Komatsu PW118MR-11 Operation & Maintenance Manual page 402

MAINTENANCE PROCEDURE
3.
By using the filter wrench, loosen cover (7) of KCCV (1).
At this time, tube (5) and hose (6) rotate together with cov-
er (7).
4.
After removing cover (7) from ventilator body (8), remove
element (9).
Oil may be accumulated in or sticking to the cover (7) and
element (9). Take care not to spill the oil when replacing
the element.
REMARK
When the ambient temperature is low, water or emulsified
matter may stick to the inside of KCCV because of con-
densation of water vapor in the blowby gas. However, if
the coolant level is normal, it is not a problem.
5.
Apply engine oil to O-rings (11) (2 pieces) fitted to the top
and bottom of the new element and insert the element into
the body.
REMARK
You can install the element with either side up.
6.
Replace O-ring (10) of ventilator body (8) with new one
and apply engine oil to it, and then install cover (7) to the
body.
Tighten the cover firmly with the hand until you cannot
tighten any more.
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MAINTENANCE