Doosan GL08K, Руководство по эксплуатации и техническому обслуживанию

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Maintenance of Major Components - 173 -
5.5.4. Precautions for operation
1) Precautions for operation of engine
The following precautions should be observed when starting, operating, or stopping the engine:
Operation Caution Reason
When starting
the engine 1) Check oil level
2) Crank the engine with starter to
check the increase in oil
pressure(until the needle of
pressure gauge starts to move or
pressure indicator lamp is actuated)
before starting the engine.
2) Abrupt starting of the engine causes the
engine to rotate with oil not being
distributed not only to each part but also
to the turbocharger, resulting in
abnormal wear or seizure on the bearing
due to insufficient supply of oil.
3) When having replaced oil, oil filter
element, or lubricating parts, or
when having stopped the engine
for extended period of time, or in a
cold place, loosen the oil pipe
connections and operate the starter
motor until oil is discharged. After
completing the operation, be sure
to retighten the oil pipe connections
portion before starting the engine.
3) In the case of the engine s topped for
extended time or in a cold place, oil
fluidity within the pipes can be
deteriorated
Immediately
after starting 1) Run the engine at idle for 5 minutes
after starting off.
1) Applying load abruptly If load is abruptly
applied with the engine and
turbocharger rotating unsmoothly, such
parts that a sufficient amount of oil has
not reached can be seized up.
2) Check each part for leakage of oil,
gas, and air, and take proper
measure.
2) Leakage of oil, gas, and air (especially,
oil leak) causes drop in oil pressure and
loss of oil results in seizure of the
bearing.
During
operation Check the followings:
1) Oil pressure At idle: 0.8 kg/cm
2
or
more At full load : 3.0 ~ 4.8 kg/cm
2
1) Excessively low oil pressure causes
unusual wear or seizure of the bearing.
Too high pressure causes oil leakage.
2) If unusual sound or vibration is
heard or felt, reduce engine
revolutions slowly and locate the
cause.
2) The engine Is operated continuously
with unusual sound or vibration not
corrected, it can be damaged beyond
repair.
At stop 1) Run the engine at idle for 5 minutes
before stopping.
1) If the engine is put to a stop after being
operated at high load, heat from the red-hot
turbine blades is transmitted to the bearing
portion and burns oil to cause seizure of
the bearing metal and rotating shaft.