| Author |
Message |
Malcolm.
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, November 30, 2005 - 10:12 pm: | |
Hopping some one can help us, We have a 1981 Prevost Le Mirage, the air suspension works correct one side but dose not completely pump up on the drivers side. Yet the air pressure seams ok at 125psi.
Also the clutch was replaced under 1000 miles ago, but the clutch engages at the top of the pedal stroke, is there some kind of adjustment for the clutch? Is it air operated?.
Thank you.
Malcolm. |
CaSteve
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 01, 2005 - 12:46 am: | |
Malcomb, I cannot furnish you with absolute answers but I can suggest that you post this same question on the yahoo groups- prevost busnuts group. My MCI has clutch adjusting instructions inside the driver's side engine access door, but I do not know if they are the same type assembly. As for the leaning problem, my GUESS would be the leveling valve arm is out of adjustment. This information and $5.00 will get you a cup of coffee at some restaurants. CaSteve |
Sojourner (Jjimage)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 01, 2005 - 9:59 am: | |
A quote from Jon W’s post in BNO’s archive;
On the Prevost the ride height is regulated with a single valve in the front and a valve on each side in the rear. There is an arm on each valve that pivots up or down to add air to the air bags or exhaust air depending on which is required. To adjust the ride height the arm is adjusted up or down a threaded shaft as necessary to adjust the height” unquote.
Another word front only adjusts front height and both rear levelers adjust rear height and sides.
Your case could be broken or disconnect linkage on left rear leveler or leaking line to bag or leaking bag or faulty leveler. Not sure if Prevost have air-box above air-bag but non-rolling-lobe-bag MCI do. Known for rust to cause pin-hole leak.
FWIW
Sojourn for Christ, Jerry |
Rob King
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 01, 2005 - 10:09 pm: | |
Hi Malcolm
I have a 91 LeMirage so I have some knowledge of the Prevost air system. My bus airs to 150, so there may be something there to look at.
Jerry is right there is a single valve in the front center that controls front height, one on each side right behind the back wall of the last bay. On the passenger side, you can open the door to the main electric cut-off, shine a light back and slightly down and see the valve. On the drivers side, there is a 8" square panel in the back wall of the last bay near the top that you can remove to see that valve.
I would open those areas so you can see the rear valves then observe what position the horizontal arm is that connects to the threaded rod. Then air the bus up. Once the bus has reached ride height, shut the engine off and listen for any leaks of air. If none are heard then spray a soap solution onto them from a spray bottle. If no bubbles appear, great. If they do, bad valve needs rebuilt or replaced. I would then reobserve the horizontal arm for its position. The drivers side and passengers side should be about the same position.
If the horizontal arms coming backwards off the valves are in the same position and the bus is not level, then very carefully, after blocking the bus wheels to prevent movement, partly crawl between the dual and tag axle, shine a light on the air bags to see if they are fully inflated. If there are bag(s) that aren't fully inflated, there could be a leak in the bag or the air hose filling them. Get the trusty soap solution out and liberally spray the bag and all air lines in the area looking for bubbles indicating a leak. If found fix what is the problem.
If the horizontal arms aren't very close to the same position and you have verified that the air bags/airhoses aren't leaking, then you can adjust the arm by moving the stop nuts up or down as needed.
Some other things you might think about. A maintance, parts and engine manual could help you if you don't have one. One source of that maybe http://www.coachinfo.com (I am not tied in with them in anyway, I just have the CD from them for my bus and like it very much) or of course http://www.prevostcar.com. Another site, if you haven't found it already is http://www.prevost-stuff.com. There is an article on the main page about the prevost air system with pictures, etc. There is also a prevost bus owners forum simular to this one on the site. One final thing, I kind of glossed over it but doing the things above put you at risk of personal injury or death if the bus isn't blocked, jacked, stablized properly. Take the time to do so.
Hope this helps
Rob
91 Prevost
Missouri |
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