180
8.4.3 ENGINE
• Make sure that you contact us or our sales service agency about the actions marked with ( ) in the table.
• Ask us or our sales service agency for repair if you suspect any abnormalities or causes other than
those given below.
Abnormal phenomenon
Major cause(s)
Remedy
Engine oil pressure
abnormality displayed
• Insufficient oil in oil pan (air
suction)
• Oil filter cartridge clogged
• Poor fastening of oil pipe and pipe
joints, oil leaks due to breakage
• Defective engine oil pressure
sensor
• Defective machine monitor
• Refer to the pre-operation
inspection and fill up to the
specified amount
• Refer to the regular 500-hour
maintenance and replace
cartridge
(• Inspection and repair)
(• Replace sensor)
(• Replacement)
Steam spouts out from the
upper part (pressure valve)
of radiator.
• Lack of coolant, water leakage
• Looseness of fan belt
• Accumulation of dirt and water
residues in cooling system
• Radiator fin clogged, or defective
fins
• Defective thermostat
• Looseness of radiator cap
(during work at high elevation)
• Defective machine monitor
• Refer to the pre-operation
inspections and inspect and
replenish/repair cooling water
supply.
• Adjust fan belt tension
referring to the regular
250-hour maintenance
• Refer to “Irregular
Maintenance” to clean inside
the cooling system
• Change coolant referring to
the regular 2000-hour
maintenance
• Clean and repair referring to
the regular 250-hour
maintenance
(• Replacement of thermostat)
• Tighten cap or replace packing
(• Replacement)
Engine coolant
temperature error is
displayed
Engine does not start even
after the starter key is
turned
• Insufficient fuel
• Mixing of air in fuel system
• Mixing of water in fuel system
• Defective fuel injection pump or
nozzle
• Engine slow on starting
• Glow lamp does not light.
• Defective compression
• Poor valve clearance
• The emergency stop switch is
pressed.
• Refer to the pre-operation
inspection and refuel
• Repair air-contaminated area
referring to the regular
500-hour maintenance
• Discard mixed water referring
to irregular maintenance and
pre-operation inspections
(• Replacement of pump or
nozzle)
• Refer to “Electrical
Components”
• Refer to “Electrical
Components”
(• Adjustment of valve
clearance)
• Cancel the emergency stop
switch.
Exhaust gas colour turns
into white or bluish
• Excessive oil in oil pan
• Defective fuel
• Refer to the pre-operation
inspection and fill up to the
specified amount
• Change to specified fuel
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