Tools Required
|     •  | J 38868  Lower
Gear Unit Assembly Remover/Installer | 
 
- Attach the J 38868 
 and the J 6129 
 onto the main shaft.
 
- Align the bolt hole in the center support with the bolt hole in
the case and carefully lower the gear unit assembly (640-672) into the
case.
 
- Remove the tools.
 
- Install the center support
retaining ring (633) using the J 28585 
. The end gap of the retaining ring (633) should be located
at the nine o'clock position with the beveled edge of the retaining ring facing
up.