3.7 Troubleshooting
Operation
3-176
WA470-6H – VEAM946100
Engine
!
( ): Always contact your KOMATSU distributor when deal-
ing with these items.
!
In cases of abnormalities or causes which are not listed
below, please contact your KOMATSU distributor for repairs.
Problem
Main causes
Remedy
Engine oil pressure caution pilot
lamp lights up
!
Low engine oil pan oil level
(sucking in air)
!
Clogged oil filter cartridge
!
Defective tightening of oil pipe
joint, oil leakage from damaged
part
!
Defective monitor
!
Add oil to specified level.
See CHECK BEFORE START-
ING
!
Replace cartridge.
See EVERY 500 HOURS SER-
VICE
!
(Check, repair)
!
(Replace)
Steam is emitted from top part of
radiator (pressure valve)
Water temperature gauge is in red
range
Coolant temperature monitor lights
up
!
Low cooling water level, leakage
of water
!
Defective fan pump motor
!
Dirt or scale accumulated in
cooling system
!
Clogged radiator fin or damaged
fin
!
Defective thermostat
!
Defective thermostat seal
!
Loose radiator filler cap (high
altitude operation)
!
Defective monitor
!
Check, add cooling water, repair.
See WHEN REQUIRED
!
(Check, repair)
!
Change cooling water, clean
inside of cooling system.
See WHEN REQUIRED
!
Clean or repair.
See WHEN REQUIRED
!
(Replace thermostat)
!
(Replace thermostat seal)
!
Tighten cap or replace packing
!
(Replace)
Water temperature gauge is in white
range on left
!
Defective thermostat
!
Defective monitor
!
(Replace thermostat)
!
(Replace)
Engine does not start when starting
motor is turned
!
Lack of fuel
!
Air in fuel system
!
No fuel in fuel filter
!
Defective injection pump or
_nozzle
!
Starting motor cranks engine too
slowly
!
Starting motor does not turn
!
Preheating pilot lamp does not
light up
!
Defective valve clearance
(Defective compression)
!
Add fuel.
See CHECK BEFORE START-
ING
!
Repair place where air is sucked
in
!
Fuel filter with fuel.
See EVERY 500 HOURS SER-
VICE
!
(Replace pump or nozzle)
See ELECTRICAL SYSTEM
See ELECTRICAL SYSTEM
!
See ELECTRICAL SYSTEM
!
See ELECTRICAL SYSTEM
!
(Adjust valve clearance)
Exhaust gas is white or blue
!
Too much oil in oil pan
!
Improper fuel
!
Add oil to specified level.
See CHECK BEFORE START-
ING
!
Change to specified fuel
Содержание WA470-6 2006
Страница 2: ......
Страница 3: ...Foreword WA470 6H VEAM946100 1 1 1 Foreword...
Страница 22: ...1 5 Contents Foreword 1 20 WA470 6H VEAM946100 7 Index 7 1 7 1 Index 7 2 8 Notes 8 1...
Страница 28: ...1 7 CE Conforming equipment Foreword 1 26 WA470 6H VEAM946100...
Страница 250: ...3 7 Troubleshooting Operation 3 178 WA470 6H VEAM946100...
Страница 340: ...4 9 Service procedure Every 12000 hours service Maintenance 4 90 WA470 6H VEAM946100...
Страница 341: ...Technical Data WA470 6H VEAM946100 5 1 5 Technical Data...
Страница 343: ...Technical Data 5 1 Technical data WA470 6H VEAM946100 5 3 GK032301 A B H I G C E F D...
Страница 348: ...5 4 Limit values for slopes Technical Data 5 8 WA470 6H VEAM946100...
Страница 381: ...Index WA470 6H VEAM946100 7 1 7 Index...
Страница 387: ...Notes WA470 6H VEAM946100 8 1 8 Notes...
Страница 388: ...Notes 8 2 WA470 6H VEAM946100...
Страница 389: ...Notes WA470 6H VEAM946100 8 3...
Страница 390: ...Notes 8 4 WA470 6H VEAM946100...
Страница 391: ...Notes WA470 6H VEAM946100 8 5...
Страница 392: ...Notes 8 6 WA470 6H VEAM946100...