Author Topic: Loose lug nuts  (Read 673 times)

Offline DominicM

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Loose lug nuts
« on: May 31, 2018, 04:32:31 PM »
I got the new tires on the MCI last Friday. Saturday I noticed the lug nuts on the back were loose. Loose enough that I was able to take the nuts off by hand.  I called them on Tuesday to notify them of the situation and that I WILL NOT be driving it up to have them tightened.  They will need to send a truck out and to call me prior to coming out so that I can be there to verify.  Last night I check and sure enough there is still some of the nuts loose.  This time I took one off and stopped by the store after work.  The lady at the front desk stopped in her tracks when I set the nut down.  They assured me that they tightened all the nuts down with an impact, and can not explain why they are still loose.  Tomorrow they will be back out again with new nuts.. 

What would cause the lug nuts to remain loose?  Or is it a better assumption that they did not torque down all of them just the couple that were loose and doing so it loosened the other ones?

Dominic
67 MCI 5A
I live in Nashville,  and Reside in my 5A in Big Spring TX for work at the moment,  Will update as I move around.

Offline Jim Eh.

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Re: Loose lug nuts
« Reply #1 on: May 31, 2018, 05:36:18 PM »
That sounds like a pretty logical explanation. They can't loosen by themselves just sitting.
"Some days it's just not worth chewing through the restraints"
Jim Eh.
1996 MC12
6V92TA / HT741D
Winnipeg, MB.

Offline bobofthenorth

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Re: Loose lug nuts
« Reply #2 on: May 31, 2018, 05:55:26 PM »
........They assured me that they tightened all the nuts down with an impact, and can not explain why they are still loose.

That's a big red flag if they're claiming that the nuts should be tight because they torqued them with an impact.  If they're not using a torque wrench then they're cowboy clowns. 
R.J.(Bob) Evans
Used to be 1981 Prevost 8-92, 10 spd
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Offline DominicM

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Re: Loose lug nuts
« Reply #3 on: May 31, 2018, 06:17:07 PM »
I want the job complete. After that I intend on using my torque wrench to verify/ complete torque.   

I told the shop the same thing that they couldn't/ shouldn't have come loose just sitting.   I doubt the West Texas heat loosened them.   
67 MCI 5A
I live in Nashville,  and Reside in my 5A in Big Spring TX for work at the moment,  Will update as I move around.

Offline Iceni John

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Re: Loose lug nuts
« Reply #4 on: May 31, 2018, 08:35:21 PM »
I want the job complete. After that I intend on using my torque wrench to verify/ complete torque.   

  
If they zapped them on to a bazillion ft/lb, and if your torque wrench is set to 500 ft/lb, it won't tell you how much overtightened they are.   Sure, they can use an impact for the run-on and initial tightening, but they also must use a torque wrench for the final full tightening, not just to make it click and call it good.

John
1990 Crown 2R-40N-552 (the Super II):  6V92TAC / DDEC II / Jake,  HT740.     Hecho en Chino.
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Offline windtrader

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Re: Loose lug nuts
« Reply #5 on: May 31, 2018, 09:16:30 PM »
Not sure why you want them to touch your wheels again. Especially if you are going to recheck and torque them, just do it yourself and avoid further issue with them. And find a new tire shop.
Don F
1976 MCI/TMC MC-8 #1286
Fully converted
Bought 2017

Offline eagle19952

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Re: Loose lug nuts
« Reply #6 on: May 31, 2018, 10:20:16 PM »
If they zapped them on to a bazillion ft/lb, and if your torque wrench is set to 500 ft/lb, it won't tell you how much overtightened they are.   Sure, they can use an impact for the run-on and initial tightening, but they also must use a torque wrench for the final full tightening, not just to make it click and call it good.

John

Which is why a 1 inch gun takes them off and a 1/2 inch puts them on....
Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.

Offline chessie4905

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Re: Loose lug nuts
« Reply #7 on: June 01, 2018, 04:26:16 AM »
1967 mc5??? How many times have lug nuts been off and on since new? How often have bad ones been replaced? Quite common to have worn out studs and nuts tighten, but won't take rated torque anymore. May be time for stud and nut replacement on all of them? Consider...
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline eagle19952

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Re: Loose lug nuts
« Reply #8 on: June 01, 2018, 04:59:13 AM »
In anticipation of getting old...I got me another tool...:)

Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.

Offline dtcerrato

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Re: Loose lug nuts
« Reply #9 on: June 01, 2018, 05:45:33 AM »
I'm not familiar with that tool, what is it? Torque multiplier?
Dan & Sandy
PD4104-129 since 1979

Offline eagle19952

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Re: Loose lug nuts
« Reply #10 on: June 01, 2018, 06:08:28 AM »
I'm not familiar with that tool, what is it? Torque multiplier?

yes.
Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.

Offline bigred

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Re: Loose lug nuts
« Reply #11 on: June 01, 2018, 06:35:10 AM »
This sounds like the crap Snider Tire would do!!!
Rhet Raby           137 Elk Mtn Rd       Asheville N c 28804             1993 Prevost XL

Offline Branderson

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Re: Loose lug nuts
« Reply #12 on: June 01, 2018, 07:17:02 AM »
You guys got me paranoid b/c I've never checked lug nuts.  One b/c I have hub covers and never really thought of it.  Next time I get it serviced, I'm going to ask my guy how he tightens it and if he tests with torque wrench. 
- Brad

Offline lostagain

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Re: Loose lug nuts
« Reply #13 on: June 01, 2018, 07:26:16 AM »
You cannot test with a torque wrench. As mentioned above, your wrench could be set at say 450 ft/lb, and click. That tells you that the nut is at least at 450. But it could've been tightened to 600 or 800 and you wouldn't know.

To do it right, you have to loosen the nuts, then tighten with the wrench to the proper torque. Then re-torque after a few hundred miles.

JC
JC
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1977 MC5C, 6V92/HT740

Offline lvmci

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Re: Loose lug nuts
« Reply #14 on: June 01, 2018, 07:33:28 AM »
Dominic, I would have somebody video tape you torquing the nuts all the way around so that you would have video of the event in case you need to go to court, lvmci...
MCI 102C3 8V92, Allison HT740
Formally MCI5A 8V71 Allison MT643

Offline Jim Eh.

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Re: Loose lug nuts
« Reply #15 on: June 01, 2018, 09:16:47 AM »
You cannot test with a torque wrench. As mentioned above, your wrench could be set at say 450 ft/lb, and click. That tells you that the nut is at least at 450. But it could've been tightened to 600 or 800 and you wouldn't know.

To do it right, you have to loosen the nuts, then tighten with the wrench to the proper torque. Then re-torque after a few hundred miles.

JC

Pretty important step. If you find a nut or two had come loose on the re-torque, keep checking until they have fully seated. If they don't ... time for new studs and nuts.
"Some days it's just not worth chewing through the restraints"
Jim Eh.
1996 MC12
6V92TA / HT741D
Winnipeg, MB.

Offline eagle19952

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Re: Loose lug nuts
« Reply #16 on: June 01, 2018, 09:47:59 AM »
Pretty important step. If you find a nut or two had come loose on the re-torque, keep checking until they have fully seated. If they don't ... time for new studs and nuts.

If the nuts have been over torqued 100%...the threads are stretched...

1 inch off
1/2 inch on
torque.

Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.

Offline DominicM

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Re: Loose lug nuts
« Reply #17 on: June 01, 2018, 03:44:44 PM »
At work I verify torque at times,  we would use a patern specified by the flange manufacture followed but another round starting at number one going clockwise for a single click until a complete round can be completed without additional movement.  After that we would follow up by 3 more bolt tightening.

I have contacted MCI about purchasing new Air bags, still trying to locate 2 rear brake chambers. They do not have the studs, inner and outer lug nuts.

I need to make a trip to MD and back to Texas and then I would like to make the replacement.
67 MCI 5A
I live in Nashville,  and Reside in my 5A in Big Spring TX for work at the moment,  Will update as I move around.

Offline chessie4905

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Re: Loose lug nuts
« Reply #18 on: June 01, 2018, 06:17:40 PM »
Luke should be able to get them. If your chambers are dd3's, they are still available as rebuilt. Try busfixx.com as one source.
GMC h8h 649#028 (4905)
Pennsylvania-central