bob@wavefrontsoftware.com Report post Posted March 27, 2021 (edited) 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 March 30, 2021 by C-928603 Share this post Link to post Share on other sites
desertdeals69 Report post Posted March 27, 2021 Its probably the radius of the rear control arms rotating. It will always roll forward not backwards when the back lowers. Share this post Link to post Share on other sites
bm02tj Report post Posted March 27, 2021 When you air up the suspension it will go back as per above Share this post Link to post Share on other sites
bob@wavefrontsoftware.com Report post Posted March 28, 2021 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! Share this post Link to post Share on other sites
rayin Report post Posted March 28, 2021 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, #%$^. Share this post Link to post Share on other sites
wildebill308 Report post Posted March 28, 2021 Well now I will have to look and see what my K2 does. Welcome to the forum. Bill Share this post Link to post Share on other sites
