[Chas]

thanks Tom! I’m not sure what happened I only typed it once! Lol

[Archived]

I have slowly found most of my Aux air leaks.

1. Both mini air bags on engine fan (Replaced)

2. Several connectors in engine area that feed mini air bags.

3. All the push on fittings on generator air bags and both fittings on presure guage for generator air bags.

4. all the fittings that feed air to the toilet.

As of now I am losing less then .5 pound of air per hour. Still chasing smaller and smaller leaks.

Item 1 and item 3 above seem to fix the worst of the leaks. Replacing all push on fittings with DOT compression fittings as I find each leak. At some point I hope to replace all the push on fittings, it will just take time.

Next thing to do is put a ball valve in the line that feeds the step well cover and driver seat and see if that helps.

[Archived]

Andre,

You are listing what we see frequently reported on the forums about the location of leaks. Clearly the circuit associated with belt tensioning is near the top of almost every list.

Check the pressure regulator for the belt tensioners. Usually tightening all the bolts around the base resolves leaking there, but if not a new one might be required if it is leaking. Another source might be the valve that exhausts air so you can change belts. If you don’t have a check valve at that system it wouldn’t hurt.

I don’t know how Royale set up your coach, but on my XL there is a valve and some fittings at the wall on the left hand side of the little compartment behind the tag axle, passenger side. I found a lot of leaks there. That is fed from the aux system at the front of the coach and supplies air to the belt bellows, the retarder, and in later models the EGR system on the engine. If you cannot easily get at that to check the valves and regulator, you might consider adding a solenoid valve at the line where it originates in the front that is open only when the key is on.Later model XLII coaches have Prevost installed solenoid valves to shut off air circuits not in use when the engine is off.

[Alvie]

Jon,

Thanks,

Some of the things you mentioned I have fixed in the past. The valve that releases the belts has been replaced. The fittings behind the right rear tag axle have been checked and 1 replaced. The pressure regulater needs to be checked again. It did leak in the past and tighting the bolts did fix that leak. I do need to recheck that one.

I will get to the point where the leaks are so small I might just live with it. It would be nice to have a 100% leak free Aux air system, but the time involved in getting to that point may not be worth it right now. Still workig for a pay check and that comes 1st.

[Andre]

Andre,

Paycheck. What is that?

[Kenneth]

Tom,

Long answer:

A paycheck is what us poor working stiffs get for working 40 to 60 hours a week on a job that we may or may not like, to receive 40% of our gross pay so the other 60% can go to various gov’t agencies who then give back a small portion of that money to people who have managed to retire before the gov’t goes broke.

I.E. I work so you retired guys can get a SS check!

Then the little that I get to keep is used to fix the air leaks in the bus in the hope that one day I to can retire and travel and collect back a little of that money that I have contributed to the gov’t for the last 46 years.

SHORT ANSWER:

A 4 letter word I wish I did not have to use.

[Archived]

Andre,

It’s a great adventure chasing air leaks. I worked about a month straight on my AUX air system with soapy water and an $400 hand held leak detector.

I’am at the point of AUX air compressor cycle when bus is sitting in bus barn once in 5 days.

My last major leak was found in the air toilet with the help of Mfg. I would suggest running a separate air line to the to isolate that system. The air was leaking into the hoper, undetectable with the flapper closed.

If that holds solid then you can spend time else where. That leak was small but steady.

I used a small compressor for desired PSI.

[Archived]

Those of us collecting social security and getting Medicare would like to thank all of you who are working hard to keep the system financially sound.

Will the last one working and paying taxes please remember to turn out the lights when you quit.