Repair
20
3A4096F
Reassembly
Use all new part included in the repair / service kit even
if the old parts do not appear to be worn or damaged
and dispose of old parts according to all regulations for
proper disposal.
1. Install u-cup seal (36) with lips facing up, and bush
-
ing (35) in air cylinder (3) (F
. 27).
2. Check Valve Assembly (19)
Coat the new check valve assembly (19) with a thin
layer of grease.
3. Use a smooth, long brass or aluminum rod, free of
sharp edges and burrs, to push the check valve
assembly (19) into place in the outlet tube (14) (F
28).
4. Piston Rod O-Ring (34a) and Piston Seal (4)
NOTE: Do not clamp
piston rod (34) in vise.
Use a clean cloth to wipe down the piston rod (34)
and piston (5) and remove any dirt or contaminants.
Inspect surfaces for any scratches or damage.
Replace damaged parts.
5. Apply a thin layer of grease to o-ring (34a). Install
o-ring over the grooves of piston rod (34) (F
NOTE:
If needed, a pick can be used to help seat
the o-ring over the grooves of the piston rod (13).
6. Push piston (5) over end of piston rod (34) until it is
seated on the rod (F
NOTE:
You should hear a pop sound when it is in
place correctly.
F
IG
. 27
F
IG
. 28
36
35
19
14
F
IG
. 29
F
IG
. 30
34
34a
5
34
