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C-928603

Parking brake releases 2006 newmar

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I have a new to me 2006 Newmar Dutch Star 4028 that seems to roll a little when I dump the air in the suspension.  If I'm parked on site with a slight incline and I am about to put the jacks down it will roll forward an inch or 2 when I dump the air bags.  I'm assuming there is either a partially plugged vent or a check valve between the parking brake circuit and the rear bags vent but I'm having a hard time finding a complete diagram of the whole air system.   The parking brake does hold well even on pretty steep inclines any other time.  It just acts like it is getting fed some of the vent air from dumping the bags.

Any help/advise would be greatly appreciated!

Thanks,

Bob

Edited by C-928603

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Its probably the radius of the rear control arms rotating.  It will always roll forward not backwards when the back lowers.

 

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Interesting.  I had thought about that but figured I'd only see the front move if the rear brakes were on and the control arms swung as the bags deflated.  Wouldn't the rear wheels stay put if the brakes were on even as the control arm position changes?

Now...how to correct the spelling of the title...silly auto correct always gets me in trouble!

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30 minutes ago, C-928603 said:

Interesting.  I had thought about that but figured I'd only see the front move if the rear brakes were on and the control arms swung as the bags deflated.  Wouldn't the rear wheels stay put if the brakes were on even as the control arm position changes?

Now...how to correct the spelling of the title...silly auto correct always gets me in trouble!

Yes the rear wheels are locked by the spring brakes, the front wheels roll forward about 4" on my Spartan chassis when air is dumped. It was annoying at first because I placed the jack pads first, the coach would roll forward, then I'd have to re-position the jack pads. Now jack pads are after dumping air which makes positioning them more difficult to see because my coach is 5" above the ground then.

I agree, auto-correct is a pain in the __, It took me several hours to figure out how to disable auto-correct in my browser when all I had to do was search for a Utube video showing how, #%$^.

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