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03-01-2016, 12:33 PM
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#1
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Sep 2015
Location: Southern Oregon
Posts: 143
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Servicing air dryer system
Does anyone know anything about removing and/or cleaning an air dryer system? Is it a spin-on filter?
Thank you
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Dale
2000 National Tradewinds 7370 37ft, CAT 3126B 330HP, Allison 3060-6sp Freightliner XC chassis, Ready Brute elite, 2013 Honda CRV 
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03-01-2016, 12:58 PM
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#2
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,889
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What is the name of your dryer? Right about the time your coach was made, the air dryer models changed. I have changed the Purest and the Pure Air ones.
One is a spin on and the other is a hold down type. One Pure Air you need to buy/or make a large filter wrench to unscrew the filter, but the Purest you just unscrew a few bolts and it lifts off.
On my coach I had to completely remove the dryer then change the internal parts because there just wasn't good working room.
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Good Luck, Be Safe and Above All, Don't Forget To Have Fun 
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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03-06-2016, 05:06 AM
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#3
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,889
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If you do have the spin on filter, then a quality strap or chain wrench should allow you to remove the filter. If memory serves me correctly, you get several parts in the kit. It's not hard to do. Just remember cleanliness is very important. Internal dirt and diesels don't mix. That's another reason I removed the whole thing and then refurbished the Pure Air Plus on my workbench. I bought the kit from NAPA Auto Parts.
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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03-20-2016, 03:41 PM
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#4
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Junior Member
Join Date: Jun 2015
Posts: 3
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Have a 2001 Tradewinds 39, Freightliner XC CAT 330
how did you make sure the system was completely discharged? I can't find a lanyard on the wet tank, or can u isolate the dryer by closing off valves and just bleeding the unit?
any input would be helpful Thanks
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03-20-2016, 03:47 PM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,417
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The dryer discharges every time it purges. It holds no pressure after that.
You can just pump the brake pedal to exhaust the air from the system.
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03-20-2016, 04:42 PM
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#6
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Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,889
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Like Twinboat said, I just pump the brake peddle till the gauges read zero.
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
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