Method For Checking And Adding Oil In Damper Case - Komatsu PC290LC-11 Operation & Maintenance Manual

MAINTENANCE PROCEDURE
3.
Loosen drain valve (P) under the machine, drain the oil,
then tighten the drain valve again.
REMARK
• If the oil becomes thin thread condition, there is no
problem in stopping the draining operation.
• In low temperatures, swing the upper structure to raise
the oil temperature slightly before starting the oil drain-
ing operation. However, never swing the upper struc-
ture during the draining operation. This will cause
breakage of the swing machinery.
4.
Remove the cap of oil filler port (F).
5.
Add oil by the refill capacity.
6.
Check the oil level. For the procedure, see "METHOD FOR
CHECKING OIL LEVEL IN SWING MACHINERY CASE,
ADDING OIL (4-54)".

METHOD FOR CHECKING AND ADDING OIL IN DAMPER CASE

Immediately after the engine is stopped, its parts and oil are still very hot, and may cause burn injury.
Accordingly, wait until they have cooled down before starting the work.
NOTICE
Park the machine on flat ground and stop the engine. When more than 30 minutes elapse after stopping
the engine, check the oil level.
1.
Open the door on the right side of the machine.
2.
Remove plug (G).
If the oil is insufficient, add it according to the following pro-
cedure.
1)
Remove plug (F).
2)
Add oil through oil filler port until it reaches to the low-
er edge of the hole of plug (G).
NOTICE
If excess oil is supplied, drain it to the specified
amount. It will cause overheat.
If the oil level is near the lower edge of the hole of plug (P), the oil amount is proper.
3.
Install plugs (G) and (F).
4.
Close the door.
4-58
k k
WARNING
MAINTENANCE