ar3530w047004b

Checking friction torque of tapered roller bearings

Type ar · topic 35.30 · version 0105 · 2006-06-30

Applies to: REAR AXLE 748.21 /22 /23 /24 /702 mit Durchtrieb

Where it sits

Function group 2 Chassis › 35 Rear axle › 35.30 Final drive, drive shafts

EinPAS 17 Drivetrain/axle › 17.51 Rear axle › 17.51.65 Rear axle differential/axle through-drive

Also applies to engines/gearboxes: 748 21*, 748 22*, 748 23*, 748 24*, 748 702

AR35.30-W-0470-04B

Checking friction torque of tapered roller bearings

Test and adjustment values for rear axle drive

Number

Designation

Rear axle 748.21/22/23/24 with ring gear 233 mm Ø

Rear axle 748.21/22/23/24 with ring gear 300 mm Ø

BE35.30-N-1003-01A

Friction torque of tapered roller bearings on drive pinion

Nm

2...3

2...3

Test and adjustment values for rear axle drive

Number

Designation

Rear axle 748.702/705
with ring gear 233 mm Ø

BE35.30-N-1003-01A

Friction torque of tapered roller bearings on drive pinion

Nm

2...3

Checking friction torque of tapered roller bearings
Checking friction torque of tapered roller bearings
Checking friction torque of tapered roller bearings

745 589 01 21 00

001 589 22 09 00

001 589 75 09 00

Torque wrench

Wrench socket

Impact-type box wrench

Checking friction torque of tapered roller bearings

W33.30-0042-01

1 Position torque wrench (2) with socket wrench bit (1) onto collar nut.

2 Continue to turn the countershaft gear (3) using the torque wrench (2) by at least three turns and read off the friction torque while doing so.

If the friction torque deviates from the adjustment value, a suitable shim must be fitted. A thinner shim increases the friction torque: a thicker one reduces the friction torque. The lower adjustment value should be used for tapered roller bearings that have been used and the upper adjustment value for new ones.