AIR TRACTOR AT-502A, Maintenance Section

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Maintenance Page 36 Air Tractor, Inc.
March 14, 2018 AT-502A/502B/504
5. Compressor Repair
Clutch Components
1. Armature dust
cover screw
4. Armature plate
7. Pulley & Bearing
Snap Ring
10. Field Coil
2. Armature dust
cover
5. Clutch Shims
8. Pulley & Bearing
Assembly
3. Shaft nut
6. Rotor Bearing
Dust Cover
9. Field Coil Snap
Ring
A. Clutch Removal
a) Armature Nut-Removal
•
If armature dust cover is present, remove the 3 or 6 bolts
holding it in place and remove cover. If auxiliary sheet
metal pulley is present, remove the screws holding it in
place, then remove pulley.
•
Insert pins of armature plate spanner into threaded holes
of armature assembly.
•
Hold armature assembly stationary while removing
retaining nut with 3/4", 19mm or 14mm socket wrench, as
appropriate.
b) Key Shaft Armature-Removal
•
Remove armature plate assembly using puller. Thread 3
puller bolts into the threaded holes in the armature
assembly. Turn center screw clockwise until armature
assembly comes loose.
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