3.7 Troubleshooting
Operation
3-184
WA500-6H – VEAM430100
3.7.5
Other trouble
Electrical system
z
( ): Always contact your KOMATSU distributor when deal-
ing with these items.
z
In cases of abnormalities or causes which are not listed
below, please contact your KOMATSU distributor for repairs.
Problem
Main causes
Remedy
Lamp does not glow brightly even
when the engine runs at high speed
Lamp flickers while engine is run-
ning
z
Defective wiring
z
Defective adjustment of alterna-
tor belt tension
z
(Check, repair loose terminals,
disconnections)
z
Adjust alternator belt tension
For details, see EVERY 250
HOURS SERVICE
Even when engine is running, bat-
tery charge circuit caution lamp
does not go out
z
Defective alternator
z
Defective wiring
z
Defective adjustment of belt ten-
sion
z
(Replace)
z
(Check, repair)
z
Adjust alternator belt tension
For details, see EVERY 250
HOURS SERVICE
Abnormal noise is generated from
alternator
z
Defective alternator
z
(Replace)
Starting motor does not turn when
starting switch is turned to START
z
Defective wiring
z
Insufficient battery charge
z
Defective starting motor
z
(Check, repair)
z
Charge
z
(Check, repair)
Pinion of starting motor keeps
going in and out
z
Insufficient battery charge
z
Charge
Starting motor turns engine slug-
gishly
z
Insufficient battery charge
z
Defective starting motor
z
Charge
z
(Replace)
Starting motor disengages before
engine starts
z
Defective wiring
z
Insufficient battery charge
z
(Check, repair)
z
Charge
Engine pre-heating pilot lamp does
not light up
z
Defective wiring
z
Defective heater relay, preheat-
ing water temperature sensor
z
Defective preheating pilot lamp
z
(Check, repair)
z
(Replace)
(Replace)
Even when engine is stopped, bat-
tery charge curcuit caution pilot
lamp does not light up (starting
switch at ON position)
z
Defective wiring
z
Defective monitor
z
(Check, repair)
z
(Replace)
Even when engine is stopped,
engine oil pressure caution pilot
lamp does not light up (starting
switch at ON position)
z
Defective pilot lamp
z
Defective pressure caution lamp
z
Defective monitor
z
(Replace)
z
(Replace)
z
(Replace)
Summary of Contents for WA500-6H
Page 2: ......
Page 3: ...Foreword WA500 6H VEAM430100 1 1 1 Foreword...
Page 26: ...1 7 CE Conforming equipment Foreword 1 24 WA500 6H VEAM430100...
Page 254: ...3 7 Troubleshooting Operation 3 188 WA500 6H VEAM430100...
Page 344: ...4 9 Service procedure Every 12000 hours service Maintenance 4 90 WA500 6H VEAM430100...
Page 345: ...Technical Data WA500 6H VEAM430100 5 1 5 Technical Data...
Page 347: ...Technical Data 5 1 Technical data WA500 6H VEAM430100 5 3 GK032301 A B H I G C E F D...
Page 352: ...5 4 Limit values for slopes Technical Data 5 8 WA500 6H VEAM430100...
Page 401: ...Index WA500 6H VEAM430100 7 1 7 Index...
Page 407: ...Notes WA500 6H VEAM430100 8 1 8 Notes...
Page 408: ...Notes 8 2 WA500 6H VEAM430100...
Page 409: ...Notes WA500 6H VEAM430100 8 3...
Page 410: ...Notes 8 4 WA500 6H VEAM430100...
Page 411: ...Notes WA500 6H VEAM430100 8 5...
Page 412: ...Notes 8 6 WA500 6H VEAM430100...