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06/2002 E dition S tudent Guide HS-50 Advance d I 12 Preve ntive Maintenance 80 12.12 M a intenance work on the valve plu ngers 12
Student Guide HS-50 Advanced I 06/2002 Edition
12 Preventive Maintenance
79
Standard sleeves
a Check that the O-ring is lying closely against the sleeve. Replace the O-ring if it is too far away
or damaged.
s Clean the snap-fit O-ring with a lint-free cloth.
s Grease the O-ring by rubbing in the Unisilkon L250L (ideally between your fingers). Then ca-
refully pull the O-ring over the suction cup and into the groove.
Check that the O-ring is lying snugly in the groove.
Do not remove the O-ring in order to grease it, since this will stretch it and make it unusable.
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06/2002 Edition Student Guide HS-50 Advanced I
12 Preventive Maintenance
80
12.12 Maintenance work on the valve plungers
12
Student Guide HS-50 Advanced I 06/2002 Edition
12 Preventive Maintenance
81
You will need the following tools and consumables for maintaining the valve plungers:
– Lint-free cloths
– ISOFLEX TOPAS NCA 52 (Item no. 00328369-01, 00330850-01, 50 g tube)
– O-ring (Item no. 00345127-01)
– New valve plungers, if necessary (Item no. 00330711-02).
a Wipe the valve plungers with a dry lint-free cloth.
s Check the O-ring and the sealing lips of the valve plungers for damage and to ensure that they
are not seated too loosely.
: If the bottom four sealing lips are damaged or are seated too loosely, replace them with new
valve plungers.
d Grease the valve plungers extremely sparingly with a lint-free cloth moistened with ISOFLEX
TOPAS NCA 52.
There must be no visible grease residues.
Make sure that there is no grease in the groove.
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