On a SM the change from double bend shifter to single type bend was made when the battery box was moved to under the seat. It was one of the changes made to install the engine driven hydraulic liftall attachments. Changes to the tractor chassis were made on regular SM F-28175 or L-504802 and higher serial numbers. First built sometime in march of 53. Changes were made to the chassis after the serial numbers even if the tractor was still equiped with the transmisson driven hydraulics.
Shifter could be a replacement to the tractor and thats the type someone installed also. If just looking at the bends part of the M tractors used single bend ones. Also the H, SH.
On a M I think the double bend levers started showing up sometime in 1947. Have to look in my note book to double check.
This post was edited by D Slater at 03:04:58 09/23/11.
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