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Farmall & IHC Tractors Discussion Board |
Re: SuperM cam gear and shaft
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Posted by Bob M on November 24, 2002 at 05:07:01 from (24.169.120.229):
In Reply to: SuperM cam gear and shaft posted by Bart on November 24, 2002 at 03:08:37:
Hey Bart - We encountered the same thing (badly worn camshaft keyway) on a buddy's 400 a few weeks ago. Solution was to tack weld the new key into the damaged keyway, then install the new gear on this "repaired" camshaft. On my Super M (which I had to relace the cam gear several years ago) I found one side of the camshaft keyway missing entirely - apparently it had chipped out when the gear came loose. Not wanting (or being able to afford...) to replace the camshaft, I installed the new gear and key so one side of the key was against the remaining good side of the keyway. Figured the key only keeps the cam gear located until the cam nut is tightened. Once that nut is tight, the camshaft torque load is taken by friction between the back of the cam hub and the gear's rear hub face - the key is just along for the ride. So the damaged keyway would not be a problem. I must have been right because the SM has since accumulated a couple hundred hours of operation and is still running great. Some of those hours were with heavy hydraulic operation - operation that causes the most stress on the cam gear and hub. Good luck with yours!!
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