Catpusher@aol.com wrote:
>
> Hi FOT
> Two things came to mind as I changed the TR's axle today for PIR.
>
> The half shaft failures that I have had inboard of the bearing were all
> ones that were not visable before the weekend. I have to change gear
> ratios almost every race, and always inspect the shafts when I do.
>
> I also rinspected the wheel loss axle. The main failure surface
> was approx. 3/16" inside the outter end of the bearing. Thus, even
> with the hub removed it probably would be hidden unless the bearing
> was also removed.
> Just where did the other wheel loss TR shafts fail?
>
> I find that removing the bearing usually scars the
> shaft, even when using the factory brg puller tools. The scars are lined up
> with the shaft, and caused by the brg. I.D. Any thoughts?
>
> I am glad that engineering resources are available for this most serious
> problem. My team engineer is a soil engineer, so we use caution!!
> Regards, Hardy
Hardy, my axle failed within the hub, at the deep end of the keyway at
the stake marks. I understand John Harkness's failure was about 1/2" to
1" inboard of the inner edge of the hub. Both were immediate wheel loss
situations. The other failure this year was on George Wright's TR4 and
his axle broke at the largest diameter inboard of the hub and bearing.
He did not loose the wheel.
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