Gast NL52 - Manual (Page 5)

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11. Tap dowel pins into body and install end plate
bolts. Tighten bolts.
12. Set end clearance as required by model:
NL22-NL52 models - use the bearing taper from
the Tool Kit to lightly tap on the inner race of the
dead end bearing to free up and center the rotor
in the body.
13. Reattach end cap.
Major Rebuild:
1.
Remove the end cap.
2. Remove dead end plate bolts.
3. Remove dead end plate. (Use factory issued tool,
do not use screwdriver to remove the end plate.)
4. Remove the dowel pins from the body and push
back into end plate until flush or just below the
machined surface of the dead end plate.
5. Remove rotor using an arbor press.
6. Remove vanes and ejection mechanism if
reversible. (Ejection mechanisms may consist of
vane springs, pins, caps or cam rings.)
7. Remove shaft seal and bearings from drive end
plate and bearing from dead end plate. (Use
factory issued tool.)
8. Do Not remove drive end plate bolts or drive end
plate.
9. Clean parts. Check for scoring on the end plates
and rotor assembly. If scoring exists, send unit to
a Gast Authorized Service Facility.
10. Place the drive shaft of the rotor assembly
through the drive end plate.
Press the drive bearing onto
the drive shaft using a factory supplied bearing
pusher.
11. Using the bearing taper from the Tool Kit, lightly
tap on inner race of the drive end bearing to snug
up rotor to drive end plate.
12. Install new vanes as required by model:
All single rotation units - the angle cuts on the
vane face to center of the rotor.
13. Place the proper end plate gasket on the body of
dead end. If the original is damaged, replace
with a new one supplied in the service kit.
If your air motor uses O-rings, place the new
O-rings in the body groove. Some models do not
use end plate gaskets or O-rings.
14. Place the dead end plate on the body.
15. Install the dead end bearing and press into place
with bearing pusher tool from tool kit.
16. Install the dowel pins.
17. Fully tighten the remaining bolts.
18. Set end clearance as required by model:
NL22-NL52 models - use the bearing taper from
the Tool Kit to lightly tap on the inner race of the
dead end bearing to free up and center the rotor
in the body.
19. Apply a small amount of grease to bearing seal
and install the drive end bearing seal by pressing
flush with bearing pushing tool from Tool Kit.
20. Reattach end cap.
Disposal
(Please note current regulations)
Parts of the air motor or air powered gear motor,
shafts, cast iron or aluminum castings, gear
wheels as well as rolling contact bearings may
be recycled as scrap metal.