Whats the bolt on top of the D44 knuckle for?

[PDQ]

I'm working on routing my front brake lines to my GM calipers as described in the Tech Article from Broncobowsher where they go around the ball joints, and use a clamp that uses the bolt on top of the knuckle to secure them, but I am wondering, what's that bolt even for? And if I modify or use it to hold a clamp, does it affect anything?

If you aren't familiar with the write up, it's the 3/8" bolt on top of the knuckle between the ball joint nut and the rotor.

Anyone else done this? If so have you found clamps that use the 3/8" bolt itself rather than trying to drill and tap the bolt for another bolt?

Thanks as always

 

[hankjr]

howdy.

i seem to recall that there was a factory bracket that is held down by that bolt that had flex brake line on one side and hard brake line on the other. its been a long time but that's what i remember. i did not use that bracket for front disc conversion

hank

 

[spap]

If it is the same thing I am thinking about, that bolt is a bump stop.
So the tires don’t hit the radius arms, for wider tires you adjust it out.

 

[904Bronco]

howdy.

i seem to recall that there was a factory bracket that is held down by that bolt that had flex brake line on one side and hard brake line on the other. its been a long time but that's what i remember. i did not use that bracket for front disc conversion

hank

Yes and it was for Drum Brakes in the Front...

 

[PDQ]

Not the bump stop bolt, but the bracket for part of a drum brake set up makes sense. I feel better now...great stuff, thank you.