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It's all about "downhill inertia" generated solely by the runaway affect of the tow dolly against the braking force of the towing vehicle.
inertia. [(i-nur-shuh)] In physics, the tendency for objects at rest to remain at rest, and for objects in uniform motion to continue in motion in a straight line, unless acted on by an outside force. (See Newton's laws of motion.)
Once the brakes are applied on the dolly, they will not back off unless the force between them is reversed...there is no spring in the actuator. I agree that the pressure will be relieved a good bit once you let off the MH brakes, but not totally until the pulling force by the MH is stronger than the drag affect of the dolly.
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Now an SOB
Traded Thor for Melbourne Prestige 24NP
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
Blondie passed in 2020 at 5 to Leukemia
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