Page 475 - Foton Workshop Manual - Auman EST-M

Diagnosis - Mechanical fault diagnosis DI - 421

Failure phenomenon Possible reason Failure elimination IN

Fuel grade not meeting the application or
Use high quality fuel to run the engine DI
fuel quality too bad

Ceiling mechanism adjustment not correct Measure and adjust the top mechanism
EG
Perform diagnosis to find the broken injector and
Injector failed
replace it when necessary
TR
Check the piston installation position and if there
Engine too noisy---piston Pinstall assembled incorrectly
are bits on the top of piston
AX
Connecting rod bent or not aligned Dismount and check the connecting rod

Connecting rod wrongly assembled Dismount and check the connecting rod FR

Dismount the piston and check if the piston pin
Piston pin or piston pin sleeve loose, worn
and and pin sleeve are broken, worn and correctly ST
or installed incorrectly
installed
Intake system resistance exceeding Check the intake system resistance. Clean or BR
technical specification replace the air filter and intake if necessary
BW
Check if the intake system and exhaust system
Intake or exhaust leaking
leak
EL
Fragments in the system or friction beween
If necessary, replace the turbine booster
the rotor and housing

Intake pipe or exhaust pipe contacts with Check if the air pipe, chassis and cab are in
Engine too noisy---turbine
the chassis or cab contact
booster

Exhaust system resistance not meeting
Check the resistance of exhaust system
specification

The heater starting auxillary device of Check if the intake manifold heater is blocked or

intake manifold is blocked or choked has accumulation of soot

Check if the turbine booster is broken Measure

Turbine booster worn or broke the gap between the turbine impeller and

compressor impeller

DI-421