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Technical Handbook
Hydraulic Cylinders
Service
9279 02-09
Publ. Gr. S.
1170
Single action V type piston seals with support
ring
On single action V seals it is always the long side that seals
against the static and the short side that seals against the moving
surface.
Use a screwdriver to remove the seal, see illustration. Lever out
and twist up the seal. It is extremely important that the screwdriv-
er only comes into contact with the inside of the V shape so that
it cannot touch and thereby damage any sealing surface. A score
from a screwdriver on the sealing surface will have a disastrous
effect and cause major leakage.
The seal must always be fitted coupled together with the support
ring.
Always fit by hand, no tools should be used as the surface of the
piston can be easily damaged.
To make fitting easier, the seal can be warmed in hot water to sof-
ten it.
Lubricate with hydraulic fluid.
KL1013
1
2
3
4
5
6
1. Hydraulic pressure
2. Seal pressed outwards against cylinder pipe
3. Seal pressed inwards against piston
4. Sealing surface, cylinder pipe
5. Sealing surface, piston
6. Screwdriver
KL1014
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