Remove/install rear axle spring

AR32.21-D-0232A

Remove/install rear axle spring

17.08.2018

Model

906

with code C83 (Rear axle springs for increased payload)

Modification notes

16.01.2017

Spring U-bolt on rear axle spring to rear axle

BA32.21-N-1004-01A

16.08.2018

Bolt, rear axle spring to spring shackle at rear

BA32.21-N-1002-01A

Shown on left rear axle spring (3) with code CW2 (Discontinuation of vehicle lowering)

1

Spring U-bolt

2

Plate

3

Rear axle spring

4

Spring shackle

5

Bolts

6

Spring seat

9

Articulated rod

3

Rear axle spring

Pfeil

Mark

 Warning

Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under tension

Use only approved tensioning devices; additionally screen off hazardous area if necessary. Check special tools for damage and proper operation (visual inspection). Wear protective gloves.

AS00.00-Z-0001-01A

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Notes on evaluating rear axle springs

AH32.21-D-0002-01A

Notes on repair work on suspension components

AH00.00-P-0100-01A



Remove

1

Secure vehicle on vehicle lift

AR00.60-D-0100H

2

Support rear axle using an assembly unit mount and mounting plate



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B



000 588 10 62 00 Support plate

WS26.00-P-3309B

3

Unclip ball head of articulated rod(9) from relay lever of headlamp range adjustment level sensor

Model 906
with code C83 (Rear axle springs for increased payload)
with code LG0 (Bi-xenon headlamps)
Model 906
with code C83 (Rear axle springs for increased payload)
with code LG1 (Bi-xenon headlamps with cornering function)

4

Remove spring U-bolts (1)

5

Remove plate (2)

6

Detach rear axle spring(3) from front spring bracket

7

Remove rear axle spring(3) with spring shackle(4) from rear spring bracket

8

Lower rear axle and remove rear axle spring(3)



000 588 10 62 00 Support plate

WS26.00-P-3309B



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B


Lower the rear axle carefully and do not pull or kink the brake hoses.
Otherwise the brake hoses will be damaged.

 Helper required.

9

Remove spring seat (6)

Model 906
with code C83 (Rear axle springs for increased payload)
with code CW2 (Deletion, vehicle lowering)

10

Detach spring shackle(4) from rear axle spring(3)

11

Check elastomer bearings in rear axle spring(3) and spring shackle(4) for wear and damage

In event of wear or damage



Replace the elastomer bearings of the rear axle spring(3).

AR32.20-D-0240H



Install

12

Attach spring shackle(4) to rear bearing eye of rear axle spring(3) and adjust installed dimension of rear axle spring(3)

AR32.21-D-0232-01A

Installed dimension

*BE32.21-N-1001-01A

 Bolt, rear axle spring to spring shackle at rear

*BA32.21-N-1002-01A

13

Attach rear axle spring(3) to front spring bracket


Tighten the threaded connection finger-tight only.
Otherwise the elastomer bearings will be placed under stress.

 Make sure that the installation position of the rear axle spring(3) is correct. The mark (arrow) must point forward.

14

Attach rear axle spring(3) to rear spring bracket using spring shackle(4)


Tighten the threaded connection finger-tight only.
Otherwise the elastomer bearings will be placed under stress.

15

Position spring seat (6)

Model 906
with code C83 (Rear axle springs for increased payload)
with code CW2 (Deletion, vehicle lowering)

16

Raise rear axle carefully and insert center bolt of rear axle spring(3) into mounting hole of rear axle



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B



000 588 10 62 00 Support plate

WS26.00-P-3309B

17

Place plate(2)

18

Mount spring U-bolts (1)

 Nut/clamping sleeve, spring U-bolt for rear axle spring to rear axle

*BA32.21-N-1004-01A

19

Clip in ball head of articulated rod(9) at relay lever of headlamp range adjustment level sensor

Model 906
with code C83 (Rear axle springs for increased payload)
with code LG0 (Bi-xenon headlamps)
Model 906
with code C83 (Rear axle springs for increased payload)
with code LG1 (Bi-xenon headlamps with cornering function)

20

Lower vehicle, remove tensioning straps and lower vehicle lift fully

21

Tighten nuts of screws/bolts (5)


The nuts of screws/bolts (5) should only be tightened on rear axle spring (3) with suspension compressed.
Otherwise the elastomer bearings will be placed under stress and will wear prematurely.

 Bolt, rear axle spring to spring bracket at front

*BA32.21-N-1001-01A

 Bolt, spring shackle to spring bracket at rear

*BA32.21-N-1003-01A

Rear axle spring

Number

Designation

Model 906.11/13/21/23/61/63/71/73 with code C83

Model 906.15/25/65 with code C83

BE32.21-N-1001-01A

Installed dimension

with spring shackle

mm

1469

1467,5

 Rear axle spring

Number

Designation

Model 906.1/2 with code C83

Model 906.6/7 with code C83

BA32.21-N-1001-01A

Bolt, rear axle spring to spring bracket at front

M12x1.5

Stage 1

Nm

60

70

Stage 2

°

180

180

M16x1.5

Nm

240

240

 Rear axle spring

Number

Designation

Model 906.1/2 with code C83

Model 906.6/7 with code C83

BA32.21-N-1002-01A

Bolt, rear axle spring to spring shackle at rear

M12x1.5

Nm

85

85

M16x1.5

Nm

240

240

 Rear axle spring

Number

Designation

Model 906.1/2 with code C83

Model 906.6/7 with code C83

BA32.21-N-1003-01A

Bolt, spring shackle to spring bracket at rear

M12x1.5

Stage 1

Nm

70

70

Stage 2

°

180

180

M16x1.5

Nm

240

240

 Rear axle spring

Number

Designation

Model 906.1/2 with code C83

Model 906.6/7 with code C83

BA32.21-N-1004-01A

Nut/clamping sleeve, spring U-bolt for rear axle spring to rear axle

M12x1.5

Stage 1

Nm

-

-

Stage 2

°

-

-

M14x1.5

Stage 1

Nm

150

150

Stage 2

°

90

90