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Difference Between Dexter 3500 lb and 4400 lb Brake Assemblies  

Updated 08/05/2020 | Published 08/04/2020

Question:

Is it safe to say that the only difference between the 23-468-469 / 3500# and k23-478-479 / 4400# brakes, is the magnets? The wiring on the first are green as shown for 10” and the wires on the later are black as shown for 12” and the shoes look the same! Does that alone substantially increase braking power from 3500 to 4400?

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Expert Reply:

Actually, there's a little more to it than that.

The magnets on the # K23-478-479 are a little different, but the primary difference is the mounting bolt pattern. On a typical 3500 lb brake assembly, the mounting studs will all be 2-7/8 inches apart on center. On the # K23-478-479 4400 lb brake assembly, the top studs are 2-7/8 inches apart, but the bottom ones are spaced a bit further apart to prevent a 3500K brake assembly from being used on a 4400K axle.

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Mike L
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