Hi, last wekend I blew a front wheel cylinder on my 1965 Ford F100, which forced me to do the brake job I have been putting off since last fall. As I was wrapping up I went to slide the drums on and I could not get them to seat right. They are about 1/8" from seating on the hub. I did some measuring and found out that China forgot to drill out the stud holes on the drums. They measure right at .600" Diameter, but the studs are 5/8 and all measure .625-.630" Diameter where they are supposed to seat against the drum. The parts store measured another set they had and they measured .600" again, and another stores measured .580". Can I just throw the drums in a mill, dial in on the hole and drill them all out to 5/8", and then throw a chamfer on it and hope it goes in? Could I even just do it by hand? My understanding is that they are supposed to center on the hub anyways, so it should not be a big deal if I drill out my holed even bigger? Lets say I had an extra .005" or .010" in my holes. Would that work? Can anybody point me in the right direction here? Thanks.
I'm no expert but since they are "hub centered" , it seems logical that you could enlarge the existing hole on the milling machine as you suggested. As long as the drum holes are truly round and "fit" the stud the drums shouldn't be able to rotate on the hub.
Are these rear drums? The reason I ask is if they are fronts, they are usually staked to the hub, hence the smaller sized hole. Other than that, for rear applications the holes are usually on the sloppy side and the hub fit is the critical item. Bob
The threaded part of the stud is only 1/2", so it seems that it's the front drums....how did you remove the drums from the hubs? Did you replace the studs?
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