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Old 11-02-2013, 11:45 AM   #1
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Country Coach Owners Club
Join Date: Jan 2006
Location: Redding
Posts: 3,525
Bendix AD-4 Air Dryer Cartridge Replacement

Has anyone replaced this cartridge on a DIY basis?

It seems that one could buy a complete AD-9 for about $200 or a new AD-4 cartridge for about $50.

But, without a pit to operate from, access to my AD-4 Dryer would be tough with all the air removed from the suspension and the six wheels on 2x12 ramps about 6" high.

I suspect I need to dismount the entire dryer to change the cartridge?

Are there any tricks to this procedure that would help me DIY this maintenance?

1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
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Old 11-03-2013, 05:43 PM   #2
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Join Date: Sep 2009
Location: Titusville
Posts: 249
Not sure how and where yours is installed but on my Winnebago UA, I used the hydraulics to jack the rear up then installed jack stands for safety. The dryer cartridge was very easy to replace. Once I got under there and studied it a little everything came apart and replaced nicely. If I remember right I did not have to dismount the dryer but it has been a while. Make sure you bleed the air!

Tim & Paula - Titusville, Florida
2015 Jayco Pinnacle 36FTBS
2011 Chevy 3500 Duramax with Air Ride Hitch
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Old 11-03-2013, 07:34 PM   #3
Join Date: Sep 2012
Posts: 43
air dryer

I have a 2001 Beaver Contessa and did the servicing on my air dryer myself.

I drained all the air from the system and stlii had enough room to lay under rear of coach and remove the filter and small inner coalescent to change, kit had a new valve for the bottom where air releases too...

took about 45 minutes to do it all. I just loosened bolts and tilted canister enough to get a grip on filter to loosen it.
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replace, replacement

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