-
Water Separator
-
Just a guess there is unlikely a chance all seated coach drivers were trained regarding when to turn on the AC. And if they were trained the odds they will do it are slim. Every time we are in a chartered Prevost I get a little crazy when the driver puts the coach in neutral, engages the parking brake and the coach instantly goes into fast idel. Think about that. That is an indication he was putting it in gear the previous time without taking it out of high idle. With that as an example I doubt the drivers are waiting for pressure to the belt tensioners before kicking on the AC. It just won’t engage until the belts tighten.
Tim, If you and Tom are worried about belts jumping off the pulley, the time to check is not when doing the pre-trip inspection, but after the coach has started and you want to verify they are not laying in a pile at the back of the bus. They don’t come off when the engiine is turned off because the air pressure is holding them tight. They come off when you have no air pressure. Must be an H3 or Marathon thing. So far in 26 years the number of times belts on my coaches have come off the pulley is zero.
-
It’s hopeless!
-
I have received more than one phone call from folks who jump in their coach and crank it and drive, then 20 miles down the road overheat….Belts off, if you use due care and start the coach let it idle low idle until aux air is up you more than likely will not have the issue. However to give no chance of this do as Tom says…..I know this will get me a text from Jon….oops he cant text…..
-
Ok, so if my Liberty aux compressor is pressurized (always on and will come on as needed), then does that mean the belt tensioners are tight?
Please don’t throw stuff at me, where is the gauge for the belt tensioners? The gauge in the generator compartment is just for the genny bags, right? There is a plaque that says keep them at 14 psi.
Mark
-
But
you must be hallucinating Jeff, it can never happen, remember the
thousands of of seated coaches never have an issue and more
importantly, the Godfather has never experienced this problem, so it
does not exist. It just can’t happen, impossible, no way, it’s a
myth.
I think I have figured it all out, it’s the stuff he puts on his garden and the spreading of mulch has finally taken it’s toll, there must be toxins in the mulch he’s buying. Holy crap, he just sent me an invoice for mulch.
-
Godfathers on the wagon Truk.
He’s just mad that bus doesn’t say Marathon on the side and he can join the 2 air systems to inflate if needed.
I’ll wait for the on slaught coming.
Later
bv -
Actually Jon,
This would be part of my pre-trip inspection. But I’m adding Tom’s suggestion now …why, … Refer to my earlie post and, it will only take 30 seconds.
I know you guys sang Kum-Ba-Yah together at the seminar …. Since Sarge was watching over both of you!
-
MM,
No, your Prevost Aux is what supplies the belt tensioners.
Liberty and Marathon are plumbed different. We can take the independent Marathon Aux air and open the yellow valve and it will send air to the Prevost side.
Your bus should be solid and you should hold air for a month if not longer. I can hold 60lbs of air for a month before it leaks all the way down.
Truk is just assuring himself not to spin a belt off by doing it that way because he can.
Later
bv -
I’am not getting getting into this mess ….but I’ll make one point to help Tim. Determine you have rock solid mini air bags, connections and lines used to hold belts tight.
Install a check valve next to incoming air line prior to mini air bag regulator. Jeff should have these or Prevost the next time you get to one of there locations. Easy to install and prevents belt tensioners from relaxing.
hope that helps…..OK
AL
-
I agree with Jon on this one and echo what Jeff said.
Use due care when you start the coach,
let it idle at low idle until aux air is up and you more than likely
will not have the issue.I also like to hear the air dryer purge a time or two before I drive off.
-
Thanks Michael. Glad to see another experienced owner agreeing with me.
Mark, as long as you have aux system pressure on your Liberty, as soon as you turn the key on (but before engine start) air is entering the belt tensioners if they have leaked down. If they have not, they are already tight.
One thing most don’t understand unless they have looked at my engine is that I have the one piece, three groove belt for my fan drive. I had at one time a coach that had three supposedly matched belts for that purpose, but unless you were lucky enough to get three belts that were exactly the same size you had one or two flopping around because the smallest of the three controlled belt tension. I won’t use three individual belts for that reason.
If you Marathon guys actually want me to believe that prior to engine start you actually go out, open the valve between the Marathon accessory tank and the Prevost tank, then close the valve after the belt is tight or you are at the next campground you must also believe in Santa Claus.
-
That’s what I do Tim, takes little time with the yellow valve to charge the Prevost side for the belts then close it and start.
-
Second Tom an this one for Marathon coaches.., this is my start procedure to avoid belts issues.
-
Got me wondering about my belts so went out to the shop today and checked them. After sitting for the last 5 months while we were in Florida for the winter the belts were all still tight! Guess I won’t worry about them on startup.
-
Thx Al,
I’ll be at Marathon Monday and maybe they can do this.
Log in to reply.