Reworking The Sliding Piston - Westfalia OSD 6-91-067 Instruction Manual

Westfalia Separator
Mineraloil Systems GmbH
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
Fig. 184
Standard parameters for remachining the sealing surface
Surface quality
Tool
Speed
Cutting depth
Forward feed
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.
• 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.
Ra 2 µm (Rz 12.5 µm)
Hard metal steel of ISO quality M 30 or K 20
-1
55 min
max. 0.15 mm
max. 0.1 mm/revolution
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