Aimco UAN-611R, Repair Manual, Page: 8 / 15

January 2004
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Public Server/Manuals/UAN Pneumatic Nutrunner
Disassembly and Reassembly of Gear Section
Disassembly:
1. Using the flats on the angle casing to put your crescent wrench on, remove the second gear section (left
hand).
2. Remove the clutch casing (left hand) and then remove the first gear section (right hand).
3. Now remove the snap rings, bearings, gear cases, roller pin, and planet gears from the gear casings.
Inspection:
1. Inspect the teeth of the gear casing, internal gear, and planet gears for pitting and grooving.
2. Inspect needle rollers for wear.
3. Inspect bearings for side play and knocking.
4. Replace all worn parts.
Reassembly:
1. Grease all bearings, planet gears, gear casing, and internal gears.
2. Install snap rings, bearings, planet gears, needle rollers, and gear cages into gear casings and internal gears.
3. Install gear casings and internal gears on the casing and clutch casing. Note: Use a good service removable
thread locker on all threaded parts.