Solenoid Valve Block and Drive Pack

SOLENOID VALVE BLOCK AND DRIVE PACK

WARNING: The system is pressurized up to 10 bar. Dirt or grease must not enter the system. Wear hand, ear and eye safety standard protection when servicing system.

Remove

Petrol Vehicles Only:
1. Disconnect vacuum dump hose from 'T' piece on cruise control actuator.






2. Remove 2 screws securing actuator bracket to air supply unit. Move actuator aside.

All Models:
3. Depressurize system, refer to Air Suspension/Testing and Inspection/Procedures Testing and Inspection
4. Remove air compressor, refer to Compressor/Pump (Level Control)/Service and Repair Service and Repair






5. Disconnect all air pipes. Remove exhaust silencer from valve block.
6. Seal exposed air hoses and valve block
7. Release harness from 2 clips inside air supply unit. Disconnect multiplug from valve block, move harness aside.
8. Release valve block multiplug and clips from unit.
9. Remove 3 screws, remove valve block from unit.

Pressure Switch






10. Disconnect pressure switch multiplug.
11. Remove pressure switch.
12. Seal switch and valve block.

Drive Pack






13. Remove 4 screws securing drive pack to valve block.
14. Disconnect 2 drive pack multiplugs, remove drive pack.

Valve Block

15. Remove compressor hose from valve block.
16. Seal exposed hose and valve block.
17. Remove rear support bracket from multiplug.

Air Supply Unit






18. Remove 4 bolts securing air supply unit, remove unit.

Refit

19. Fit air supply unit, fit and tighten bolts.
20. Remove seals from compressor hose and valve block. Clean end of hose, fit hose to valve block and tighten union nut.
21. Position drive pack to valve block, connect multiplugs.
22. Align drive pack to valve block. Fit support brackets, fit and tighten Allen screws.
23. Remove seals from pressure switch and valve block.
24. Clean pressure switch, apply LOCTITE 572 to thread of switch. Fit switch to valve block. Tighten to 23 Nm (17 ft. lbs.).
25. Connect pressure switch leads to multiplug.
26. Fit valve block and drive pack assembly to air supply unit. Secure with bolts.
27. Secure valve block multiplug to case, fit harness clip.
28. Remove all seals from valve block and pipes. Clean pipe ends, connect pipes to valve block.
29. Fit exhaust silencer to valve block with new O-ring.

CAUTION: New exhaust silencers are supplied with a protective sleeve, which must be removed and discarded prior to fitting the silencer.

30. Reposition harness to valve block and unit, ensuring valve block multiplug passes under compressor multiplug. Connect multiplugs, secure harness to clips.
31. Fit compressor, refer to Compressor/Pump (Level Control)/Service and Repair Service and Repair

Petrol Models Only:

32. Reposition cruise control actuator. Fit and tighten screws.
33. Connect servo vacuum dump hose to 'T' piece.

All models:

34. Leak test connections, refer to Air Suspension/Testing and Inspection/Procedures Testing and Inspection