WEICHAI WP10 Series User Manual

Operation and Maintenance Manual and User Service Guide for Industrial Power WP10 Series Diesel Engine
36
6. Common failure analysis and troubleshooting
6.1 Unable to start the diesel engine
S/N
Cause
Troubleshooting
1
Operation causes
(1) For the air starter, the air pressure
in the air bottle is insufficient or is not
at the best starting position.
The starting pressure in the air bottle
should frequently stay at 2MPa.
Before starting, crank the engine until
any piston reaches 15degree after the
TDC.
(2) For the electric starter, the battery
electricity is insufficient.
Refer to the service for free-
maintenance battery.
(3) The driving handle is not at the
driving position.
Fix the driving handle to the driving
position.
(4) Diesel engine is loaded
Unload the diesel engine.
(5) Oil viscosity is high, thus, the
flowability is poor.
Refer to the ambient temperature to
select proper oil, or heat oil.
(6) There is air in the fuel system.
Degassing of the system
(7) Water is mixed in the diesel.
Check the fuel tank, and then open
the plug at the bottom of diesel filter
for draining water.
(8) The vent screw of fuel injector is
not tightened, unable to inject fuel.
Clockwise rotate it.
(9) Diesel fuel is not properly
selected.
Refer the local season for selection.
2
Fuel system causes
(1) Fuel pipe joint leaked.
Check and then tighten the joint.
(2) The fuel pipe is clogged.
Check, clean or blow the clogging.
(3) Diesel filter is clogged.
Replace or clean filter element
(4) Fuel injected can’t be well
atomized.
Adjust and repair the fuel injector, if
needed, replace the needle valve
assembly.
(5) Advance angle of fuel supply is
wrong.
Adjust according to specifications.
(6) Fuel injection pump or fuel
injector is damaged.
Repair or replace it.

WEICHAI WP10 Series Specifications

General

Brand	WEICHAI
Model	WP10 Series
Category	Engine
Language	English