HWH 625 Leveling System on Allegro Bus 2001 will dump air, but not extend jacks

[bistate]

on a recent trip our 2001 Allegro Bus was leveling automatically ok, then It would dump air and lower back to jacks. Now it will dump air and not lower any jacks. Anyone had a similar experience?

 

[Frank Hurst]

Call HWH. I have not talked with them in 2-3 years, but their tech department was really helpful when I called.

 

[Gary RV_Wizard]

Could be the hydraulic pump desn't run (fuse, bad pump) or a loose wire from control panel to pump & reservoir.  However, if you hear the hydraulic pump running and the jacks don't move, then the valves to the individual jacks are not opening. Rare for that to happen to all the jacks at the same time, though.