Sitting in the warehouse happily. I let the air completely go out of the system. The back comes up to normal ride height but the front is still down and 0 on supply guage :-( I think the compressor is ok since the back and brakes are working; sound like a ride height control or similar; odd that only the front is down on both sides; no air leaks I can hear (I don’t hear so good)…
What you guys/gals think?
I called Black Label repair and they sent out two guys that seem to know their stuff. Called Newell and spoke to Tanner and he suggested trying to make the coach go up or down in the rear to maybe break something loose and then the valve
(10 hours ago)pairodice Wrote: I called Black Label repair and they sent out two guys that seem to know their stuff. Called Newell and spoke to Tanner and he suggested trying to make the coach go up or down in the rear to maybe break something loose and then the air pressure protection valve
from Grok: air brake system component (pressure protection valve). It protects the primary air system by closing off secondary circuits if pressure drops too low (typically closes around 45 ± 5 PSI). Common in heavy-duty trucks, buses, RVs, and commercial vehicles with air brakes.
• Ports: Multiple ports (Supply, Delivery, etc.), matching the multi-port cast body in your photo. • Cross-reference / Casting: The T-21340-0 and 900328 markings align with OEM castings used on this Bendix valve.
(10 hours ago)pairodice Wrote: I called Black Label repair and they sent out two guys that seem to know their stuff. Called Newell and spoke to Tanner and he suggested trying to make the coach go up or down in the rear to maybe break something loose and then the air pressure protection valve
from Grok: air brake system component (pressure protection valve). It protects the primary air system by closing off secondary circuits if pressure drops too low (typically closes around 45 ± 5 PSI). Common in heavy-duty trucks, buses, RVs, and commercial vehicles with air brakes.
• Ports: Multiple ports (Supply, Delivery, etc.), matching the multi-port cast body in your photo. • Cross-reference / Casting: The T-21340-0 and 900328 markings align with OEM castings used on this Bendix valve.
what air pressure do yo see on the air gauge on passenger side in engine bay? I think that has to be 120 before you have enough air to air up front. Also the front bags have tiny little 1/4" air lines to the bags. Takes a while to air up from empty.
If the back aired up, you can eliminate pressure protection valve, engine air compressor, and a whole lot of air supply rated problems.
The first thing to determine is if you have an HWH or an air problem. I have helped you with a similar problem before. You had an HWH problem then. If you choose to check voltage, use a DVM not the 12V probe light
I know the front is down, but if at all possible determine if the travel solenoids are energized by seeing if a magnet will stick to them with the key on, and coach in travel mode.
Will you confirm the seemingly contradictory statements. The rear aired up. AND the supply gauge reads zero.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home )
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