Remove/install spring control arm

AR35.20-P-0119RFW

Remove/install spring control arm

28.11.2018

Model

253.992/993

Shown on right side of vehicle

1

Spring control arm

6

Rear axle carrier

2

Nut

7

Elastomer bearing

3

Nut

8

Wheel carrier

4

Nut

9

Supporting joint

5

Screw

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

 Danger

Risk of explosion caused by escaping hydrogen or overheating of the fuel tanks when working on the hydrogen system. Risk of frostbite to body parts caused by escaping gas and by touching component parts carrying gas when emptying fuel tanks. Risk of asphyxiation caused by inhalation of air diluted by hydrogen. Risk of burn injuries by coming into contact with an invisible pale blue hydrogen flame.

AS00.00-Z-0030-01B

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

Topical note

Notes on fuel cell system

AH00.00-P-0022-01RFW

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Notes on handling, transport and storage of composite brake disks

AH42.10-P-9406-12LF

Topical note

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

AH00.00-P-0020-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

Notes on repair work on suspension components

AH00.00-P-0100-01A

 

Remove/install

1

Ensure that the requirements for driving into the workshop are fulfilled.

Topical note

Requirements for driving into the workshop

AH00.00-P-0021-01RFW

2

Print out "tank system, fuel cell, form event log," fill out, and attach to the vehicle somewhere clearly visible.



OF00.00-P-3000-21RFW

3

Remove air spring.

AR32.22-P-1500RFW

4

Unscrew nut (4) and remove screw from torsion bar linkage out of spring link (1).

 Installation: Replace nut (4) and screw from torsion bar linkage.

 Nut, torsion bar linkage to spring control arm

*BA32.20-P-1003-04T

5

Unscrew nut (3) and pull screw of shock absorber out of spring link (1).

 Installation: Replace nut (3) and screw of shock absorber.

 Self-locking nut, shock absorber to spring control arm

*BA32.25-P-1001-03P

6

Unscrew nut and pull screw (5) out of spring link (1).

 Installation: Replace screw (5) and accompanying nut.

 Bolt, spring control arm to wheel carrier

*BA35.20-P-1002-01I

7

Unscrew nut (2) and pull screw of spring link out of rear axle carrier (6).

 Installation: Replace nut (2) and screw of spring link.

 Use  the screwdriver bit, if a bolt with a multi-point socket is installed.

 Bolt, spring control arm to rear axle carrier

*BA35.20-P-1001-01I

 Screwdriver bit

*119589001000

8

Remove spring link (1).



Check

9

Check elastomer bearing (7) in rear axle carrier (6) for condition and damage.

If problems exist,



Replace elastomer bearing (7).

10

Check supporting joint (9) in wheel carrier (8) for condition and damage.

If problems exist,



Replace supporting joint (9).

AR35.20-P-0116LW

11

Install in the reverse order.

12

Perform chassis alignment.

AR40.20-P-0200LW

 Rear axle torsion bar

Number

Designation

Model 253 (except 253.388/389/988/989)
except code 489 (AIR BODY CONTROL)

Model 253 (except 253.388/389/988/989)
with code 489 (AIR BODY CONTROL)

BA32.20-P-1003-04T

Nut, torsion bar linkage to spring control arm

Stage 1

Nm

20

35

Stage 2

°

180

120

 Rear axle shock absorber

Number

Designation

Model 253

BA32.25-P-1001-03P

Self-locking nut, shock absorber to spring control arm

Air suspension

Stage 1

Nm

100

Stage 2

°

90

Steel suspension

Stage 1

Nm

45

Stage 2

°

90

 Spring control arm

Number

Designation

Model 253

BA35.20-P-1001-01I

Bolt, spring control arm to rear axle carrier

Stage 1

Nm

80

Stage 2

°

90

 Spring control arm

Number

Designation

Model 253

BA35.20-P-1002-01I

Bolt, spring control arm to wheel carrier

Stage 1

Nm

80

Stage 2

°

90