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Section 10 Diagnosis
Condition Inspection Point Remedy
Engine is running with
low power.
Clogging of air cleaner Inspect and clean the air cleaner.
Seized nozzle
Subject to repair by a service plant.
Insufficient compression pressure
Improperly adjusted valve
clearance
White smoke emitted
from the muffler
Excessive engine oil Discharge excessive oil.
Too low viscosity of engine oil
Change the oil to one of proper
viscosity.
Engine oil lamp lights
up while driving
Decreased engine oil Replenish the oil to specified level.
Too low engine oil viscosity
Change the oil to one of proper
viscosity.
Failed pressure switch Replace the switch.
Failed oil pump Subject to repair by a service dealer.
Charging lamp lights
up while driving.
Failure of alternator Subject to repair by a service dealer.
Looseness or damage of fan belt
Adjust the belt tension or replace the
belt.
2. Brake System
Condition Inspection Point Remedy
Ineffective or pulling
brake
Free-play of brake pedal Adjust the free-play of pedal.
Unsmooth return of
brake pedal or
sticking brake
Failed brake return spring Replace the spring.
3. Hydraulic System
Condition Inspection Point Remedy
Implement will not
raise.
Insufficient HST oil Replenish to specified level.
Air being sucked into the intake
pipe.
Retighten the oil filter or mounting
point. Replace cracked pipe or
damaged O rings, if any.
Clogging of oil filter Replace the oil filter.
Failure of HST pump Subject to repair by a service dealer.
Dust caught in the control valve
or main valve. Failure of O ring.
Subject to repair by a service dealer.
Failure of cylinder Subject to repair by a service dealer.
Implement will not
lower.
Dust caught in the control valve
or main valve.
Subject to repair by a service dealer.
Failure of cylinder Subject to repair by a service dealer.
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