Yuchai YC310LC-8, Operation Manual

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Reasons of Technical Failures and Solutions
Failures Reasons Solutions
1. The engine
cannot start
or is difficult
to start
●
The problem of the starter motor
●
Replace or repair the starter motor
●
Insufficient battery charge
●
Charge or replace the battery
●
Improper use of the warm-up lines or plugs
●
Repair or replace the plugs
●
Incorrect injection time
●
Check the injection timing
●
Blockage of the pipeline
●
Clear the oil line
●
Blockage of the fuel filter
●
Clean or replace the fuel filter
●
Water, dust or air in the fuel system
●
Exclude the air and clean the oil lines
●
Dirty or low-pressure fuel injection nozzle
●
Repair in the local service center
●
Failure of the fuel pump
●
Consult the agents of the company
●
Fuel shortage
●
Refuel
●
Blockage of the intake and exhaust system
●
Make the intake and exhaust system
unimpeded
2. Knock,
irregular
running or
shutdown of
the engine.
●
A large amount of blow-by gas
●
Consult the agents of the company
●
Blockage of the fuel filter
●
Clean the fuel filter
●
Dust or air in the fuel system
●
Exclude the air and clean the oil lines
●
Fuel filter blockage, dirty or defective nozzle
●
Repair in the local service center
●
High-pressure pipeline damage
●
Replace the high-pressure pipeline
●
Fuel shortage
●
Refuel
●
Unadjustable speed governor connection
●
Consult the agents of the company
●
Faulty fuel pump
●
consult the agents of the company
●
Incorrect injection timing or the stuck nozzle
●
Check the injection timing and the
nozzle
3. Power of the
engine is
reduced
●
Fuel mixed with air
●
Exclude the air
●
Unsmooth oil supply
●
Check and wash
●
Injection timing changes
●
Adjust following the value required
●
Bad work of the injector
●
Check the working pressure and
atomization of fuel injection
●
Blockage of the air filter
●
Clean the filter element
●
Incorrect clearance of the intake and
exhaust valves or the valve is not sealed
●
Adjust the valve clearance
●
Broken air cylinder pad and leakage
●
Replace the air cylinder pad
●
Bad work of the fuel pump
●
Consult the agents of the company
●
Engine overheating
●
Check if the coolant used is correct, if
the pump and the belts are too loose, if
necessary, repair or replace
immediately. And clear the obstructions
in the waterway
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