Westfalia OSD 6-91-067, Instruction Manual

Page: 123 / 206

Westfalia Separator
Mineraloil Systems GmbH
123
2058-9001-101 / 0506
4.3.9 Reworking the sliding piston
The bowl seal consists of
•
the sealing surface A of the sliding piston (Fig. 183) (Sealing surface A as de-
livered 2 mm high) and
•
the polyamide gasket B of the bowl top (Fig. 185).
Fig. 183
When worn, the sealing surface A of
the sliding piston can be remachined
up to max. 0.5 mm several times be-
fore it has to be replaced.
When the first erosion marks (0.2
mm deep) are detected, i.e. as soon
as the bowl starts to leak:
•
Remachine the sealing surface of
the sliding piston.
Fig. 184
•
When remachining, make sure that
– the sealing surface is machined
cleanly and
– shoulder H at diameter X is still at
least 1.5 mm high .
Standard parameters for remachining the sealing surface
Surface quality Ra 2 µm (Rz 12.5 µm)
Tool Hard metal steel of ISO quality M 30 or K 20
Speed 55 min
-1
Cutting depth max. 0.15 mm
Forward feed max. 0.1 mm/revolution