Remove/install rear axle brake disk

AR42.10-B-0240E

Remove/install rear axle brake disk

11.03.2020

Model

979 with rear axle 743.453/480

Model

979 with rear axle 743.453

1

Brake disc

2

Wheel hub

3

Bolt

 

Remove/install

1

Remove the wheels

AR40.10-B-1100E

2

Remove the brake pads

.

AR42.10-B-0170A

3

Remove the support with the brake caliper

Rear axles 743.480

AR42.10-B-0600D

Rear axles 743.453

AR42.10-B-0600E

4

Remove the wheel hub (2)

.

AR35.20-B-0310J

5

Remove the bolts (3) and the brake disc (1) from the wheel hub (2)

 .Disk retaining screw (guide)

*BA35.20-B-1003-06E



Check

6

Check the brake disc conditions

 The braking surfaces must be plain.
Slight grooves or scratches caused by the normal use do not compromise the brake efficiency.

 Deep grooves or scratches compromise the service life of the brake pads.
In this case, grind the disc.

 Before grinding the disc, check the possibility of removing material.

 Do not reuse discs in which the thickness has reached the minimum limit.

 After machining, redo the disc bevels on the outside.

Disk width

*BE42.10-B-1001-09A

Rotor outer nominal diameter

*BE42.10-B-1002-09A

Knocking (maximum lateral deviation). Measured 10 mm from outer rotor edge

*BE42.10-B-1003-09A

Rotor braking surface coarseness

*BE42.10-B-1004-09A

Disc outer edge chamfer, after machined

*BE42.10-B-1005-09A

Rotor braking surface parallelism

*BE42.10-B-1006-09A

7

Install in reverse order

 In the case of replacement by a new disc, remove the anti-corrosion protection from the friction surfaces.

 When assembling the disc in the hub, pay attention so that the support surfaces are perfectly clean and free from burrs.

Test values of brake discs of rear axle

Number

Designation

Rear axle 743.451/453

Rear axle 743.480

BE42.10-B-1001-09A

Disk width

New

mm

34

30

Minimum permissible thickness

mm

28

26

Test values of brake discs of rear axle

Number

Designation

Rear axle 743.451/453

Rear axle 743.480

BE42.10-B-1002-09A

Rotor outer nominal diameter

mm

335

324

Test values of brake discs of rear axle

Number

Designation

Rear axle 743.451/453

Rear axle 743.480

BE42.10-B-1003-09A

Knocking (maximum lateral deviation). Measured 10 mm from outer rotor edge

mm

0,10

0,10

Test values of brake discs of rear axle

Number

Designation

Rear axle 743.451/453

Rear axle 743.480

BE42.10-B-1004-09A

Rotor braking surface coarseness

Rz

-

-

Test values of brake discs of rear axle

Number

Designation

Rear axle 743.451/453

Rear axle 743.480

BE42.10-B-1005-09A

Disc outer edge chamfer, after machined

mm

3

-

Test values of brake discs of rear axle

Number

Designation

Rear axle 743.451/453

Rear axle 743.480

BE42.10-B-1006-09A

Rotor braking surface parallelism

mm

0,05

0,02

 Hub

Number

Designation

Axle 743.453

Axle 743.480

BA35.20-B-1003-06E

Disk retaining screw (guide)

M8x1.5

Nm

24

25