5 Series E34 525td (M51) TOUR
Backlash/tooth contact pattern adjustments
Secure special tool 00 2 500 (dial gauge holder) and measure
torsional face runout,
refer to Technical Data.
Caution!
The tooth contact pattern is always most important for a
perfectly adjusted pinion/crown wheel.
Basic rules for contact pattern adjustment,
refer to 33 12 ...
To check the tooth contact pattern, coat the crown wheel teeth
with printer's ink, turn in both directions several times and stop
crown wheel suddenly with a piece of hard wood.
A correction to torsional face runout,
refer to Technical Data,
and contact pattern is performed by changing the thickness of
both shims (1).
If backlash is too great, install a thinner shim on the crown wheel
end.
If backlash is too small, use a thicker shim on the crown wheel
end.
Axial displacement of the crown wheel of 0.01 mm signifies a
change in tooth flank clearance of 0.0076 mm.
Caution!
The total thickness of both shims may no longer be changed.
If a thinner or thicker shim is required to correct the tooth contact
pattern, the total thickness must be corrected with the second
shim, since otherwise the friction torque of bearings would be
changed again.
RA Replacing both bearings on final drive housing (Type M) - final drive removed -
BMW AG - TIS
23.01.2013 07:43
Issue status (12/2007) Valid only until next DVD is issued
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