| Author |
Message |
Gus Causbie (Gusc)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 06, 2006 - 9:35 pm: | |
Am I right here? Shouldn't there be no air available at the compressor muffler drain when the engine is off? Isn't this just to drain water while the engine is running?
I added a fitting to the muffler drain so I could easily reach the air system with my shop air and finally it dawned on me that there probably should be no air coming out of this fitting! |
Geoff (Geoff)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 07, 2006 - 8:50 am: | |
What is a "compressor muffler drain"? Do you mean the air dryer? I don't think that is a good spot. You need to hook up an air chuck off a line that runs to the main air tank-- the one that runs back to the air compressor governor is a convenient one to get to at the engine compartment.
--Geoff
'82 RTS AZ |
David Hartley (Drdave)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 07, 2006 - 4:31 pm: | |
He's probably got one of the old style oil-trap drains. My scenicruiser had one in the main line after the compressor. It had a valve and air chuck fitting on it.
The old coaches normally just had an oil trap and tank drains. No drier and fancy stuff like the 80's vintage and up.
Many transits were equipped with driers and many were not. It depended on who ordered and how much money that had to spend. My 83 RTS from Delaware didn't have one but my 83 Flx 870 from Tampa did.
an 80 model Flyer I worked on once had one and it was from Daytona. |
Buswarrior (Buswarrior)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 07, 2006 - 8:54 pm: | |
Hello Gus.
Please tell us a little more about this thing you call a muffler drain, what bus and vintage.
If it helps....
My 1975 MC8 has a "Drain Daily" fitting in the engine room, and is factory equipped with a Bendix air dryer up under the front.
I re-fitted the "Drain Daily" with a regular shop hose male disconnect and quarter turn valve for using an external compressor to supply air.
Used as intended for a drain, I will only get pressurized air (and a little goopy residue) out of this fitting if the engine driven air compressor is cut-in. If the air dryer has purged, there is no pressure in this line between the compressor and the air dryer.
It works great for filling the air system with an external compressor.
happy coaching!
buswarrior |
Gus Causbie (Gusc)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 07, 2006 - 11:11 pm: | |
'54 PD4104.
All air compressors and a/c compressors have a muffler the first thing out of the compressor to muffle the "ping" of the reciprocating piston. I didn't invent this name, it is listed as such in the manual and is original. It is in the engine compartment.
There is a drain at the bottom of the muffler which is the first thing to drain in any air system. I have no dryer, the system is original.
I air the bus from shop air at this point, simple and makes the whole system work as usual. Same arrangement as described by Buswarrior.
My question was, shouldn't there be no air available at this point when the engine is off?
I think Buswarrior answered my question; "I will only get pressurized air (and a little goopy residue) out of this fitting if the engine driven air compressor is cut-in."
Thanks to all. Now I need to remove that huge check valve and find out why it isn't working.
. |