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7.1.6
Serious vibration
Normally, it is caused by uneven working of cylinders, or by incorrect assembling.
Possible causes
Fixing methods
a.
The difference of compression ratio
and fuel distribution among cylinders
is considerable
b.
Air being in fuel pipes
c.
Diesel engine is wrongly aligned in
mounting,
or
fixing
bolts
are
somewhat loose.
d.
Piston knocking makes engine rough
working
Check and make adjustment
Bleed air
Align the engine and fasten the fixing bolts
again
Check nozzle of injector and advance angle of
fuel, make necessary adjustment
7.1.7
Engine overheat
Possible causes
Fixing methods
a.
Air leakage of piston rings
b.
Water coming into engine oil, oil
diluted and deteriorated, or too much
high or low the oil level.
c.
Too much tight the bearing fitting
d.
Water pump is broken or its belt is
too much loose, resulting in water
overheating
e.
Temperature regulator is out of work,
or insufficient water in tank
f.
Cylinder head gasket is broken
g.
Too much scale in water jacket
h.
Injector being seized
i.
Engine overloaded
j.
Advance angle of fuel is too much
Replace with new rings
Check and replace the engine oil or adjust the
oil level by making drainage or replenishment
Check and adjust
Check and adjust
Check and adjust the regulator or replenish
water
Replace it with a new one
Descale the water jacket
Replace it with a new one
Adjust the load
Adjust as per stipulation
7.1.8
Too much engine oil consumption
Possible causes
Fixing methods
a.
Engine oil of wrong category being
used
b.
Piston rings worn out
c.
Piston ring sticking, oil return hole in
piston ring groove plugged up
d.
Leakage of rear seal
e.
Too much high the oil level
Use the oil as specified
Replace them with new ones
Remove carbon deposit and clean the piston
Check, replace with new rear seal and its cover
Make down the oil level by draining