Komatsu PC210LC-6K Operation & Maintenance Manual page 217

Air bleeding procedure
Follow Steps 1 to 7 to bleed the air.
1. Bleeding air from pump
1. Loosen air bleeding plug
air bleed plug.
2. If oil does not ooze out from the plug, remove the drain hose from
the pump case, and add oil through drain port
case with hydraulic tank.
Oil will come out from the drain hose when it is removed, so se-
cure the mouth of the hose at a place highter than the oil level
inside the hydraulic tank.
3. After completion of the air bleed operation, tighten air bleeding
plug , then install the drain hose.
NOTICE
If the drain hose is installed first, oil will spurt out from the hole
of plug .
If the pump is operated without filling the pump case with hy-
draulic oil, abnormal heat will be generated and this may lead to
premature damage of the pump.
2. Starting engine
Start the engine according to "12.2 STARTING THE ENGINE". Keep run-
ning the engine at low idling for 10 minutes, and carry out the following
procedure.
3. Bleeding air from cylinders
1. Run the engine at low idling, and extend and retract each cylinder
4-5 times without operating it to the end of its stroke.
(Stop approx. 100 mm (4 in) before the end of the stroke)
2. Next, operate each cylinder to the end of its stroke 3-4 times.
3. After this, operate each cylinder 4-5 times to the end of its stroke
to completely bleed the air.
NOTICE
If, at first, the engine is run at high speed or the cylinder is oper-
ated to the end of its stroke, the air inside the cylinder may cause
damage to the piston packing or other parts.
, and check that oil oozes out from the
to fill the pump
24. SERVICE PROCEDURE
3-71