Gast 2567 Series Oilless Vacuum Pumps and Compressors - Manual (Page 5)

9. Flip unit over so the dead end is up.
10. Install vanes into rotor.
11. Replace dead end plate over shaft and body
aligning bolt holes.
12. Place deflector and bearing on shaft and slide both
down to bearing journal.
13. Drive two dowel pins into body through drive end
plate.
14. Torque bolts to 75-125 in. lbs.
15. Place large cupped end of one Belleville spring
down against the outer bearing race. Place a flat
washer on top of Belleville spring.
16. Use snap ring pliers to place snap ring over
Belleville spring and press into groove in dead end
plate.
17. Secure a dial indicator onto dead end shaft to
check axial movement. Push in indicator to allow
for a free travel of .01” to the rear.
18. Install drive end cap onto drive end plate. Hand
tighten until end cap bottoms out on bearing.
19. Tighten drive end cap with a spanner wrench or a
special adapter tool until drive end cap is tight.
Dial indicator should move back to .007” or .0075”
for the 2067/2567 Series models, .0049” to .0055”
for the 1567 Series model and .0035” to .004” for
the 1067 Series model to assure proper clearance.
If reading does not fall into range for the model in
question, disassemble and add or remove shims
until proper clearance range is achieved.
20. Remove drive end cap and apply several drops of
Loctite 222 to threads. Replace drive end cap and
tighten. Check with factory for clearances.
21. Press dead end cooling fan on and center it so it
will not hit dead end plate or fan guard.
22. Replace dead end fan guard and attach with four
bolts.
23. Replace drive end coupling on drive end shaft.
Tighten set screws.
24. Place motor on motor bracket and attach with four
motor bolts.
25. If motor is 3-phase, check that motor rotates
properly.
26. Push motor coupling flange against coupling
sleeve until tight. Tighten set screws in motor
coupling flange.
27. Replace coupling fan guard and attach with two
guard bolts.
Disassembly
1. Remove two fan/coupling guard screws. Remove
guard.
2. Remove four motor bolts. Remove motor.
3. Loosen two set screws in coupling flange. Remove
coupling flange from drive end shaft.
4. Remove four screws from the dead end fan guard.
Remove guard. Use a pulley puller to remove fan.
5. Remove eight dead end plate bolts with the special
adapter tool.
6. Use a small hammer to carefully tap on dead end
plate to remove. Do Not use a screwdriver.
7. Remove the dowel pins from the body and dead
end plate.
8. Remove vanes. If vanes are stuck, use needle
nose pliers to help loosen and remove vanes.
9. Use snap ring pliers to remove snap ring.
10. Remove Belleville springs, flat washer, bearing and
deflector. Not how items are placed for reassembly.
11. Place unit with the drive end shaft in an upright
position on a protected surface. Remove rotor.
12. Use an adjustable spanner wrench or a special
adapter tool to remove drive end cap, bearing and
deflector from drive end plate.
Do Not disassemble any further parts. The factory has
determined the exact top and overall end clearances.
Further disassembly will change these settings.
Cleaning
1.
Clean all parts with solvent and remove all solvent
from parts.
2. Use a 12” smooth file on the faces of end plates
and body to remove burrs.
3. Use file to carefully clean out vane slots in rotor.
4. Use emery cloth to clean and remove burrs from
body bore and rotor outside diameter.
5. Clean filed parts again with solvent then remove all
solvent from parts.
Reassembly
1.
Place drive end plate on shim aligning bolt holes.
2. Install eight drive end bolts by hand. Do Not
tighten at this time.
3. Drive two dowel pins into body through drive end
plate.
4. Torque bolts to 75-125 in. lbs.
5. Place rotor with drive end up in a fixture on an
arbor press.
6. Place body and drive end plate assembly over
shaft so that drive end plate is on the face of rotor.
7. Place deflector and bearing on shaft and slide both
down to bearing journal.
8. Use bearing pusher and arbor press to press
bearing down all the way. Bearing pusher must
make contact with both inner and outer race of
bearing.
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