BMW K75 Repair Manual page 316

Calculate preload at taper roller bearing
Comply with the following procedure to achieve the
necessary taper roller bearing preload or friction
coefficients:
Measure distance "m" from the contact surface ofthe
cover to the ball bearing seal.
Deductthe size ofthe spacer blocks
"h"
(arrows)
from the measured value
"m"!
Measure distance "h" from the ball bearing outer race
through the window in the measuring ring to the contact
surface ofthe coverwith depth gauge.
Subtract measurement "m" from measurement "h" to
arrive at the required shim washer tickness without
preload.
To achieve the required taper roller bearing preload, a
thicker spacing ring must be fitted.
See Technical Data, page 33 - 03.0fortable ofspacer
sizes.
Taper roller bearing preload: 0.05 ... 0.1 mm
( ~ app .
600 - 1600 N preloadforce)
m measure
h measure
d
9 measure
play without preload
+
specified preload
spacing ring thickness
Install housing cover
Check cord ring seal for damage and renew if necessary.
Grease cord ring seal slightly before installing.
Heat up housing cover gently to app. 80°C and fitto
housing .
Tighten retaining screws for housing cover in a crosswise
pattern.
Tightening torque:
Housing cover retaining screws 21
±
2 Nm
Models with reardrum brake:
Drive bushing for brake backplate into housing cover with
arbor BMW-Nr. 33 2 640.
Fill with gear oil (see Technical Data).
8.87
33 - 21.0