39-33
Drive pinion and ring gear,
adjusting
Note:
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 (tolerance) "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) may only be replaced together as a
matched pair.
Observe the general repair instructions for
Pa
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