Remove/install 3/2-way valve for liftable leading axle

AR35.50-W-0026HT

Remove/install 3/2-way valve for liftable leading axle

13.05.2019

Rear axle

749.114 in model 964.043

1

Compressed-air connector

2

Electrical connector

Y79

3/2-way valve for raisable leading axle

 Danger

Risk of death from lowering vehicle when working between wheels and body. Risk of injury from pinching or crushing when working on the air suspension.

Testing and repair work between the wheel and wheel arch or in the wheel well should only be performed if the vehicle is secured using suitable support fixtures to prevent it from lowering.
Adjustment operations should only be performed from underneath the vehicle.
Use only suitable support fixtures to secure the vehicle frame or vehicle axles in order to prevent them from lowering.
If necessary, additionally use suitable support fixtures in order to prevent other moving vehicle parts that are in the working area from lowering, or use suitable retaining devices to prevent these parts from moving suddenly and without warning.
Secure areas with moving vehicle parts against unauthorized access.

AS32.22-Z-0001-01A

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A



Remove

1

Secure vehicle to prevent it moving away.

2

Support leading axle.

Only if leading axle is raised.

3

Drain compressed air system completely.

4

Remove compressed-air connector (1).

AR42.10-W-0900H

5

Disconnect electrical connection (2).

6

Unscrew 3/2-way valve for liftable leading axle (Y79) from holder.



Install

7

Screw 3/2-way valve for liftable leading axle (Y79) onto holder.

 3/2-way valve for liftable leading axle to bracket

*BA35.50-N-1003-02T

8

Connect electrical connection (2).

9

Attach compressed-air connector (1).

AR42.10-W-0900H



Check

10

Start the engine and completely fill compressed-air system at idle speed.

11

Switch off ignition.

12

Check compressed-air connector (1) for leak tightness.

 Use commercially available leak detector spray.

13

Remove support of leading axle.

Only if leading axle was supported.

 Leading axle

Number

Designation

Rear axle 749.114 in model 963.042, 964.043

BA35.50-N-1003-02T

3/2-way valve for liftable leading axle to bracket

Nm

3,5