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1939 A ...help me!

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Ben

01-27-2003 14:41:41




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im 16 and just got my first john deere a 1939 A hand start model, it needs a little work and i have a few questions that might sound stupid. #1 where is the oil dipstick? does it have one? #2 where do you put the oil in? does it go in the vent pipe thats sticking up behind the dash under the steering wheel? i removed that and there was some kind of wire mesh screen in there then a hole to put something in...#3 it has a wico magneto and there is plenty of spark but is there no on-off switch?? when i start this thing how do you turn it off??? and #4 whats the procedure for starting a hand start model? i know i have to open the valves on the side of the block but is there anything else i should know? thanks BEN

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TX Denny

01-28-2003 07:05:20




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 Re: 1939 A ...help me! in reply to Ben, 01-27-2003 14:41:41  
I've got a 46 All Fuel. It does have electric start but will only start by following the procedure shown below. Crank it over about three times and then back off the starter. Usually, right before it stops turning, it fires and takes off. Throttle almost wide open but not quite. As soon as it fires, the governor will pull back the throttle to near closed. Until I used this procedure recommended by a friend in New Ulm, MN, it was really hard to start. It actually becomes starting as by hand but using the starter. Good luck!

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A Man

01-27-2003 16:41:33




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 Re: 1939 A ...help me! in reply to Ben, 01-27-2003 14:41:41  
A John Deere was my first tractor I got mine when I was 15 boy that was many moons ago good luck and be safe



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thanks john T and bj

01-27-2003 15:48:32




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 Re: 1939 A ...help me! in reply to Ben, 01-27-2003 14:41:41  
thanks john t and bj you were both very helpful! i really like the old tractor my friends say it looks like a pile of rust but i think she is beautiful. i think i may need to set the magneto like you talked about john T because i tried to start it sunday and it would almost start then run backwards. i didnt know if the magneto was working so i figured the best way to find out was hold the wire and turn the flywheel, all i can say is it hurt like HECK!!!! hopefully it will run soon it sat in barn for 10 years. thank you again

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John T

01-27-2003 16:16:21




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 Re: Re: 1939 A ...help me! in reply to thanks john T and bj, 01-27-2003 15:48:32  
You're sure welcome young man. PS, if its set a long time, I would drain the fuel and refill with fresh clean gas and also let the carb drain and refill it with fresh gas by opening the petcock at the bottom of the bowl, and when you add new gas, leave it open a while to flush out. I would at least remove and clean the plugs and/or even install a fresh new set. I would also change the oil and filter and drain, clean, and refill the air cleaners bottom oil bowl reservoir. If the flywheel does that often, the kick and run backwards as you said, the mag probably needs to be retarted a bit (rotated CW). Be careful with the old girl and exercise safety and keep ur wits about you and your head on straignt around her. Ol John T

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John T

01-27-2003 15:33:35




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 Re: 1939 A ...help me! in reply to Ben, 01-27-2003 14:41:41  
Hi Ben, Im proud of young men who love old tractors. At the last gathering of the Green in Moline, Illinois, I had supper with the Gotschalk (something like that lol) brothers who are well known junior tractor pullers. When I got home I told my then 16 yo daughter I wanted her to go with me to the next tractor show, and meet some fine young men who owned some NICEEEEE E pulling tractors, but she wasnt all that excited lol about what she called "tractor boys". Heres some of your answers.

No, it has no oil dipstick, down on the pulley side of the tractors crankcase there are drain cocks that open and you add oil until it runs out the top (full) and it needs oil added if none runs out the bottom (low).

Some mags have a kill switch which is simply a wire and grounding switch that hooks to a side terminal post out the mag (many dont have that kill switch or post out the mag at all) and if that wire gets grounded, it kills the spark.

If your mag doesnt have that terminal, its best to shut the tractor off by turning the fuel off and let her run out of gas, at either the sediment bowl shut off, if it has one, or else the brass 3 way fuel/gas/off valve if shes an all fuel. However, that 3 way brass valve can be a leaker and/or problem, so its best to use the sediment shut off if it has one.

Starting, they are all a little different, but YES open the side petcocks for less compression, set the choke at 7/8 to full, set the throttle open some but not a lot, crank her maybe 2 or 3 times and then open the choke some to avoid flooding. HOWEVER, this is like very general and depends on the temperature etc etc etc etc and every guy on here will have a different recommendation lol. If you see a lot of gas blowing out the petcocks, it may flood, so open the choke. Be sure you have good clean fresh spark plugs, I like Autolite 388 in styled tractors. You dont have to work ur *&^% off and try and crank her over fast, just pull the flywheel over past compression and let it do the work. If the flywheel wants to kick back and run backwards often, retard the mag timing a bit by loosening it slightly and rotating her CW to retard the hand crank spark timing.

Post back any more question, and many of the fine good ol boys on here will try n help you out. Good Luck, Ol John T nordhoff in Indiana

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gwh

01-27-2003 18:23:24




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 Re: Re: 1939 A ...help me! in reply to John T, 01-27-2003 15:33:35  
John, A '39 A engine is the same as an unstyled, Ben's tractor should have 7/8" thread spark plugs. gwh



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John T

01-27-2003 19:55:08




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 Re: Re: Re: 1939 A ...help me! in reply to gwh, 01-27-2003 18:23:24  
Thanks, gw, I wasnt sure which the 39 was, the B went styled then. I like 3077 in unstyled. John T



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gwh

01-28-2003 04:41:09




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 Re: Re: Re: Re: 1939 A ...help me! in reply to John T, 01-27-2003 19:55:08  
John, The styled A for '39 was reworked '38 unstyled A,in fact some unsold '38 A's were brought back in to the factory and rebuilt as styled '39's. The '39 and earlier used a 309ci engine(5 1/2"x6 1/2"), for the '40 model year the 321ci engine (5 1/2"x6 3/4")came out w/18mm sparkplugs and still a 4sp transmission the 6sp would wait until the '41 model year. gwh



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BJ

01-27-2003 15:05:40




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 Re: 1939 A ...help me! in reply to Ben, 01-27-2003 14:41:41  
On the right side just below and ahead of the belt puley is the plug to check the oil level just loosen a couple of turns and see if the oil runs out and yes the crankcase breather is where you add engine oil just pull out the mesh screen and add oil and to stop the motor just shut off the gas at the sediment bowl or with the three-way valve if it still has one and let it idle till it dies



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