Air bags not filling up

[buswarrior]

I've seen 'em simply be stuck, and a short bit of "agitation" by moving it and it springs up.

Sitting is the DEVIL for these worn out old whores.

Achieving some sort of normal pressure is half the battle, bent leveller arm, seized valve, ancient lube inside finally gone hard enough to block movement...

The only reason they go, is if they keep going. Park it on dirt for months at a time.... trouble.

It ain't yer Dad's Oldsmobile...

Happy coaching!
Buswarrior

[Gordie Allen]

My thinking is to (1) make sure the leveling valve is moving freely. (2) If that doesn't do anything try blowing out lines (100# should do that, but I guess a big gob of old hard crud could block it (3) or bad check valve.

[chessie4905]

There is only one leveling valve on the front of the GM's. It controls both bags. Two at rear, one for each side. If right rear isn't filling, it can tilt front of coach, giving the inpression that there is an issue at the front.

[richard5933]

Paradise fire victims we gave our bus to just called with same issue. Right front side won't fill. Air pressure 100# and they can't hear any leaks. They're in Redding. Any shop up there that could help? Also, could it be the leveler valve?

From my understanding, if it is just one corner leveling valve not the first thing to look at. When I have had one corner not building air it was either a lose air line connection at that corner or a leaking bag.

The front leveling valve controls the front-to-rear height, so two corners would be down. The rear valves each control the height of the front & rear corners on that side, so again two corners would be down.

[Gordie Allen]

So the problem has to be downstream from a check valve on the right front?

[Gordie Allen]

So can a 4104 be towed without removing the drive shaft or releasing the brakes?

[Dave5Cs]

Releasing the brakes and pulling the axles.
or removing the driveshaft.