[Richard]

Thanks Mike, I appreciate the feedback. You were right, I called Prevost and got the standard bay door struts very reasonable from them.

Richard

[Richard]

Thanks Mike, I just figured they were pretty standard for our coaches and someone had a particular source already to reduce my research.

Richard

[Richard]

Well, I didn’t get any responses, but through continued examination and creative methods of introducing isolation air, I did find my issue, so I thought I would post in case it would help someone else that may experience the same type of dilemma.

Applying air through the level low valve could not deliver enough volume to the front airbags and since the solenoid (Skinner valve) was faulty, I couldn’t use the accessory tank either. I disconnected the supply line from the level low valve and rigged a connection from a air blow gun connected to my portable compressor and supplied a higher volume of air to the airbags. In doing so, I could now hear a residual air leak that I couldn’t hear before. I eventually found an airbag leaking from the top mount that before was not leaking due to it sealing itself under normal circumstances because of the rubber (anti abrasion) ring applying pressure when in ride position. When I raised the front of the bus all the way up with the airbags there was nothing applying pressure to the slow leak. When I blocked up the coach and the air leaked out, now there wasn’t enough air pressure to overcome the leak, therefore, it wouldn’t blow the bags back up. Just for positive confirmation, I disconnected the bag, isolated the airline and used the level low valve to charge the system, everything worked and held air. I ordered the bag from Prevost and will be replacing upon arrival.

I know no one responded on this, but I have had alot of successful feedback over time and appreciate the responses I have had. Maybe this will help someone down the road.

Richard

[Richard]

How is it applied, what do I need, and how much is the product?

Thank you

Richard

[Richard]

OK, I will get some uploaded. I have attached my air schematic supplying the front air bags through the driver’s level low control valve as well as the supply air to the height control arm. I only see two areas of possibility within that system if it follows the air schematic, both have to be physically located. (1) A pressure safety switch at the secondary air tank, I have one at the filter housing, but I didn’t see a second one in the compartment. (2) The level low solenoid valve that is inline between the height control valve and the air bags. If I can find that solenoid, I think that is the culprit since it is related and I have replaced the height control valve? If I feed air manually while operating (depressing) the front level low control valve, I can fill air in the front air bags and lifting the front of the coach. According to the schematic, that bypasses the solenoid. What do you think?

[Richard]

Chad,

I have looked all over the compartment and don’t see the pictured skinner valves. If I am tracing correctly, I think the level low system is intact?? But, I originally installed a level valve to correct the original problem of auto lift, but the new part didnt make a difference, I still have to manually charge the front bags with the “Front” button next to the driver’s seat.

Richard

[Richard]

Thanks Jerry, I tried the tech section. I even clicked on the “older” archive tab, but I couldn’t pull up my year including using my VIN. I will contact them direct to see if there is any other option.

Richard

[Richard]

OK thank you Chad. I will make another thorough round at looking for them and let you know what I find.

I appreciate it.

Richard

[Richard]

Hi Bill,

When my bus is in auto level (Road) mode, the front bags fully inflate now instead of stopping at normal height. The only way to adjust the front back down to level is switch to level low so I can manually adjust the air. That is how my system is set up to operate. The selector you are referring to is a later version than mine, I have a toggle switch that is either road mode (auto level) or level low (Manual adjust) that adjusts the front, right rear, left rear independently. After replacing the front solenoid valve, and earlier the front leveling control valve the front raises all the way up in road mode.

Richard

[Richard]

Disregard my question, I was studying the operation, and figured out how it operates… it would have bit me LOL…

Richard

[Richard]

Good evening Chad, Now that I have spent several weeks tracking, researching, and talking to Prevost and Liberty, I finally understand the level low and air systems on our vintage coach. I am going to reference the picture on the right you attached for me earlier talking about the ride valve and cut wires on the other valve. Where the wires are cut, that is the original Front leveling valve solenoid the allowed bus air to charge the front airbags to road height with the coach running. The level low valves at the driver position bypasses that solenoid with the level low switch on or with the key off allowing the coach to be manually leveled. This is how my coach is setup, Liberty said during our year models, they only changed the position (location) of the level low valves for convenience of the coach owner if requested. They did not relocate the valves on my coach. It appears for whatever reason, your level low solenoid was bypassed. That very solenoid was everything that kept my auto level from working with the front leveling valve.

With your help on the skinner valves, I was able to get mine operational again. I just wanted to let you know about the picture and it pointed to the solenoid that I couldn’t find…

Richard

[Richard]

Hi Chad,

I found the skinner valve that controls the from height control valve and its faulty, it is an original prevost part. I called them and they looked it up, but didn’t have it in stock anywhere in their system and stated it would be a 90 day delay in delivery…… They did give me the brand and part number, and I have done some looking, but can’t seem to find anyone else that doesn’t have the same answer. Do you have a resource I may be able to get a skinner valve that is 24 volts with at least a 125 air pressure rating? Otherwise, it looks like I may have to wait at least 90 days for a replacement.

Thanks for your reply.

Richard

[Richard]

Thank you Chad, valuable information. I took the non-working valve apart as best I could to understand some of the inners, it actually came apart and exposed the orifice that I guess opens and closes the air flow?? I have attempted to remove the orifice, but it seems to be stuck. I have found another used valve to replace it with for now, then continue to research for future replacement options. I have attached a picture and circled the part I am speaking about. Does it come out, or??

Thanks again, I appreciate your help..

Richard

[Richard]

Thank you Chad. Just for clarification, do you mean change the guts out on the skinner valve? If so, I don’t mind doing that as an option as it would make available parts I have not yet been able to find. I will also look into your other suggestion of a possible later Norgren as well.

Thanks again.

Richard

[Richard]

Just let me know when you get home and I will call and talk to you about my coach and your product.

Thank you Ted