I am with Rustred. Solid lifters can wear from poor lube at the camshaft lobe surface, either cupping or doming from a bad lobe. (not common but not unheard of on a Farmall) The breakage would be way rare. Rockers can and do break. Pushrods can bend, and often do if the valve gets stuck in the guide, but rockers will break if the pushrod is very straight and stiff. My guess would be a tight valve stem to guide, or (possibly) ice in the cylinder!!) If it is the lifter, and you take off the lifter cover plate to replace it, the camshaft is going to require replacement!! Jim
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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