Service; Cylinder, Seal Assembly Replacement - Quicke Q20 Technical Manual

SERVICE

Cylinder, seal assembly
replacement
Disassembly
Begin by drawing out the piston rod at least 100mm.
Remove the retaining ring with pliers, and Carefully
Extract the O-ring. Using a plastic mandrel, to protect the
piston rod from damage, tap in the bearing so that the
retaining ring is uncovered, but not so much as the bearing
will throttle the air flow in the outer oil connection. Loosen
the retaining ring with a small screwdriver.
Thereafter withdraw the piston rod from the ram. For
mechanical self-leveling loaders with equal displacement
implement rams, the ram is equipped with a piston guide.
The stop screw must be removed from the ram barrel, and if
the guide slides out of the barrel with the piston rod, it must
be removed from the end of it. If the guide does not remove
with the piston rod, make sure all the stop screws are
removed, then carefully tap the barrel opening on a wooden
block until the guide slide to the end where it can be
removed.
Following this, the piston and bearing both must be
removed from the piston rod by unscrewing the piston from
the rod. Do not use any tools that could damage the
piston rod or the barrel. Again, if the ram is of the self-
leveling type, the piston rod is threaded into both ends of
the piston.
When the Hydraulic Ram has been disassembled, remove
the scraper, if it is damaged, with the aid of a screwdriver.
Note: Prior to replacing Hydraulic Ram Seals, check that
the piston, piston rod, slide-face of the bearing and the
inside of the barrel are free from defects and make sure
there are no scratches in the seal slot.
Should any of above damage exist, proper measures must
be taken to correct the defects before reassembling the seals
and hydraulic ram.
Replacing bearings seal
Remove the seal with the aid of a knife. Ensure that the
knife does not scratch the bottom of the seal slide.
2005-09
Loosen the retaining ring with a small screwdriver
Remove the scraper
Remove the seal
Service
6:1