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1954 Buick Forum - the 54 Buick Highway

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Good eye!  As best I can figure, the front shoe has the mechanical advantage of the forward rotation to help it dig into the drum, so it is a bit smaller than the rear, which it pushes back against the anchor pin.  Hence the term "self-energizing."  You should find the brakes a little less grabby.

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There is a lot to be assumed.

i pretty much went by the manual.

i tightened the nut to almost the max, spun the drum and tightened again. That rotor runs smooth.

then I backed it off one hex and installed the cotter pin

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21 hours ago, 72gs455 said:

then I backed it off one hex and installed the cotter pin

It looked good until here.  At this point tighten till all looseness is eliminated then tighten until you can insert a cotter pin in either the horizontal or vertical hole.  This will give up to 1/12 preload on the bearings.  Ball bearings need preload for long life.

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