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11-08-2010, 08:04 PM | #1 |
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Correct Way to Mount Wheels on Drums???
I have heard that the wheel is supposed to contact the brake drums in two locations. Firstly – the inner ring just outside the lug nut holes and secondly where the outer wheel flange contacts the drum (I think this location is referred to as the hub?). I was told to make sure there is no clearance between the hub and the drum using a feeler gauge on the outer rim portion. I had a no clearance situation until I switched over my steel drums to cast iron and now I am having problems getting the outer rim to contact. Sorry if I haven't got the terms/descriptions right here.
My questions are: 1) am I thinking about this the right way and 2) has anybody else had similar problems? Thanks for your help. |
11-08-2010, 08:41 PM | #2 |
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Re: Correct Way to Mount Wheels on Drums???
If the cast iron drums are there as a result of converting to hydraulic brakes using '40-'48 drums you need a special spacer designed for that situation.
Charlie Stephens |
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11-08-2010, 09:22 PM | #3 |
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Re: Correct Way to Mount Wheels on Drums???
They are drums for mechanical brakes from Brattons and Berts (1 pair from each vendor).
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11-08-2010, 09:53 PM | #4 |
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Re: Correct Way to Mount Wheels on Drums???
Can you determine what is interfering?
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11-08-2010, 10:52 PM | #5 |
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Re: Correct Way to Mount Wheels on Drums???
I thought the interference is coming from the raised rim on the hub where it meets the drum (the raised ring on the inside of the studs in the picture below). I have ground that area back a bit on the wheel where there is normally a notch. I have no idea whether the ring on the wheel (outside of the bolt holes) is mating properly with the drum but assume it is.
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11-08-2010, 11:26 PM | #6 |
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Re: Correct Way to Mount Wheels on Drums???
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11-08-2010, 11:57 PM | #7 | |
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Re: Correct Way to Mount Wheels on Drums???
Quote:
Charlie Stephens |
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11-09-2010, 11:14 AM | #8 |
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Re: Correct Way to Mount Wheels on Drums???
Thanks Charlie - I believe by wheels are stock and have not been modified.
Still wondering if my assumption about the two contact points is correct? |
11-09-2010, 12:49 PM | #9 |
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Re: Correct Way to Mount Wheels on Drums???
Your assumption about the two contact points is correct. I'm wondering, and I can't tell from the pic of your drum, if the studs got swedged completely. If the shoulder on the stud isn't fully compressed it can hold the wheel out from the drum a little. I can't think of anything else it could be.
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11-09-2010, 01:00 PM | #10 |
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Re: Correct Way to Mount Wheels on Drums???
Try putting a bead of caulk or a string of modeling clay across the drum and read if your wheel marks it, sort of like plasti-gage. From the pictures of the drum it sure looks "thick" where you ask. For grins and giggles check this link to Vince Falter's site:
http://www.fordgarage.com/pages/dangerouslugnuts.htm Good luck, GW |
11-09-2010, 02:16 PM | #11 |
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Re: Correct Way to Mount Wheels on Drums???
i was wondering about the studs having been swedged too. They look a bit high in your photo.
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11-09-2010, 03:15 PM | #12 |
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Re: Correct Way to Mount Wheels on Drums???
The drum assembly (drums and hubs) were bought from Bratton's (rears) and Bert's (fronts) and they were swedged by them. I recall checking the nuts for depth and I believe they were OK. I will check again. I think part of the interference issue was with the raised rim on the drum and where it contacted the wheel. On the wheel there is a little slot cut out just inside the lug nut hole. When I ground the slot out more, the wheel contacted better, however, I am scared to grind that part too much/deep. You can see where I ground it out on the photo of the wheel. On the outer contact point if I can't get it to contact the gap is less than 10 to 20 thousands. I was wondering if anybody else had dealt with this before...
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11-09-2010, 03:39 PM | #13 |
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Re: Correct Way to Mount Wheels on Drums???
"I was wondering if anybody else had dealt with this before...[/QUOTE]
I've put on a lot of cast drums, and never had this problem. I used one set from Brattons several years ago...the rest have been from Mel Gross (the reason being proximity, hence far less shipping.) |
11-10-2010, 12:00 AM | #14 |
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Re: Correct Way to Mount Wheels on Drums???
Make sure yor lug nuts have the first two threads machined out, otherwise the nuts will hang up on the shoulder of the stud where it is swedged over.
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11-10-2010, 07:30 AM | #15 |
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Re: Correct Way to Mount Wheels on Drums???
the ring outside the wheel studs is what supports the wheel. The lug nuts tighten the wheel down on this ring. If you don't have this ring the wheel is not supported right and will crack.The outside flange does not matter. This is why 40 ford drums have to have a piece added to make the support ring for wire wheels.
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11-10-2010, 07:56 AM | #16 |
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Re: Correct Way to Mount Wheels on Drums???
30 tudor, Glenn C. I believe nailed your problem.I had the same thing happen with the cheap lug nuts.I purchased new ones from A&L and problem was solved.
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11-11-2010, 01:31 AM | #17 |
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Re: Correct Way to Mount Wheels on Drums???
Thanks everybody for your help. Car is in the garage for the winter now. I did check the lug nuts and they were OK. It seems to me that there should be two contact points on the drum but I'm not sure now. I'll try again in the spring.
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11-11-2010, 02:05 AM | #18 |
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Re: Correct Way to Mount Wheels on Drums???
Could someone post a quick definition of 'swedged'. Does it have to do with metal expanding(lug studs in this case) at a certain point? Or is it another way of saying 'pressed'? Thanks
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11-11-2010, 01:14 PM | #19 |
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Re: Correct Way to Mount Wheels on Drums???
Swaging is a process that is used to reduce or increase the diameter of tubes and/or rods.
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11-11-2010, 03:53 PM | #20 |
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Re: Correct Way to Mount Wheels on Drums???
A tool with a circular sharp edge is pressed into the stud at the shoulder. This pushes the steel outward and locks the stud in place. A 30 ton press or larger works best to do Model A studs.
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