question Wheel nut torque help!

[Mk3iain]

I have looked through all the manuals I have ( I dont have the correct maint. manual) for the Milly Mk3 recovery and all it says for wheel nut tightening is the sequence but no mention of torque. I have looked up the charts for 7/8 BSF but I dont know the grade.

I may just be usless at finding things but is there a recommended torque for this application?

Many thanks in anticipation:tup::

[antarmike]

A k3 Militant should have 1" wheel studs according to the user manual.

[Mk3iain]

A k3 Militant should have 1" wheel studs according to the user manual.

 

Hi Mike

Yes but the parts book says 7/8 BSF !

I have just been and checked with a measuring stick and it is around 7/8 diam.:nut:

 

Iain

[griff66]

ballpark figure 75 foot pounds

[antarmike]

Antar and 30T constructor are 1" but I must say I thought Milly's were 7/8". Just saying what the manual says, and as we know manuals are not always reliable....

[Mk3iain]

Thanks guys!:thanx:

[N.O.S.]

Antar and 30T constructor are 1" but I must say I thought Milly's were 7/8". Just saying what the manual says, and as we know manuals are not always reliable....

 

I believe 30T Constructors use 7/8" wheel nuts (unless the studs on mine were so badly worn that 7/8 would just fit :-D).

 

Iain - if you need wheel nuts, 7/8" BSF are still available through commercial vehicle / trailer spares stockists as there are still quite a few artic trailers running on this size.

[Richard Farrant]

ballpark figure 75 foot pounds

 

They should be much tighter than 75 ft/lbs.

 

Just looking at the Scammell EKA handbook and for 7/8" BSF nuts, they should be 325 - 375 lbsf/ft

[antarmike]

Maybe, but Steve guest gave me some studs when two of my Antar studs sheared, they were 1" , I thought he said they were constructor, but He did have a Contractor for a while.....

[N.O.S.]

They should be much tighter than 75 ft/lbs.

 

Just looking at the Scammell EKA handbook and for 7/8" BSF nuts, they should be 325 - 375 lbsf/ft

 

Richard - is that just before, or just after, the 10ft steel tube on the wheel wrench goes BANG ? :cool2:

 

 

 

No, really, don't do this at home......but in all seriousness I guess the correct torque is not far below this point??

Edited April 30, 2011 by N.O.S.

[Richard Farrant]

Richard - is that just before, or just after, the 10ft steel tube on the wheel wrench goes BANG ? :cool2:

 

Tony, you will not believe this, but the EKA nuts still worked loose and our REME recovery crew carried a torque wrench to regularly check them. Mainly rears and I think it was possibly due to when bogie blocking was actuated. This all came to a head when early one morning they were returning to the Workshops and were amazed to see a wheel overtake them on the inside, cross the road and dissappear into a wood. They chained up the rear most hub and hobbled in on five wheels. Then had to go back in daylight to search for the wheel

[Mk3iain]

Many thanks all!:saluting:

I have been thinking of getting a torque wrench after finding some not very tight nuts that I had put on a few weeks ago but wanted to make sure. I would rather shell out a bit for the right tool than have one of these wheels overtake me!! I am happy to go ahead go ahead and the wrench and it may come in handy for other stuff. At least I will have peace of mind, jumping on a 4ft bar was not the solution.

 

Cheers

Iain

[griff66]

375 foot pounds is serious torque!!its gonna cost a fair bit to get a torque wrench that goes that high we use large torque wrenches at work preload on a 777 wheel nut is 500 foot pounds and thats hard work to achieve and i aint a small chap!

[Mk3iain]

375 foot pounds is serious torque!!its gonna cost a fair bit to get a torque wrench that goes that high we use large torque wrenches at work preload on a 777 wheel nut is 500 foot pounds and thats hard work to achieve and i aint a small chap!

 

I know what you mean but I had the chance of a Norbar wrench only a year old with little use for £120 that will do the job.

[griff66]

sounds like a good deal

[antarmike]

Or use a smaller torque wrench with a torque multiplier.....