Operation
3.7 Troubleshooting
WA500-6H – VEAM430100
3-187
Engine
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
Engine oil pressure caution pilot
lamp lights up
z
Low engine oil pan oil level
(sucking in air)
z
Clogged oil filter cartridge
z
Defective tightening of oil pipe
joint, oil leakage from damaged
part
z
Defective monitor
z
Add oil to specified level.
See CHECK BEFORE START-
ING
z
Replace cartridge.
See EVERY 500 HOURS SER-
VICE
z
(Check, repair)
z
(Replace)
Steam is emitted from top part of
radiator (pressure valve)
Water temperature gauge is in red
range
Coolant temperature monitor lights
up
z
Low cooling water level, leakage
of water
z
Dirt or scale accumulated in
cooling system
z
Clogged radiator fin or damaged
fin
z
Defective thermostat
z
Defective thermostat seal
z
Loose radiator filler cap (high
altitude operation)
z
Defective monitor
z
Check, add cooling water, repair.
See WHEN REQUIRED
z
Change cooling water, clean
inside of cooling system.
See WHEN REQUIRED
z
Clean or repair
See WHEN REQUIRED
z
(Replace thermostat)
z
(Replace thermostat seal)
z
Tighten cap or replace packing
z
(Replace)
Water temperature gauge is in
white range below
z
Defective thermostat
z
Defective monitor
z
(Replace thermostat)
z
(Replace)
Engine does not start when starting
motor is turned
z
Lack of fuel
z
Air in fuel system
z
No fuel in fuel filter
z
Defective injection pump or noz-
zle
z
Starting motor cranks engine too
slowly
z
Starting motor does not turn
z
Preheating pilot lamp does not
light up
z
Defective valve clearance
(Defective compression)
z
Add fuel.
See CHECK BEFORE START-
ING
z
Repair place where air is sucked
in
z
Fuel filter with fuel.
See EVERY 500 HOURS SER-
VICE
z
(Replace pump or nozzle)
See ELECTRICAL SYSTEM
z
(Adjust valve clearance)
Exhaust gas is white or blue
z
Too much oil in oil pan
z
Improper fuel
z
Add oil to specified level.
See CHECK BEFORE START-
ING
z
Change to specified fuel
Exhaust gas occasionally turns
black
z
Clogged air cleaner element
z
Defective nozzle
z
Defective compression
z
Defective turbocharger
z
Clean or replace.
See WHEN REQUIRED
z
(Replace nozzle)
z
(See defective compression
above)
z
Clean or replace turbocharger
Abnormal noise generated (com-
bustion or mechanical)
z
Low grade fuel being used
z
Overheating
z
Damage inside muffler
z
Excessive valve clearance
z
Change to specified fuel
z
Refer to “Water temperature
gauge is in red range“ as above
z
(Replace muffler)
(Adjust valve clearance)
Содержание WA500-6H
Страница 2: ......
Страница 3: ...Foreword WA500 6H VEAM430100 1 1 1 Foreword...
Страница 26: ...1 7 CE Conforming equipment Foreword 1 24 WA500 6H VEAM430100...
Страница 254: ...3 7 Troubleshooting Operation 3 188 WA500 6H VEAM430100...
Страница 344: ...4 9 Service procedure Every 12000 hours service Maintenance 4 90 WA500 6H VEAM430100...
Страница 345: ...Technical Data WA500 6H VEAM430100 5 1 5 Technical Data...
Страница 347: ...Technical Data 5 1 Technical data WA500 6H VEAM430100 5 3 GK032301 A B H I G C E F D...
Страница 352: ...5 4 Limit values for slopes Technical Data 5 8 WA500 6H VEAM430100...
Страница 401: ...Index WA500 6H VEAM430100 7 1 7 Index...
Страница 407: ...Notes WA500 6H VEAM430100 8 1 8 Notes...
Страница 408: ...Notes 8 2 WA500 6H VEAM430100...
Страница 409: ...Notes WA500 6H VEAM430100 8 3...
Страница 410: ...Notes 8 4 WA500 6H VEAM430100...
Страница 411: ...Notes WA500 6H VEAM430100 8 5...
Страница 412: ...Notes 8 6 WA500 6H VEAM430100...