Posted by forty40 on January 20, 2013 at 06:59:49 from (74.77.12.246):
On a JD A, does the camshaft bearing on the flywheel side absolutely need to be a press fit on the camshaft?
The race is pressed into the cap which would be the same application as with any wheel bearing where the bearing itself slides easily on the axle pin and the race presses into the hub. In stock cars, axle rpm is quite a bit higher than JD 2 cylinder rpm and we often slide into the turn at over a 100 mph and never have wheel bearing failure.
The clutch side can be understood why it is pressed on the cam because the race just slides into the case.
What kind of disaster awaits if the flywheel side of the cam is polished for a .0005 sliding fit? Inexperience makes me fearful of polishing the shaft down because camshaft replacement is a whole lot of work.
It would sure make assembly and disassembly easier if the bearing were a thumb press on the cam.
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