jimvw

Member
Looking at a 555 lp tractor.. Did that engine use a higher compression then the gasoline powered tractors? If so was it a difference in the pistons or the cylinder head. Anyone have any experience with these as a pulling tractor? Also will this engine fit into a 33 or 44 frame?
 
(quoted from post at 20:21:55 05/24/18) Looking at a 555 lp tractor.. Did that engine use a higher compression then the gasoline powered tractors? If so was it a difference in the pistons or the cylinder head. Anyone have any experience with these as a pulling tractor? Also will this engine fit into a 33 or 44 frame?

I believe all Massey pistons are flats and LP have specific heads but totally unsure.

What is certain is that a 55 engine will fit in a 44 tub because they are the same PN. The 44 tubs have 4 front holes and the 2 rear front bolts holes bosses are machined for 55 engine. You can do it by grinding in a 44 tub, or even simpler, you can install the entire front frame of the 55 with the motor on the 44.

Doing this you will have to shorten the fuel tank, and if you want to be accurate, you will have to reinstall the lower radiator and front grill of the 44 on the 55. Not sure that it is possible because the valve cover is very close to the hood on the 55s.
 
Beg to differ......the 55 engine will only fit into a long frame 44 tub. They are not
the same block, a 555 engine is 382 cid vs a 260 or 277 44 or 444 engine. The rad
holes and the air intake holes will have to be moved if using the 44 hood, and the
grille on a 55 is nine slot vs. eight on a 44.The steering linkage may also have to
be moved to clear the starter which is on the opposite side of that on a 44. It can
fit but it's not just a simple drop in.
Having said that, I pulled for years with a 55 gas either in the 8000 or 10000 pound
class pure stock antique and won or placed nearly every time. Good luck and have fun!
Ben
 

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