37 22 540 Replacing Air Supply Unit

37 22 540 Replace air supply unit





Warning!
Risk of injury!
Drain the air spring system before carrying out any work on the air supply unit, air pipes and air springs!
Danger of injury if this instruction is not complied with!
Risk of damage!
Extreme cleanliness must be ensured in the connection area of the pipes during removal and installation. Even the smallest of dirt particles can cause leakage in the air spring system.

Note:
Read and comply with notes on air spring system.

Necessary preliminary tasks:
^ Deactivate and empty air spring system
^ Remove right underbody panelling








Important!
Do not kink, twist or crush lines.





Open quick-connection couplings (1-3).

Disconnect quick-connect coupling (4) and seal both lines with adhesive tape.

Release banjo bolts (1, 2).

Lay pipes to one side and seal off with adhesive tape.





Installation:
Check banjo bolts for dirt, clean if necessary. Then carefully screw in banjo bolts by hand to avoid damaging the plastic threads and with it the air supply unit.

Tightening torque 37 12 1AZ.





Unscrew nuts (1).

Remove air supply unit (2).

Installation:
Replace self-locking nuts.

Tightening torque 37 22 1AZ.





After installation:
^ Activate and fill air suspension system