Page 540 - Foton Workshop Manual - Auman EST-M

EG - 24 Engine section – Engine (Cummins ISF3.8)

Failure phenomenon Possible reason Failure elimination

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

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

Fuel consumption too Ceiling mechanism adjustment not
Measure and adjust the top mechanism
much correct
Perform diagnosis to find the failed injector If necessary,
Injector failed
replace the injector

Separate the engine oil and check the filter to determine
Engine broken internally
the possible broken part

Engine idle time too long Do not run the engine at idle for long time

Fuel return pipe resistance Check if the fuel return pipe is blocked
Injector clamp screw loose Tighten the screw according to the specification

The O-ring of the injector is damaged or Dismount and check the injector. Replace the O-ring of
missing the injector

Engine oil mixed Perform diagnosis to find the broken injector If necessary,
Injector failed
with fuel
replace the injector
Injector gasket not correct Dismount the injector and check its gasket thickness

Check the output pressure of gear pump. If necessary,
Gear pump failure
replace the gear pump
Separate the engine oil and check the filter to determine
Engine broken internally
the possible broken part

Fan drive belt disconnected Check the fan drive belt If necessary, replace the belt

Fan drive belt loose Check the belt tension. Tighten the belt if necessary

Air-air cooler radiation fin, radiation fin
Check the air-air cooler, AC condenser and radiation fin,
or AC condenser radiation fin broken or
The air temperature
and clean it if necessary
in the intake manifold blocked by bits
is higher than the The air temperature sensor of intake Check the intake manifold temperature sensor
technical manifold fails in the working range corresponding to the error code and replace it if necessary.
specification
The fan shield is broken or missed, or the Check the shield and deflector. If necessary, repair,
air deflector is broken or missed replace or install it

Speed too low and engine not cooled Reduce the engine load Increase the engine (fan) speed by
down enough under high load shifting to the low speed control

EG-024