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05-21-2021, 04:04 PM
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#1
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Senior Member
Join Date: Nov 2013
Posts: 290
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Rear air tank really high
My diesel pusher rear air tank has gone nuts and is now reading above the max of 150. The front tank is around 120. No idea what the hoses are rated at or what to do. Any help or advice would be appreciated. I’m just outside Amarillo Tx for the night.
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Bill Thompson
2006 Fleetwood Revolution 40 LE
2022 Jeep Cherokee Trailhawk
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05-21-2021, 04:07 PM
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#2
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Senior Member
Join Date: Oct 2014
Posts: 7,882
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Quote:
Originally Posted by Chiefly1
My diesel pusher rear air tank has gone nuts and is now reading above the max of 150. The front tank is around 120. No idea what the hoses are rated at or what to do. Any help or advice would be appreciated. I’m just outside Amarillo Tx for the night.
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Very high likelihood this is a gauge issue, not actual PSI issue.
What chassis? What year?
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Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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05-21-2021, 04:54 PM
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#3
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Senior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 3,480
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Quote:
Originally Posted by wolfe10
Very high likelihood this is a gauge issue, not actual PSI issue.
What chassis? What year?
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The sending unit can also be the culprit.
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2021 DSDP 4326 Freightliner
2023 Winnebago ERA 70A
2005 KSDP 3910 Spartan
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05-21-2021, 04:58 PM
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#4
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Senior Member
Join Date: Oct 2014
Posts: 7,882
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Quote:
Originally Posted by USMCRET
The sending unit can also be the culprit.
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Agreed. Or even a cold solder in a connection between them-- plagued a number of Freightliner chassis.
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Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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05-21-2021, 05:01 PM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,446
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There are relief valves in the air dryer and wet tank that are set for 150 PSI.
If the pressure was that high, It would be in both tanks and blowing off.
Most likely a electric issue.
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05-22-2021, 09:18 AM
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#6
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Senior Member
Join Date: Nov 2013
Posts: 290
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Quote:
Originally Posted by wolfe10
Very high likelihood this is a gauge issue, not actual PSI issue.
What chassis? What year?
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Spartan chassis 06 freer wood revolution.
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Bill Thompson
2006 Fleetwood Revolution 40 LE
2022 Jeep Cherokee Trailhawk
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05-22-2021, 08:27 PM
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#7
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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 Chiefly1
Spartan chassis 06 freer wood revolution.
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"freer wood"..... huh?
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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05-23-2021, 06:52 AM
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#8
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Apr 2015
Location: Dallas, TX area
Posts: 634
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The issue sounds like a air sending unit that has gone bad. There are two, front and rear. They are a ball looking object about the size of your fist, usually gold in color and have a air line on one side and an electrical plug , two wire, encased in a race-track shaped connector on the other side.
Find those and swap the electrical leads. If the problem follows the swap, the issue is with the air sending unit, it needs to be changed. They are available from Spartan, about $100. Or, from Summit Racing, online, for about $55. It is the 0-150# air sending unit with the Packard connection, the race track shaped thingy.
Look for the air sending unit under the front hood, although on your MH, they might be in another location. Be sure to label the connectors, front/rear, as it is easy to misplace where they belong.
Also, if it proves to be the air sending unit, it would be a good idea to replace the air dryer filter at the same time. It has been reported on this forum that a dirty air dryer filter might be contributing to a failed air sending unit.
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05-27-2021, 04:57 PM
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#9
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Senior Member
Join Date: Nov 2013
Posts: 290
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Fleetwood Revolution 2006. I really appreciate the help. It has been raining non stop but it is suppose to stop tomorrow and I’ll find and test what I can. The help is awesome and I thank you!
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Bill Thompson
2006 Fleetwood Revolution 40 LE
2022 Jeep Cherokee Trailhawk
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12-07-2021, 03:42 PM
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#10
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Senior Member
Join Date: Nov 2013
Posts: 290
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It was a faulty gauge. So once a replacement cluster gauge was found and I returned home and installed it the problem was solved. Thanks for the input and sorry for the delay.
__________________
Bill Thompson
2006 Fleetwood Revolution 40 LE
2022 Jeep Cherokee Trailhawk
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