stripped threads on stub axle

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whelanrob
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Joined: 10.11.2003
Location: ireland

While trying to torque the outer slotted nut on my new cv joint ,in my front axle,to the specified 200 nm ,the threads of the stub axle stripped.
So has anyone any good alternative ideas on how to lock the inner slotted nut and if so ,how could you adjust the play of the wheel bearings,or maybe there is an alternative locking method I could employ
bob

Rustbucket
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Joined: 17.12.2003
Location: Penicuik, Scotland.
stripped threads on stub axle

Oh Dear, Bob ! I take it only the outer nut is stripped and you still have thread on the inner nut and portion of shaft. It's a while since I've been in there but is there enough remaining thread on the end of the shaft to move the final position of the outer nut back using a spacer. Or better still if you can find a castlated nut (or make one up), use the old nut as your spacer ( just file it to clear the shaft ) and bore a hole in the shaft to take a splitpin. As I say can't remember if there is any spare thread on the end of shaft. Hope you hav'nt damaged the bearings. Better check out your torque wrench. Good luck.

whelanrob
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torque wrench

Thanks Chazz,my torque wrench was borrowed from the power station where I work,is reasonably good quality,(norbar 550),in very good condition and has its calibration checked from time to time.I feel that where I went wrong was in greasing the slotted nuts prior to fitting,even though this is as per manual.Dutch on the benzworld site put his finger on this one.

"Or there was grease in the threads. This will mess up a torque measurement. While you will obtain the correct "tightness" with dry threads at 200nM, greased threads would probably only require 100nM (a guess) to get the right "tightness". Torquing that greased thread to 200nM would produce a whole lot more pull on that thread in the direction of ther shaft; and could strip it. Been there on another project one time."

I like your ideas,but my initial attempt will be to try and find an alternative nut ,possibly with a rim for staking into the groove on the shaft,as a locking mechanism,as this would allow me carry on without dismantling again.To drill the shaft for a splitpin requires removal which I hope to avoid.But if all comes to all I may have to go with your idea so thanks anyway
bob

Rustbucket
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stripped threads on stub axle

To be honest I don't like this setup for adjusting the roller clearance as when you come to tighten the locking nut and it pulls everything up you find the clearance is too tight and have to start again. Don't think I'd be bedding in my new bearings with that torque figure either. It's only to make sure everything is hard up and in position.

whelanrob
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bearing adjustment

I agree ,it seems to be a real hit or miss affair to get the bearing play adjusted by following the method in the manual

Bill Moss
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Joined: 08.11.2003
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Wheel bearings

I have found the following method best so far.
Make sure all bearings are fully on the respective faces, turn first nut over tight usung long nosed thin pliers and a screw driver passed through it turning wheel to feel play or tight as you do. turn back one flat, place lock washer over stub and observe nearest tab to lock position, remove washer and bend tab over to 90deg, place back in ensuring fully home, turn outer locking nut on and tighten using same method, take specialy made tool ie thin screw driver bent over as a hook and pull locking tab of washer out over nut, insert flat screw driver and excert as lever to ensure good contact, so far I have had good success with few recalls.