Replacing O Rings In The Hydraulic; Cylinder - Stiga Titan Series Workshop Manual

3.1.4 Replacing O rings in hydrau-
lic cylinders
Lifting cylinder 1134-6801-01
1. Drain the oil through both the connec-
tions.
2. Slide in the piston to the end (does not
need to be right to the bottom).
3. Remove the circlip using circlip pliers.
4. Carefully tap in the collar approx. 5-
10 mm, tap on the steel beside the
scraper.
5. Grasp the bar and pull out until it
locks.
6. Remove the O ring from the circlip
groove.
7. Tap the collar in carefully another 25
mm.
8. Remove the circular locking rings,
take care not to mark the pipe (can be
difficult to polish out).
9. Grasp the bar and pull out. The piston
seal may stick in the circlip groove, if
this occurs push the piston in again
and pull out with greater force.
10. Look inside the pipe and at the bar, if
there are scratches, rust etc. stop and
replace the whole cylinder.
11. If the pipe and bar are ok, remove the
piston seal, heat the piston and the
bar at the end, when the adhesive car-
bonises there will be a small white
cloud.
Note Do not heat the sealing surface
of the piston.
WORKSHOP MANUAL
TITAN
Chapter
3 - Steering system
12. Remove the piston using a wrench.
Be careful when removing the
piston because it is very hot.
13. Wait until the bar has cooled, then re-
move the collar.
14. Polish off the adhesive from the
threads in the piston before replacing
the seal.
15. Remove all seals.
Note Sealing surfaces are sensitive
to scratches, take care not to
use sharp objects or steel.
16. Clean the piston and collar so that
they are free of contamination.
17. Install the new seals.
Note In this position all surfaces
must be visually checked for
scratches and other contamina-
tion.
After all seal changes the cylinder must
be reinstalled.
1. Polish the surface at the lock ring so
that there are no sharp edges.
2. Clean the cylinder pipe so that it is
free of contamination and other dirt.
3. Polish the piston shaft so that it is free
of contamination.
4. Polish off the adhesive from the
threads on the shaft. Clean using sol-
vent.
5. Apply a little oil inside the collar.
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