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TD35 and McCormick 70 plow

M

mschwartz

Member
Finished converting the five bottom plow that I had asked about to a four bottom and took it out to a neighbors and plowed out a few acres of old stand alfalfa. Been 42 years since they had plowed that field. Plowed about a foot deep and plow cleaned up and plowed well. I ended up having to replace frogs with other used ones that I had and put new shins, landslides and wear pads. When I bought the plow it had good deepsuck shares and good Moldboards Sure nice to be able to buy new parts vs the older No. 8 and 10 plows with the blacksmith bottoms. Might need to replace a couple of coulter blades, anyone know the rule of thumb for when they are considered worn out? Thanks, Mike
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very nice unit. I see no crank, do you just put the crank In to start it? or pull it?
the coulters are more for sod . they can be lowered as they wear and I believe they can accept a couple inches of wear from new. they also got taken off for plowing stubble and less chance of plugging.
 
Yes I carry the crank under the seat on this one, the cast bearing that holds the crank was broken and i have not gotten around to swapping it out. Tractor also has a starter but I rarely use it, handy when it is really cold out or I have flooded it. Will usually start within three or four cranks. This is the only plow that I have put all of the coulters on most around here just plowed with the rear one to keep a clean furrow. I thought they might help with the alfalfa sod. Plowed pretty hard, lugged pretty hard in spots using second but was actually spinning tracks in those spots when I went to low gear.
 
that's great , I was curious how it pulled. those old diesels have their own unique sound and it hardly changes.
 
How big a jobs was that too, make it into a 4 bottom,i have two 5x16, No70's one is a H bottom and 1 is a X bottom,would like to make one into a 3x18, i know i would have to make a new backbone for it,but dont want to start with out finishing it, with a plan!!
 
actually it was built from 1936 to 1939. I used to have the 1939 model. there was just over 5000 units produced during this time.
the TD40 was produced from 1933- 1949 with just under 6000 units total. same engine with a few more H.P. with bigger bore.
 
If the last bottom on your 5 bottom is a add on beam then it is not a bad job. I moved the tail wheel up to the fourth bottom. Took the lift rod for the tail wheel and rebent the front end and cut off the excess. Someone on this forum suggested raising the plow all the way up to get a starting measurement and that worked well for me. I then used a portable bandsaw to cut off the excess square beam. I did not use a depth wheel after I converted to 4 bottoms. What do you mean when you say H or X bottom? Thanks, Mike
 
Making a 5 bottom into a three bottom looks like a lot more work. I am going to try that myself but it looks like shortening up axles and rewelding lift and leveling brackets. Looks like easier if you have 5 bottom frame that can be reduced to 4 vs the 5 that can be extended to 6 frame. The 6 bottom frame looks completely different and mine have the full castering tailwheel. Would be nice to see some good pics of a three bottom 70 plow.
 
Yes, I fell in love with the sound 25 years ago when I happeneed upon a grower harvesting with a TD40 and pull 51 hillside combine. I hung around watching the combine work and then spent the afternoon driving the 40 while the owner punched header on the combine to finish up the field they were demonstrating in. Took me about a fifteen years to get my first TD40 and the others seemed to find me looking for a home. The TD35 in the picture is a 1937. Had been dissasembled as a parts machine for another when I got it. Cleaned and serviced mag and carb and cleaned and went through the injection pump. After plowing with it the other day I think I will readjust the pump to reduce the return diesel and try to get more into the injectors. Under heavy load I was not seeing any black smoke and the others I have will make a lot of black smoke when they are working hard. Only modifications that I am aware of on this tractor are the 45 degree head and 40 sleeves and pistons.
 
Mike, The H is a high speed bottom, the X is a general purpose bottom, If you look at both plows side by side you can barely tell the H doesn't have quite the twist to the moldboard, as the X. Both my plow are a full beam 5 bottom, and both have the long tail wheel. I have a 450 Lp, was thinking 3x18 would be a nice match. The part number is stamped in the back of the moldboard.! i got a neighbor with a 7x18 so i could use his for a pattern when i make my new backbone,if i get that far !!
 
they really don't pour out a lot of black smoke when set right. should be a grey haze. so you must have that one close. I did some plowing with my wd40 pulling 4/16 plow and it just had a grey haze also and just kept going like an old bull, but had a lot of tire slippage.
 
Would really like to get a WD40 someday. Never seen one in person, guessing they are a lot like a bulked up 22-36. Never plowed with mine yet but guessing they would be more of a three plow tractor. Not many large wheel tractors in the palouse, was primarily crawler country except for the chore or utility tractors. Maybe I will leave the pump on this TD35 alone and just wait to work on the next one. Spent the afternoon pulling steering clutches out of the new T20 so no end of projects. Hope it is a long winter.
 
Thanks for these neat posts. I've never had the privilege to drive a red crawler or any crawler. Seems it would be so neat to do farm work with one.
 
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