S0602170K
Page 86
Axle (ZF AP 420R)
F. Install the two bearing caps and
tighten them using hex. head screws.
NOTE:
Pay attention to the match
marks, see Figure 186.
NOTE:
See “Torque Limits for Screws”
on page 6.
Adjustment of Bearing Preload and
Backlash
1. Attach dial indicator right angled on the
outer diameter of the tooth flank / crown
wheel. Adjust the adjusting nut on the
crown wheel side until the required
backlash - see value engraved on the
crown wheel outer diameter - is obtained.
NOTE:
See “Special Tools” on page 15.
2. Screw in the adjusting nut (opposite the
crown wheel side) until the differential
bearing is free of play. Now, tighten
adjusting nut further for 2 notches to obtain
the required bearing preload of the
differential bearing 3 - 4 Nm (26.5 - 35.4 in
lb).
3. Check backlash again and correct if
necessary.
NOTE:
At this step make several full
revolutions of the differential.
NOTE:
Determine yoke width e.g. "CK"
258 +0.1 mm (10.1575 +
0.0039 in).
Figure 186
Figure 187
Figure 188