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Old 11-01-2018, 07:40 AM   #1
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Air dump solenoid doesn't close

The rig: 2008 Damon Tuscany on the FL XC chassis, Cummins ISC 360, LCI hydraulic leveling system.

The LCI pump motor is faulty and I have ordered a replacement part. The jacks are retracted. The control pad behaves normally and I have no reason to suspect the controller. However, the "jacks down" light is on and the air dump valve is open which is preventing the accumulation of air pressure for the suspension and brakes. I need to figure out how to close that valve.

Have you seen this situation before? Is there a workaround to trigger that valve to close?

thanks.
Paul
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Old 11-01-2018, 09:33 AM   #2
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Good day pmpurcell,
Yes, I have experienced this problem on my previous 2010 Newmar. In my case, the dump valve is located near or on the front axle. It is operated by a 12 volt signal to open or close. You may be lucky by just "tapping it" with a hammer to get it moving.

This looks like a "classic case" of having moisture in the air system. Have you had the Air Dryer filter replaced? If not, it would be prudent to replace it. Also, do you release the air from the system using the lanyards? Good preventive maintenance item to perform periodically.
Although you may be able to temporarily get it going with a tap, I would recommend replacing it. Contact Freightliner for the part, as each frame uses a particular part number.
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Old 11-01-2018, 10:35 AM   #3
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Although I am due for the air dryer service, I pull the lanyards regularly. The PO may not have been so diligent. Thank you. I'll try this. My local FL dealer has the part in stock.

Thanks.
P
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Old 11-01-2018, 02:41 PM   #4
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Quote:
Originally Posted by pmpurcell View Post
However, the "jacks down" light is on and the air dump valve is open which is preventing the accumulation of air pressure for the suspension and brakes. I need to figure out how to close that valve.
Have you seen this situation before? Is there a workaround to trigger that valve to close?
Here's a workaround that has worked for me the couple of times my dump valve stuck. Put the engine in high idle with the cruise control to build air pressure faster. The valve seems to need at least 75psi to close. Cycle the suspension dump and raise valve or switch several times. I don't know hos your suspension is controlled, but you should have a dump/raise switch or store/travel button. Switching that back and forth a few times freed mine up.
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Old 11-02-2018, 03:25 PM   #5
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Hereís the little bugger. There are two red buttons; one on each end. The left button, Iím told by FL opens the valve to dump air and the right button closes to fill. To test that, I need to be under the rig while it running. Yeah, about that...

Iím picking up the new part to replace the malfunctioning part. So that sliding under while itís running thing is a non-issue.

Thanks for the help. If youíre in South Texas next week, Iím buying.

P
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Old 11-03-2018, 06:07 PM   #6
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Problem solved. Thanks, guys.
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