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? about A B's

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Grimreap

01-15-2003 14:42:06




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Hi all: this is probably old hat to you guys, but I was reading a book with an essay on the JD A's and B's from the later 30's - 50's. They were talking about using the flywheel to get it started (turn to TDC and the mag fires starting it up-no "cranking"-certainly sounds easier than it was cranking my Farmall), use of gas (a separate tank) to get it warmed and then switching to diesel, kerosene, or gas for running, a "lever" only clutch and other anomolies. Since my only experience is with Farmall (I recently sold my Super C) and have never look-see the Deere's as far as operation, is this information correct? Sounds like the older Deere's were much different than the others (certainly than the Farmall's) and "simpler" to operate. ????? Are the older Deere's really that different? Any suggestions on the best way to get operating/using instructions if they really are that different? Any help appreciated. Thanks. JEH

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Mike

01-15-2003 20:05:45




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 Re: ? about A B's in reply to Grimreap, 01-15-2003 14:42:06  
Grimreap; I have read all the posts so far and would like to add two things left out. 1- John Deere did make tractors with a foot clutch and you could start with a crank handle,
these might make you a good transition tractor to get bittin by the Green Bug.models like the LA,M,
40,420,430 try one you might like it. 2- The magneto impulse couplings most valuable
feature is to retard the timeing automaticly so you don't get your arm broken.

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Grimreap-thanks

01-15-2003 16:19:55




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 Re: ? about A B's in reply to Grimreap, 01-15-2003 14:42:06  
Thanks for the info on starting. Actually, I never had any problem starting the Farmall be hand cranking from the front (had to do that for couple weeks while the starter was off for fix). Also, understand magneto-one of my gravelies has that-big click when gets to firing position. How about the issue of the hand clutch only, also, will they really run (once warmed up) on diesel, kerosene as well as gasoline? That sounds like good flexibility. JEH

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G-MAN

01-15-2003 17:01:25




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 Re: Re: ? about A B's in reply to Grimreap-thanks, 01-15-2003 16:19:55  
Grimreap, I know you're talking about hand-crank two-cylinders here, so your comment about them running on kerosene and the like is pretty well founded. But, a lot of those old tractors were updated with higher compression pistons and cold manifolds that won't allow the use of those heavier fuels without preignition and detonation when under load. So if you get yourself one and decide to run it on kerosene or the like, make sure it's still got the lower compression pistons in it yet. In later years, Deere went to producing many more gasoline (high-compression) tractors than the all-fuel (low-compression) tractors. The easiest way to tell them apart is that a tractor built as an all-fuel will usually have two fuel tanks - one for gasoline for starting and one for the distillate, kerosene or tractor fuel. Most gasoline tractors have only one tank, although I believe there were some built that still had both tanks, but the smaller tank was used as a reserve for the larger tank. The other way to tell is by the design of the manifold. All-fuel tractors will have the intake and exhaust kind of in one big pile (hot manifold), while they will be separated on a gasoline or "cold" manifold.

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Clooney

01-15-2003 16:43:56




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 Re: Re: ? about A B's in reply to Grimreap-thanks, 01-15-2003 16:19:55  
JEH, the hand clutch isn't a problem if the tractor is used in field conditions but can be a little bit of a pain in tight situations or using a multi lever front end loader & clutch at the same time. It doesn't take long to develop 3 hands.

~ You asked; "will they really run (once warmed up) on diesel, kerosene as well as gasoline? That sounds like good flexibility".... They will run good on gasoline, good on kerosene if the coolant temperature is kept above 200� & not worth beans on #2 diesel unless the coolant is at the boiling point & the tractor is kept under a solid load..

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John T

01-15-2003 16:33:04




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 Re: Re: ? about A B's in reply to Grimreap-thanks, 01-15-2003 16:19:55  
Yep, once warmed up, so the hot mainifold helps keep the fuel vaporized, they were designed to run on the then cheap distillate or drip fuels, which todays kerosene is close to. However, thats why they also had to use a lower compression (less horsepower than if higher) than a gasoline only engine, because the low octane was more prone to pre ignition. John T



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John T (Yeah Right lol)

01-15-2003 16:10:16




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 Re: ? about A B's in reply to Grimreap, 01-15-2003 14:42:06  
Hey Grim, well as much as I love the old Johns and would be happy to report that "Yeah thats all true, they practically start themselves, all you gotta do is turn the flywheel to TDC and the mag fires and they start" BUTTTTT TTTTT lol its not necessarily all that easy. You have to pulllll lllll l that hard cranking heavy flywheel over and past that TDC, which aint all that easy (just like hand cranks aint easy to turn) cuz theres a bunch of compression making her hard to turn. However, I feel its easier to pull that big flywhel over then pull on them shorter (less leverage) dern confounded front cranks. AS far as their magnetos firing, well their mags aint much different then others, the reason they have to wind up a spring to fire at hand crank speeds is because they get their electrical energy by passing a magnet past a coil of wire (coil) and if you very slowly pass it by (like at extremely slow hand crank speed), theres hardly any energy imparted, buttttt the FASTER it passes by the coil, the more. Sooooo oo thats why a spring winds up and when it trips, that magnet then whirls rapidly past the coil and has enough energy for a decent spark. Then, when the RPM gets up to around 250 RPM, the wind up and trip quits working because the magnet is passign by the coil fast enough to fire the plugs. I guess the hyped sales brochures can claim and not technically lie all you do is turn the flywheel and they start, and I find its easier to do that then turn a front hand crank, but its sure as *&^% not so easy as one might believe. Anyway, thats my story and Im stickin to it. Take Care Ol John T Nordhoff in Indiana

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G-MAN

01-15-2003 15:49:24




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 Re: ? about A B's in reply to Grimreap, 01-15-2003 14:42:06  
Grimreap, there is a device in the magneto drive called an impulse coupling. During cranking, the coupling "stores up" energy, and when the coupling trips, the mag spins faster than it normally would at that low cranking RPM, which gives a hotter spark than would normally occur. The loud clicking you here when a magneto-equipped two-cylinder is cranking is the impulse coupling doing it's thing. The whole purpose of the impulse coupling is to make hand cranking easier. If everything is "on" as far as the tractor being tuned, it takes very little force on the flywheel to start the tractor. If the impulse coupling isn't working properly, it gets more difficult, because you have to spin the engine over harder to get a good enough spark to start the tractor. Even the electric-start tractors had a provision for hand cranking. You removed the center of the flywheel coupler and removed the steering wheel. A special adapter allowed you to spin the flywheel using the steering wheel. Not the easiest thing to do, but much better than walking home.

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Steve - IN

01-15-2003 16:22:32




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 Re: Re: ? about A B's in reply to G-MAN, 01-15-2003 15:49:24  
G-Man,

You don't have to walk home with a C or an H Farmall either (not sure I'd wanna try to hand crank an M) -- they've got those spring loaded shafts sticking out front to mount a crank in case the electric start fails. Having messed with the rusted steering wheel nut (yes, I know, I'm the real nut behind the wheel) on my 60, the Farmall setup makes a bit more sense - assuming you've brought the crank along.

I think Grimreap really ought to get one of each! Then he can make himself crazy pushing his foot on a clutch pedal that isn't there on the JD and reaching for a hand clutch lever that's missing on the Farmall. Also, you get to decide whether you prefer the pop over the mellow hum. Another revelation I've learned by having one of each is that red paint generally doesn't cost as much as green or yellow -- but red painted stuff isn't nearly so available, which means your savings are offset by the time spent searching for it -- kind of like searching for the right place to disengage the clutch. In other words -- you'll like both or either of them, Grimreap.

Steve

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G-MAN

01-15-2003 16:50:43




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 Re: Re: Re: ? about A B's in reply to Steve - IN, 01-15-2003 16:22:32  
I've cranked a good stout Farmall M more times than I can count - that was the first tractor I ever drove. Grandpa pulled it out of a tree line on a farm he bought and had it completely overhauled in around 1974 (the year I was born and back when there was enough money in farming to do that sort of thing). I started driving it in probably '82 or so, and the stipulation was that if I was going to drive, I had to crank it (the starter frequently had issues). After a quick lesson about keeping my thumb on the right side of the crank, and another lesson on not putting my arm through the steering wheel to run the throttle, I had a go at it. Thank goodness it was usually tuned up well and started easily, because that thing had and still has a pile of compression. The old H was actually more of a bear to start, because the timing never was quite right and it would occassionally kick back and about kick you in the teeth. We eventually got the timing squared away, but the H sat out for a year or so, and somehow became locked up even though the exhaust was covered. Grandpa started tearing into it, but it's still sitting in the shed, so I imagine I'll have a go at it one of these days. I'd like to overhaul it and paint it up nice for him. The old M could use some another good sprucing up as well.

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Steve - IN

01-15-2003 18:40:35




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 Re: Re: Re: Re: ? about A B's in reply to G-MAN, 01-15-2003 16:50:43  
G-Man,

Sorry if I impunged your handcranking skills. I don't have a crank for my red H - and ain't gonna buy one. The wheel nut is safely loctited on my 60 and I don't have a steering/flywheel adapter. You see, we're not that far from the Dayton Electric Co (DELCO) plant in Anderson and are required to pay homage to Kettering for inventing those electric starter things by using them exclusively (nice excuse, huh?).

Seems to me that Farmalls (H's and M's anyway)also came in gas and dual fuel versions - principles are the same. The letter Farmalls without live hydraulics are nearly as clumsy as a hand clutch for loader work. Also, JD A's or B's with rockshafts are a lot easier to convert to a 3pt than an H or M, and maybe easier to convert than a fast hitch on a Super C. Best setup may be to get a B and a red H - the rear rims and tires are interchangeable. What's more, with an A or B you only have to buy 2 plugs instead of 4, adjust 4 valves instead of 8, and you'll never need to split the tractor or work upside down on the clutch, too (we don't talk about how it's easier to stand in one place and set a Farmall's ignition timing, or how you can stand up and adjust valve lash on this forum).

Outside of that, a row crop tractor spends 90% of its waking hours going the same speed in the same direction - so the main difference Grimreap will notice is the exhaust note, and that he's got to look on the dash instead of the hood to see all the gauges. It's only when you stop to go backwards or forwards that the clutch placement tests your reflexes (and I also notice nobody has said much about how fun it is to back a wagon with a hand clutch, or the fine art of playing footsie with the hand clutch lever).

Steve

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G-MAN

01-15-2003 18:48:27




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 Re: Re: Re: Re: Re: ? about A B's in reply to Steve - IN, 01-15-2003 18:40:35  
No problem Steve, lol. It's interesting that as Grandpa got older, it became more important that the starter actually work, lol. I hand-cranked that thing for years, but yet the last time I walked into the shed and hit the starter button on that M, it fired right up, even though it had been sitting there without being started for who knows how long. I guess that's the way those things go. The starter was always kind of hit or miss. If you popped it into neutral and stood there on the ground while hitting the button so you wouldn't have to climb back off to crank it, it would start. The next time you would take it for granted that it would start and climb up on the seat. Then it wouldn't start and you'd have to get off to crank it, lol. At least with a good old hand-start Deere, you always know what you're going to have to do.

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Clooney

01-15-2003 14:54:11




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 Re: ? about A B's in reply to Grimreap, 01-15-2003 14:42:06  
Grimreap, yep, you read correctly. Set the choke, open the petcocks, close the carb drain, open the fuel valve, set the throttle & turn the flywheel. It's as easy as that.. UNLESS you have 501 C.I. Deere model "D" & the ambient temperature is 10�. That separates the men from the boys..



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