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Tires, Wheels, Brakes, Steering and Suspensions Discussion of preventative/corrective maintenance and other technical issues regarding your coach's Tires, Wheels, Brakes, Steering and Suspensions and related components.

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  #1  
Old 12-29-2017
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shaaksma shaaksma is offline
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Default Bus won't air up past 65

Massive air leak sounds like it's coming from drv front corner. From under the bus, it sounds like it's from the battery box? I replaced seals in CC5, shot is with soapy water, no bubbles.


There is a 2"-3" deep cover on back side of chassis battery box. Before I tear it apart, are there any airlines inside, directly behind the batteries?

Thanks in advance.
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Old 12-29-2017
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Quote:
Originally Posted by birds_first View Post
Your air governor should be on the frame rail behind the battery box, lie down on the ground & crawl under there and you should see it. Take pictures, remove the lines, set your new governor beside the old and replumb the new as the old one. Easy to do, also easy also to screw up. Good luck. Also check the bottom half of the braided hose from the compressor to the governor while you're there.

Sorry other side of the bus. I replaced the governor a couple months ago. The air is howling on shop air.
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Old 12-29-2017
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Quote:
Originally Posted by shaaksma View Post
Massive air leak sounds like it's coming from drv front corner. From under the bus, it sounds like it's from the battery box? I replaced seals in CC5, shot is with soapy water, no bubbles.


There is a 2"-3" deep cover on back side of chassis battery box. Before I tear it apart, are there any airlines inside, directly behind the batteries?

Thanks in advance.
There is a Pressure Protection Valve in that area that may be leaking down. Check up behind the bumper and on the frame rail.
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Old 12-29-2017
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Air was coming out the top of this thing. Blocked the air and it sealed. Replace it? And what is it?
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Old 12-29-2017
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Additional pics to show how clean and original my bus is (in the only 12” X 14” space hidden behind a sheet metal cover!)
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Old 12-29-2017
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Quote:
Originally Posted by birds_first View Post
There is a Pressure Protection Valve in that area that may be leaking down. Check up behind the bumper and on the frame rail.
Thanks John. I don't think its a PPV, it doesn't look like the one in post #5 of following thread:

http://www.wanderlodgeownersgroup.co...ead.php?t=6333
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Old 12-29-2017
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Looks like a Bendix pressure reducing valve.
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Quote:
Originally Posted by morganaire View Post
Looks like a Bendix pressure reducing valve.
Your post from Feb '17 mentions Bendix RV1 #241858 with 1 supply and one exhaust port. The one in question has 2 exhaust ports. Is it the RV 3?

Did you replace the seal in yours or the unit?

Thanks
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Not sure about the model you have, but I do recall seeing 2 vs 3 port versions during my looking. I haven't replaced the valve yet - but it's on my short list. My only symptom is it being slow to build initial pressure. It holds pressure fine. Sorry I can't be more helpful!
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Old 12-29-2017
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Found it. Called a TR-3. Instructions say to mount with rubber exhaust seal facing downward. It's upside down in the schematics and upside down on my bus.

http://www.wanderlodgeownersgroup.co...nual_Parts.pdf
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