No Supply side Air - Printable Version
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RE: No Supply side Air - TJ Clark - 05-27-2025
(11-03-2024, 10:41 AM)cwl1979 Wrote: Does the engine compressor build air like it should, but wont switch over to the supply air? Change the pressure protection valve, they are cheap. https://www.amazon.com/Meritor-S9348994010-System-Pressure-Protection/dp/B07NZB5DCV/ref=sr_1_8?sr=8-8
Once that is changed if problem persists there are other issues that it could be.
Is it on the fender well like the ping tank is on the other side?
Do I remove the wheels the gain access?
RE: No Supply side Air - Richard - 05-27-2025
As covered earlier in this post, the PPV is located on the bulkhead forward of the drive axle, just about dead center.
RE: No Supply side Air - TJ Clark - 05-27-2025
(05-27-2025, 12:34 PM)Richard Wrote: As covered earlier in this post, the PPV is located on the bulkhead forward of the drive axle, just about dead center.
Sorry I did not see the post where you said in the middle. Thanks.
RE: No Supply side Air - TJ Clark - 05-27-2025
I'm on a gravel pad.
Bags are all deflated.
What safe way is there to access the PPV?
RE: No Supply side Air - Richard - 05-27-2025
Crawl between the tag and drive tires, it can’t fall on you if the air bags are completely deflated.
Normally, I would NEVER tell anyone to crawl under without cribbing. But in this one weird scenario you are safe unless three tires blowout simultaneously.
But it you are not a skinny chick, then then next best option is to disconnect the air bag lines from the six pack and air them up with an external compressor. Obviously crib it before going under.
RE: No Supply side Air - TJ Clark - 06-24-2025
Finally found a mechanic to get to this. I don't fit, never would have on my best day.
The valve is on backorder nationwide. We decided to bypass it for now. I have to move the coach in a few days so time was also a factor in my decision.
We talked to Jerry at Newell, his explanation for this valve is to keeps the brakes working in the event of a massive air leak on the secondary side. So I will need to be diligent on my gage scan practices while driving.
So this hopefully puts this thread to bead.