Wheel Separation


The vibration started and smoothed out when I was coming down a long hill with very little traffic and no houses around. I don't think anybody was hurt or any property damaged. I wasn't going faster than 45 mph (70 kmh for our Metric friends) at the time. That's still more than fast enough to kill somebody.

I'm about done with the ****-poor maintenance practices at this company.
How old is that trailer that still have Budds
 
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One of our retailers found the wheel assembly. I think it's the whole assembly. Turns out, I dropped it in town when I was going really slow. I remember hitting a bump, but that town's full of bumps, so I didn't think anything of it. Next time I'm there, I'll pick up the wheel assembly.

Our mechanic is saying he thinks the studs failed. Apparently, whenever he replaces a hub, he has to pound out the studs because they're too long and seat a different set into the hub.

I asked whether it might behoove us to move away from using Budd rims and go to the kind with a single flanged nut on each stud instead.
 
View attachment 50818View attachment 50819

One of our retailers found the wheel assembly. I think it's the whole assembly. Turns out, I dropped it in town when I was going really slow. I remember hitting a bump, but that town's full of bumps, so I didn't think anything of it. Next time I'm there, I'll pick up the wheel assembly.

Our mechanic is saying he thinks the studs failed. Apparently, whenever he replaces a hub, he has to pound out the studs because they're too long and seat a different set into the hub.

I asked whether it might behoove us to move away from using Budd rims and go to the kind with a single flanged nut on each stud instead.
That's a relief. Or would be for me anyway, knowing I wasn't at highway speed and it kinda just plopped off. Lol.

One downside to driving primarily at night is we really can't see anything like that happening even if we feel something amiss. But it's also funny (not haha) how much can happen 53 feet behind us without feeling a damn thing.
 
View attachment 50818View attachment 50819

One of our retailers found the wheel assembly. I think it's the whole assembly. Turns out, I dropped it in town when I was going really slow. I remember hitting a bump, but that town's full of bumps, so I didn't think anything of it. Next time I'm there, I'll pick up the wheel assembly.

Our mechanic is saying he thinks the studs failed. Apparently, whenever he replaces a hub, he has to pound out the studs because they're too long and seat a different set into the hub.

I asked whether it might behoove us to move away from using Budd rims and go to the kind with a single flanged nut on each stud instead.
I don't think the right studs were in the hub. I've seen a broke stud or two, back in the day, and while once in a while the stud would be loose in the hub, I can't imagine all 10 falling out.

You'll have to let us know if the drum is there. It shouldn't be, but if it is, somebody done really FUBAR'd things!
 
I spent several years in Japan as a teenager and then Germany as an adult. Miles-Kilometers is a fairly easy conversion for me. But there are a lot of European, Australian and other overseas members here who don't make those conversions easily. So I don't mind posting them when they're relevant to the discussion. In this case, my ground speed is part of it.
 
I don't think the right studs were in the hub. I've seen a broke stud or two, back in the day, and while once in a while the stud would be loose in the hub, I can't imagine all 10 falling out.

You'll have to let us know if the drum is there. It shouldn't be, but if it is, somebody done really FUBAR'd things!
In talking with the mechanic about this, my understanding is the lug nuts for Budd rims are far less forgiving than hub-guide style. He says the inside part has to be torqued to 550 lb. and the outside between 550 and 650 lb. If the nuts get overtorqued, especially the inside part, they can spin in the hub, destroying the splines. Once that happens, it's nearly impossible to tighten them properly.

We have an outside tire company come in to check/replace tires. It's so easy to just rip the nuts on with the big air gun rather than snug them and then use the manual torque wrench. It's within reason to consider the tire guy spun the studs and then couldn't tighten them. It's also within reason to consider if that did happen, whoever did it wouldn't want to get in trouble and...what could possibly go wrong? So he didn't mention it.

Well, what could go wrong is since the nuts weren't tight, they wiggled and rattled enough to shear the heads and widen the holes in the hub. That goes on long enough, we get wheel separation.

I'll know more when I see the wheel assembly. I understand the whole thing is still together, with the brake drum still inside the rims. Not sure if it's clear in the picture, but the splines in the stud holes of the hub are spun nearly smooth.

20190701_222849.jpg
 
In talking with the mechanic about this, my understanding is the lug nuts for Budd rims are far less forgiving than hub-guide style. He says the inside part has to be torqued to 550 lb. and the outside between 550 and 650 lb. If the nuts get overtorqued, especially the inside part, they can spin in the hub, destroying the splines. Once that happens, it's nearly impossible to tighten them properly.

We have an outside tire company come in to check/replace tires. It's so easy to just rip the nuts on with the big air gun rather than snug them and then use the manual torque wrench. It's within reason to consider the tire guy spun the studs and then couldn't tighten them. It's also within reason to consider if that did happen, whoever did it wouldn't want to get in trouble and...what could possibly go wrong? So he didn't mention it.

Well, what could go wrong is since the nuts weren't tight, they wiggled and rattled enough to shear the heads and widen the holes in the hub. That goes on long enough, we get wheel separation.

I'll know more when I see the wheel assembly. I understand the whole thing is still together, with the brake drum still inside the rims. Not sure if it's clear in the picture, but the splines in the stud holes of the hub are spun nearly smooth.

View attachment 50824
They holes would have to be wallered out significantly. BFA1CF61-3264-454D-970B-B727BECE4D78.webp

As you can see it’s shouldered. If the wheels and drum are together that means that shouldered head pulled through the hub.
 
I'd want a metallurgy test on that hub.


I'll put a steak dinner on it not being in spec. Especially for all 10 to fail that way.

And then I'd year every other hub apart and do a hard mechanical inspection on every other hub on that trailer.
 
I'd want a metallurgy test on that hub.


I'll put a steak dinner on it not being in spec. Especially for all 10 to fail that way.

And then I'd year every other hub apart and do a hard mechanical inspection on every other hub on that trailer.
Are you suggesting they might have used the same kind of Chinese peasant back yard foundry recycled nails and rusty gate hinges steel that Ford used to make the leaf spring hangers on their 1993-on Rangers? 🤔
 
Are you suggesting they might have used the same kind of Chinese peasant back yard foundry recycled nails and rusty gate hinges steel that Ford used to make the leaf spring hangers on their 1993-on Rangers? 🤔
Absolutely incredible! Are you suggesting our strategic good buddies in China are shipping us shoddy knock off parts?? You'd expect that outta those evil Europeans... especially after ripping us off over NATO. Is trump aware of this? Ivanka will be POd!

:harumph:




:stirpot2:
 
@r3gulator3
@Hammer166
@mndriver
I'm at a complete loss. The wheel group is tightly bolted together with no play or shake by hand. Can't turn anything, nothing is loose in any way. Studs appear to be in perfect condition.
I just don't know.

Pictures:

Outside
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Inside with brake drum intact
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Studs all look like this.
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We got luckier than we have any right to. This fell off the trailer as I was pulling into the customer's parking lot. I was going less than 5 mph.
 

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