Scott Tilton wrote :
> I don't think these bolts really shouldn't see much in the way of
> axial load.
> Unlike a head stud or a wheel lug which gets pulled on. Most of
> their stress
> is in a shearing direction.
While I agree with that, it's important that these bolts clamp the U-joint
yoke firmly to the driving flange, as otherwise it will move back and forth
every time you shift or left off the gas. Note that they are special bolts
(the shank is enlarged to fit snugly in the hole), and nyloc nuts which
should be replaced every time they are removed.
I had problems with the driveshaft bolts on my TR3A loosening (probably a
driveshaft balance problem), so I switched to a higher, all metal grade of
interference nut. I see TRF sells these as P/N GHF243, but I got mine at
the local "aircraft surplus" store. They are reusable many times, although
eventually both the nut and bolt will have to be replaced.
Randall
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