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Fault mode 14˖Rough running at idle speed
Possible cause Correction
Engine temperature is too low Warm up the engine
The load at idle speed is too heavy (more than 50
horsepower)
Reduce the load at idle speed
Leakage of the intercooler or its pipeline Check intercooler and its pipeline for leaks
Leakage of the intake manifold or pipeline Check the intake manifold or pipeline for leaks
Engine support problem Check the engine support and cushion
Alternator fault Disconnect the alternator to check the problem
Valve clearance error (s) Check and adjust valve clearance
Engine support problem Check the supporter and cushion pad of the engine
Fault mode 15˖Excessive vibration
Possible cause Correction
The engine runs unsteadily Refer to fault mode “Rough running or misfire”
Pulley or vibrator bolts or nuts loose Check and tighten loose bolts or nuts
Fan blade not in balance Loosen or remove fan belts and operate engine for
a short time at the r/min that the vibration was
present. If vibration is not present any more, make
a replacement of the fan assembly
Damage of fan or accessories Check, and replace relevant parts if required
The vibration damper is broken Check/replace the damper
Engine support problem
Check the supporter and cushion pad of the engine
for problem. Make replacement if necessary
Fault mode 16˖Diesel knock
Possible cause Correction
Air in the fuel system
Check for air in the system. Tighten or replace the
fuel joints, fuel pipes if necessary and then prime
the system
Poor quality fuel
Use the fuel specified in this manual and fill a
temporary tank with right high-quality one, with
which to run the engine and verify the fuel issue
Injection pump timing is not correct Check and adjust injection timing. Refer to 5.2 for
the procedure
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