Aimco URW Series, Repair Manual

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October 2006
- 6 -
Disassembly and Reassembly of the Gear Casing
(cont.)
Reassembly
1. Grease all Bearings, Gears, and Internal Gears.
2. For the URW-6 Only:
a. Install the Bearing, Internal Gear, and Allen Head Dog Point Screw into the Gear Casing.
b. Install the Needle Roller Bearing into the Planet Gears and both Planet Gears into the Gear Cage. Put
the Roller Pins into the Gear Cage and through the Planet Gears.
c. Install the Spacer onto the Gear Cage and install the Gear Cage into the Gear Casing. Install the
Bearing into the Gear Cage.
d. Install the Gear Casing onto the Air Motor Casing.
e. Install the Connector onto the Gear Casing and install the Thrust Washers, Thrust Bearing, Spacer,
Bearing, and Cam into the Connector.
3. For the URW-8N & 9N:
a. Install the Internal Gear into the Casing.
b. Install the Planet Gear Bushing (URW-8N only) into the Planet Gear and install them into the Gear
Cage. Install the Needle Rollers into the Gear Cage.
c. Install the Gear Cage into the Casing and install the Key into the Gear Cage.
d. Install the Bearing, Thrust Rear Spacer or Spacer, and Thrust Bearing onto the Cam. Press the Cam
onto the Gear Cage making sure to line up the Key in the Gear Cage with the key way in the Cam.
Note: The Gear Cage should extend out past the Cam about 2mm.
4. For the URW-8:
a. Install the Internal Gear into the Gear Casing.
b. Install the Planet Gear Bushing into the Planet Gears and install the Planet Gears into the Gear Cage.
Install the Needle Rollers into the Gear Cage.
c. Install the Gear Cage into the Gear Casing and install the Key into the Gear Cage.
d. Install the Bearing, Thrust Rear Spacer or Spacer, and Thrust Bearing onto the Cam. Press the Cam
onto the Gear Cage making sure to line up the Key in the Gear Cage with the key way in the Cam.
Note: The Gear Cage should extend out past the Cam about 2mm.
5. For the URW-10N, 12N, 12NA, & 12NB:
a. Install the Needle Roller Bearing into the Planet Gears and both Planet Gears into the Gear Cage. Put
the Planet Gear Pins into the Gear Cage and through the Planet Gears.
b. Install the Spacer onto the Gear Cage and install the Gear Cage into the Gear Casing. Install the
Bearing onto the Gear Cage.
c. Install the Bearing and Cam onto the Gear Cage.