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<p>[QUOTE=&quot;mechman, post: 11680765, member: 326108&quot;]I have a 2001 Volvo that rises to ride height just fine with an unloaded trailer. As soon as I load it I&#039;m riding on my fenders. I drained any water out of the tanks and replaced the air dryer unit while it was in the shop as well as the air levelling valve. Nothing seems to work. I removed the dump signal air line to the levelling valve and there is no air coming to it so the dump valve isn&#039;t the issue. Even with the tires riding on the fenders the air bags are still hard but just not enough pressure to lift with load. Is there a priority valve or something I&#039;m missing that would cause the levelling valve to not receive full tank pressure? Thanks[/QUOTE]</p><p><br /></p>

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