| Author |
Message |
Jack Gregg (Jackinkc)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 27, 2004 - 6:46 pm: | |
Does anyone out there in cyber-bus-land understand how Prevost “level low” works? I think level low is an option that is primarily used on coaches destined for the conversion market. I have a switch to turn level low “on.” You are not supposed to turn it “on” unless you are parked. When level low is on I have switches for left rear, right rear, and front; separate switches for up and down. I think Prevost used three SPDT switches but the converter (Royal) decided to use six SPST switches.
Level low has been a mystery during the two years that I have owned this 1984 Prevost. Sometimes it works and sometimes it does not. Also, the there has been a leak in the left rear so that the bus settles overnight. Two weeks ago I had a tire blow out and damaged the right rear-leveling valve. Now I need to (1) replace the right rear leveling valve, (2) find out what is leaking on the left side, and (3) figure out how to make “level low” more predictable.
First batch of questions:
1. In normal operation of level low, are you supposed to dump out all of the air first and then start adjusting? Or are you supposed to just make adjustments starting with the bus suspension aired up?
2. In the rear wheel well I find a mechanical load leveling valve and an electric actuated “skinner” valve. The valve is called the level low valve in the parts diagram. This valve clicks when I turn level low on and off but not when I try to lower or raise the bus. Most of the air lines disappear into the chassis so it is difficult to figure out how stuff is connected. Is this valve supposed to raise & lower the coach? If not, where is the valve that controls it?
Thanks for any help.
Jack Gregg |
H3 (Ace)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 27, 2004 - 7:41 pm: | |
Jack not to sound rude but with what your describing, it would do you better to just call Prevost. With the description you just layed out, almost anyone at Prevost would be better to help you since they Mfgr. them and sell them. I have a friend that also owns a H3 and he has had nothing but praise for the service he has been given from them all over the country!
You might get the answer your looking for there more so than a guess here!
Ace |
Jack Gregg (Jackinkc)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 27, 2004 - 9:27 pm: | |
Ace - thanks for your comments. I have heard glowing reports from others about Prevost’s service but that has not been my experience. I did ask the parts guy where the valves were located and I can not find them in the spare tire compartment. Maybe I should keep asking until I get a satisfactory answer. If anyone here can help I will appreciate it.
Thanks
Jack Gregg |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 27, 2004 - 11:28 pm: | |
Jack,
Call Tech service, not a parts guy.
Ive had good response to questions about my father's Prevost. A salesman is also a good resorce for your type of question
Onward and Upward
Marc |
Jim Stewart (H3jim)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 27, 2004 - 11:33 pm: | |
As I was looking into the possibilty of covertng my seated H3-41 coach to a level low system, I asked Prevost for a list of parts I would need to add. This is that list. The largest $ were the tag axle logic conversion about $1000, and the controller itself, about $1000.
I too have found Prevost to be very helpful and professional.
I still have not decided on a coach leveling system. I hope this list helps. The tag axle logic is because the tag axel can lift up, and this deals with that scenario. I understand the bus has to be parked, engine off, ignition on, then turn the system on. It self cancels when the engine is started and the coach moved.
64173 INSERT / GREEN / UP/DOWN (LEVEL-LOW)
131433 PANEL ASSY
391470 MOULDING / AROUND LEVEL
391827 BRACKET / TO FIX LEVEL
500590 NUT HEX NYRT ZP M4-0.7
500591 WASHER FL ZP 4.3x9x.8
500670 NUT HEX NYRT ZP 8-32
502162 SPRING, COMP. / .240 O.D. x .312 x .026
502643 SCREW MA PAN PH ZP 8/32x1 1/4
503402 TUBE, NYLON 1/4 O.D. / BLACK S.L.
503404 TUBE, NYLON 3/8 O.D. / BLACK S.L.
561475 SWITCH / M/ON-OFF-M/ON / S.P.D.T. CH-OVER 511.069
561855 KNOB
562517 SWITCH / 10 AMPS 4 POSITIONS 90¦
630075 LEVEL 5 WAYS
641057 VALVE, 5 WAYS, 3 POSITIONS
641274 VALVE, 3 WAYS, 2 POSITIONS N.C. / (AS SHOWN
131454 KIT TO REPLACE REAR LEVELING VALVE
131455 KIT TO REPLACE FRONT LEVELING VALVE
142019 KIT TO INVERT TAG LOGIC |
Stephen Fessenden (Sffess)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 31, 2004 - 12:10 pm: | |
The level low system has three solenoids that close the air lines to automatic level control valves and open them to three manual push pull valves on the dash. These solenoids are closed by a switch on the dash or when the ignition swithch is off. One solenoid and push pull valve operates the front bagsl, one operates each side of the rear. Pull to release air, push to add. I don't know if the manual valves are active when the switch is on automatic, but I think they are. That would mean that the solenoids are simple on off valves, not two direction valves. I will post if the manual valves are NOT in the system all the time. They will be over-riden by the automatic valves and serve no function until the switch is in the manual position or the ignition swithch is off, but it simplifies plumbing. |
Stephen Fessenden (Sffess)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 01, 2004 - 7:05 pm: | |
This is to confirm that the level low valves on the dash are always in the circuit on my 1981 prevost Le Mirage. The solenoids simply lock out the automatic valves when the engine is off or the switch is in the manual position. Each level low valve is two way, center off. One outlet conects the air line for one system: front, rear left, rear right. One side vents to outside air, the other connects to bus air pressure. CENTER OFF. They are spring loaded so you have to be there activating the valve to change level. It cannot be left filling or dumping air. You have to be there. |
|