BAC Forum
General Boards => Technical Support => Topic started by: Steve Huber Co-Admin on March 01, 2024, 02:51:01 AM
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Early in the winter I replaced the Valid Power Gear keypad as it had quit working. Also replaced the rear air bags as found they had slow leaks. About a month later went out to the barn and found the coach had sagged to the left due to the left rear air bags being completely collapsed. It had been fine the night before. Started coach and bags inflated as normal and held. Checked for air leaks and none found. Coach remained level for about 2 weeks. Then one AM found the coach sagged to the right due to the right rear bags being completely collapsed. Coach has been level the night before. Re-leveled coach and checked for leaks. None found. Called Valid as thought problem may have been due to the new keypad. They were very skeptical. Scratched my head for a couple of days and then called Eric for his thoughts. He said it sounded like something was causing air valve(s) to open completely and suddenly. Since it was winter he asked if it was possible there was water in the air system that was freezing in the valves. I told him I drained the tanks regularly. Went back to coach, opened air valves and no moisture was present. Then I realized I had forgotten the small auxiliary tank. Opened the drain and almost drowned… Opps!
Aired up and dumped system multiple times to evacuate as much moisture as possible. No more problems but won’t know for sure until next winter when it gets cold (teens -low 20s). Barn is unheated so I run AH to keep water bay from freezing and front of coach stays relatively warm due to AH radiated heat. Rear axle area is coldest. Thus 99% sure problem is solved.
So, don’t forget about the aux air tank… and THANKS Eric!
Steve
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I assume the auxiliary tank is not a feature of all models.
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Joel,
I'm referring to the small tank the auxiliary air compressor supplies to keep the air bags filled so the coach maintains its level when parked with engine off. Would probably not be needed in a hydraulic leveling only coach.
Steve
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My bad. I didn’t realize that aux. pump had a tank, but thought
that (on automatic leveling mode) it just directly added to low bags
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Steve, where is that auxiliary tank and drain located on your coach?
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Gene,
It's in the right front corner accessible by opening the generator slide. My coach has a Monaco Roadmaster chassis so may be different on Magnum based units.
Steve