Adjust gear backlash at differential assembly

AR35.30-B-0475XC

Adjust gear backlash at differential assembly

12.02.16



Adjust

Danger!

Risk of injuries due to parts with sharp corners or cutting edges

When performing works near or in the area where parts with sharp corners and not deburred edges, always wear protective gloves. Remove the burrs of the parts.

AS00.00-B-0017-01A

1

Support the magnetic support base (7) with the dial gauge (6) on a flat surface of the tapered group housing (1)

The dial gauge must have its end supported on the flank of one of the bevel gear tooth (8) with pre-load of approximately 2 mm.



*363589022100



*001589532100

2

Carry out the measurement of the clearance between the teeth of the bevel gear and drive pinion, at least in three points 120º far from each other

In the measurement, determine the smallest clearance point.

*BE35.31-B-1001-03C

3

Block the pinion in the smallest clearance point and displace the differential set in the axial direction actuating the threaded rings (3, 5) until you obtain a value 0.05 mm above the largest prescribed clearance

Make sure that the Allen lock bolts in the bearings had released totally the threaded rings.

The value above the largest prescribed clearance will be necessary to adjust the tapered roller bearings 2, 4 pre-load.



*055589100700



*055589090700

4

Unfasten the threaded rings (3, 5) to relief the load on the tapered roller bearings (2, 4), and then lean them again

Softly lean the threaded rings in order not to load the bearings.

5

Determine the central differential mounting dimension

AR35.30-B-0475-01XC

6

Adjust the pre-load of the tapered roller bearings

AR35.30-B-4302-01XC

7

Tighten the Allen lock bolts in the bearings

Pay attention to have the Allen lock bolts inserted in the cavities of the threaded rings, ensuring this way not to damage the threads.



Check

8

Turn the bevel gear (8) some times and check again the clearance between the bevel gear and drive pinion's teeth

If the nominal value is not reached, repeat the operations from the step 2 on.

9

Check the contact marks between the bevel gear and the drive pinion

AR35.30-B-0475-02XA

*BR00.45-B-1002-07A

Número

Denominação

Rear axles 743.4

BE35.31-B-1001-03C

Clearance between ring gear/pinion

mm

0.20...0.28

Número

Denominação

Número de pedido

BR00.45-B-1002-07A

Ink for contact (permanent violet color - Nr. 330)

Acrilex ref. 014123