M/SM;400;450

DeltaRed · Oct 17, 2017

Any body have any combination of thes tractors? how do they compare? I have a '45M,and a '53 SuperM with450 pistons. The 'super' easily has 1/3 more power than the M.Bought a 400(lpto/TA delete) last spring. Havent really used it yet. But it seems to be pretty 'salty'.But is it geared high!Never driven a 450. Thanks,Steve

rustred · Oct 17, 2017

i have all 4 of those,but the 400 and 450 is the W series. had the w450 diesel on dyno couple months ago and it was producing 50 h. p. no dought the 450 is a better unit than the m. especially with power steering. plus live pto. and a miser on fuel.

Janicholson · Oct 17, 2017

They seem to my seat of the pants to be 10 to 15 % stronger in each generation. From Nebraska tests, M=36.66, SM=46.26, 400=50.78, 450 55.28, The H derived 460=49.47, 560=63. Jim

Roger Tomfohrde · Oct 18, 2017

Quoted from my Dad" the 400 when new could not keep up to the enhanced M, so the 400 got enhanced. When the 560 came around he said at least he did not have to put in the clutch with the one row Fox chopper when chopping as the enhanced 400 couldn't do it." I believe they put 450 pistons and sleeves into it. The addition of the LPTO took the extra HP from the tractor unless you had the seasonal disconnect which people usually welded them. The last two 560s I owned had sleeves and pistons from a 706 in them. Really wakes them up. Talking gas tractors here.

BarnyardEngineering · Oct 18, 2017

If you could drive each tractor factory new, you would probably notice a distinct progression through the models.

In 2017, all bets are off. These tractors have all been overhauled multiple times by now, with blocks decked, heads shaved, oversized sleeves, pop-up pistons... Then factor in that the engine could be getting tired on its current overhaul, and it's pretty easy to see why they're all over the map now.

D Slater · Oct 18, 2017

All tractors listed have the same constant mesh, ring & pinion and bull gears ratio. Standard transmission gears in the tractors with gear teeth driving another transmission gear listed first. SM and SMTA to 450 does have 4th gear overdriven. SMTA, 400 and 450 use the same speeds. First M and SM 19-44, 400 21-52, 2nd M 23-40, SM 24-39, 400 28-45, 3rd M 26-37, SM 28-35, 400 32-41, 4th M 29-34, SM 33-30, 400 38-35. After mostly normal engine rebuilds with over counter parts through the years for gasoline tractors and good condition engines SM and SMTA engines are around 2 to 4 HP less than a 400 or 450. If a new 400 or 450 camshaft was installed at rebuild 2 to 3 HP less. M tractors a little less. 400 and 450 engines with gas heads should make the same power now. Other than normal rebuild parts or tune cam shift things around. Do think the hydraulic system when not in use on 400 and 450 robs more engine power than the others. IPTO and heavier transmission gears in the SMTA and T/A may create a little more friction.

John M · Oct 18, 2017

Our M would do almost everything our SM and 450 would do, but the M was built, but we didnt use them for heavy tillage. The M was the main cultivating tractor, the SM pulled the planter, the 450 was used mostly on the auger, but it pulled the trailers to the silo, then hooked to the auger. The M would pull the trailers as well, but it always had cultivators on it up until we started our hay business. By then, the SM and 450 were gone, long gone, and replaced with the 2 706s, and the 3020 JD.

fastfarmall · Oct 18, 2017

But the later 400's and all 450 had a lighter wrist pin's [above 31,329 on a 400] so the later 400's had the 48.12 on the drawbar !

M/SM;400;450

DeltaRed

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rustred

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Janicholson

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Roger Tomfohrde

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BarnyardEngineering

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D Slater

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John M

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fastfarmall

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