mysterious lug nuts.

[angerranger54]

this question has nothing to do with trucks but im hoping you experinced mechanics can give me some insite. im in the military and i work on a few diffrent types of trailers that are designed to carry a vast assortment of munitions and bombs. my question is, can lug nuts just fall off even if they have been properly tourqed and assembled? i have had such a problem with loose and missing lug nuts. i know with no doubt that they were installed properly because i installed them. my only answer is that every time this happens my supersioson makes me go out and re tourqe every lug nut on every trailer. so now all nuts have been tourqed to 65 ftlbs at least 10 times. can constant re tourqing actully cause damage? here is a link to the company that produces these trailers if you are wondering what im talking about.
http://www.pdi-gss.com/products.htm

 

[c_note]

could be the wrong lugnuts. check the part numbers in the pub and see if its what it calls for.

this is the most info that we should discuss on the net about this.

 

[angerranger54]

trust me i have researched everything about these trailers and the lugnuts match the item technical order partnumbe, and these trailers are not classified.

 

[Toms01PSD]

65 ft lbs? Are you positive it's not more than that? My rangers lug nuts are even higher than that at 100 ft lbs.

 

[AllanD]

You are fighting a typographical error in the printed torque spec.

65ft/lb? bullshit.

It's more likely supposed to be 165ft/lb on any kind of military trailer.

And if they are working loose they are OBVIOUSLY not sufficiently tightened.

Talk to your supervisor about the problem and don't accept
a "you are doing it wrong" from him.

SHOW HIM the spec and the tool and ask HIM to tell you what is wrong.

AD

 

[angerranger54]

65 ft lbs? Are you positive it's not more than that? My rangers lug nuts are even higher than that at 100 ft lbs.

100% positive. 65 + or - 5 foot pounds. these nuts are also installed with a lock washer to prevent this problem. already submitted changes to the technical order to get the tourqe value raised to 85 foot pounds and submitted a deficiency report on the lock washer. im just at a wits end with this problem. "such a simple fix, just tightin the s@#t out of em" that was the boss mans answer.

oh and i have contact the item specialist and the engineers and they are under the impression that 65 pounds is suficcent

 

[kunar]

on heavy equipment its common to have lug nuts work loose. have you ever seen a truck with green or yellow tags on each one? they are made to be able to see at a glance if the nut has started to work loose. i do agree though that 65lbs isnt tight enough. on a 1/2" lug, i torque them to 100lbs.

 

[angerranger54]

its not actully the typical "lugnut" its a 3/4 bolt mounted on a stud. if that has anything to do with it.

 

[85_Ranger4x4]

so now all nuts have been tourqed to 65 ftlbs at least 10 times. can constant re tourqing actully cause damage? here is a link to the company that produces these trailers if you are wondering what im talking about.

I have wondered about that, part of my personal procedure when I put a wheel on anything is going back around and checking to make sure I didn't miss one with the torque wrench. Even when it clicks, it always moves just a little leaving me wondering exactly how much more they are torqued. It can't be much, but just something I noticed.

 

[Earl43P]

Loc-Tite those puppies and call it a day.

 

[angerranger54]

id love to loc tite em but its not an authorized product for use and id love to tourqe mark em too BUT that would be an unautorized marking. in the military we have to go by exactly what the book tell us to do. HATE IT!!! commen sense is not a so commen in the military. have i mentioned that i have the worst spelling.

 

[mentalbreakdown00]

+1 65 isnt enough. 65 ft lbs is a civic with 4 little studs........ an F-250 super duty is 150 ish..... you tell me...

 

[angerranger54]

well these trailers cant be towed over 15 MPH

 

[mentalbreakdown00]

under torque lug nuts on anythign and see if they dont wiggle loose in just a few miles regardless of speed.... A few years ago when I still worked for firestone they put out a bulliten on lug tq. They found that over torquing usually failed at higher speeds from the stud snapping, while under would cause them to wiggle loose at lower speeds .... just a thought, they are too loose, or even your wrench is waay out.

 

[angerranger54]

well it must me to loose because our wrenchs are certified every four months by the percision mesaurement shop.