Re: Farmall H woes

Posted by Bob M on October 15, 2004 at 07:48:27 from (165.170.128.66):

In Reply to: Farmall H woes posted by PA Steve on October 15, 2004 at 06:56:09:

Could be the half moon key in the cam drive gear hub has sheared letting the gear "walk around" on the camshaft. When this happens the cam gear will still be correctly timed with the crank, but the camshaft will not be.

I've run into sheared camshaft keys several times on tractors that drive a live hydraulic pump from the cam gear (Super M, 400, etc). However if the cam hub nut was not properly tightened I suppose the camshaft key could shear on a tractor without live hydraulics like your '42 H.

Suggest you remove the cam hub nut then peek down the keyway for evidence of a sheared key.

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