This video highlights a known issue with Hendrickson's TIREMAAX PRO hubcaps that causes air to leak from the controller after the parking brake has been set.
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@cameronimmel34487 ай бұрын
I have a very similar problem except mine leaks out of the backside of the prm body when the trailer brakes are not set. Supply valve closed, brakes disengaged and leaking out the backside of the prm
@fleetrepairsolutions63726 ай бұрын
Check the tire pressure at a few positions and see if the pressure is over the target pressure listed on the controller. The pressure relief module is designed to let air out of the tires is pressure is 10 psi over target. If you tire pressure is high, the PRM is doing it's job. But if tire pressure is normal I would suspect the PRM itself is bad, or the inflation/deflations pressures are set incorrectly, causing the system to constantly add, then relieve air pressure.