Hyundai Robex 22-7 Service Manual page 78

4. Disassembling the piston assembly
Hold the piston rod assembly with a vice.
• Put the waste between hard wood and the
piston to prevent the surface sliding from
being damaged.
• Set the piston rod assembly on a level block
so that it becomes parallel to the level block.
Be careful because the piston rod assembly
may come out of the vice and be damaged if
it is set diagonally.
11-2-2 Procedure for disassembling inner parts
1. Remove the piston assembly from the piston
rod assembly (after removing the set bolts).
Then remove the cushion bearing in the
direction of the arrow.
2. Disassembling rod cover
Put piston rod assembly on a holding jig on
the work bench.
Make a working face for the rod cover
assembly on the workbench and move the
rod cover to and fro to remove it.
Remove the backup ring then the O ring with
a screwdriver. If they are to be reused, be
careful not to damage them.
3. Disassembling the packing assembly
Remove the packing by prying it with an eyeleteer or a screwdriver. Be careful not to
damage the groove of the cover and piston. Because it is difficult to remove the dust
seal and rod packing without damaging them, remove them by inserting a eyeleteer
or a similar tool and prying them out. Be careful not to damage the groove on the cover
and piston.
4. Disassembling the piston rod and cylinder
tube assembly
As the bushes are pressed fit to the rod
head, press them out with a pressing machine
to remove them. For a spherical bearing, the
snap ring must be removed first.
Backward
Forward
11-4
Hard wood
Holding jig
Packing case
Press (example of
a cylinder rod)