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Author Topic: Eagle Experts: Model 01 Brake issue "update"  (Read 2858 times)
wildbob24
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« Reply #15 on: June 12, 2010, 09:07:47 AM »

Paul,

No PP2 valve on this bus. The treadle valve looks like the one in your picture, but there are only two lines connected to it. A supply and a delivery.

I agree that a spring brake conversion should be in this bus's future, especially since it has no parking brake at all. Right now, we're just focused on getting it moved from the previous owner's property to the new owner's property.

Bob
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P8M4905A-1308, 8V71 w/V730
Custom Coach Conversion
Duluth, GA
wildbob24
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« Reply #16 on: June 12, 2010, 09:22:26 AM »

BW,

That's what I'm leaning toward, based on my GM experience. Makes the most sense to me.

We looked up under the front and couldn't see anything but pipes, but we'll have to go back and look harder to find that check valve.

Thanks,

Bob
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P8M4905A-1308, 8V71 w/V730
Custom Coach Conversion
Duluth, GA
Len Silva
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« Reply #17 on: June 12, 2010, 09:33:38 AM »

FWIW, I have a 4104 maintenance manual here:  http://manuals.lenstudio.com/GM_PD4104MaintX-5818.pdf

Scroll down to Section 4 for an air brake schematic, might give some help.
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wildbob24
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« Reply #18 on: June 12, 2010, 09:57:20 AM »

Len,

Thanks for the suggestion and link. I have a 4104 manual in my library and didn't think to consult it.

If the eagle plumbing is the same (and I believe it is), then the double check valve between the treadle valve and the ICC valve must be the culprit.

Now all we have to do is locate it.

Thanks,

Bob
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P8M4905A-1308, 8V71 w/V730
Custom Coach Conversion
Duluth, GA
wildbob24
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« Reply #19 on: June 19, 2010, 09:22:40 PM »

To update this thread:

This morning, after much moaning and gnashing of teeth, we located the double check valve. It's up under the center of the bus in the space just forward of the first bay bulkhead.

We removed it and sure enough it was stuck. Cleaned it up and reinstalled it but we couldn't test it because the batteries were dead and we were unable to build any air pressure. I feel confident this was the source of the problem.

I appreciate all the help and suggestions.

Bob
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P8M4905A-1308, 8V71 w/V730
Custom Coach Conversion
Duluth, GA
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