[Dmatz]

As mentioned before placing blocking under the Cisco before you work on your air system could be life and death. DO NOT OVERLOOK THIS STEP. Prevost recommended replacement if the norgen valves I assume thus is the six pack referred to every 10 years as well as the air bags and break chambers. I am not sure what Newell's recommendation is or what everyone has found for lifespan of these items. The advice was to change them in a shop vs being down on the side if the road. Air leaks can be tough to track down I do agree with the advice given here as well.