67 F-100 Brake Drum Fit Up Problems
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5th Wheeling
Joined: Jan 2013
Posts: 44
Likes: 1
From: Fort Worth, Tx
67 F-100 Brake Drum Fit Up Problems
I'm replacing the front drums on my 67 F-100. Got the old ones separated from the hubs, cleaned the hubs up with a wire brush, replaced bearings, etc, retracted the shoes so that the replacement drum would slip over the shoes.
Can't get the new drums to seat snug against the hub as it appears that the ID of the 3 1/2" +/- hole in the drum isn't quite big enough to allow the drum to fit over the "ledge" on the hub.
Tried methodically tightening lug nuts on it a little at a time, but never got it to seat. Did get one stuck for a while.
Anybody come across this problem before? Do I just have some bad replacement drums?
Appreciate any clues. Thx.
Can't get the new drums to seat snug against the hub as it appears that the ID of the 3 1/2" +/- hole in the drum isn't quite big enough to allow the drum to fit over the "ledge" on the hub.
Tried methodically tightening lug nuts on it a little at a time, but never got it to seat. Did get one stuck for a while.
Anybody come across this problem before? Do I just have some bad replacement drums?
Appreciate any clues. Thx.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
Have some dial calipers to compare the two dimensions? Could be bad machinework? Sometimes it is the lug sticking through that has some of the knurl that will hold it up off the hub.
If it isn't too bad might take some light sanding to open the hole to fit over the hub. Air motor with sanding roll? Even just a round file.
If it isn't too bad might take some light sanding to open the hole to fit over the hub. Air motor with sanding roll? Even just a round file.
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
2X on the dial calipers. Sounds like your aftermarket drums prolly made in China. The Chinese don't give a crap about making something with the correct dimensions. Prolly made them with that pilot hole too small.
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5th Wheeling
Joined: Jan 2013
Posts: 44
Likes: 1
From: Fort Worth, Tx
Thanks guys. I'm betting on Jefffafa's theory so before I try Freightrain's suggestions I'm gonna try to swap them out for another manufacturer. These were definitely Chinese-made. I've got some Federal-Mogul drums ordered (hopefully not from China....). We'll see...
Appreciate the responses.
Appreciate the responses.
Lead Driver
Joined: Aug 2003
Posts: 7,592
Likes: 10
From: **** hole San Jose ca.
Have some dial calipers to compare the two dimensions? Could be bad machinework? Sometimes it is the lug sticking through that has some of the knurl that will hold it up off the hub.
If it isn't too bad might take some light sanding to open the hole to fit over the hub. Air motor with sanding roll? Even just a round file.
If it isn't too bad might take some light sanding to open the hole to fit over the hub. Air motor with sanding roll? Even just a round file.
Plus rust will build up on the hub flange sometimes and, I've
had to use a file to clean it off, and any dee burr them to remove & put on.
I'd use a rotary file or a rotary stone to dee burr that drum hub hole.
It's time and money and your truck is not on the road.
If you had not other sources on drums you'd make them work Right!
Orich
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
1964/67 F100: Ford only sold the drum with the hub (C6TZ-1102-B). Auto parts stores did sell the drum by itself.
When separating the drum from the hub, the old studs have to be removed from the hub and new studs installed.
The old studs should not be reused, as once they're removed from the hub, the serrations that retain them in place flatten out.
FoMoCo recommended using a press to remove the old studs, press the new studs in.
Make sure the drum is correct. 1967 F100's have 11" x 2" front brakes, while 1968/72 F100's have 11" x 3" front brakes.
When separating the drum from the hub, the old studs have to be removed from the hub and new studs installed.
The old studs should not be reused, as once they're removed from the hub, the serrations that retain them in place flatten out.
FoMoCo recommended using a press to remove the old studs, press the new studs in.
Make sure the drum is correct. 1967 F100's have 11" x 2" front brakes, while 1968/72 F100's have 11" x 3" front brakes.
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5th Wheeling
Joined: Jan 2013
Posts: 44
Likes: 1
From: Fort Worth, Tx
Thanks a ton guys. I've worked the hubs over with a die grinder with a wire wheel. I did have to get the old lug studs out to separate drums from hubs. Will replace the studs. Checked the shoe/drum width. Both 2". Great stuff ND. Next set of drums due in next week. Will let y'all know how it goes. Really appreciate the support.
Ken
Ken
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