Chapter III Introduction of Fault Case for
WD615/618 Diesel Engine
Failure diagnosis and remedy principle
3.1 Diesel Engine Starts Hard
● When a diesel engine has faults, we apply a method that the easier
part rst and remove faults one by one.
● Do not replace any part haphazard until nd root of the fault.
● Inspect whether gear shift is at neutral position and neutral position
switch is normal; inspect whether shut-down switch under vehicle is
normal and ameout electromagnetism valve is damaged. Come into next
step if it still can’t be started.
● Inspect whether vehicle starting line and battery are normal. Come
into next step if it still can’t be started.
● Judge whether engine works normally. Inspect whether the rotation
of engine is exible and initial angles of valve gear are correct if the fault
still does not be solved. Come into next step if it still can’t be started.
● Inspect whether there
is air in low pressure fuel
passage. Come into next
step if it still can’t be started.
● Inspect whether the
fault is caused by plateau
and low
temperature
● Contact professional
maintenance personnel from professional maintenance station to check
for you.
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