We run a 2005 tri axle Mack dump truck and I'm looking to settle a disagreement between driver's about what PSI the lift axle should be set at. The truck spends more time on the highway than off road.
Thanks
Lift axle PSI in tri axle Mack
Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by wall_404, Apr 22, 2015.
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a lift axle that has 4 tires should have the air pressure set so that it carriers the same weight as each drive axle,,when on a job site or place where a very tight turn is required the air on the lift should be dumped , remember when you dump the air on a lift all the weight will then be shifted to the drive axles and the steer,, for safety air pressure should be equalized so that the braking is effective on all axles,
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Thanks 315wheelbase!
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Isn't there some sort of mathematical calculation for that? Like 1or 2 psi per pound of payload?
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depends on the axle. the path they follow means its not a linear PSI-ground pressure graph. I had a copy of the one for the Hendrickson Lift in the mack i used to drive. 50 PSI was 9000kg on the ground.
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