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08-02-2020, 12:29 AM
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#1
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Senior Member
Join Date: Jan 2013
Posts: 228
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Bleeding the moisture on a Class A Diesel Pusher
Hello Friends! A quick question? When you bleed the moisture from the air lines on a diesel pusher by pulling the loop wire that is usually somewhere by the front wheels is this done while the engines is running or with the engine off?? Thank You!!
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08-02-2020, 06:11 AM
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#2
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Senior Member
Join Date: Jul 2014
Posts: 35,444
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Engine off is the normal way.
Watch that the suspension doesn't drop on your body while draining. Use an awning hook or something.
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08-02-2020, 06:16 AM
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#3
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Senior Member
Join Date: Feb 2020
Location: NY State
Posts: 3,088
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Quote:
Originally Posted by Grandcanyon
Hello Friends! A quick question? When you bleed the moisture from the air lines on a diesel pusher by pulling the loop wire that is usually somewhere by the front wheels is this done while the engines is running or with the engine off?? Thank You!!
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I don't think it matters as long as there's pressure in the tanks. But if that's wrong I'd sure want to know why, since I usually bleed them engine off!
__________________
John
1976 Southwind 28', '96 Winnie 34WK,
2006 Tiffin Allegro Bus 40QDP
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08-02-2020, 05:04 PM
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#4
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Oct 2010
Location: Lake Havasu City, AZ
Posts: 1,717
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On my coach, draining moisture from the tanks does not affect the air suspension. The airbags have a solenoid valve that retains the air in each bag until the leveling system calls for a change. Engine running or not makes no difference either. I usually drain the tanks with the engine off only because I have no reason for it to be running.
__________________
2019 Newmar Dutch Star 4328 K2
2017 Grand Cherokee Summit 5.7
2008 Beaver Contessa 40' Pacifica 425 Cat
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08-02-2020, 05:50 PM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,444
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Quote:
Originally Posted by tankcj
On my coach, draining moisture from the tanks does not affect the air suspension. The airbags have a solenoid valve that retains the air in each bag until the leveling system calls for a change. Engine running or not makes no difference either. I usually drain the tanks with the engine off only because I have no reason for it to be running.
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Solenoids are for dumping the suspension before using levelers.
Ride height valves are active all of the time. If there is a leak in the ride height system, the chassis will sink if the system pressures drop below what the bags need to maintain that height.
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08-02-2020, 07:15 PM
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#6
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Senior Member
Join Date: Oct 2008
Location: Marshfield, WI
Posts: 719
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Just remember, there's usually 3 drain valves with loops in the front of the rig.
Sometimes it takes some detective work to find all 3.
__________________
Denny, Connie & Shadow (former barn cat made good)
2006 Tiffin Phaeton, Cat C7, Freightliner Chassis
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08-02-2020, 07:27 PM
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#7
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Senior Member
Join Date: Oct 2002
Location: Madison, MS
Posts: 10,527
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Assuming your chassis has a properly functioning air dryer (filter) you should not see much, if any, moisture being expelled. Holding each “spitter” open until all the air escapes isn’t necessary. IF there is moisture accumulation in the tank it will be blow out almost immediately because water is heavier than air and the drain should be on the bottom of each tank
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08-02-2020, 07:46 PM
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#8
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Oct 2010
Location: Lake Havasu City, AZ
Posts: 1,717
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Quote:
Originally Posted by twinboat
Solenoids are for dumping the suspension before using levelers.
Ride height valves are active all of the time. If there is a leak in the ride height system, the chassis will sink if the system pressures drop below what the bags need to maintain that height.
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My bad...thanks for the correction.
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2019 Newmar Dutch Star 4328 K2
2017 Grand Cherokee Summit 5.7
2008 Beaver Contessa 40' Pacifica 425 Cat
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08-02-2020, 08:41 PM
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#9
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Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 9,941
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Quote:
Originally Posted by edgray
Assuming your chassis has a properly functioning air dryer (filter) you should not see much, if any, moisture being expelled. Holding each “spitter” open until all the air escapes isn’t necessary. IF there is moisture accumulation in the tank it will be blow out almost immediately because water is heavier than air and the drain should be on the bottom of each tank
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+
Yep,
In the nine years and over 53,000 miles we've put on our '04 Itasca Horizon 36GD with the CAT C-7 330HP, the few times I've actually pulled on those drain cables, which has been oh, maybe a dozen times, has revealed absolutely ZERO water/moisture, EACH and every time. But, that doesn't mean one shouldn't check every now and then, just because you haven't found any water/moisture in years.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '20 Honda NC750X DCT
2018 Goldwing Tour DCT Airbag
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Heidi character, (mini Schnauzer)!
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08-03-2020, 09:49 AM
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#10
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Senior Member
Join Date: Nov 2012
Location: bis. nd
Posts: 1,124
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edgray is right . ive only changed my dryers once ..
__________________
2007 Alfa Gold!! model 1008. 400hp Freightliner, IFS!!
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08-04-2020, 12:34 AM
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#11
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Senior Member
Join Date: Jan 2013
Posts: 228
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Thanks for all of your fast replies!!! I appreciated!!!
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