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Allis B

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Duane

12-25-2000 15:22:44




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I have a 1938 B with crank start only. I was thinking of connecting an electric motor (120vac) to the belt pully or PTO and using it for starting the tractor. By sitting on the tractor with the clutch in and the pto lever engaged the electric motor could be started and then let the clutch out. When the tractor engine starts push in the clutch, turn of the electric motor and disengage the pto lever. Has anyone seen something like this? Could this work? Would this be dangerous?

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RobertN

12-27-2000 09:37:38




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 Re: Allis B in reply to Duane, 12-25-2000 15:22:44  
I thought about this for my '41 Farmall A, but with a different twist.

I have a large impact wrench. What is a socket or exesion was nodifed so it looked just like the end of the regular crank. Slide that puppy in there, and crank it over with air power, just like a dragster or Indy car... Impact drivers can be found easily with 300-500 ft-lbs. that should be more than enough to turn a low compression tractor motor over.

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RobertN

12-27-2000 14:51:58




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 Re: Re: Allis B in reply to RobertN, 12-27-2000 09:37:38  
A poster on the Farmall page had a good point... My idea would not work well, bacause the impact wrench is not a motor; it works by hammering. If I used a impact wrench, it would have "negative impact" on the engine crank and such.

sounded good though...



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Butch(OH)

12-26-2000 05:25:40




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 Re: Allis B in reply to Duane, 12-25-2000 15:22:44  
I saw an Oliver (60 I think) at a show this summer that had a set up like that. The old fellow didn't want any permament modifications to his pet tractor so he rigged up a Chevy flexplate to the PTO shaft and welded up a bracket to hold the starter and bolted it to the hitch. The whole set-up including the battery can be removed in a few minutes. It is slick way to electrify an old hand cranker for show "work"

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wait a second

12-25-2000 18:41:39




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 Re: Allis B in reply to Duane, 12-25-2000 15:22:44  
The historic starter motor has 10 to 13 teeth on the gear while the engine has 100+. Say a 10:1 ratio.
The PTO turns around 540 will the B engine turns around 1800. 3.2:1 ratio You better get a electric motor with MO POWER!
I don't think this one is going to work.



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Bus Driver

12-26-2000 06:23:26




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 Re: Re: Allis B in reply to wait a second, 12-25-2000 18:41:39  
The 120 volt motor would have to be a gear motor to have enough torque to do the job. BIG$ for those and they are much heavier than ordinary motors. I saw a hand crank JD that had been rigged with a starter turning a rubber roller (washing machine wringer). This assembly was on a board hinged at one end with a spring at the other end to pull it away from the flywheel. The starter was first energized and the tractor operator pushed the turning assembly against the flywheel circumference.
The B Allis cranks extremely well if everything is in good shape. If it were mine, I would concentrate on restoring the condition of the engine internally, the magneto, and the carburetor. If that is stiil a problem for your needs and preferences, consider trading for one originally equipped with starter.

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Robert

12-26-2000 19:10:46




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 Re: Re: Re: Allis B in reply to Bus Driver, 12-26-2000 06:23:26  
Buy a GOOD drill, and make a straight shaft crank for your Allis. Chuck the "new" crank in the drill, and you have hand/electric start! I use to start the pony motor on my CAT this way. Better be a GOOD drill, or you will puke it!! Robert



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