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Discussion Forum

Farmall Super MD

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04-12-2001 05:57:51

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I am interested in buying a Super MD and have two questions. First, how reliable were the diesel motors on these tractors and second, how hard are they to rebuild?

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Red Rider

04-12-2001 19:42:11

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 Re: Farmall Super MD in reply to Moe, 04-12-2001 05:57:51  
Moe, I have three the the older I-H Diesel tractor a 400, a 600 and a TD9. All three have very reliable and economical to operate. Rebuilding any diesel engine comparied to a gas engine will be more expensive. The difference is that the diesel usually will last longer if you maintain it properly. As far as head problems, I have a lot of hours on these three tractors and have not had any head problems. If you have an operators manuel and follow it you will not have any problems. The governor response is a lot sharper than on a gas engine and under load sure sound good. If you have your pump set right you will get a little puff of smoke as the governor fluctuates under load.

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04-12-2001 19:33:54

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 Re: Farmall Super MD in reply to Moe, 04-12-2001 05:57:51  
Moe, I just rebuilt a Farmall MD. If you really rebuild the engine it can cost literally thousands of dollars. I took mine down to the bare block, replaced main and rod bearings (center main not available anymore), pistons, sleeves, rings, etc. I even had the block hot dipped so it looked like new. The injector pump and injectors are the other pricey rebuild items as you can spend a thousand dollars on them. Adding in a valve job, gaskets, etc. you can spend over $3000. However, when I was done, it was so great to start the engine and see/hear it run so nice. The MD has such a unique engine. Roger

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04-12-2001 19:30:46

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 Re: Farmall Super MD in reply to Moe, 04-12-2001 05:57:51  
I have a Super MD. They are a good reliable tractor. The trick is letting them warm up good and not using too much throttle when switching to deisel and allowing them plenty of time to cool befors shutting them down after working them. I just found out that IH recommended switching them back to gas before shutting them down. Been doing it wrong all my life. Not many Super MD's around. Good Luck

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04-12-2001 15:03:52

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 Re: Farmall Super MD in reply to Moe, 04-12-2001 05:57:51  
..depends on how the work on it has been done over the last 47 years.(just as anything that old)
When new they were as good as money could buy in the rowcrop types. Only real consern, as mentioned, was allowing time for warm-up and cool-down on HEAVY work to prevent cracked heads. Expensive but a joy to drive under load. H

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04-12-2001 13:38:57

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 Re: Farmall Super MD in reply to Moe, 04-12-2001 05:57:51  
The MDs were reliable tractors. Some say they are prone to cracked heads. That is about the only problem other than normal diesel type problems like the injector pump. I have an MD, but have not done any major work to the engine. I do know that injection pump repairs will be expensive and also the engine rebuild parts are expensive and not easy to find. The gasoline Ms are much cheaper to rebuild.

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