Disassemble/assemble brake caliper on rear axle

AR42.10-G-0550CC

Disassemble/assemble brake caliper on rear axle

06.08.2020

Model

437.43/46 with rear axle 747.220/221

Modification notes

04.03.2013

Fit nut (13) finger-tight

Operation step 13

AR42.10-G-0550-02CC

04.03.2013

Further operation steps added

Operation steps 9 to 14

1

Shield

12

Lock washer

22

Needle bearing

2

Protective cap

13

Nut

23

Sealing ring (drive spindle)

3

Piston (57 mm dia.)

14

Actuating lever

24

Support ring

4

Piston (57 mm dia.)

15

Drive spindle

25

Sealing ring (hexagon nut for operating lever)

5

Screw plug

16

Compression spring

26

Pin

6

Reset shaft

17

Piston sealing ring

27

Sealing ring (adjusting spindle)

7

Flanged housing section

18

Sealing washer

28

Sealing ring (resetting shaft)

8

Screw sleeve

19

Retaining ring

29

Sealing ring (screw plug)

9

Hex nut (self-locking)

20

Support disk

S1

Clearance

10

Adjusting spindle

21

Sealing ring (operating lever)

S2

Clearance

11

Housing cover part

Shown with parking brake applied

13

Nut

31

Pin

Bild B

Nut (13) (tightened)

14

Actuating lever

Bild A

Nut (13) (fitted finger-tight)

Bild C

Installation position of operating lever (14) to pull rod (30)

30

Pull rod



Remove

 Caution

Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid

Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.

AS42.50-Z-0001-01A

1

Remove rear axle brake caliper

AR42.10-G-0080CC



Disassemble

2

Disassemble rear axle brake caliper

AR42.10-G-0550-01CC

Topical note

Notes on repairs to brake system

AH42.00-P-0003-01A

Topical note

Notes on direction of rotation for adjustment of clearance

AH42.10-N-0007-01C

 Observe direction of rotation of adjusting spindle (10) and reset shaft (6).

Spirit

*BR00.45-Z-1032-04A

 Resetting device

*000589524300

3

Disassemble second brake caliper on rear axle

Only with CODE X19 (Load rating II) or CODE X20 (Load rating III)

AR42.10-G-0525CC

 Brake caliper is same as on front axle.



Assemble

4

Assemble brake caliper on rear axle

AR42.10-G-0550-02CC

Topical note

Notes on direction of rotation for adjustment of clearance

AH42.10-N-0007-01C

 Observe direction of rotation of adjusting spindle (10) and reset shaft (6).

Long-life grease

*BR00.45-Z-1001-06A

 Screw plug (flange side)

*BA42.10-N-1002-12G

 Jam nut (cover side)

*BA42.10-N-1003-12G

 Threaded sleeve in flanged housing section

*BA42.10-N-1009-12G

 Mounting fixture

*000589004000

 Resetting device

*000589524300

 Interference fit washer

*000589534300

 Thrust piece

*000589554300

 Fitting attachment

*000589564300

 Basic drift

*406589041500

 Thrust piece

*427589004300

 Press-in tool

*427589014300

5

Assemble second brake caliper on rear axle

Only with CODE X19 (Load rating II) or CODE X20 (Load rating III)

AR42.10-G-0525CC

 Brake caliper is same as on front axle.



Install

6

Install rear axle brake caliper

AR42.10-G-0080CC

 Do not install rear wheel yet.

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

7

Let engine run and fill compressed air system

8

Turn off engine

 The compressed-air system must be filled.

9

Tighten nut (13)


When tightening the nut (13), the operating lever (14) must be counterheld.
Otherwise there could be stress between the operating lever (14) and the pull rod (30).

  When tightening with a torque wrench, the parking brake must be disengaged.
 When tightening without a torque wrench, the parking brake must be engaged.

 The nut (13) can also be tightened without the aid of a torque wrench; for this:
 Apply parking brake,
 Fit nut (13) finger-tight without tool
 Apply a marking to one edge of the nut (13) on the brake caliper (picture A).
 Tighten nut (13) a min. of 2 mm to a max. of 3 mm (picture B); while doing so, counterhold operating lever (14).

 Nut, operating lever to flanged housing section

*BA42.10-N-1007-12G

10

Release parking brake

11

Check installation position of operating lever (14) relative to pull rod (30) (picture C) of spring-loaded brake cylinder

 The bolt (31) must be unstressed or the operating lever (14) and the pull rod (30) must align centrally with one another (broken line in picture C).
If necessary, the nut (13) must be loosened, the installation position of the operating lever (14) repositioned, and the nut (13) retightened.

12

Apply parking brake

13

Remount the rear wheel

 Pressure plate nut

*BA40.10-N-1002-03C

14

Check brake system for leaks and proper function

 Disk wheels

Number

Designation

MODEL 437.43

Model 437.46

BA40.10-N-1002-03C

Pressure plate nut

M20x1.5

Nm

-

-

M22x1.5

Nm

600

600

 Rear axle brake caliper

Number

Designation

Model 437.43/46 with rear axle 747.220/221

BA42.10-N-1002-12G

Screw plug (flange side)

Nm

40

 Rear axle brake caliper

Number

Designation

Model 437.43/46 with rear axle 747.220/221

BA42.10-N-1003-12G

Jam nut (cover side)

Nm

40

 Rear axle brake caliper

Number

Designation

Model 437.43/46 with rear axle 747.220/221

BA42.10-N-1007-12G

Nut, operating lever to flanged housing section

Nm

230

 Rear axle brake caliper

Number

Designation

Model 437.43/46 with rear axle 747.220/221

BA42.10-N-1009-12G

Threaded sleeve in flanged housing section

Nm

30

Repair materials

Number

Designation

Order number

BR00.45-Z-1001-06A

Long-life grease

A 000 989 63 51 11

BR00.45-Z-1032-04A

Spirit

Use corresponding commercially available repair materials.