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mf 750/760 to 1135 engine swap

C

coastalbend

New User
My 1135 lost the motor this summer. I am considering rebuilding but have some offers of perkins motors from 750 and 760 combines. This is our yard tractor and does not see pulling excpt getting the occasional motorist unstuck from the ditch. We have a forklift mounted on the 3pt and it does lots of tasks. Will the combine engines work? Dont have the new motor local to look at. Not a perkins man, mostly jd. I learned to drive tractor in this one so would like to keep it around.
 
The combine engine does not have the strength in the block that the tractor engine does. Notice that you can see the outline of the cylinders on the combine engines, where the tractor engines are all basically solid. This is because on the tractor engines the block and oil pan are the frame. Depending on what is wrong internally many of the internals are interchangeable, but the heads/manifolds are different, and I think that the front noze of the crankshaft is different on the combine engine than the tractor engine is.
 
The Agco parts list shows the tractor and AT6-354 combine engines used the same crankshaft, but the pulleys change. Short block assembly part # is the same for both also. The manifolds and turbo are different though. Not sure what else, probably water pumps, didn't look that far. Makes sense the tractor needs a heavier block, but then the part # for the short blocks should change too.
 
A 760 combine with engine serial number 3541UA9443T and up has the same bare block part number as a 1135 (part # 741315M91).

The 760 with engine serial number prior to 3541UA9443T, and the 750 combines have different bare block part numbers than what's used in the 1150. The non-turbo 750 combine uses a Perkins A6-372.4 diesel engine. The 750 "gasser" uses a small block chevy V-8 engine.
 
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