Front wheel bearing adjustment

D

David Chapman

Guest
Just been replacing the front wheel bearings on Amphicar, as you probably know
the adjustment is important, too tight and they cook, too loose and the wheel
wobbles. The correct adjustment is tighten to 22lbs torque and then loosen by 60
degrees, this leave the hub nut just loose enough to turn. You then lock it with
a split pin. Of course the slots in the nut never line up with the split pin !
The correct way to fix this is to grind down slightly either the face of the nut
or the funny shaped washer behind it but somethng I forgot about (because it's
always covered in grease) is there are in fact 2 holes in the axle, one
horizontal but also one vertical. If one doesn't line up the other one will and
should mean you don't have to grind anything off the nut or washer.

Also, fitting the metal cover on the end of the axle is always a pain because
air gets trapped underneath it. What I've done this time is drill a very small
hole in the end (about 2mm) which allows the air to escape so the cap just
pushes on. I then just put a very small self tapping screw in the end to seal
it, looks to work well !

David Chapman in the UK
 
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