| Author |
Message |
Chuck MC8 (68.154.18.221)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 04, 2003 - 6:59 am: | |
Instead of adding the the previous lug bolt thread, I'll just start another for the Alcoa wheediscussion. I've been chasing my tail for two weeks trying to get longer studs for my MC8.
I asked MCI and Mowhawk to each measure their longest wheel studs before I odered them.
Same as I have. 4" with the 1 1/8" part being 2". Ray Cox in Atlanta waskind enough to order the ones his parts book lists for Aluminum wheels.
Same as mine.
So,Im scratching my head and wondering what next. Obviously, My studs had been changed. ( I could tell when they were removed)
Soooo, then I happened by a bus charter company that had several MC9's with Alcoas on their yard.
So, I whipped in there and very cooly walked over and removed one of the lug covers on each wheel.
The stud is flush with each lug nut. There is no thread protruding past the end of the nut. These busses are in daily charter use and (I assume) are DOT inspected and certified.
Finally, finding the correct Alcoa site on the web http://www.alcoawheels.com/heavy/literatu/HDSM0199.pdf
Heres the specs Alcoa requires- (and I'll print a copy and keep in my bus)
Page 17, fig 4.5 states that the stud length must be 1.5" (with the brake drum installed)
in figure 4.9, Alcoa states "the number of turns to disengage a 1 1/8 nut should be at least five full turns" In the photograph of the installed wheel, the nut is flush with the end of the stud.
Unfortunately, I couldn't find anyone in the Atlanta area who is familiar with the special lug nut for Alocas that Don is reffering to.
But that's not a helluva suprise, since I also cant find anyone who has the equipment to properly torque wheel lugs.
Hope this helps others who have changed to Alcoas |
Don KS/TX (66.82.9.13)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 04, 2003 - 8:25 am: | |
Seems typical these days Chuck, I am not too sure there DOES have to be threads showing anymore, just some "old timers tale". I specifically recall bitterly opposing it, maybe someone listened to my bitching!
Here is the current Federal Motor Carrier website requirements, nothing about showing threads:
11. Wheels and Rims.
a. Lock or Side Ring. Bent, broken, cracked, improperly seated, sprung or mismatched ring(s).
b. Wheels and Rims. Cracked or broken or has elongated bolt holes.
c. Fasteners (both spoke and disc wheels). Any loose, missing, broken, cracked, stripped or otherwise ineffective fasteners. |
Gary McFarland (Gearheadgary) (209.128.99.4)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 04, 2003 - 2:30 pm: | |
thanks for the link to the PDF!!!
I have a double-sided color printer, it looks like a factory manual.
Cool.
Gary |
Don KS/TX (66.82.9.27)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 04, 2003 - 7:57 pm: | |
Guys if you like facts and manuals on wheel stuff, here is another link I accidentally come onto, loved the information in that manual too: http://www.accuridecorp.com/safety_manual_3.asp |
NEO/Russ (216.80.153.211)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, October 04, 2003 - 10:43 pm: | |
I was an engineer for Mercury Outboards for many years. Our products experienced as much vibration as anything (two cycles, jumping in and out of the water). We always used the 2-3 thread rule, but for the following reason: most applications used nylon lock nuts. Because commercial bolts have a starting diameter that is smaller than the main body for the short lead for the threading tools require. The only way to provide the maximim holding, as well as effectiveness of the locking ring, is to have 2-3 threads protruding. I have a feeling that this rule is quite common among experienced technicians who want maximum holding power for any fastener. |
Don KS/TX (66.82.9.34)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 05, 2003 - 10:02 am: | |
I think you are getting there with that, I CAN buy that on many commercial bolts, the first 3-4 threads or so are smaller, NOT suitable for torque or holding even a nylon locknut. Wheel studs are not that way though, so maybe that is why they stopped requiring it on wheel studs. Damn, are we smart or what? |
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