[Gerald]

I was curious about #55 the double shuttle check valve, air inters from brake pedal assembly via primary tank to the tree for Primary and the secondary systems gets air from the secondary tank, them from double shuttle goes to E-brake and R-14 valve in rear. What does it do between Primary and secondary systems?? If double shuttle is bad what affect will it have. Just when I think I understand the system then looking at air schematics I’m confused , Also from (front) system secondary pushing brake pedal applies air pressure to front brakes and to control port on#52 spring brake valve assembly, So front system (Secondary) has something to do with spring brakes?

[Gerald]

99% of the time the transmission temp will track engine temp. But if the coach is retarder equipped and the driving is in mountainous terrain then the temp needs to be monitored because the use of the retarder drives up transmission fluid temps significantly.

[Gerald]

I had 1 side froze up, the swing bracket on 1 side was froze up and the bushing had turned and grease could not inter and the clevis was broken, pulled swing bracket off with a puller, hammered bushing out put some locktight on bushing hammered it back in,cleaned up everything, put swing bracket back on greased it,put on a new clevis and now it works great. I think that the grease fitting gets ignored on that swing bracket.

[Gerald]

When Prevost made the switch from 120 ti 315 tires they went with a steel inner wheel to keep the width of the drive axle tires between the coach fenders. If you replace the steel wheel with aluminum ones I believe the additional width will cause the outer drive wheel to rub the diver axle plastic fender.

Recently Michelin appeared to change their posture regarding the acceptability of using 8.25 wheels with 315 tires and issues a new chart regarding 315 tires mounted on 8.25 wheels. They do not encourage the use of 8.25 wheels, but apparently will allow them as long as the loaded weights have the corrected pressures.

Note that for a given weight the pressures for 315 tires varies depending on wheel width.

The use of a Pressure Pro sensor on the inner dual regardless of wheel width is OK because it eliminate the valve stem extension, and using the tool Tom designed to access and remove the sensor and a straight foot tire chuck that inner wheel and tire is set up perfectly.

If I am correct all Prevost coaches between around 1995 and 2000 ran steel inner drive axle wheels.

[Gerald]

Jon,

I have not dismounted the tire yet, but I will take pictures when I do.

I have been waiting for all my new accessories to arrive, centramatics, new

stems and new spacer for in between the aluminum outer and steel inner.

I run my drives at 110, and the first warning I got from my pressure pro was

after the explosion telling me my inside right rear had zero pressure.

The 2012 tires do have weather cracking, but not bad according to the scale

we just got from Michelin at the seminar. The right rear outside 2012 tire

that drove the final ten miles home is still holding air, although supported

by a jack and a stack of wooden blocks.

I did contact Michelin and start a warranty claim. I do not have any record

of when the tires were actually put on, but do have eights weeks left from

seven years from the DOT dates. Michelin will send a representative to

inspect the tires once they are dismounted. I will post the results. I do

have a claim number from Michelin to reference.

I don’t think the inside tire ever got a lot of sun exposure. We picked up the

coach in September of 2016 in Baltimore and went straight to ETLC. Since

then we have put almost 20,000 miles on the coach. We have always had

the pressure pro system. The only warnings we get are lost signal.

[Gerald]

Well after removing the cover the belt looks like new. A-38 in case someone with a similar unit needs one.

i could not restart it from inside the coach but that is probably an issue for Liberty. I did restart on the gen switch on the unit. The Kohler has a fan at the front of it and it was pushing air. I could not see the fan behind the radiator and could not feel or hear any air movement there but it may not activate until a higher temp is reached. I did not leave it on to see it overheat but I assume that would happen again.

Thanks much for all the suggestions. Sill looking.

Wave

[Gerald]

Mark’s pictures look exactly like what I was faced with. I was baffled that the design lasted as long as it did. One of the very few poorly engineered things I’ve run into in our coach.

[Gerald]

We’ve had great luck and experiences at the state fairground in Iowa (Des Moines) and Indiana (Indianapolis). I know Wisconsin State Fair Park in West Allis has an outstanding RV park … which being Wisconsin I would expect nothing less.

[Gerald]

I agree with a previous poster. What part isn’t working?

While on our recent 100 day trip I posted that we had trouble with our Fantastic Fan. The roll pin that connects the gear box to the arm that lifts the vent cover came out (for the second time) and I replaced it with a simple stainless steel button head bolt and nylok nut. Easy Peazy once you’re to where you’re at.

From what I can tell, everything for the vent and fan works off the vent cover. As the vent cover raises, a micro-switch turns the fan on; as the cover closes the same micro-switch turns the fan off. When the vent cover is open, a little piece of something is now exposed to the elements and as soon as this little piece of something is exposed to moisture, the vent starts to close.

So if the roll pin is out, replace it.

If it doesn’t work in spite of the roll pin being in place, then I suspect you have an electrical problem. Look closely at all the connections, the micro-switch, or the piece of something that closes the vent cover in the event of rain or snow.

[Gerald]

Pretty sure it’s 12v dc as the coach is a Liberty Classic and as I understand all the house systems are 12v. The volt meter of my tester indicated 12v dc from the leads to the blind motor. The motor itself says 12 – 24v dc. I will pull the motor apart and clean the stator, commutators and rotar. If the windings are damaged I will rewind.

[Gerald]

IFS or lack is a deal killer??????????

Wrong, wrong, wrong.

Our coaches evolve. since we bought our first in 1990 we have seen a host of changes in both the chassis and conversions over the years and while there are some very substantial milestones in the evolution of the Prevost chassis, such as the change to the Series 60, to the change to 45 feet, to slides, etc. with the exception of the slightly better turn radius there is no advantage or disadvantage to having or not having IFS.

I had about 250,000 to 300,000 miles of drivng a Prevost conversion under my belt when I drove my first IFS equipped coach and if there is a difference in ride or handling except for the turn radius I couldn’t tell.

[Gerald]

Owned 3 Marathons in this order;

2005 XLll 2 slides by Prevost

2000 H3-45 no slides with OTR air

2007 H3-45 3 slides by Valid

Each bus I purchased probably # 1 thing was curb appeal. Then mechanical condition and / or overall reliability based on how the complete inspection played out.

General smell inside bus and the big question was pets. That’s a good one reading about so many bus owners with no pets and never been smoked in. Take your flash light, look under the refrigerator.

Bus mileage IMHO has little to do with buying a bus. Low mileage has issues and lots has been posted on this subject.

When I visited a bus my first impression always was noted on my work pad. Took flash light, legal pad, my own 26 page inspection list, camera.

Another was owners records or lack of. If there were none and I had interest then I spent as much time needed to have an opinion if the bus was a possibility.

Best advice …do your homework on the bus, nego a price and then it’s survey time.

AL

[Gerald]

Jim & Chris,

I run at least 5 psi over the Michelin chart for each axle (currently I am 10 psi over on the tag). Given the issues with the 365’s and suggestions I have heard on running a little more pressure in the tag I am upping the tag to 100 psi. The chart shows 85 for the tag based on weight.

[Gerald]

As to which one’s. The stateroom on both sides.

[Gerald]

Aren’t the blinds in your model controlled by Techlink switches?