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 on: March 21, 2018, 11:37:19 AM 
Started by busfan - Last post by buswarrior
What is the product's proper name?

Search for an MSDS for it?

Happy coaching!

 on: March 21, 2018, 11:30:29 AM 
Started by NewbeeMC9 - Last post by buswarrior
Most air compressors intake is plumbed from the engine air filter in our coaches. Some older or medium duty, or retrofitted, there should be a stand alone filter.

The compressor is a source of contaminants, but that normally drops out mostly in the wet tank, if an air dryer is absent. The air dryer normally captures contaminants. Through neglect, as each loads beyond capacity, the contaminants can get inhaled/pushed deeper into the system.

The PPV - pressure protection valve, via its spring internals, blocks air from filling less important parts of the system, until the brake tanks are up to the setting, then the air pushes past to fill the rest. They usually fail by letting air in before they should, not by obstructing the flo

It is safe to say that every air problem a busnut experiences is due to delayed parts replacement and neglect. Working through the air system in a methodical fashion to catch up the neglectof previous owners is a HUGE contribution to coach reliability.

And keeping the system properly dry, 365 days a year, winter freeze up won't happen.

Happy coaching!

 on: March 21, 2018, 11:12:43 AM 
Started by NewbeeMC9 - Last post by Jim Eh.
The E filter is a long way into the system, the contaminants and moisture would normally be left behind by the time the air gets here.

They didn't cause any grief.

That's why they were/are mostly ignored.

happy coaching!

Since it is basically a "closed" system, would it not be suitable enough to filter the compressor inlet air properly and then even the compressor would have "clean" air to work with as well, as all the valves downstream, in the first place?

 on: March 21, 2018, 11:09:02 AM 
Started by busfan - Last post by Jim Eh.
For a sealant I would like to throw my favorite in the hat. It even seems to be available at Wally World.


I would suggest a good mono bolt like ones from Avdel or equivalent

I would not (like has been said) ever use the common "POP" brand pop rivets or sheet metal screws.

Buck rivets take a certain "feel" from both sides to do them correctly. Takes a bit of team practice.

 on: March 21, 2018, 10:58:16 AM 
Started by Jim Eh. - Last post by Jim Eh.
But isn't it more fun that way?

Our 4106 had the Webasto and the generator both drinking from the same straw. Never a problem until I had a case of user-induced failure.

 on: March 21, 2018, 10:49:04 AM 
Started by luvrbus - Last post by Jim Eh.
Might be a good practise to check the mfg date BEFORE you buy

 on: March 21, 2018, 10:07:51 AM 
Started by chessie4905 - Last post by chessie4905
There are 3 or 4 VR731's on Ebay. One is claimed to be new???

 on: March 21, 2018, 10:05:42 AM 
Started by busfan - Last post by chessie4905
On solid rivets you buck, there should be as much rivet thickness on the bucking end when done, to equal head thickness. Thickness of both pieces of metal, plus 3/16 to 1/4 inch.For exact, you can google the question, and also some rivet catalogs give that information in front pages. I bought my rivets from Blyler rivets. But they were shave head bulb tight with sealing o-ring. When done, they looked like a factory solid rivet. Used a Harbor Freight air operated rivet gun. These rivets were somewhat pricey and overkill for your job.

 on: March 21, 2018, 09:53:03 AM 
Started by luvrbus - Last post by chessie4905
When I bought a 4905 about 20 years ago, not my current ride, it had Firestone lease tires on it. They are only just now starting to develop cracks, with no treatment. Sets out in the weather all the time. Parts bus. If manufacturers want sidewalls not to crack, they can use better mix in tires, although it may effect mileage to tread wear out?Huh
Probably not an issue for truck tires as they get replaced every couple of years.

 on: March 21, 2018, 09:50:16 AM 
Started by ArtGill - Last post by luvrbus
I looked it up for you the NJT model 20 Eagles with the DDEC used a TV7511 with a A/R of 108, T6 is a Borg/Warner replacement for the Garrett TV7511 

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