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8.5.3 ENGINE
• : Always contact us or our sales service agency when dealing with these items.
• In causes of problems or causes which are not listed blow, contact us or our sales service agency for
repairs.
Engine oil pressure monitor
lights up during engine
operating
• Oil level in oil pan (sucking air
in)
• Clogging oil filter cartridge
• Defective tightening of oil pipe,
pipe joint, oil leakage from
damaged point
• Defective engine oil pressure
sensor
• Defective monitor
• Add oil to specified level, see
Check Before Starting
• Replace cartridge, see Every
500 Hours Maintenance
Check, repair
Replace sensor
Replace monitor
Steam spurts out from top of
radiator (pressure valve)
• Coolant level low
• Leakage of water
• Loose fan belt
• Dirt is accumulated in the
cooling system
• Clogging radiator fins or
damaged fins
• Defective thermostat
• Loose radiator filler cap (high
altitude operations)
• Defective monitor
• Add coolant to specified level,
see Check Before Starting
Check, repair
• Adjust fan belt tension, see
Every 250 Hours Maintenance
• Change coolant, flush inside of
cooling system, see Irregular
Maintenance
• Clean or repair, see Every 500
Hours Maintenance
Replace thermostat
• Tightening cap or replace
packing
Replace
Engine water temperature
gauge indicator is in red range
Engine does not start when
starter motor is turned
• Lack of fuel
• Air in fuel system
• Defective fuel injection pump
or defective nozzle
• Starter motor cranks engine
sluggishly
• Pre-heating monitor does not
light up
• Defective compression
(Defective valve clearance)
• Add fuel, see Check Before
Starting
• Repair place where air is sucked
in, see Every 500 Hours Mainte-
nance
Replace pump or nozzle
• See ELECTRICAL SYSTEM
• See ELECTRICAL SYSTEM
Adjust valve clearance
Exhaust gas is white or blue
• Too much oil in oil pan
• Improper fuel
• Drain oil, see Check Before
Starting
• Change to specified fuel
Exhaust gas sometime become
black
• Clogging air cleaner element
• Defective nozzle
• Defective compression
(Defective valve clearance)
• Defective turbocharger
• Clean or replace, see Irregular
Maintenance
Replace nozzle
Adjust valve clearance
Clean or replace turbocharger
Combustion noise occasionally
make breathing sound
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