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Farmall & IHC Tractors Discussion Forum
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Got my MD home today!!!

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jonnnny2006

05-20-2007 23:29:54




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Ok I got a good couple of questions for you guys. I got my MD home and it would not start on gas. it has the magneto and I went to check for spark and took a jumper cable and grounded out a new spark plug hooked up to the dist. and I did not see a spark. it was pitch black out when I was looking for the spark. so i took the cap off and on the rotor the was massive carbon buil up! I was supprised that it would even get so bad it was like 1/2 inch thick all the way accross. So i cleaned it and put it all back together and checked for spark again, the was no spark. I then took the magneto off so i could take it apart to see if i could see somthing wrong with it. Well it all looked to be intact. But the metel part that makes a conection with the cap was corroided a tad bid, not real bad. any way i had it in my hand and i turned the mag by hand and i could feel it clicking apporox two times per revaloution. So i went ahead and put my finger on the contact that was a little corroided and got a heck of a shock! and i was barley turning the thing! so can a one tell if the mag is good just by getting a good jolt by barley turning it? i have always had a coil dist set up. also what is the wire for that comes out of the mag on the front of it? I am going to get the books on it soon. but i figured mabey one of you guys would know. also we tried to pull it on the diesel side and it popped and smoked white but it just wasent warm enough to run. so im excited to get some spark into her. it is a 1950 md. it has a nice wide bucket and a handy nine speed, with fsctory power steer. i cant wait to take her for a spin.

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jonnnny2006

05-21-2007 20:02:01




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 Re: Got my MD home today!!! in reply to jonnnny2006, 05-20-2007 23:29:54  
I just wanna take a second and THANK EVERYONE for being so helpful and nice. I have always had an intrist in old farmall tractors. my dad took me to south dakota where he grew up on a couple thousand achers and right on BIG STONE LAKE. The little town is called wilmot. I can rember it like it was yesterday, I was 4 years old and my dad took me to this big shed that looked to me like a loaf of bread. Inside was this huge tractor. ( it looked huge to me because i was little and the H had a straw stacking loader on it) He went over to the ol H and it probally wasent ran for months or even years and he hit the starter and it turned over sooo slow. After about 5 times trying it she fired right up! It was very loud as it had no muffler. my dad raised the bucket up and down a few times and then shut it off. I will never forget the sound the smell and how every thing was that beautiful sunny blue sky day with rolling hills and the lake down the hill. I thought i was in heaven! I guess it would be hard not to like the old farmalls after that day. If it were up to me i would have a farmall for my car if i could! when i go to town to get food from the store if it is nice out i ALWAYS take one of my tractors! I have always been fond of farmalls but up until recently i did not have a place in the country to run em. now i do. I try not to let money from stopping my passion for collecting farmalls. I promised myself i would get 2 a year till i die. Im gonna be 30 on aug. 13. I currently have a 43 H (duel fuel) which was my first. then i got a very nice 1 owner 53 stage 2 super H with wide front. Then i bought a H with a artsway 72 inch finishing mower under her belly she is a 44. And just yesterday 5-20-07 I brought home a 1950 MD. I havent herd my md run yet but all in due time. I try to get every thing to work as it did from the factory. I will keep you guys posted about my progess. I will have to retime her as i dont rember what plug the rotor was pointing to. no big deal it wont hurt to get it retimed any how. THANKS AGAIN EVERYONE!

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sflem849

05-21-2007 19:25:37




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 Re: Got my MD home today!!! in reply to jonnnny2006, 05-20-2007 23:29:54  
I can pull my MD stone cold and it will start. Just my .02 It probably doesnt help that it has about NO compression.



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CRUSADER

05-21-2007 09:30:54




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 Re: Got my MD home today!!! in reply to jonnnny2006, 05-20-2007 23:29:54  
Glad to hear you got it home, it must have been fun loading it with the loader on it. Good Luck with it.

Jim



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Haas

05-21-2007 06:57:58




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 Re: Got my MD home today!!! in reply to jonnnny2006, 05-20-2007 23:29:54  
Be aware that the magneto rotates counterclockwise(facing the rotor), opposite to what you normally expect. So..you need to connect the plug wires accordingly. Have you checked the points to see that they are properly set?? If you got a shock, I would think the mag only needs some tuning up. Also, the point cam in the mags has only two lobes, so there is gearing between the cam and the rotor. You must have the timing correct so that the rotor points to No. 1 plug wire contact when the No. 1 cylinder is TDC of the compression stroke. Be aware that on the MD, changing to gas side does four things. 1) changes butterflys in the manifold to direct air through the carb. In diesel mode, air does not flow through the carb. 2)Turns the ignition on. That is ungrounds the mag. In diesel mode the mag is grounded to stop the spark. The switch is in a chamber at the front of the manifold. 3)Releases the carb float to allow gas to flow. On the diesel side the float is locked up to stop gas flow. 4)Opens the compression release valves to the spark plug chambers to reduce compression. In diesel mode, the valves are closed. Also, check the plugs to make sure you have the correct long reach Champion D89 plugs. These have a long electrode to facilitate combustion in the chamber that is restricted. They will cost around $8 each. When you have everything right, the MD should start in gas mode with only a turn or two. Mine requires full choke to start and then fiddle with the choke as it warms up. There is no throttle control except by removing the carburator and adjusting a plate inside. Keep us posted.

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El Toro

05-21-2007 03:56:05




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 Re: Got my MD home today!!! in reply to jonnnny2006, 05-20-2007 23:29:54  
Are you referring to the coil wire that is connected to the mag and the other end of the wire is connected to the cap?

I hope you made a note or sketch where the rotor was pointing when you pulled the mag. If you didn't you will probably need to bring No1 piston
to TDC on the compression stroke. Then turn the rotor to the No1 plug tower. You should clean those points with some 320 wet or dry until shiny.
Be careful with the gears in the mag. Hal

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