Stuck, got about 10 mm wiggle back and forth, but stuck.

[Jaeger_S2k]

I'm putting my Lodestar back together, and everything went swimmingly.
I was left with 5 bolts, and I know exactly where they go; that was a surprise.
Fitting the suspending hook, mounted the hook into its carrier, drove the lock pin through the nut, lovely.

Then there are 2 x 13 mm (they look fine thread) 12-point bolts that hold the hook assembly to the lift body.
So these are very important, and I'd suspect strong bolts going into some floating (as in, free to slide back and forth) nuts. So I need to be careful with them.

Cleaned the blue thread lock off the threads, ran them bare through the nuts to clean them, squirt of alcohol and a blow dry with air.
Seated the hook housing into place, blue thread locked the bolts, gently placed them into the holes and turned by finger to seat.

Then impact to run up but not tight, first bolt great. Second bolt stopped short, now no matter what, it won't move, well no it does move it moves around 10 mm then locks, then 10 mm back and locks. I've had a hammer on it, my impact has surrendered, and I've had 24 mm ring spanners on the 13 mm ring spanner to give me a longer lever. Don't have a wrecker, but I don't think it'll make a difference.

I'm suspecting a foreign body has entered the thread and is locked sold, but it does move. Is that cross threading fine thread?

Planning forward, I have an air impact wrench 1/2” but no smaller sockets in 1/2", but they can be bought.
This feels like a brute force attack will be necessary, unless there are better ideas.
I've got heat, propane torch and oxy/propane, if needed.

All this torquing about and boots on for leverage, is ruining the paint job but that can be fixed. I can't hang this thing off one bolt!

 

[Keithmac]

Just be careful you don't snap the head off with the big impact gun.

May end up having to drill it out if the threads have galled up.

 

[Jaeger_S2k]

Just be careful you don't snap the head off with the big impact gun.

May end up having to drill it out if the threads have galled up.

That's my fear, but what other forms of attack are available?
It's not seized with rust, it's not got thread lock (blue but not set), it's not been in there more than hours.

 

[jimbo84]

Has winding it in with the impact galled the thread? If so brute force will be required to get it out but either way the thread will be fubar.

 

[dave h 2]

The nut thread may have disintegrated or being as 10 mm is a usual nut thickness, this bolt should have been shorter and winding it on with an impact has damaged the bolts thread by bottoming. Consider making a C washer to fill the gap and see if the bolt tightens properly?

 

[Jaeger_S2k]

Has winding it in with the impact galled the thread? If so brute force will be required to get it out but either way the thread will be fubar.

It must have done, I was careful with the whole thing. Just a silly mistake.

The nut thread may have disintegrated or being as 10 mm is a usual nut thickness, this bolt should have been shorter and winding it on with an impact has damaged the bolts thread by bottoming. Consider making a C washer to fill the gap and see if the bolt tightens properly?

I turned it on it's side, and the 10 mm lateral wiggle is the nut shifting in the keeper.
It's quite open and hasn't bottomed out.
Just put in by a numpty! So angry with myself!

 

[Keithmac]

These things happen, don't be too hard on yourself!.

I've had bother in the past with stainless threads galling up, a real pita..

 

[daleyd]

Stainless is a pig - used to work for company that made thermal oxidisers and dryers, so lots of high temp stuff with loads of ss inspection plates, thermocouple fittings

We used to fit brass bolts on inspection doors so that if they did gall up you could at least stand a chance of drilling the bolts out, not always possible in every case of course. Stainless bolt binding up in a stainless nut was horrible, as were the thermocouple fittings when they went into a stainless coupling.

Did a job with a guy a couple of years back and he was so proud of the stainless bolts and nuts he had bought saying they would look lovely (job didn’t need them, he just thought they would look nice). I told him he was mental, and should have just got some bzp - he of course thought I was being a drama queen, but changed his mind 2 days later when we had to spend 2 hours drilling one out when it nipped up.