Check steering angle and steering torque sensor

SM46.25-W-0022A

Check steering angle and steering torque sensor

01.03.2018

Model

964.03/23/33

with code C6H (Steering, Servotwin, 4-axle)

Operation no. of the operation texts or standard texts and flat rates

Category

Op. no.

Operation text

Time

Acc. no.

Code

N

028856

Clean steering gear and surrounding area

ZM

46 901 83

LENKW-SENS

N

028854

Check steering angle and steering torque sensor

0,9 h

46 901 83

LENKW-SENS

1

Cab mounting console

5

Electromechanical control unit

9

Bolts

2

Steering shaft bearing bracket

6

Plastic ring

A73

Electrohydraulic P/S (APS) control unit

3

Universal joint

7

Seal

A77

Steering angle and steering torque sensor

4

Lower steering shaft

8

Electrical connector

Gear (12) of rotation angle and steering-wheel torque sensor (A77) properly welded together

5

Electromechanical control unit

11

Inspection mirror

A77

Steering angle and steering torque sensor

10

Sealing ring

12

Gear

Pfeil A

Weld seam

Gear (12) of steering angle and steering-wheel torque sensor (A77) not properly welded

12

Gear

Pfeil B

Welding pin

 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 with the safety strut.

AS60.80-Z-0001-01A

Topical note

Notes on maintenance and repair work

AH46.20-N-0001-01H

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Notes on tilting the cab

AH60.80-N-0003-01A



Remove

1

Thoroughly clean area all around the steering gear


Dirt particles and moisture may not enter the electromechanical controller unit (5) or the steering angle and steering-wheel torque sensor (A77).
The steering angle and steering-wheel torque sensor (A77) can be damaged by moisture and dirt, which in turn can alter the steering ability.

2

Open maintenance flap

3

Turn steering gear to center position



AR46.20-W-0500-01HE

4

Open window in driver door

5

Switch off ignition

6

Tilt cab

7

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 is at the center position.

8

Detach bracket for steering shaft bearing (2) from cab mounting console (1)

9

Mark installation position of universal joint (3) relative to steering gear

10

Detach universal joint (3) from steering gear and fasten lower steering shaft (4) together with bracket for steering shaft bearing (2) the upper steering shaft to one side

11

Detach vinyl ring (6) from electromechanical controller unit (5)

12

Detach seal (7) from electromechanical controller unit (5)

13

Detach electrical connection (8) of steering angle and steering-wheel torque sensor (A77) from electrohydraulic power steering (APS) control unit (A73)

14

Remove bolts (9) of steering angle and steering-wheel torque sensor (A77)

15

Detach steering angle and steering-wheel torque sensor (A77) using a suitable tool from the electromechanical controller unit (5) and carefully place to one side


Make sure that the sealing ring (10) is not damaged.
This ensures that moisture does not enter the steering angle and steering-wheel torque sensor (A77) and damage it.



Check

16

Use an endoscope or a commercially available inspection mirror (11) to check whether the gear (12) of the steering angle and steering-wheel torque sensor (A77) is properly welded together

 The gear (12) is properly weld where welding pins (arrows B) are not present, but rather a weld seam (arrow A).

If the gear (12) has been properly welded together or if the weld seam (arrow A) is visible.



Continue with operation step 17.

If welding pins (arrows B) are visible.



Mount steering angle and steering-wheel torque sensor (A77) and replace steering gear.



AR46.20-W-0500HE

 With regard to return shipment or scrapping of removed parts, please observe the information in your warranty system.



Install

17

Mount steering angle and steering-wheel torque sensor (A77) onto electromechanical controller unit (5)


Make sure that the sealing ring (10) is correctly mounted into the groove.
This ensures that moisture does not enter the steering angle and steering-wheel torque sensor (A77) and damage it.

 Bolt, rotation angle and steering-wheel torque sensor to electromechanical controller unit

*BA46.25-N-1003-03A

18

Connect electrical connection (8) of steering angle and steering-wheel torque sensor (A77) to electrohydraulic power steering (APS) control unit (A73)

19

Apply grease to area surrounding primary shaft on electromechanical controller unit (5)

 Use grease from parts kit.

20

Install new seal (7)

21

Apply grease between seal (7) and primary shaft on electromechanical controller unit (5)

 Use grease from parts kit.

22

Install new vinyl ring (6) using assembly drift

 Use assembly drift from parts kit.
Before installation, align toothing on the vinyl ring (6) with toothing on primary shaft. Then drive in the vinyl ring (6) using the assembly drift up to the groove for the fit bolt.
Align vinyl ring (6) level with the groove so that its toothing lines up with the toothing on the primary shaft, and the marking on the vinyl ring (6) lines up with the electromechanical controller unit (5).
After this, drive in the vinyl ring (6) up to the end stop using the assembly drift.

23

Mount universal joint (3) to steering gear

 Observe markings.

 Fit bolt/nut, universal/constant velocity joint

*BA46.10-N-1001-07B

24

Mount bracket for steering shaft bearing (2) onto cab mounting console (1)

 Steering shaft bearing bracket to cab mounting bracket

*BA46.10-N-1008-07B

25

Protect bolt heads of bolts (9) with paint against corrosion

26

Lower cab

27

Close maintenance flap

 Steering wheel, steering column bracket, steering shaft

Number

Designation

Model 963, 964

BA46.10-N-1001-07B

Fit bolt/nut, universal/constant velocity joint

Nm

30

 Steering wheel, steering column bracket, steering shaft

Number

Designation

Model 963, 964

BA46.10-N-1008-07B

Steering shaft bearing bracket to cab mounting bracket

Nm

25

 Electrohydraulic power steering

Number

Designation

Model 964.03/23/33 with code C6H

BA46.25-N-1003-03A

Bolt, rotation angle and steering-wheel torque sensor to electromechanical controller unit

Nm

30

Parts ordering note

Part no.

Designation

Quantity

A 960 540 09 17 05

Steering angle and steering torque sensor parts kit

1

A 381 990 01 14

Bolt (steering shaft to electromechanical controller unit)

1

N 910113 008001

Nut (steering shaft to electromechanical controller unit)

1