Heavy crosswind pops stud

[David Anderson]

I drove back from Roswell to Brownfield Texas on US 380 a couple of weeks ago. I had to turn my steering wheel 45° to the right just to stay on the road due to a tremendous wind out of the south in front of a coming storm in the Rocky Mountains. When I stopped for the night in Lamesa Texas I noticed that a stud was gone on the curbside driver's wheel.
I torque these at 450 pounds so they weren't stretched, but the constant wind with the wheel turned did a number on this thing.

I keep spares in my toolbox and fixed it when I got home.  These studs are pretty easy to get in and out because I put never seize on them.  Not a bad job at all.  I was a good time to inspect drums and brakes. 
David

[chessie4905]

450 plus never seize equals over 500lbs or more. They say to also replace stud on either side. Personally, I'd  replace them all on that wheel.

[luvrbus]

450 plus never seize equals over 500lbs or more. They say to also replace stud on either side. Personally, I'd  replace them all on that wheel.

DOT specs you replace studs in 3's that is one on each side of a broken stud, they look for that on a DOT inspection.LOL 1 of my trucks got the nice red tag in Coffeyville Ks for that.   
It takes over 800 ft lbs to damage a stud according to Mertior 450 to 500 lbs on stud pilot wheels is to prevent wheel damage from the tapered nut and they will crack a wheel.I would ? crosswinds breaking a stud though.   

[tr206]

Over torquing probably many times over through the years change them all would be my answer also. Remember back in the day we had wheel wrench and a short bar or a 4 way to change a tire the big @$# 1" impacts are for taking over torqued nuts off not putting them on.

[lostagain]

I don't think the wind broke your wheel stud. Like the others said: it is metal fatigue from over torquing and time. 

[luvrbus]

I think that was a new stud David said he used never seize so they were easy to change,David is great about upkeep on his Metro Eagle he always has been.Me I will not buy studs by price, I bite the bullet and use only Mertior studs made in the USA double the price of the offshore $#!% ,BTDT with studs ,Gary Hatt as thrifty as he is didn't complain about buying the inner and outer nuts made in USA 20 bucks vs $45.00

[Van]

I I noticed that a stud was gone on the curbside driver's wheel.

David

First maybe some clarification on which wheel? How were these torqued Hand/Impact? Cross wind being the cause is highly unlikely.
Under torqued? Nope, There would be more broken! Here is what an under torqued wheel looks like which happened when I bought Ace's H-3 and let Lazy Dayz Fla install 2 new steers with under torqued lugnuts. I almost bought the farm cause of this. If you over tightened 1 there will be more to follow. If you know, you know... if you don't, you don't.

[luvrbus]

Eagle studs are not that expensive to begin with compared to Prevost and MCI,bus people sure have a lot of stud trouble for some reason,I never broke a stud on my Eagle and had very few break on my trucks. Southern Oregon cracked a Alcoa wheel on my Eagle 15 years ago with the young guy hammering on it with 1 inch impact gun,the stud was ok I could screw the nut on by hand,that stud has broken yet.Lol I bought never seize by the gallons and used it to prevent the fly ash and lime from corroding the nuts and studs on my trucks and dump trailers.         

[David Anderson]

Driving 134 miles with my steering wheel turned 45 degrees sometimes more to the right from Roswell to Brownfield tx had to put some big strain outward against the nuts on the curbside front wheel.  The wind was 35+mph off my right side from the south, dustorms and sometimes low visibility. I've broken several studs on the steers over the years but never any on the bogies.  They are original to the coach.
To answer your question they were torqued by hand.

It's interesting to see the pictures above of under tightened nuts. The studs sheared off inside the plane of the wheel. I've always seen mine shear even with the plane of the wheel.
David

[chessie4905]

Maybe the weight on the front axle should be checked while at it. Overload?

[luvrbus]

Bogie axles don't carry much weight on a Eagle 5000# max on each side ,weight didn't break the stud,they do load up twisting and turning.40 years on studs is pretty damn good..The studs on Houston Metro buses were changed with each brake job I seen that in person., I don't have any idea why the studs break at the wheel that is 1-1/8 inch at the wheel and 7/8 inch at the hubs. Jim the RV safety guy had a Metro Eagle I don't recall him ever breaking studs. I do know neglect is not David's problem lol he is only Eagle guy I know still running the Voith automatic in a Eagle.He could have a batch of bad studs since Metro supply was by bids>Houston Metro ran Eagles on the N,S,E and W runs for years beginning with the 05's and ran those up to Eagle went out of business. Houston didn't have much luck with commuter bus manufactures, Eagle went out, then they bought Neoplan's they went out then they bought Bluebirds and they went broke, now they are MCI's   

[tr206]

The wheel looks worn out to me lugnut tapers on the wheel, how about the ears on the hub where the wheel hole seats (the aluminim corrodes out where it rides on the ears) they all work together maybe the combined wear puts all the stress on the lugnut studs.

[luvrbus]

The wheel looks worn out to me, how about the ears on the hub where the wheel hole seats (the aluminim corrodes out where it rides on the ears) they all work together maybe the combined wear puts all the stress on the lugnut studs.

I don't see a picture of Davids wheels ? only Van's on his H-40 Prevost and he has new wheels now ,aluminum wheels do have their pro's and con's though, my 3 axle low boy would break the centers out some times loaded but buses never see 118,000 lbs like my low boy would on a daily use 

[tr206]

Sorry. Wrong wheel but maybe the same problem? Just doesn't make sense I have never had a stud snap off. Unless they are aftermarket junk?

[tr206]

I don't see a picture of Davids wheels ? only Van's on his H-40 Prevost and he has new wheels now ,aluminum wheels do have their pro's and con's though, my 3 axle low boy would break the centers out some times loaded but buses never see 118,000 lbs like my low boy would on a daily use

Good point Clifford but yeah buses don't get that kind of abuse. I have run 10" spread axles trailes 40,000 pounds on them they really catch hell on turns loaded if you forget to dump air on turns.