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davidbrady · (This post was last modified: 03-22-2019 13:45 by davidbrady.)

(03-22-2019 13:10)cubeman Wrote: I did see one of those in the front of the coach , and you say that locks in the pressure to either the brakes or air springs ?

Yes I did do a brake check and to be honest I need to do them more often .

thank you for the drawling , makes it much easier to follow and locate .

where the drawing shows expansion air tanks I assume you meant air springs to those 6

Yes, the PR-2 at the accessory tank protects brake pressure from leaks in your suspension or accessories, and the one mounted upfront at the level-lo manifold protects suspension pressure from leaks in your accessories. Not saying you have problems with your PR-2's just pointing out some of the components and complexities. When you park, the norgren valves controlling your suspension lock the air in your airbags - the coach should stay upright and level for months. This isn't the job of the PR-2's. You can have all sorts of leaks at the manifolds and PR-2's and your suspension should stay upright. BTW, all the pics I've given you came out of your Mantenance and Parts Manuals for your coach VIN available on Prevost publications.

Issues with air leaks is why PC advocates "zeroing out" a bus upon purchase. They especially like it if you zero-out at Jeff's place in Vanore Tn, "East Tennessee Luxury Coach". One can only guess why! LOL! I don't like throwing away good parts so I'm not a fan of their philosophy, but when a coach leans to one side (not yours) or if you're paying an hourly rate to chase leaks, sometimes it's cheaper to just go in there an wholesale swap out old norgren valves. Sometimes the parts involved are cheaper than the labor when chasing leaks.

The 6 "expansion tanks" at the drive/tag are actually tanks. Some call them ping tanks. They make your air springs look bigger which gives a better ride. There's also two up front for you two IFS air springs.

Oh, another common leak is the pressure regulator and associated connections for the S60 fan tensioning bellows.