Operation Manual of WEICHAI GENSET
5) Install the filter on the filter cover,
tighten the filter until the washer fits
with the filter cover surface, and then
tighten 3/4-1 turns to seal it (tightening
torque is 12.7 N·m).
6) Check and clean the drain plug and
washer, and then tighten them.
7) Add new lubricating oil between
the upper and lower scale lines of the
oil dipstick.
8) After replacing the oil, start the set
and run at idle speed. Check the drain
plug and filter for leakage.
Fig. 5-6 Replacement of oil filter
Oil drain
valve
9) Shut down and wait for about 5
min before checking the oil level. If the
oil level drops below the lower scale
line, add lubricating oil between the
upper and lower scale lines of the oil
dipstick.
Caution! The lubricating oil shall be
filled between the upper and lower
scale lines of the oil dipstick, because
too much lubricating oil will flow into
the combustion chamber from the
clearance between the cylinder and
the piston to form carbon deposit.
These carbon deposits will increase the
compression ratio of the engine and
increase the tendency to generate
knocks; carbon deposits in the cylinder
are red and hot, and can easily cause
premature combustion, such as falling
into the cylinder will aggravate the
wear of the cylinder and piston and
accelerate the contamination of
lubricating oil. Besides, excessive
lubricating oil will increase the mixing
resistance of the crankshaft connecting
rod and the fuel consumption.
Fuel system
Fuel quality grade
Light diesel is used as fuel for diesel
engine. Fuel of the specified grade shall
be used, and its sulfur content shall not
exceed 0.5%.
Selection of fuel grade (according to
GB252-2000)
GB252 10# light diesel: suitable for
diesel engines with preheating
equipment;
GB252 5# light diesel: suitable for use
in areas with a minimum temperature
above 8℃;
GB252 0# light diesel: suitable for use
in areas with a minimum temperature
above 4℃;
GB252 -10# light diesel: suitable for use
in areas with a minimum temperature
above -5℃;
GB252 -20# light diesel: suitable for use
in areas with a minimum temperature
above -14℃;
GB252 -35# light diesel: suitable for use
in areas with a minimum temperature
above -29℃;
GB252 -50# light diesel: suitable for use
in areas with a minimum temperature
above -44℃;
For diesel engines, the use of low-
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