06-29-2023, 08:42 AM
(06-28-2023, 06:38 PM)Richard Wrote: If you plug in the shop air and it does not lift coach, then you likely have a PPV issue. Confirmation of PPV issue would look like this. If you plug in shop air and the brake air gauges register your shop air pressure, BUT the supply gauge does NOT, then it is very likely you have a defective or stuck PPV.
A second diagnostic you could run to eliminate issues with the travel solenoid circuit would be to plug the coach into shop air, put the coach in level mode, and press the rear raise button. Again, if you have NO pressure on the Supply gauge then the coach will not raise.
If you absolutely have to force the coach to raise enough to get it into the shop, then do this. Locate the rear six pack of HWH solenoids in the passenger engine bay. On the aft end of that aluminum block, you will find a 3/8 air line plumbed into the end of the block. All of the ones I have seen were blue. Disconnect that air line and plumb shop air into the block. Put the coach in level mode, not travel mode, and push the rear raise button.
That is very helpful. Thank you so much. I will look into this today! I really appreciate your help!