubleshooting of engine (S-mode) SEN01645-02
Method of using troubleshooting chart..................................................................................... 3
S-1 Starting performance is poor ............................................................................................. 6
S-2 Engine does not start ........................................................................................................ 8
S-3 Engine does not pick up smoothly .................................................................................... 12
S-4 Engine stops during operations......................................................................................... 13