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S tud ent Guid e HS-50 A dvanced I 0 6/2002 E dition 12 Pr eventive Maintenance 79 St an dard s leeves a Chec k that the O-ring is lying closely against the sleeve. Replace the O-ring if it i s too far away or damaged . …

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06/2002 Edition Student Guide HS-50 Advanced I
12 Preventive Maintenance
78
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.
12
06/2002 Edition Student Guide HS-50 Advanced I
12 Preventive Maintenance
80
12.12 Maintenance work on the valve plungers
12