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Open Roads Forum  >  Class A Motorhomes  >  All

 > Loss of rear air pressure

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captron33

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Posted: 02/08/21 10:18pm Link  |  Quote  |  Print  |  Notify Moderator

Started motorhome in storage both air systems came up to normal pressure for a few minutes then the rear started to decrease , red light came on an warning horn started buzzing. Cannot locate an air leak . Any guesses what might cause this,
. All air bags fully inflated. Could it be a stuck dryer valve. .?? Where to start looking??
2006 travel supreme, cummins 400 isl.

JRscooby

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Posted: 02/09/21 04:23am Link  |  Quote  |  Print  |  Notify Moderator

Most times the air dry is ahead of all systems, so that is not likely. Pressure came up, then went away says you used the air, or it leaked. How cold is it?

Tyler0215

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Posted: 02/09/21 08:06am Link  |  Quote  |  Print  |  Notify Moderator

Well you have a leak somewhere. Could be ice in the lines. Did you warm up to operating temp. It may take several times to air up and bleed off to clear the air lines.

MountainAir05

New Mexico

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Posted: 02/09/21 08:32am Link  |  Quote  |  Print  |  Notify Moderator

http://constructionpaletizedsystems.tpub.com/TM-9-2320-364-20-2/css/TM-9-2320-364-20-2_965.htm


If yours then check the top RH corner and print it out.

captron33

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Posted: 02/09/21 08:21pm Link  |  Quote  |  Print  |  Notify Moderator

It was cold but not close to freezing. Yes it got up to operating temp.

captron33

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Posted: 02/09/21 08:22pm Link  |  Quote  |  Print  |  Notify Moderator

Not sure what mountianair 05 is saying.

Stim

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Posted: 02/09/21 09:55pm Link  |  Quote  |  Print  |  Notify Moderator

Possible problem with leveling valve. ???
Could linkage have come loose while down?
Valve dirty, some how stopped up?

JRscooby

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Posted: 02/10/21 05:14am Link  |  Quote  |  Print  |  Notify Moderator

captron33 wrote:

It was cold but not close to freezing. Yes it got up to operating temp.


Not close to freezing? Moist air rushing thru a small hole in a valve can drop temp to form ice.
When was the last time the tanks where drained to remove water?

captron33

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Posted: 02/23/21 09:21pm Link  |  Quote  |  Print  |  Notify Moderator

Tried running and shutting off engine several times, no help. Still inflates all air bags but rear pressure gauge stays near zero.

wolfe10

Texas

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Posted: 02/24/21 07:28am Link  |  Quote  |  Print  |  Notify Moderator

Gauge issue?

If it goes to zero, open the drain valve on each tank. If PSI, start looking for a sender/gauge issue.


Brett Wolfe
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Ex: 1997 Safari 35'
Ex: 1993 Foretravel U240

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