Harry
Forum Replies Created
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So after doing a little more investigatiion and interviews, here’s some additional information:
As you’re rolling down the road, air “can come in” thru your vent pipe on the roof. There is no check valve in this vent pipe. But it especially is susceptible building up air when your fresh water tank is less than half-full of water.
In addition, while rolling down the road, even with a check-valve in the water pump, the pressure switch on your 110v water pump can sense that pressure is taken off it when the water flows away from the pump. For these two reasons, Marathon did a design change.
Don’t shoot the messenger …
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I think older coaches had a single cap with the pressure release feature. Later models I think had a second cap on top of the tank in a very difficult place to see and get your hands on.
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/anyone up to changing a windshield at this gathering? If so I’ll bring my spare windshield and suction cups.
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Good morning
unless it has been removed your coach has air over hyd cyls to raise the ride ht with tag picked up, only used for a couple of years 95 & 96. dont know that is a problem could be some of the linkage jammed on the system especially that you heard a loud noise when you picked up the tag. if you go back to McWhorters see if they will put it over the pit so can walk around under it
Call prevost RSM Jim Malcomb 1 800 837 7386 or ft worth scv center 817-685-0250 askfor Rosie she can tell you where Jim is.
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The five port Norgren is the switch point that opens the path to and from the ride height valve, or closes that path when the key is off, or opens the path so you can manually fill or exhaust air bag air.
On the valve you will see end caps with an air line in them. When you want the coach to air up through the ride height valves as you are attempting to do, air pressure coming through the manifold with the solenoid valves in the steer comparment (center solenoid valve) enters one of the end caps and pushed the internal spool sideways to open the path between the ride height valves and air bag.
That shows a 3 port valve and air would enter the end cap on the left top and push the spool in the valve body. The five port is similar in that that it has ends caps, springs and a spool. Verify you are getting air to the end cap (almost guaranteed because the other valves are getting air to actuate them). Remove the valve and either replace it (Prevost stocks them) or disassemble it and free up the center spool. The screws holding the end cap are often frozen because steel and aluminum parts will do that but if you can carefully remove them without breaking them you can clean and lubricate the valve. If it is corroded or filled with water or sludge it probably will leak but it will get you going.
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Ok – First off – thanks everyone for all of the information. I’ve been working all morning testing your theories and want to give an update. I’m also including photos to give you a visual aid.
Here are photos of the process. Please take a look and let me know if I’m checking it out correctly since it seems that the valve is working based on what I’ve done so far.
Here are the ride height valves:
right valve before air:
Right rear ride height valve closed once the right side is aired up.
Left side ride height air valve before air, same after air
Bus with the leans (you’ll have to lean to view since it only wants to upload sideways for some reason)
Next step, remove the left side ride height linkage. (Yes, bus is definitely blocked!)
linkage disconnected and valve in closed postion.
Manually opening the left rear ride height valve holding until air flows
Removing rear bag air line to check for air flowing
Air is flowing correctly out of the valve.
Air stops flowing when the valve is closed.
Hook it all back up and still no rear bag inflatiion.
So, if I did everything right, I guess it must be the bags unless there are more valves beyond this point in the system? Or possibly a tag axle valve or selonoid that i am missing? When I went over the speed bump with the tag dumped, it did feel like something blew, but I just cant imagine that happening with these two drive bags being less then a year old and very little wear on them maybe four thousand miles?! And I cannot hear any leaking anywhere? Although it’s hard to hear anything subsatantial with diesel running trying to air them up. I think I can safely rule out the ride height valve being the culprit unless Im missing something?
If it is a popped bag, any idea how could I tell if it was?
The guy at McWhorters in Lubbock jacked it up and checked the tag axle bag for leaks, but is it possible that the other bags are popped? (Glenn – McWhorters seems to work on a variety of big rigs, but if you know of someone with a sweet spot for prevosts, please let me know.)
This is definitely the last time I dump my tags unless I’m stuck in an underground alley in downtown dallas.
Thanks for all of the help and advice – any other suggestions are greatly appreciated.
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Rocky,
We’ll have to get together sometime!
Here’s a final pic of the install as we were packing up to leave for a few days
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Hi Jon, I think that’s probably right, I’ve not thought about it that way? Everything you read about coaches mentions all the specifications and the tanks are of course part of it. I’ve not filled or drained tanks as yet and I’m especially curious if I have a gray and black or a combo tank?If anyone knows I’d love finding out. I guess this is one of the negatives of owning a bus when the converter is out of business. But I think it’s one of the few because the Beaver Coach reputation is excellent!
Harry
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Hey Harry,
What happened to HJ ? Been wondering about You and Your coach. Have You got it fixed yet ?Bsafe,
Rocky -
Foxtrot, you may be right. I wondered the same thing since there are no Prevost logo on the bus. But this is what they are advertising: Prevost M5000 chasis. I am new to this so that is why I am coming to you guys and gals for help. I am wondering why the it is priced like it is.
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I’m fighting with my Amana at the racetrack and can’t get a serviceperson. Best it will do on temps is about 45 and 65. It’s blowing cold air inside and hot air out the bottom so I’m guessing it’s not compressor or fans. Had interior fan replaced a few years ago.
Hoping an Amana expert on here can help. Is it possible the defrost heater(s) are stuck on for some reason or ??? Thinking if it’s a defrost heater I maybe can disable for the balance of my trip.
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Also make sure you dont bump the micro switch in the process and have it move out of position b/c it will drive you crazy when all the bay doors are locked and the light still says you have unlocked baggage doors.
Patrick…where is the micro switch and what does it look like? I’ve had Marathon and another shop both try to fix my dash light that is continually on saying that my bay doors are unlocked when indeed they’re locked. I pretty much ignore it and still check all my doors before takeoff but I would love to have it fixed.
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https://www.ebay.com/i/171069091752?chn=ps&dispItem=1
Here is a link for 24 volt ones on Ebay
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Nothing wrong with your memory Jon, 700,000 is exactly right! it was an entertainers bus as I remember, very sharp and very well detailed. Jon wanted to see what the front of the bus looked like because the coach had a bra. But the sales guy and owner as it turned out, was having none of that. He said he was afraid to take the bra off for fear he couldn’t get it back on again. Jon slipped his fingers along the side and it was as lose as a long necked goose! Jon says to the guy “as lose as it is you’d have no problem buttoning It up again”, but the owner thought it was a bad idea! It may have been perfect but had to be left to the imagination because he wasn’t showing it!It was a good day Jon, thanks!
Harry
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OK..I did google and it works if I use the ctrl key hold down and press V at the same time. Normally you can do this with the mouse.
I like to use spell check and copy and paste my text.