Test values for rear axle center assembly friction torque
Número | Denominação | Axle 740.6 | Axles 740.7 | |||
BE35.31-B-1001-02A | Preload (friction moment) of the pinion bearings | New bearing | Nm | 3...10 | 3...10 | |
Drive pinion
Número | Denominação | Axle 740.6/7 | |||
BA35.30-B-1001-06B | Nut attaching the drive pinion coupling flange | Nm | 860...900 | ||
001 589 49 21 00
Torque measuring equipment
717 589 00 31 00
Immobilization spanner
B35.30-0036-01
Check the friction moment of the bearings with the seals removed.
1 Install the flange (1) (with the deflector installed) on the pinion .
2 Install the immobilization wrench (2) on the flange (1).
3 Tighten the collar nut to specified torque.
4 Remove the immobilization wrench
5 Rest the assembly on two woodblocks so the pinion can be rotated
B35.30-0043-01
6 Install the dynamometer (3) with the socket (4) on the flange nut.
7 Manually rotate the flange (1) at least three complete turns, reading at the same time the friction moment with the dynamometer.
In used bearings, because the seating has already be completed, the friction moment can be smaller and, in new bearings where the seating will still occur, the friction moment can be greater.
In case the friction moment is greater or smaller than the specified value, disassemble again the pinion and install respectively a thicker or thinner compensating washer. This operation has to be repeated until obtaining the specified friction moment value.
8 Remove the flange again.