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Section 10 Diagnosis
● Refer to following chart if you find the machine not working correctly. Stop the engine first before
start inspection.
1. Engine related condition
Condition Check Point Remedy
Starter does not
rotate when the key
switch is turned.
Safety switch may be functioning.
Set the PTO lever to “OFF”, release
your foot from the traveling pedal, and
turn the key switch pressing the brake
pedal.
Level of battery electrolyte or
battery discharge
Replenish the battery electrolyte to the
specified level and charge the battery
fully.
Looseness or corrosion of battery
terminals
Clean and tighten the terminals firmly.
Apply grease to prevent rust.
Blowout of fuse Replace the fuse with new one.
Failure of switch
Subject to repair or replace at a
service plant.
Failure of starter motor
Subject to repair or replace at a
service plant.
Starter rotates but the
engine does not start.
Fuel level in the fuel tank Replenish the fuel.
Air mixed in the fuel
Check the fuel pipe from the fuel tank
to injection pump.
Fuel tap may be at the “C” (close)
position.
Set the fuel tap to the “O” (open)
position.
Key stop solenoid harness may be
dislocated.
Connect the harness firmly.
Engine rotates
irregularly.
Air may be mixed in the fuel.
Check the fuel pipe from the fuel tank
to injection pump.
Water may be mixed in the fuel.
Discharge water and change the fuel
with light oil.
Clogging of injection nozzle Repair or replace.
Clogging of fuel filter Wash or replace.
Overheated engine
Insufficient cooling water Replenish the cooling water.
Loosened or damaged fan belt Adjust the tension or replace the belt.
Clogging of radiator fin Wash or replace.
Insufficient engine oil Replenish the oil.
Overload operation Reduce the load.
Warning
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