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2n electrical problems

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Jsmits

04-03-2000 14:33:34




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I have a 1944 2N. less than 15 running hours on complete engine overhaul which I did last winter. (did nothing to electrical system at this time) Starter was not turning engine over so I put in a new 6v. battery. Old battery was 6v. Engine still turned over hard and slow. Would have to jump start with 12 volt battery. Old battery was connected with NEGATIVE ground. Got tired of this so I took the starter out and the shaft was spinning about 3/8" out of round so I bought a new starter. Still would not turn over very fast or for very long. Decided to check out the electrical system. Now I find out that it should have been a POSITIVE gound on the battery. So I pulled off the wiring harnes and checked and re-taped the wiring harnes and cleaned off all of the connections. Bought new coil, cutout relay, condensor, points, and plugs. Connected battery up with POSITIVE ground as found at Nseries.com. Turned on the switch and the resistor on the terminal block gets warm to hot. IS THIS NORMAL??? IF NOT WHAT COULD BE THE PROBLEM??? NEW BATTERY WAS ALSO INSTALLED. And when I go to start the tractor the starter still turns over slow. WHAT ELSE BESIDES TIGHT ENGINE COULD CAUSE SLOW CRANKING??

Pulled the tractor to start it. It started right away. Checked the Generator (one post generator) and the voltage was about 30 volts. IS THIS POSSIBLE?? COULD HAVE THE PERSON BEFORE ME PUT ON A 12 VOLT GENERATOR?? There were no other voltage regulators. Everything seemed to be stand

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Hank

04-03-2000 15:51:45




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 Re: 2n electrical problems in reply to Jsmits, 04-03-2000 14:33:34  
Keep in mind that the wiring on these tractors is very simple. If you go chasing ghosts in the system you'll go nuts. Get a wiring diagram and check to see that yours matches. I found some creative wiring on mine and yet it still ran. What often happens is it isn't one bad spot but many smaller places, when you add them up you get hard starts and dead batteries. You can redo the entire wiring with one harness. I redid the entire electrical system, minus the generator for under $125. Started like a champ.

Check the cut out voltage on both sides. Or replace it, they are cheap! You may also be able to adjust the voltage output from the generator.

Terminal blocks will get hot, in fact they have started many fires.

I would check the polarity on that generator.

Good luck!

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Walnut Hill

04-03-2000 15:43:39




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 Re: 2n electrical problems in reply to Jsmits, 04-03-2000 14:33:34  
Did I understand that you just overhaul it ....Well here is a problem you might be having did you put oil in the sparkplugs holes to lube the pistons if you did you have extra compression in the cyl. and this is causing you to have a tight eng. and you will have to loosen it up spinning it faster and you might use 12volt batt. to loosen it up and also you might check you timing on your eng. if it still does'nt start ... now it is very important to have good heavy duty batt. cables... good luck...

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Claus

04-03-2000 15:23:10




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 Re: 2n electrical problems in reply to Jsmits, 04-03-2000 14:33:34  
first the resistor: The job of the resistor is to take electrical energy and convert it into heat. This limits the current going to the points and coil. Consequently it will get hot...in the vicinity of 6 watts. If you read 30 volts on the armature terminal, then most likely the cutout relay may not be closing or you have really dirty brushes and they are causing a lot of hash.. read the voltage on both sides of the cutout relay. Your battery may not be charging and henceforth the slow engine turnover with a weak battery. You really need to take voltage readings on the starter, negative terminal on the battery, and starter switch to see if you are dropping an excessive amount of voltage. This would also limit the current to the starter and hence slow spinning. It really does not matter if the ground is positive or negative as long as the generator is polarized properly. You may see some degradation in the spark intensity if the coil polarity is reversed. This would manifest itself under load, i.e. going up hill etc.. Side mount distributors are easily reversed but not front mounts, so it is better to keep the positive ground on the front mount tractor.
Hope this helps
Happy motoring
Claus

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ZANE

04-03-2000 15:18:24




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 Re: 2n electrical problems in reply to Jsmits, 04-03-2000 14:33:34  
The resistor is supposed to get hot.Especially if the switch is left on for a couple of minutes without the engine running.
You need to be sure that the larger capacity battery cables that are for the 6 volt system are installed and not the smaller ones that are for the 12 volt system. There is a lot of difference in the current that originals will carry compared to the 12 volt cables. Get some cables made from welding leads and you will be able to carry the current to the starter as it should.

If you jump start with 12 volts you should go straight to the starter post and do not connect to the 6 volt batter at all. This way you will not be taking the chance of damaging the 6 volt system. Just be sure that the tractor is out of gear and the clutch disengaged so you don't run over yourself or the back of the garage.

You should check the charging voltage with the battery connected to the generator. you must have have the wire disconnected to have such high voltage readings. Be sure the cut out is connected to the wireing at the output terminal. Check the voltage at the battery and not at the generator with the cutout disconnected.

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FarmAlaska

06-06-2000 18:48:56




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 Re: Re: 2n electrical problems in reply to ZANE, 04-03-2000 15:18:24  
Six volt starters must have full field windings to start properly, so-called rebuilders cutout some to save money, end up with a slowww cranking motor. That is the first place to look! To test the system: Fully charge a known good batt. Hook up voltmeter. Engage stater ignition off, note reading should be about 4.3 or higher. If lower than that, starter is dragging or has field problems. As far as tight engine is concerned- can you turn it over by hand using fan blades, if not you may need 12 volts to crank until broke in.

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