SER 323440-4
Air Motor
Revision (7-05)
6
Alemite, LLC
6. Unscrew the Coupling from the air motor Piston Rod.
• Rotate the entire Pump Tube assembly.
NOTE: For disassembly procedures of the
components in Air Motor Base (45), refer to
the Pump SER Service Guide for details.
Separate Motor from Pump (Divorced)
7. With the pump in a soft-jaw vise, remove Screws (53),
Lockwashers (52), and Nuts (51) that secure the Pump
to the Air Motor Housing.
8. Remove the Spring Clip that secures the air motor
Piston Rod to the Coupling.
9. Unscrew the Coupling from the air motor Piston Rod.
• Rotate the entire Air Motor assembly.
Air Motor
Head Assembly
10. Place the Air Motor vertically in a soft-jaw vise.
11. Unscrew Plug (2) from Head Assembly (28).
• Remove O-Ring (3) from the Plug.
12. Remove Plug (1) from Plug (2) as necessary.
13. Remove Screws (27) that secure Inlet Body (26) to the
Head Assembly.
• Remove the Inlet Body from the Head Assembly.
14. Remove O-Ring (25) from the Inlet Body.
15. Loosen Setscrews (6) that secure Caps (16) to the Head
Assembly.
• Unscrew each Cap from the Head Assembly.
16. Remove Springs (11) and (12) from each Cap.
17. Remove Gaskets (8) from the Head Assembly.
18. Lift Shuttle (24) upward and hold Trip Rod (34) with
an open-end wrench.
NOTE: Early model Trip Rods did not con-
tain a flat. Use a 5/32 " allen wrench to pre-
vent rotation of the Rod. See Figure 2.
19. Unscrew Nut (4) from the Trip Rod.
20. Unscrew Nuts (5) from Tie Rods (33).
• Remove the Head Assembly from the Tie Rods
21. Place the Head Assembly assembly on a flat surface.
22. Remove O-Ring (30) from the Head Assembly.
23. Remove the Shuttle, Toggles (10), Plungers (9), and
Slide Valve (23) from the Head Assembly.
24. Remove Screws (22) and Lockwashers (21) that secure
Valve Guides (20), Stops (19), and Valve Seat (18) to
the Head Assembly.
• Remove the Valve Guides and Stops.
I M P O R TA N T: R e m o v e t h e Va l v e S e a t
squarely from the Head Assembly. Should the
Valve Seat cock during removal, realign and
start again.
25. Remove the Valve Seat from the Head Assembly.
26. Remove Gasket (17) from the Head Assembly.
27. Remove Retaining Ring (32) that secures Washer (31)
and V-Packing (29) in the Head Assembly.
• Remove the Washer and the V-Packing.
28. Remove Plug (7) from the Head Assembly as
necessary.
29. Place each Cap assembly in a soft-jaw vise.
30. Unscrew Cylinder (13) from the Cap.
• Use a drift and a small hammer.
31. Remove Washer (14) and Spring (15).
Air Motor Base
32. Remove Tube (44) from Air Motor Base (45).
33. Remove O-Rings (43) from each end of the Tube.
34. Remove Cylinder (42) from the Air Motor Base.
35. Remove the Trip Rod and Piston Rod assembly from
the Air Motor Base.
IMPORTANT: Do not grip the flats of the
Piston Rod during the following procedure.
36. Grip Piston Nut (39) and Piston Retainer (35) and
unscrew the Piston Nut until it seats on the shoulder of
Piston Rod (41).
• Continue rotation to separate the Piston Retainer
from the Piston Rod.
37. Remove the assembly from the Piston Rod.
38. Unscrew Nut (40) from Trip Rod (34).
• Separate the Piston Retainer from the Trip Rod.
39. Remove O-Ring (36) from the Piston Retainer.
40. Remove Washers (37) and Packing (38) from the
Piston Nut.
41. Remove O-Ring (30) from the Air Motor Base.
42. Unscrew the Piston Nut from the Piston Rod as needed.