Scenic Repairs

[tuccitown]

As I work through my list of items to make the Scenic road worthy and usable for the summer. First item I'd like to get to is the air systems both brake and suspension. I hear air leaks but no  major leaks that would prevent the rear of the coach to not air. Da book shows that the rear axles are supplied from the auxiliary tank, the front is airing fine so I would assume that the aux tank is getting air.

Any ideas what would cause the rear to not air without a major air leak?

Thanks,


Jack

[luvrbus]

How much air pressure are you making it may not be enough to open the shuttle valve to fill the other tanks,they usually open around 90 to 100 lbs on a single air system on older buses 

[tuccitown]

Great point, thank you I think it's only getting up to about 80 psi. I will double check what it gets to. Will be much easier to get it up on the ramps with air in it.

Thanks again,

Jack

[MightyThor]

I would also consider if your leveling valves are passing air,  My Rears were working initially, but the front had an issue and when I replaced it with the first aftermarket unit, no joy.  finally got a simple one that worked, then when I got the bus home, the fronts stay up for many days, but the rears leak down in a couple of hours.  Still hunting air leaks on my bus.

[Utahclaimjumper]

 The governor on your compressor is adjustable.>>>Dan (but you also need to stop the air leaks)

[tuccitown]

Thanks for the suggestions, I have a feeling I'll be hunting down leaks for some time. I attempted to back it onto ramps this weekend and now have it stuck partway up the ramps as the drive axle has no load and the tag axle is partially on the ramp. Fun stuff, I did disconnect the levelers in an attempt to manually raise the rear but it doesn't seem to have any air supply.

Thanks again,

Jack

[TedCalvert]

Maybe unhook the line to the bag from the height control valve, fit a Schraeder valve, and use shop air.  Don't blow up the bag!