Packard Forum Index » Post-War (1946-54)

new seal installed-dips out at nut location-took yoke off-cleaned-coated with silicone-still leaks at nut

Sounds like something is excessively worn but did you check to make sure the air vent is open. I believe the 40 axle has the same setup as later axles -- a vent hole thru the bolt holding the brake tube junction block to the axle tube. If the vent is clogged possibly expansion pressure could be forcing oil past the seal.

This is what Howard is talking about.
Wes

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