Believe it raises the trailer air bags higher than normal. Those trailers sit really low to the ground and get hung up easily. Hit the overlift to clear bumps
No one knows this all..?
Discussion in 'Experienced Truckers' Advice' started by ZooX, Mar 5, 2020.
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Double hydraulic trailers
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We have two separate height control valves, and that line switches an air valve to allow the higher of the two to control ride height. There's also a quick release to rapidly dump the air back down to normal height. It's usually on both the truck and trailer, and gets
us 5-6 inches of extra ground clearance. -
There’s a junk yard around the corner from our terminal that trucks like yours are in and out of, and these guys are ALWAYS getting hung up. I wish they’d learn to use that “overlift”. Traffic becomes a nightmare through there when that happens.
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A lot of cheap ##### won't pay for it or keep it working. Side rails last much longer with it working, too.MACK E-6 Thanks this.
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