Farmall M crankshaft main bearing original specs

RMcCoy · May 28, 2008

I have a farmall m (1952) and am looking for the original specs for both the main bearing diameter as well as connecting rod diameter.
I am told that there are two different crank shafts for this tractor depending on model.

Anonymous-0 · May 28, 2008

First get a service manual, next a "good" machine shop will have the specs. Only difference I know about is between M and MD, but I've been wrong before (alot).

El Toro · May 28, 2008

Prior to SN 278050 2.7475"-2.7485" for the mains
& 2.4975-2.4985 on the rods. From SN 278051 & up
2.8075-2.8085 on the mains & 2.5475-2.5485 on the rods. You need to get yourself a good shop manual and have that crankshaft measured for wear.
Your auto machine shop can determine if the shaft needs to be ground and if undersize bearings are required. They can supply the new bearings too.

Have the block dipped and cleaned and new cam bearings installed or you will have a low oil pressure issue. Have them do the head. Hal

Farmall M crankshaft main bearing original specs

RMcCoy

New User

Anonymous-0

Well-known Member

El Toro

Well-known Member

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