Residual Pressure Retaining Valve

Residual Pressure Retaining Valve
Residual pressure valve my only be replaced if:

^ It was damaged during removal, installation or repair of air spring damper,
^ Residual pressure retaining valve stuck,
^ Gasket is faulty.

If residual pressure retaining valve sticks, the vehicle must be on a hoist and the wheels must rotate freely in order to replace the valve. Wheels must not be compressed with empty boot under any circumstances!