Re: [DML] Brush with Death

[<delornut@xxxxxxxxxxxx>]

When we bought electric computerized multi-spindled lug nut tooling for the 
Ranger trucks we needed to overcome a phenomena  regarding the clamping load 
on multi- fastener installations. When, for example, you torque one lug nut 
first and then progressively tighten each one, the clamp load will relax on 
the first ones tightened.. Our multi-spindles were programmed to do a 
pre-torque and then, after all the lugs were tight, apply a re-torque 
sequence to account for this. In some types of installations even this isn't 
good enough and on those tools an degree of angle was added to the sequence. 
Cylinder head installations are a good example of using angle after torque. 
The idea behind all of this is to maintain the required clamp load evenly 
across the whole joint. It's important when tightening lug nuts to follow a 
pattern of tightening the nuts a little at a time and doing nuts opposite 
each other in sequence rather than working around the wheel in a clock like 
manner.

Bruce Benson


> I'm glad to hear I'm not the only one that this has happend too.  I 
> replaced my frame last spring.  WHen I went to drive the car I noticed the 
> rear end swayed a bit.  I know I torqued EVERYTHING down to spec as I made 
> a check list.  I drove it like this for about 50 city miles as I worked 
> other things out.  I figured i needed an alignment.  I went to do some 
> brake adjusting in the rear and notice my rear drivers wheel was loose on 
> the hub!  I retorqued it down and now my handling is perfect.
>
>  erik





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