Check and adjust toe on rear axle

AR40.20-S-0332S

Check and adjust toe on rear axle

12.4.11



Checking

1

Adjust zero position of air suspension

Only with code (CL0) Rear lowerable/raisable air suspension

 Insert assembly device on the rear axle and lower vehicle until this abuts the assembly device. The zero position reached corresponds to an inclinometer angle of 0.82° at the rear axle.

 Assembly device

*639589022300

2

Measure vehicle level at front and rear axles with electronic inclinometer

 Use the measured vehicle level to look up the specified values for the toe-in on the table sheet and note down these values.

AR40.20-S-0302S

Toe at vehicle level

With CODE (ZG2) Permanent all-wheel drive

*BE40.20-N-1001-10F

*BE40.20-N-1002-10F

Without code (CL0) Rear lowerable/raisable air suspension, code (CF1) Short springs, code (ZG2) Permanent all-wheel drive

*BE40.20-N-1003-10F

*BE40.20-N-1007-10F

With code (CL0) Rear lowerable/raisable air suspension

*BE40.20-N-1004-10F

With code (CF1) Short springs

*BE40.20-N-1006-10F

*BE40.20-N-1007-10F

3

Perform wheel alignment check

 During the chassis alignment, the actual chassis data should be measured (independently of the vehicle level).

AR40.20-S-0200S

This data is measured according to the specifications of the axle alignment device manufacturer.

4

Check the toe adjustment on the right and left side of the vehicle

 Compare the toe-in values according to the vehicle level with the actual values measured during the chassis alignment.

Adjust

5

Adjust toe

 Replace cam bolt (1) and nut if not yet replaced during previous work. Raise respective axle half to replace cam bolt (1).

 Adjust toe-in to specified value using cam bolt (1) at bearing of left and right semi-trailing arm.

Permitted difference between right and left side of vehicle for rear-axle toe

*BE40.20-N-1008-10F



*BA35.15-N-1003-03D

Number

Designation

Model 639
without code
CL0, CF1, ZG2, XZ1

Model 639
with code CL0, without code XZ1

Model 639
with code CF1, without code XZ1

Model 639
with code ZG2, without code XZ1

BE40.20-N-1001-10F

Toe at vehicle level

+11.42°

-

-

-

-0° 15' (10')

+10.74°

-

-

-

-0° 13' (10')

+10.09°

-

-

-

-0° 11' (10')

+9.47°

-

-

-

-0° 10' (10')

+8.86°

-

-

-

-0° 08' (10')

+8.30°

-

-

-

-0° 07' (10')

+7.76°

-

-

-

-0° 05' (10')

+7.24°

-

-

-

-0° 04' (10')

+6.75°

-

-

-

-0° 02' (10')

+6.28°

-

-

-

-0° 01' (10')

+5.84°

-

-

-

+0° 01' (10')

+5.42°

-

-

-

+0° 02' (10')

BE40.20-N-1002-10F

Toe at vehicle level

+5.02°

-

-

-

+0° 04' (10')

+4.64°

-

-

-

+0° 05' (10')

+4.29°

-

-

-

+0° 06' (10')

+3.95°

-

-

-

+0° 07' (10')

+3.63°

-

-

-

+0° 08' (10')

+3.33°

-

-

-

+0° 10' (10')

+3.05°

-

-

-

+0° 11' (10')

+2.79°

-

-

-

+0° 11' (10')

+2.53°

-

-

-

+0° 13' (10')

+2.30°

-

-

-

+0° 13' (10')

+2.08°

-

-

-

+0° 14' (10')

+1.89°

-

-

-

+0° 15' (10')

BE40.20-N-1003-10F

Toe at vehicle level

+5.47°

-0° 15' (10')

-

-

-

+4.79°

-0° 13' (10')

-

-

-

+4.14°

-0° 11' (10')

-

-

-

+3.53°

-0° 10' (10')

-

-

-

+2.94°

-0° 08' (10')

-

-

-

+2.37°

-0° 06' (10')

-

-

-

+1.83°

-0° 05' (10')

-

-

-

+1.32°

-0° 03' (10')

-

-

-

+0.83°

-0° 02' (10')

-

-

-

+0.37°

+0° 00' (10')

-

-

-

-0.07°

+0° 01' (10')

-

-

-

-0.49°

+0° 03' (10')

-

-

-

BE40.20-N-1004-10F

Toe at vehicle level

+0.82 °

-

0° 18' (10')

-

-

BE40.20-N-1005-10F

Toe at vehicle level

-0.89°

+0° 04' (10')

-

-

-

-1.26°

+0° 05' (10')

-

-

-

-1.62°

+0° 07' (10')

-

-

-

-1.95°

+0° 08' (10')

-

-

-

-2.27°

+0° 09' (10')

-

-

-

-2.57°

+0° 10' (10')

-

-

-

-2.85°

+0° 11' (10')

-

-

-

-3.11°

+0° 12' (10')

-

-

-

-3.36°

+0° 13' (10')

-

-

-

-3.59°

+0° 14' (10')

-

-

-

-3.81°

+0° 14' (10')

-

-

-

-4.01°

+0° 15' (10')

-

-

-

BE40.20-N-1006-10F

Toe at vehicle level

+3.97°

-

-

-0° 11' (10')

+3.32°

-

-

-0° 09' (10')

+2.71°

-

-

-0° 07' (10')

+2.12°

-

-

-0° 05' (10')

+1.55°

-

-

-0° 04' (10')

+1.01°

-

-

-0° 02' (10')

+0.50°

-

-

-0° 01' (10')

+0.01°

-

-

+0° 01' (10')

-0.45°

-

-

+0° 02' (10')

-0.89°

-

-

+0° 04' (10')

-1.31°

-

-

+0° 05' (10')

-1.71°

-

-

+0° 07' (10')

BE40.20-N-1007-10F

Toe at vehicle level

-2.08°

-

-

+0° 08' (10')

-2.44°

-

-

+0° 10' (10')

-2.77°

-

-

+0° 11' (10')

-3.09°

-

-

+0° 12' (10')

-3.39°

-

-

+0° 13' (10')

-3.67°

-

-

+0° 14' (10')

-3.93°

-

-

+0° 15' (10')

-4.18°

-

-

+0° 16' (10')

-4.41°

-

-

+0° 17' (10')

-4.63°

-

-

+0° 18' (10')

-4.83°

-

-

+0° 19' (10')

BE40.20-N-1008-10F

Permitted difference between right and left side of vehicle for rear-axle toe

°

10'

10'

10'

10'

Number

Designation

Model
639.601/603/
605/701/703/
705/711/713
811/813/815

BA35.15-N-1003-03D

Nut of bolt, semi-trailing arm to substructure

Stage 1

Nm

160

Stage 2

°

120