WEICHAI WD10 - Diesel Engine Stops Soon after Starting; Underpower

Service Manual for WD10 Diesel Engine
23
322 Diesel Engine Stops Soon after Starting
1. Blockage of fuel filter
Disassemble the filter body to clear up the water
and dirt, replace the filter element if necessary.
2. Air in fuel system
Expel the air and check airtightness of joints, check
whether the air bleed screw is tightened.
3. Fuel delivery pump doesn’t work
Check fuel delivery pump piston and valves, clean
and repair.
4. Inferior fuel, high water content
Clean fuel filter and replace the fuel.
5. Low idling speed
Readjust.
323 Underpower
1. Blockage of intake pipe (blocked air filter)
Check air filter and intake pipe, repair or replace
filter element.
2. High exhaust back pressure
Check valve timing, check whether the exhaust pipe
is blocked, adjust and repair.
3. Underpressure of supercharging system
Check and eliminate leakage in pipes and joints.
4. Malfunctioned turbocharger
Replace the turbocharger assembly.
4.1 Blockage of air compressor and turbine
passageway
Clean or replace.
4.2 Float bearing failure
Replace.
4.3 Too much carbon deposit in turbine and
air compressor back gap
Clean.
5. Intercooler is damaged or leaking air
Replace or repair.
6. Fuel pipe is blocked or leaking oil
Check the sealing performance of fuel pipe and pipe
joints, clean up the dirt in filter element or replace
the filter element, repair the pipe.
7. Inferior fuel
Clean fuel tank, fuel filter and fuel pipes, and
replace the fuel.
8. Over wear of injection pump or governor
Repair or replace.
9. Injection pump smoke limiter diaphragm
is damaged
Repair or replace.
10. Air pipe of smoke limiter is damaged and
leaking
Replace.
11. Bad atomization
Check injection pressure, check whether injector is
blocked by carbon deposit, adjust and repair it.