Remove/install steering gear

AR46.20-W-0500EB

Remove/install steering gear

18.12.2019

Model

375.3, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5

HEMA steering HD900

Model

375.3, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5

SteeringRB8098

Model

375.3, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5

SteeringZF8098

Modification notes

18.12.2019

Work procedure completely revised.

Shown on vehicle with a steered front axle and HEMA HD900 steering

1

Steering gear

7

Screw

14

Oil reservoir

1.1

Primary shaft

8

Boot

15

Oil suction line

2

Nut

9

Universal joint

16

Oil pressure line

3

Pitman arm

10

Screw

A

Assembly slot

4

Nut

11

Nut

B

Mark

5

Drag link

12

Oil return line

C

Mark

6

Steering bracket

13

Bracket

 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

 Warning

Risk of injury caused by body parts being pinched or crushed as cab is tilted

Ensure that no one is within the tilting range of the cab as it is being tilted. Always tilt the cab all the way to the end position and secure it with the safety strut.

AS60.80-Z-0001-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Notes on maintenance and repair work

AH46.20-N-0001-01H

Topical note

Notes on tilting the cab

AH60.80-N-0003-01A

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

AH00.00-P-0015-01CW

Notes on safety-relevant components

AH00.00-Z-0019-01A

Assessment of steering after accidents

AH46.00-N-1000-01A



Remove

1

Fix holding device for loosening and tightening pitman arm (3) in place under a rear wheel on driver's side.

Only when replacing the steering gear (1) or pitman arm (3).

 To fix the vehicle in place, drive the corresponding rear wheel onto the holding device.

 Holding device

*964589004000

2.1

Turn steering full lock to the right.

Left-hand drive vehicle

2.2

Turn steering full lock to the left.

Right-hand drive vehicle

3

Open maintenance flap.

4

Tilt cab.

5

Loosen nut (2).

Only on model 375.30/32/35/37, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5


Do not remove nut (2). To pry off drag link (5), nut (2) must be screwed onto the thread of the ball joint at least up to the locking collar.
This prevents the thread of the ball joint on the drag link (5) from being damaged during removal.

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

6

Pry off drag link (5) from pitman arm (3).

Only on model 375.30/32/35/37, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5

 The drag link (5) detaches suddenly.

 Puller

*625589003500

7.1

Remove nut (2) and remove drag link (5) from pitman arm (3).

Model 375.30/32/35/37, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5

7.2

Remove drag link between steering gear and steering arm of 1st front axle.

Model 375.38

AR46.40-W-0101B

8

Remove drag link between steering gear and 1st steering idler arm.

Only on model 375.38

AR46.40-W-0102B

9

Detach boot (8) from steering gear (1) and slide upward.

10

Move steering gear (1) to center position.

HEMA steering HD900

AR46.20-W-0500-01EB

Steering RB8098, ZF8098

AR46.20-W-0500-01FB

 To do so, turn steering all the way to the left or right. While doing this, determine the number of turns on the steering shaft. Then turn the steering back by half the number of turns and align primary shaft (1.1) with steering gear (1) so that the marks (B and C) line up.

11

Secure steering wheel against turning.

 Fix the steering wheel in place on the support rod using e.g. cable ties. Before securing, make sure that the steering gear (1) is still at the center position.

12

Check marking (B) on primary shaft (1.1) relative to assembly slot (A) of lower universal joint (9).

If assembly slot (A) has moved,



Mark installation position of lower universal joint (9) relative to primary shaft (1.1).

13

Detach steering shaft with universal joint (9) from steering gear (1) and fasten at the side.

14

Detach oil pressure line (16) and oil return feed line (12) from steering gear (1).

 Counterhold corresponding fittings at steering gear (1).
Collect escaping oil in a suitable container.
Plug openings.

 Plug

*963589019100

15

Attach lifting belt to steering gear (1).


The lifting belt must be suitable for a load of at least 1000 kg and it must not make contact with sharp-edged objects.
Otherwise the lifting sling may tear and the steering gear (1) may be damaged.

16

Using suitable lifting gear, detach steering gear (1) from steering bracket (6) and place on floor or suitable tool cart.

 Box wrench

*765589010300

17

Remove pitman arm (3) from steering gear (1).

Only when replacing the steering gear (1) or pitman arm (3).

AR46.40-W-2000-01B

 The pitman arm (3) detaches suddenly when it is pulled off.

 Lifting device

*964589025900

 Holding device

*964589004000

 Spindle

*655589003502

 Bell-type puller

*964589003300



Install

18

Mount pitman arm (3) onto steering gear (1).

Only when replacing the steering gear (1) or pitman arm (3).

AR46.40-W-2000-01B

 Make sure that the pitman arm (3) is positioned correctly relative to the steering shaft.
Use new nut (4).

 SteeringZF8098Nut, steering gear pitman arm to steering gear

*BA46.20-N-1003-01J

 SteeringRB8098Nut, steering gear pitman arm to steering gear

*BA46.20-N-1003-01JB

 HEMA steering HD900Nut, steering gear pitman arm to steering gear

*BA46.20-N-1003-01JC

 Lifting device

*964589025900

 Holding device

*964589004000

19

Attach steering gear (1) to steering bracket (6).

 SteeringZF8098Bolt/nut, steering gear to steering bracket

*BA46.20-N-1001-01J

 SteeringRB8098Bolt/nut, steering gear to steering bracket

*BA46.20-N-1001-01JB

 HEMA steering HD900Bolt/nut, steering gear to steering bracket

*BA46.20-N-1001-01JC

 Box wrench

*765589010300

20

Detach lifting belt from steering gear (1).

21

Remove all stop plugs.

22

Install new fittings for oil return feed line (12) and oil pressure line (16) into steering gear (1).

Only when replacing the steering gear (1).

 On vehicles with an elbow fitting (steering RB8098, steeringZF80982nd generation, HEMA steering HD900), install an elbow fitting with test connection so that the hydraulic steering limiter can be adjusted later if required.
The elbow fitting can be ordered under part number A 004 997 20 71.

 SteeringZF8098Oil pressure line fitting to steering gear

*BA46.20-N-1013-01J

 SteeringZF8098Fitting for oil return line to steering gear

*BA46.20-N-1014-01J

 SteeringZF8098Elbow fitting, hose connection for return hose to steering gear

*BA46.20-N-1016-01J

 SteeringRB8098Oil pressure line fitting to steering gear

*BA46.20-N-1009-01JB

 SteeringRB8098Fitting for oil return line to steering gear

*BA46.20-N-1010-01JB

 SteeringRB8098Elbow fitting, hose connection for return hose to steering gear

*BA46.20-N-1012-01JB

 HEMA steering HD900Oil pressure line fitting to steering gear

*BA46.20-N-1009-01JC

 HEMA steering HD900Fitting for oil return line to steering gear

*BA46.20-N-1010-01JC

 HEMA steering HD900Elbow fitting, hose connection for return hose to steering gear

*BA46.20-N-1012-01JC

23

Attach oil pressure line (16) and oil return feed line (12) to steering gear (1).

 Counterhold corresponding fittings at steering gear (1).

 Union nut, steering gear oil line/hose

*BA46.25-N-1001-04B

24

Move steering gear (1) to center position.

HEMA steering HD900

AR46.20-W-0500-01EB

Steering RB8098, ZF8098

AR46.20-W-0500-01FB

 If necessary, turn primary shaft (1.1) all the way once to the left or right up to the end stop. Then turn primary shaft (1.1) all the way in the opposite direction and count the number of turns while doing so. Finally, turn primary shaft (1.1) back by half the number of turns and align with steering gear (1) so that the marks (B and C) line up.

 Adapter kit

*964589000900

25

Attach steering shaft with universal joint (9) to steering gear (1).

 The contact surface for the screw and nut at the lower universal joint (9) must be free of grease. Pay attention to installation position.

 Fit bolt/nut, universal/constant velocity joint

*BA46.10-N-1001-07B

26

Detach anti-twist lock from steering wheel.

27.1

Turn steering to right.

Left-hand drive vehicle

27.2

Turn the steering to the left.

Right-hand drive vehicle

28

Install drag link between steering gear and 1st steering idler arm.

Only on model 375.38

AR46.40-W-0102B

29.1

Attach drag link (5) to pitman arm (3).

Model 375.30/32/35/37, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5

 Use new nut (2).
Counterhold the ball joint with an Allen wrench if necessary.

 Nut, drag link to steering gear pitman arm

*BA46.40-N-1001-06P

29.2

Install drag link between steering gear and steering arm of 1st front axle.

Model 375.38

AR46.40-W-0101B

30

Attach boot (8) to steering gear (1).

31

Fill and bleed steering gear oil.

AR46.25-W-3001A

32

Check steering stops on both sides.

Only if steering gear (1) was replaced.

Model 950.5, 952.5 with front axle 730.108/109/114/115

AR33.25-W-0150A

Model 942.1, 943.1, 950.5, 952.5 with front axle 739.4, model 375.3, 940, 942.1, 943.1, 944, 950.5/6, 952.5/6, 953.6, 954.5 with front axle 739.5

AR33.25-W-0150B

If the steering stops have been changed,



Check hydraulic steering limiter, adjust if necessary.

AR46.20-W-1100B

 The hydraulic steering limiter is preset and may only be adjusted if the steering stops have been changed.

33

Conduct a road test.


When moving out of the workshop, pay attention to the holding device on the rear axle.
Otherwise the vehicle or the special tool may be damaged.

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

34

Checking power steering for leaks.

 Visual inspection.

 Steering wheel, steering column bracket, steering shaft

Number

Designation

Model 375.3/4, 940, 942, 943, 944, 950.5/6, 952.5/6, 953.6, 954.5, 958.2/4

BA46.10-N-1001-07B

Fit bolt/nut, universal/constant velocity joint

Nm

30

 Steering gear

Number

Designation

SteeringZF8098

BA46.20-N-1001-01J

Bolt/nut, steering gear to steering bracket

M20x1.5

Nm

460

 Steering gear

Number

Designation

SteeringRB8098

BA46.20-N-1001-01JB

Bolt/nut, steering gear to steering bracket

M20x1.5

Nm

460

 Steering gear

Number

Designation

HEMA steering HD900

BA46.20-N-1001-01JC

Bolt/nut, steering gear to steering bracket

M20x1.5

Nm

460

 Steering gear

Number

Designation

SteeringZF8098

BA46.20-N-1003-01J

Nut, steering gear pitman arm to steering gear

Nm

750

 Steering gear

Number

Designation

SteeringRB8098

BA46.20-N-1003-01JB

Nut, steering gear pitman arm to steering gear

Nm

750

 Steering gear

Number

Designation

HEMA steering HD900

BA46.20-N-1003-01JC

Nut, steering gear pitman arm to steering gear

Nm

750

 Steering gear

Number

Designation

SteeringRB8098

BA46.20-N-1009-01JB

Oil pressure line fitting to steering gear

Nm

60

 Steering gear

Number

Designation

HEMA steering HD900

BA46.20-N-1009-01JC

Oil pressure line fitting to steering gear

Nm

60

 Steering gear

Number

Designation

SteeringRB8098

BA46.20-N-1010-01JB

Fitting for oil return line to steering gear

Nm

60

 Steering gear

Number

Designation

HEMA steering HD900

BA46.20-N-1010-01JC

Fitting for oil return line to steering gear

Nm

60

 Steering gear

Number

Designation

SteeringRB8098

BA46.20-N-1012-01JB

Elbow fitting, hose connection for return hose to steering gear

Nm

90

 Steering gear

Number

Designation

HEMA steering HD900

BA46.20-N-1012-01JC

Elbow fitting, hose connection for return hose to steering gear

Nm

90

 Steering gear

Number

Designation

SteeringZF8098

BA46.20-N-1013-01J

Oil pressure line fitting to steering gear

Nm

60

 Steering gear

Number

Designation

SteeringZF8098

BA46.20-N-1014-01J

Fitting for oil return line to steering gear

Nm

60

 Steering gear

Number

Designation

SteeringZF8098

BA46.20-N-1016-01J

Elbow fitting, hose connection for return hose to steering gear

Nm

90

 Hydraulic power steering

Number

Designation

Model 375.3/4, 940, 942, 943, 944, 950.5/6, 952.5/6, 953.6, 954.5, 958.2/4

BA46.25-N-1001-04B

Union nut, steering gear oil line/hose

Line Ø 12 mm

Nm

50

Line Ø 15 mm

Nm

60

 Steering linkage

Number

Designation

Model 375.3/4, 940, 942, 943, 944, 950.5/6, 952.5/6, 953.6, 954.5, 958.2/4

BA46.40-N-1001-06P

Nut, drag link to steering gear pitman arm

M14x1.5

Nm

95

M18x1.5

Nm

180

M20x1.5

Nm

230

M24x1.5

Nm

285

M27x1.5

Nm

340