WEICHAI WD10 Service Manual - page 32
Service Manual for WD10 Diesel Engine
22
ATTENTION:
1.
Diesel engine fault cause determination is an extremely careful job. Before basically be
sure about the cause, it’s not allowed to disassemble the engine casually, otherwise instead
of eliminating the fault, some severe trouble may occur due to improper reassembling.
2.
For key components, such as high pressure oil pump and turbocharger, only dedicated
instruments and equipment are not enough to perform proper maintenance and
inspection, an experienced serviceman is indispensable. So users without proper
experience and tools are not allowed to disassemble and adjust the engine casually.
32 Fault Causes and Elimination Methods
321 Diesel Engine Couldn’t Be Started
Fault cause
Elimination method
1. Blockage of fuel pump oil inlet filter
screen or hoses in the circuit
Check and clean up the dirt, and check the
cleanliness of the fuel.
2. Air in fuel system
Expel the air and check airtightness of joints, repair
if necessary.
3. Fuel injection pump failure
Check the plunger and fuel delivery valve, repair or
replace the damaged parts.
4. Fuel injector failure
Check the atomization condition of the injector.
5. Valve or fuel supply pipe is damaged or
leaking oil
Check and adjust.
6. High pressure fuel pipe is damaged or
leaking oil
Check and adjust.
7. Insufficient cylinder compression pressure
Check the valve and cylinder gasket for sealing
performance, check whether the piston is worn,
repair or replace.
8. Low temperature
Use start aid.