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Fault mode 3˖Engine is difficult to start or will not start
Possible cause Correction
Improper starting method
Refer to the operating instruction manual of the
vehicle or the equipment for proper starting method
The time for engine start up is 2-3 seconds It is normal and needs no adjustment
The drive system is engaged
Disengage the drive system
Too low starting speed (minimum starting speed
is 100 rpm)
Check battery for voltage and check starting motor
for looseness or eroded connection
Insufficient fuel in the tank Add fuel
Air in the fuel system
Check for air in the system. Tighten or replace the
fuel joints, fuel pipes and relevant parts if necessary
and then prime the system
The connectors of low-pressure fuel pipeline is
loose
Check the low-pressure fuel pipeline and tighten all
the connectors
The fuel filter or fuel suction pipe is blocked Replace the fuel filter or fuel suction pipe
Fuel arises solidification because of cold weather
Choose proper fuel specified in this manual based
on the ambient condition
There is no fuel in the fuel injection pump Check the fuel transfer pump
The resistance of the intake system exceeds the
specified value
Check the intake system and replace the air filter
element if necessary
The resistance of the exhaust system fails to
meet the requirements
Check the exhaust system
The crankshaft rotation is restricted Barring the crankshaft and check for restriction.
Injection pump timing is not correct
Check and adjust injection pump timing. Refer to
5.2 for the procedure
Intake/exhaust valve clearance error (s) Check and adjust valve clearance
Fault mode 4˖Engine starts, but will not keep running
Possible cause Correction
The engine is engaged with the drive system Disengage the engine with the drive system
Fuel arises solidification because of cold weather
Choose proper fuel specified in this manual based
on the ambient condition
Air in the fuel system
Check for air in the system. Tighten or replace the
fuel joints, fuel pipes and relevant parts if necessary
and then prime the system
The fuel filter or fuel suction pipe is blocked Replace the fuel filter or fuel suction pipe
The resistance of intake system exceeds the
specified value
Check the intake system and replace the air filter
element if necessary
The resistance of exhaust system fails to meet
the requirements
Check the exhaust system
Fuel fails to meet required specification or its
quality is poor
Use the fuel specified in this manual and fill a
temporary tank with right high-quality one, with
which to run the engine and verify the fuel issue
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