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- Apr 1, 2017
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- 361
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- 137
The castellated half shaft nut to shear off it's split pin, work its way off and then allow the half shaft, drum and wheel to come away...……
Asking for a friend...…...
Asking for a friend...…...
POSSIBLY, if the nut wasn't done up tight enough, thus allowing free-play to build up in the hub which would work against the nut, and turn the nut enough to shear the split-pin. When the nut is done up to the point that the hub torque (pre-load) is correct, the nut is TIGHT, to a point that it would be difficult for it to undo and shear the correct size split-pin---was the correct size split-pin fitted?
POSSIBLY, if the nut wasn't done up tight enough, thus allowing free-play to build up in the hub which would work against the nut, and turn the nut enough to shear the split-pin. When the nut is done up to the point that the hub torque (pre-load) is correct, the nut is TIGHT, to a point that it would be difficult for it to undo and shear the correct size split-pin---was the correct size split-pin fitted?
...….happy to be educated though if someone can explain.....
......I'd be happy to be educated too, but I missed too much skool.
I would carefully check that the rubber hasn't become detached from the "star" of aluminium carried on the driven hub spline. If it has, there could have been rotational movement which affected the big, dished, star-washer nder the castellated nut and that might cause it lo loosen.
I don't mean that I have ever seen this but just venturing it as a cause.
At the moment all I have is a wheel, drum and half shaft with stripped threads.…….
I will check as I am awaiting to actually see the vehicle in detail to strip and get an understanding of what caused this (to me) catastrophic failure...….
At the moment all I have is a wheel, drum and half shaft with stripped threads.…….
I will check as I am awaiting to actually see the vehicle in detail to strip and get an understanding of what caused this (to me) catastrophic failure...….
At the moment all I have is a wheel, drum and half shaft with stripped threads.…….
Ok a little more info. This is obviously my car, at the time of incident the car wasn't being driven it was actually on an 'A' frame being towed by myself behind our motorhome. It was early morning and due to little traffic and aid from google maps I dragged the poor little thing for 7.1 miles before I was alerted to the fact I had lost the wheel. I can hear you all cry, how the hell did you not realise! It is rather a large motor home and despite the missing wheel there was no extra noise or drag on the van. It has worn the back plate down to half and worn the bottom of the swing arm away...….luckily there is no further damage to the car just a little dent in ones pride...…
I'm not normally prone to such abbreviations, but OMG
That must have been so upsetting. The best way to forget it is to fix it ASAP but take your time to get it right. And I wouldn't fall for the thought, "While I'm at it I might as well do a proper job," and end up with half the car stripped down and off the road for ages.
The towing aspect may give clues as to what caused it and my first thought is there may have been drag caused from the driveshafts; maybe the car was left in gear or somehow a gear became partially engaged?
In any case, once it's rebuilt properly I suspect this is a one-off, never likely to happen again...especially since you'll be driving it everywhere in future, won't you?
There's only two people I would less loose on the mechanics of my car and one of them is a young guy also called Al.- the only person I trust to work on my cars is an old guy called Al.
Al.