Gear Sets, Adjusting and Marking

Drive Pinion and Ring Gear Adjusting

• General notes:

• Careful adjustment of the drive pinion and ring gear is important for the service life and smooth running of the final drive. For this reason, the drive 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 position of quietest running is found by moving the drive pinion in an axial direction and at the same time lifting the ring gear out of the zero-play mesh position by the amount necessary to maintain the backlash within the specified tolerance.

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

• The deviation "r", which is related to 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 (drive pinion and ring gear) must only be replaced together as a matched pair.

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

• Maximum care and cleanliness are essential for achieving good results when performing repairs and taking measurements.

Gear Sets, Adjusting and Marking





1 Marking "0937" indicates Oerlikon final drive set with transmission ratio 37 : 9.

• Klingelnberg final drives "K937" or Gleasen final drives " G937" can be installed.

2 Gear set pairing number (312).

3 Deviation (tolerance) "r" is based on the test machine master gauge used in production. The deviation "r" is always given in 1/100 mm. Example: "25" means r = 0.25 mm

Ro - Length of adjustment master "Ro" of tester used.

Ro -Ring gear = 57.50 mm





R - Actual dimension between ring gear and face of pinion shaft at point with quietest running for this gear set. R = Ro + r

Vo - Hypoid offset