Remove/install steering knuckle

AR33.25-I-0400A

Remove/install steering knuckle

9.12.09

 

Remove/install

1

Remove front wheel hub

AR33.20-I-0310A

Danger!

Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes.

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

2

Remove wheel brake cylinder and brake shoes

AR42.10-I-0167B

3

Detach tie rod (7) from upright to be removed

AR46.40-I-0200A



*601589043300

4

Take off brake carrier plate (8)

 Remove cotter pin and knock out mounting bolt.

 Installation: Replace cotter pin.

*BA33.20-N-1002-01K

5

Remove steering arm (9)

 Check the steering arm for cracks or bending. If necessary, insert steering arm.

*BA33.20-N-1001-01K

6

Remove lubricating nipple (11), adapter and brake line bracket

 Installation: Grease upright using suitable lubricant at both positions.

7

Remove caps (10) with sealing ring from kingpin

 The caps are secured using Seeger circlip rings.

8

Remove retaining bolt (12) of steering knuckle pin

 The bolt is secured by a locknut.

 Installation: Tighten jam nut and once again: 

Check end play of steering knuckle and adjust if necessary

AR33.25-I-0400-04A



*001589532100



*363589022100

*BE33.25-N-1002-01F

*BE33.25-N-1003-01F

9

Push out kingpin (13)

 Use a special tool with a hydraulic vehicle jack.

Use a suitable punch to push out the kingpin.

 Installation: Press in the steering knuckle pin sufficiently until the groove is aligned with the hole of the retaining bolt (12).

Forcing-off device

*321589123300

10

Remove steering knuckle, adjusting washer (arrow) and thrust bearing

 Installation: Install pressure bearing and adjusting disk together firstly between the axle beam end underside and the upright, and center with the aid of a suitable punch.

Then: 

Check end play of steering knuckle and adjust if necessary

AR33.25-I-0400-04A



*001589532100



*363589022100

*BE33.25-N-1002-01F

*BE33.25-N-1003-01F

11

Press out bearing bushings of steering knuckle



Checking



The diameter of the individual components must always lie below the same normal or repair stage.

If a component's diameter is outside a normal or a repair stage compared with other components, then the component - if permissible - must be post-worked or replaced.

12

Inspect steering knuckle

It is not permitted in any way to re-work the steering knuckle.

AR33.25-I-0500A

13

Install bushings into upright

 Always use new bearing bushings.

*BE33.25-N-1008-01F

14

Measure outside diameter of kingpin

 Note the measured value.

*BE33.20-N-1002-01F

*BE33.20-N-1003-01F

15

Measure inner diameter of the bearing bushings in the steering knuckle

 Compare the measured dimension with the outside diameter of the kingpin.

If necessary:

Widen the bearing bushings by reaming to a dimension which is within the same standard or repair size as the dimension of the steering knuckle pin.

*BE33.20-N-1004-01F

*BE33.20-N-1005-01F

16

Measure the inside diameter of the kingpin bore in the front axle beam

 Compare the measured dimension with the diameter of the kingpin.

If necessary:

Ream the kingpin bore in the axle beam end to a size that lies in the same normal or repair stage as that for the steering knuckle pin.

*BE33.20-N-1006-01F

*BE33.20-N-1007-01F

17

Check pressure bearing

 If the pressure bearing exhibits signs of damage or traces of wear, it has to be replaced.

 If the kingpin is replaced, a new pressure bearing must be installed that matches the diameter of the kingpin.

*BE33.20-N-1002-01F

*BE33.20-N-1003-01F

18

Install in the reverse order

Number

Designation

Front axle 733.561/562/568

BE33.20-N-1002-01F

Outside diameter of kingpin

Normal

mm

30.037...30.028

Normal 1

mm

30.305...30.295

BE33.20-N-1003-01F

Outer  of kingpin

Repair stage

mm

30.645...30.634

Repair stage 1

mm

31.006...30.995

BE33.20-N-1004-01F

Inner  of kingpin bushing installed in upright

Normal

mm

30.098...30.065

Normal 1

mm

30.364...30.325

BE33.20-N-1005-01F

Inner  of kingpin bushing installed in upright

Repair stage

mm

30.697...30.658

Repair stage 1

mm

31.064...31.025

BE33.20-N-1006-01F

Inside  of kingpin hole in front axle beam

Normal

mm

30.021...30.000

Normal 1

mm

30.292...30.267

BE33.20-N-1007-01F

Inside  of kingpin hole in front axle beam

Repair stage

mm

30.625...30.600

Repair stage 1

mm

30.992...30.967

Number

Designation

Front axle 733.562

BE33.25-N-1002-01F

End play of steering knuckle at axle beam end

mm

0.025...0.100

BE33.25-N-1003-01F

Adjusting disks for upright axial play

mm

0.8...1.7

BE33.25-N-1008-01F

Depth of bearing bushing in relation to inner steering knuckle surface

mm

0.025

Number

Designation

Front axle 733.562

BA33.20-N-1001-01K

Castle nut for steering-arm attachment

M16

Nm

180

BA33.20-N-1002-01K

Bolt, brake anchor plate to upright

M12

Nm

195