Pinion Shaft and Ring Gear

Pinion Shaft and Ring Gear

• Careful adjustment of pinion and ring gear is important for service life and smooth running of final drive. For this reason, the pinion and ring gear are matched together during manufacture, and checked to ensure a good mesh pattern and quiet running in both directions of rotation. The location for the smoothest running is determined by moving pinion axially whereby ring gear is moved far enough out of the backlash-free position so that the backlash is within specified tolerances.

• The object of the adjustment is to reproduce the setting for quietest possible running, as obtained on the test machine in production.

• The deviation, or tolerance "r" which is based on the master gauge "Ro" is measured for the final drive sets supplied as replacement parts and marked on the outer circumference of the ring gear. The final drive set (pinion and ring gear) may only be replaced together as a matched pair.

• Observe the general repair instructions for tapered roller bearings and shims.