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Differential,
Final
Drive
ADJUSTING
DRIVE
PINION
AND
RING
GEAR
General
Notes
Drive pinion and ring gear se!tings are important for a long service life and quiet running of the
final drive. This is why drive pinions and ring gears are matched during production and checked
on special testing machines for the most favorable surface appearance and low noise levels in
both directions of rotation. The position of quietest running is determined by moving the drive
pinion in an axial direction, keeping the ring gear within specified backlash tolerances. The
deviation "r" from the design distance 'R" is measured and written on the face side of the drive
pinion. Ring gears and drive pinions are designed so that deviation "r" is always added to design
distance 'R", i.e. is always considered plus.
To distinguish this pinion from former pinions, of which deviation '~" was either plus or minus,
'~" on the head of the pinion is preceded by a capital 'N". Each pair of drive pinions and ring gears
receives a pair code and may only be replaced together.
R = Design distance (81.69 or 82.29 mm)
r = Deviation from R -quoted
in 1/100 mm
1 = Deviation r
2 = Pair code
3 = Backlash
Printed in Germanv
39 -10
Adjusting Drive Pinion
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