Page 537 - Foton Workshop Manual - Auman EST-M

Engine section – Engine (Cummins ISF3.8) EG - 21

IN

Failure phenomenon Possible reason Failure elimination
DI
Intake system resistance exceeding Check the intake system resistance. Clean or replace the

technical specification air filter and intake pipe if necessary
EG
Intake or exhaust leaking Check if the intake system and exhaust system leak

Fragments in the system or friction TR
If necessary, replace the turbine booster
between the rotor and housing

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

booster
Exhaust system resistance not meeting FR
Check the resistance of exhaust system
specification
The heater starting auxiliary device of Check if the intake manifold heater is blocked or has ST
intake manifold is blocked or choked accumulation of soot

Check if the turbine booster is broken Measure the gap BR
Turbine booster worn or broke
between the turbine impeller and compressor impeller
BW
Refer to engine running rough or misfiring failure
Engine misfiring
diagnosis
Verify if the idle speed setup is correct Increase the idle EL
Engine idle speed too low
speed

Check if the fan hub, generator, compressor and hydraulic

Belt driving accessory failed pump interfere Separate the belt driving accessories and
check if there is vibration

Fan loose, broken or not balanced Check the fan

Check the hydraulic pump and air compressor Separate
Gear driving accessories failure
Engine vibration too the gear driving accessories and check if there is vibration

much Engine suspension worn, broken or not
Check the engine suspension
correct

Compare the drving system parts with the engine and
Dynamic driving system parts failure or
equipment specifications. Separate the driving system
not correct
parts and check if there is vibration

Flywheel or flexible connecting disc Check the flywheel or flexible connecting disc and

screw loose or broken installing screw

Flywheel housing not aligned Check the flywheel housing alignment

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

EG-021