Test values for friction torque of rear axle differential
Number | Designation | Model | Model Model 211.004 with code 450 | ||
BE35.31-P-1001-02G | Friction torque of drive pinion bearing (new tapered roller bearings) | Ncm | 215...245 | 215...245 | |
Test values for friction torque of rear axle differential
Number | Designation | Model | Model | ||
BE35.31-P-1001-02G | Friction torque of drive pinion bearing (new tapered roller bearings) | Ncm | 215...245 | 215...245 | |
100 589 02 59 00
129 589 01 07 00
001 589 49 21 00
Connecting piece
Torque meter
Pin wrench
P35.31-0276-01
1 Push pin wrench (040) and socket wrench bit (040a) onto joint flange (41) and carefully tighten hexagon collar nut until the specified friction torque is reached.
When tightening the hexagon collar nut, rotate the drive pinion several times and by applying some light blows to the rear axle housing, ensure that the tapered rollers are correctly positioned in the bearing track.
P35.31-0277-01
2 To check, push torque measuring instrument (040b) with connection piece (040c) onto socket wrench bit (040a) and spin drive pinion at approx. 60 rpm. Read off friction torque.
If the friction torque exceeds the specified torque, remove the drive pinion again and insert a new spacer sleeve.
P35.31-0278-02
Under no circumstances may the friction torque be reduced by loosening the hexagon collar nut (40) as otherwise the preload of the tapered roller bearings (43, 46) would be too low. The consequence would be play in the drive pinion while driving (47) and with it rear axle drive noise.
40 Collared hexagon nut
41 Joint flange
42 Radial sealing ring
43 Tapered roller bearing
44 Spacer sleeve
45 Shim
46 Tapered roller bearing
47 Drive pinion
48 Bearing washers
50 Rear axle housing
The tapered roller bearings (43, 46) of the drive pinion (47) must be installed with a certain pre-tension. This constant remaining preload is achieved by the spacer sleeve (44) located between the tapered roller bearing inner race and the drive pinion (47) being compressed when the hexagon collar nut (40) is tightened.
If the friction torque is too low when the drive pinion (47) is cranked, i.e. the preload of the tapered roller bearings (43, 46) is too low, the hexagon collar nut (40) should be tightened. If the specified friction torque is fallen below the drive pinion (47) is to be removed again and a new spacer sleeve (44) is to be inserted.