Doosan P158LE -III, Operation & Maintenance Manual

Page: 138 / 165

Maintenance of Major Components - 135 -
5.4.6. Handling
1) Precautions at engine
Operation following items must be observed at the starting, operation and stop of engine.
Item Care Items
At starting 1) Inspect oil quantity
2) After confirming that oil pressure rises
by starting engine with starter (until the
pointer of oil pressure gauge moves or
pressure indicating lamp operates),
the starting must be done.
2) If engine is started quickly, of course
beginning with every parts of engine, for
it revolves without oil that is to reach to
the turbocharger, the bearing’s abnormal
wear or stuck may be caused.
3) In case that oil, oil filter and lubricating
system’s part are replaced or engine
was stalled for long time (more than a
week), and in case of operation under
cold weather, loosen the oil pipe
connecting parts of turbocharger inlet,
and operate the starting motor until oil
comes out the connecting parts. Care
must be paid that after the confirming
above, retighten the pipe connecting
parts without fail, and proceed with the
normal starting.
3) In case that engine stalled for long time
and of cold weather, the fluidity of oil
may be get worse.
Immediately
after starting 1) Perform idling operation for about
5 min. immediately after engine
starting.
1) Sudden load at time soon after engine
starting and at the state when
turbocharger did not yet reach to smooth
revolution, if abrupt load is applied to
engine, some parts where oil did still not
reach may cause a burn to be stuck.
2) Various inspections must insure that
there are no leakage of oil, gas and
air.
2) If there are the leakage of oil, gas, air,
particularly oil, for the oil pressure
lowers, it causes a burn of bearing to be
stuck.
During
operation Following items must be confirmed.
1) Oil pressure at
Idling : 90 ~ 300 kPa (0.9 ~ 3.0 bar)
at full load : 300 ~ 650 kPa
(3.0 ~ 6.5 bar)
1) If the pressure is too low, abnormal wear
or stuck may be caused. Or if too high,
the oil leak may be generated.
2) When abnormal noises and vibration
are generated, slow down the
revolution and must stop it to
investigate the causes.
2) If the engine operation were continued
with abnormal noises and vibration, it
causes the engine trouble that can not
be repaired or some other troubles.
At stop 1) At stopping the engine, perform the
idling operation for 5 min. and then
stop it.
1) After heavy load operation, if the engine
were stopped suddenly, the heat would
be conducted to bearing parts from red
hot turbine wings that would result in
burning the oil to cause the stuck
bearing metal and revolving shaft.