We had a 450 gas back in the day, '58 I believe. We bought it used in '62 or '63 or so. Tractor had a lot of issues early on in it's life. When we bought it it had just had it's 3rd engine overhaul & 2nd rearend overhaul. IIRC on the 2nd rearend overhaul the dealer used a lot of the updated 560 parts. Engine had oversized pistons & sleeves, new crank, cam & head.
We ran it till '71 when I traded it & a '54 SM that we had had since new for a '67 806D. All the years that we owned the 450 it never gave us any problems other than the power steering had a "catch" in it at times. Not a problem till you were cultivating small crops at low engine speeds.
In '67 we bought a new 656 gas. That old 450 would pull rings around that 656. The 656 was a turd when it came to hp but was a lot more comfortable to operate than the 450.
The 450 was more of a horse than the SM. How much of that was the oversized pistons (SM had 41/8" Firecraters) or just difference in tractors I'm not sure. We pulled a 3x14" #16 plow with the SM & a 3x16" fast hitch plow with the 450. 13' disc with the 450 & a 9' most of the time with the SM. 14' field cultivator with the 450 & a 11' with the SM. Usually pulled the implements in the same gear with the respective tractor.
I a;ways regretted trading the SM off. Partially because it was the first tractor I ever drove in the field as a kid. In the last few years I have bought a '49 M, '53 Stage 1 SM, '53 Louisville Stage II SM, & a '54 SMTA to play with. Have never had a desire to buy a 450 but that might change someday.
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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