Repair
7. Slide the air piston (124) out of the top of the
air motor base (118). Remove o-ring (120) and
gasket (102) from inside the air motor base.
Remove o-ring (123) from groove on outside of
base. Inspect all parts, including the spring (122)
in the air motor base.
NOTE: Do not remove the spring (122) and
retainer (121) if you do not have to.
NOTE: If the white bushing (119) needs to
be replaced, use an arbor press to remove.
Alternate tapping on the edges with a hammer
and a nylon rod or metal punch also will work.
The spring (122) and retainer (121) must be
removed first.
Figure 6
Air Motor Reassembly
Cylinder threads are sharp. Always wear protective
gloves to prevent cuts.
1. If the bushing (119) was removed, use an arbor
press and seat it all the way into the air motor
base (118). Alternate tapping using a hammer
and nylon rod or metal punch also works.
2. Install the retainer (121) into the air motor base.
Tap on the retainer as needed to ensure it seats
all the way.
3. If the spring (122) was removed, put it into the air
motor base (118), with the wider end down. Use
a screwdriver to pop it into the groove.
4. Lubricate and install o-ring (120) and gasket
(102) on the inside of the motor base. Lubricate
and install o-ring (123) on the outside.
5. Use flats to clamp the base (118) into a vise.
6. Lubricate the shoulder and the bottom outside
portion of the piston (124). Then, lower it into the
air motor base (118).
3A2977K
13
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