Remove/install hydraulic cylinder of 1st front axle

AR46.25-W-0101HE

Remove/install hydraulic cylinder of 1st front axle

12.02.2019

Model

963, 964 with front axle 739.5

with code C6L (Power-assisted steering, reinforced, from 9 t)

Shown on LHD vehicle

1

Bearing cap

2

Bolts

3

Torsion bar

Shown on LHD vehicle

4

Hydraulic hoses

5

Hydraulic cylinder

6

Tie rod

7

Clamp

8

Caps

Shown on LHD vehicle

5

Hydraulic cylinder

6

Tie rod

9

Nut

10

Nut

11

Steering knuckle arm

12

Bearing bracket

13

Nut

 Danger

Risk of death caused by vehicle slipping or toppling off during lifting

Only lift vehicle at the lift support points specified by the vehicle manufacturer.

AS00.00-Z-0032-01A

 Warning

Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning from swallowing hydraulic fluid.

Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

 Warning

Risk of injury from being trapped in the swivel range of steered axles

Ensure that no persons or objects are in the swivel range of all steered axles when turning the steering wheel. Do not stand in the swivel range of the additional steering axle when the engine is running.

AS46.00-Z-0002-01A

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

Topical note

Special instructions for lifting and supporting vehicle

AH00.60-N-0100-01B

Topical note

Notes on maintenance and repair work

AH46.20-N-0001-01H

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW



Remove

1

Move front wheels to straight-ahead position

2

Secure vehicle against rolling

3

Remove bearing caps (1) from bearing brackets of spring pads

4

Release bolts (2) and swivel torsion bar (3) downwards

5

Raise vehicle at front axle far enough so that wheels can turn freely, and jack up vehicle

 Jack up vehicle in such a way that the torsion bar (3) can be subsequently reinstalled with the vehicle jacked up.

6

Mark installation position of hydraulic hoses (4) relative to hydraulic cylinder (5)

7

Remove hydraulic hoses (4) from hydraulic cylinder (5)

 Collect escaping oil in a suitable container.
Plug openings.

 Plug

*963589019100

8

Remove bolt and nut of clamp (7)

9

Slide clamp (7) on tie rod (6) to one side

10

Remove caps (8)

If present.

11

Unscrew nut (9) for fastening tie rod (6) to steering control arm (11) and screw on again by hand


Screw in nut (9) up to safety collar.
This prevents the thread of the ball joint on the tie rod (6) from being damaged when removed.

 Counterhold the ball joint with an Allen wrench if necessary.

12

Pry off tie rod (6) from steering control arm (11)

 The tie rod (6) detaches suddenly.

 Puller

*625589003500

13

Position new bolt and nut at clamp (7)

14

Slide clamp (7) back to original position on tie rod (6) and tighten

 This ensures that the track width is not adjusted.

 Ball head clamp to steering arm and steering knuckle arm

*BA33.25-N-1004-01I

15

Unscrew nut (9) and remove tie rod (6) from steering control arm (11)

16

Unscrew nut (10) for fastening hydraulic cylinder (5) on steering control arm (11) and screw on again by hand


Screw in nut (10) up to safety collar.
This prevents the thread of the ball joint on the hydraulic cylinder (5) from being damaged when it is removed.

 Counterhold the ball joint with an Allen wrench if necessary.

17

Pry off hydraulic cylinder (5) from steering control arm (11)

 The hydraulic cylinder (5) is released suddenly.

 Puller

*625589003500

18

Unscrew nut (10) and remove hydraulic cylinder (5) from steering control arm (11)

19

Remove bearing bracket (12) from front axle and remove hydraulic cylinder (5) together with bearing bracket (12)

20

Unscrew nut (13) for fastening hydraulic cylinder (5) on bearing bracket (12) and screw on again by hand


Screw on the nut (13) as far as the safety collar.
This prevents the thread of the ball joint on the hydraulic cylinder (5) from being damaged when it is removed.

 Counterhold the ball joint with an Allen wrench if necessary.

21

Pry off hydraulic cylinder (5) from bearing bracket (12)

 The hydraulic cylinder (5) is released suddenly.

 Puller

*625589003500

22

Unscrew nut (13) and remove hydraulic cylinder (5) from bearing bracket (12)



Install

23

Attach tie rod (6) to steering knuckle arm (11)

 Nut to tie rod end and drag link end

*BA46.40-N-1001-06J

24

Install bearing bracket (12)

 Bolt/nut, bearing bracket of hydraulic cylinder of 1st front axle to front axle

*BA46.40-N-1012-06J

25

Install hydraulic cylinder (5)

 Nut, hydraulic cylinder of 1st front axle to bearing bracket

*BA46.40-N-1013-06J

 Nut, ball joint of hydraulic cylinder of 1st front axle to steering control arm

*BA46.40-N-1014-06J

26

Fit new caps (8)

If caps (8) were installed.

27

Remove all stop plugs

28

Mount hydraulic hoses (4) to hydraulic cylinder (5)

 Observe markings.

 Union nut, hydraulic hose to hydraulic cylinder of 1st front axle

*BA46.40-N-1016-06J

29

Swivel torsion bar (3) upwards and mount bearing caps (1) onto bearing brackets of spring pads

 Bearing cap of torsion bar to front axle bearing bracket

*BA32.35-N-1003-02H

30

Fully tighten bolts (2)

 Torsion bar at torsion bar linkage

*BA32.35-N-1004-02H

31

Fill up steering gear oil and bleed

AR46.25-W-3001H

32

Check hydraulic cylinder (5) in area of hydraulic hoses (4) for leak tightness

 Visual inspection.

33

Conduct a road test

 During the road test check the overall steering behavior of the vehicle.

 Front axle stabilizer bar

Number

Designation

Model 963, 964 with FA 739.5

BA32.35-N-1003-02H

Bearing cap of torsion bar to front axle bearing bracket

Nm

100

 Front axle stabilizer bar

Number

Designation

Model 963, 964 with FA 739.5

BA32.35-N-1004-02H

Torsion bar at torsion bar linkage

Stage 1

Nm

330

Stage 2

 °

90

 Axle housing, steering knuckle

Number

Designation

Front axle 739.5 in model 956, 963, 964

BA33.25-N-1004-01I

Ball head clamp to steering arm and steering knuckle arm

M12x1.5

Nm

80

M14x1.5

Nm

170

 Steering linkage

Number

Designation

Model 963, 964

BA46.40-N-1001-06J

Nut to tie rod end and drag link end

M141.5

Nm

90

M181.5

Nm

180

M201.5

Nm

230

M241.5

Nm

280

M271.5

Nm

340

 Steering linkage

Number

Designation

Model 963, 964

BA46.40-N-1012-06J

Bolt/nut, bearing bracket of hydraulic cylinder of 1st front axle to front axle

Nm

460

 Steering linkage

Number

Designation

Model 963, 964

BA46.40-N-1013-06J

Nut, hydraulic cylinder of 1st front axle to bearing bracket

Nm

225

 Steering linkage

Number

Designation

Model 963, 964

BA46.40-N-1014-06J

Nut, ball joint of hydraulic cylinder of 1st front axle to steering control arm

Nm

225

 Steering linkage

Number

Designation

Model 963, 964

BA46.40-N-1016-06J

Union nut, hydraulic hose to hydraulic cylinder of 1st front axle

Nm

50