Broken rocker shaft

Keith LeMire · May 23, 2010

Has anyone ever seen a rocker arm shaft on a Farmall M or SM broken at the thru hole where the supports are? If so is it a problem? The shaft seemed to be securely clamped in the support until I removed the bolts. I suppose it could work it's way out, but evidently it has not moved, since the tractor was running fine when I took it apart. I will replace it regardless, but I was just curious if this is a common occurrence.

DeltaRed · May 23, 2010

I had an F20 do that.it had sat a while,a valve had stuck,when the crank was turned,the cam pushed, the valve stayed,the rocker shaft broke.

Janicholson · May 23, 2010

As noted by DeltaRed, they can be broken. Tightening the mounts with a stuck valve, or something out of place can also do it. Jim

Broken rocker shaft

Keith LeMire

New User

DeltaRed

Well-known Member

Janicholson

Well-known Member

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