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Author Topic: Air Discharge Hose  (Read 915 times)
travlinman
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« on: November 25, 2011, 03:09:15 PM »

Hey Guys,

So I went ahead and removed my Air Discharge Hose to check for excessive oil from my compressor. The inside of the hose looks fine, but the hose itself is really old and stiff. I think I will go ahead and replace it while it is off. Now the question is where do I get one of these or are they all custom made??  Here are a couple of pics...

TM

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Steve & Kristen Full time nomads since '06 - PD4106-674  8V71/V730
roadrunnertex
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« Reply #1 on: November 25, 2011, 03:27:01 PM »

Time to call Luke at US Coach Parts  Grin
888-262-2434
Ask for Luke. Grin
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Bill B /bus
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« Reply #2 on: November 26, 2011, 04:11:07 PM »

That metal is stiff. Does it leak? If not put it back where you found it.
Metal hose is there to reject the heat of compression so that the compressed air is cooled before entering the drier.

Bill
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Bill & Lynn
MCI102A3, Series 50 w/HT70
TedsBUSted
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« Reply #3 on: November 26, 2011, 06:00:58 PM »

That's a common stainless reinforced compressor discharge hose.
In-stock Teflon piece at practically any truck parts.
Probably under $50 retail. IF you decide to replace it now.

Ted
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Bus polygamist. Always room for another, especially 04 or 06 are welcome. NE from Chicago, across the pond.
travlinman
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« Reply #4 on: November 26, 2011, 06:44:19 PM »

Hey guy thanks for the replies...

Tex - I have given Luke a fair amount of business this year but for this item I would prefer to but it locally as I am on the left coast.

Bill - The hose is what I would call crispy, it is so stiff I cannot even bend it and the metal braiding is split in many spots making it a bit hard to handle. To me it is a drama waiting to happen. I'm leaning towards getting a new one as I hate to put worn out parts back on.

Ted - Thanks for the info, I've got 3 truck supply houses nearby so I will be hitting them up on monday.

TM
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Steve & Kristen Full time nomads since '06 - PD4106-674  8V71/V730
Oonrahnjay
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« Reply #5 on: November 26, 2011, 07:22:10 PM »

  (snip)  The hose is what I would call crispy, it is so stiff I cannot even bend it and the metal braiding is split in many spots (snip)

     T-man, my bus is different from most of what the rest of you have in almost every detail but mine has a metal pipe for about 12 feet from the compressor to the "oil condensor" (no air dryer) and then another 6' metal pipe over to the unloader valve (no governor on mine).  The pipe at the compressor has a corrugated "radiator" cooling fin flange for the first 6 feet or so.  I can't imagine a pipe that will get "crispy" and I can't imagine metal braiding (unless you're calling braiding what I'm calling corrugated fins).  Is there any chance in it's past, someone has replaced the original factory pipe with one that's not as good -- and now you're paying the price for it as it deteriorated?

     I'd check to see what the factory original was like and be sure that your replacement is like it.
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Bruce H; Wallace (near Wilmington) NC
1976 Daimler (British) Double-Decker Bus; 34' long
6-cyl, 4-stroke, Leyland O-680 engine

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luvrbus
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« Reply #6 on: November 26, 2011, 07:46:56 PM »

Teflon or Silicone hose with the s/s shield is pretty much the norm like Ted described you are supposed to keep the discharge air temperatures under 400 degrees.

When you have a leaky system the compressor works outside the 25% duty cycle where it was design to operate the air gets hotter and will make a hose well done and crispy


good luck 
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Life is short drink the good wine first
travlinman
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« Reply #7 on: November 26, 2011, 09:11:59 PM »

Clifford - I think you nailed the reason for my crispy hose. When I bought this bus it had a lot of air leaks. The PO was a run it till it drops kind of guy. The compressor ran nearly continuously to keep up. After a lot of PM I have it down to where I wonder if I am using any air at all and then I hear the purge valve open just to remind me that the system still works.

TM
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Steve & Kristen Full time nomads since '06 - PD4106-674  8V71/V730
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