Page 472 - Foton Workshop Manual - Auman EST-M

DI - 418 Diagnosis - Mechanical fault diagnosis

Failure phenomenon Possible reason Failure elimination
Check the engine oil level Verify if the engine oil
Engine oil level higher than specification scale caliberation and oil sump capacity is correct
Filling engine oil to specified level
Check and clean the crankshaft box respirator
Crankshaft box venting system blocked
and degassing pipe
Air compressor worn excessively or
Replace or reinstall the air compressor
broken inside
Crankshaft box gas (gas
Check the sealing parts of turbine booster
blowby) too much Turbine booster seal leaking
compressor and worm

Valve stem clearance too big or valve stem
Check the valve rod and sealing part
oil seal broken
Cylinder valve guide pipe worn Check if the valve pipe is broken and replace the
excessively cylinder head if necessary
Check if the piston and piston ring is worn or
Piston or piston ring worn or broken
broken

Fuel level low in the fuel tank Filling oil tank
Check if the fuel pipe, fuel joint and fuel filter
Fuel leaking
leak
Fuel inlet resistance Check the fuel inlet resistance

Check if there is air in the fuel system.
Starting fuel pressure too Air in fuel system
Thoroughly discharge the air in the fuel system
low
Fuel joint loose Tighten all the fuel pipe joints and connection
The fuel suction standpipe in the fuel tank
Check and repair the standpipe
is disconnected
Check the output pressure of high pressure oil
High pressure oil pump failed
pump and replace it if necessary.
Use a diagnostic tester to detect whether the
reading of the opening percentage of the
Accelerator pedal Accelerator pedal or accelerator or joystick is correct and it shall be
failure 100°/., when the pedal is ressed and it shall be
0, when the pedal is released If necessary,
The engine reduces speed
calibrate the accelerator pedal
slowly
Perform the test of stopping oil for a single
Injector failed
cylinder and replace the injector if necessary

Check if the clutch is broken. Repair or replace
Clutch failed or not working correctly
it when necessary

DI-418