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Old 04-13-2019, 04:01 AM   #1
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Thumbs down Air Tank

Is there is an air holding tank for the air brake system? Also think there should be a water drain valve in it. Anyone know where it might be in our older coach.


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Old 04-13-2019, 04:13 AM   #2
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There are 2 or 3 air tanks up front. There should also be some drain cables in the wheel wells you pull to drain the water. There is also a desiccant Air Dryer filter that needs to be serviced every so many miles depending on what dryer you have
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Old 04-13-2019, 09:03 AM   #3
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There are usually two tanks for the brakes. One controls the rear brakes and one controls the front. The "air dryer" cart should be changed out at about the 3 years range, if my memory is right. When you change the dryer, also thing about changing the "auto purge valve" which is located under the dryer. There are drain lanyards for each tank. They are usually up front, about where the wheels are, and located near the center rails. Most of them are color coded to let you know what they drain. Call Newmar support and they may be more specific...
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Old 04-13-2019, 01:39 PM   #4
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Sometimes ; repeat sometimes ; the lanyards for the air tank drains are visible over the RF wheel and can be pulled with the awning rod.
Mine were not , I was the third owner of this coach and they were still coiled up on top of the tanks , where they were when the chassis left Freightliner.
Coach was eleven years old at the time and the tanks had never been drained, I had to crawl under with the gen set rolled out to access and route the lanyards.

Here's some info from F/L on your air dryer servicing, and an air system diagram for my 99 chassis , your's being newer may be slightly different , if it appears to be different , contact F/L and have them send you one for your coach .
Attached Files
File Type: pdf Air Dryer Maintenance web version.pdf (161.5 KB, 14 views)
File Type: pdf Freightliner air brake diagram.pdf (312.3 KB, 15 views)
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Old 04-13-2019, 01:44 PM   #5
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Ahhh, the smell of fresh 11yr old air tank drains !!


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Old 04-13-2019, 02:10 PM   #6
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Quote:
Originally Posted by Skip426 View Post

Here's some info from F/L on your air dryer servicing, and an air system diagram for my 99 chassis , your's being newer may be slightly different , if it appears to be different , contact F/L and have them send you one for your coach .

Thanks for the PDF files....


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Old 04-13-2019, 10:47 PM   #7
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There should be a total of 3 lanyards up front, 2 on one side and one on the other. On my 2012 XCL (Winnebago) they were routed through the frame rail, they exit the frame rail through a small hole / grommet. It is up to the particular coach builder as to how they do it, but should still be somewhere underneath, up front.
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Old 04-14-2019, 04:30 AM   #8
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Air Tank

Thanks all-guess I have to go searching now.



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Old 04-15-2019, 04:43 PM   #9
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There are three tanks, but you will only find 2. One is divided internally into two sections. Follow the lanyards.
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