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Elec. system for T20

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kooz

09-26-2001 13:49:26




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just brought home my new toy and battery went low tring to start it. the guy I bought it from jump start it with my truck. no problem. then we started it 2-3 times on own.I try staring it a little later and very slow to turn over. I decide to do the same as before.When I looked to see the battery post,the pos post was hooked to grnd and neg postwas hooked to pos wire. so i switched and jump started again as before.but as thetractor was running the gen started to smoke. ???? help!!

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Jeff Fry

10-14-2001 11:15:11




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 Re: elec. system for T20 in reply to kooz, 09-26-2001 13:49:26  
Just for info: I dealt with my to20's 6 volt system, and no matter how good condition everything was in, it never really would crank over the way I wanted, especially in the cold winter. I didn't want to obviously change the tractor to 12volt for cosmetic reasons. I found you can get an 8volt battery, got mine at Farm Fleet, which is the same dimensions as the 6volt. I kept the positive ground system. I was able to tweak up the voltage regulator settings to work with the 8 volt bat. The original generator works fine like this. I didnt change the coil or ignition at all, or the headlamp bulbs, and theyve been fine for several seasons. The tractor cranks over amazingly better with this setup. Anyone interested can email me for specific settings on the regulator. Jeff

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kooz

10-15-2001 09:33:37




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 Re: Re: elec. system for T20 in reply to Jeff Fry, 10-14-2001 11:15:11  
JEFF, THANKS FOR THE INFO. THE 8 VOLT BATTERY,IT CERTAINLY SOUNDS LIKE AN OPTION. I WOULD APPRECIATE THE SPECS FOR THE REGULATOR. I'M IN THE PROCESS RIGHT NOW OF GETTING MY GENERATOR BACK EITHER REBUILT OR REPLACED.IF I HAVE TO REPLACED,I WAS CONSIDERING THE DIFFERENT OPTIONS WITH THE 12 VOLT REPLACEMENT KITS. THANKS AGAIN, KOOZ



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Greg

10-02-2001 10:06:41




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 Re: elec. system for T20 in reply to kooz, 09-26-2001 13:49:26  
You did remember to polorize the generator (or 'flash the fields' as it is sometimes called), didn't you? This causes the generator and voltage regulator to be correctly polorized (ie, +/+ and -/-) The manuals tell you to do this after every time the generator, voltage regulator or battery is reconnected. In practice I have found the only time it is usually needed is after the volt. reg. is changed or the gen, is repaired.

I may catch some flack for this, but I changed my TO-20 to 12 volts just because of a bad generator and not having a 6 volt battery charger. I replaced the gen with a Chevy alternator using homemade brackets, reversed the coil connections (for negitave ground) installed a ballast resistor in the coil wire, and wired the 12 volt battery with neg ground. The starter works just fine as is, but really wheels the motor over on 12 volts. Just a touch and it is started!

Greg PS I found the 'start' position on the shift would not work-turned out to be a misadjusted "relay" switch- the one that the battery cable hooks on.

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Greg

10-02-2001 10:06:46




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 Re: elec. system for T20 in reply to kooz, 09-26-2001 13:49:26  
You did remember to polorize the generator (or 'flash the fields' as it is sometimes called), didn't you? This causes the generator and voltage regulator to be correctly polorized (ie, +/+ and -/-) The manuals tell you to do this after every time the generator, voltage regulator or battery is reconnected. In practice I have found the only time it is usually needed is after the volt. reg. is changed or the gen, is repaired.

I may catch some flack for this, but I changed my TO-20 to 12 volts just because of a bad generator and not having a 6 volt battery charger. I replaced the gen with a Chevy alternator using homemade brackets, reversed the coil connections (for negitave ground) installed a ballast resistor in the coil wire, and wired the 12 volt battery with neg ground. The starter works just fine as is, but really wheels the motor over on 12 volts. Just a touch and it is started!

Greg PS I found the 'start' position on the shift would not work-turned out to be a misadjusted "relay" switch- the one that the battery cable hooks on.

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kooz

10-03-2001 13:46:38




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 Re: Re: elec. system for T20 in reply to Greg, 10-02-2001 10:06:46  
Greg, thanks for the heads up on polarizing. I got the word and the how to this morning. I'm having my generator rebuilt and should be ready next week sometime.hopefully all will go well and I'll be playing with my new toy!!!

kooz



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Ray,IN

09-27-2001 22:30:13




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 Re: elec. system for T20 in reply to kooz, 09-26-2001 13:49:26  
Kooz, try this link for a wiring diagram for your tractor. You may jumpstart your 6V pos ground tractor by clipping the jumper cables directly to the starter post and the gnd to a starter mounting bolt,this bypasses the entire wiring system all you must do is MAKE SURE the [gearshift is in neutral]!!! and have the key on. If you have a new battery inspect the cables for corroded, dirty connections. Are the cables the small 6ga wire for a 12V system? If so, replace them with "0" ga wire to carry the needed current for a 6V system. I hope this helps with your starting problem. Good Luck!

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kooz

10-01-2001 08:40:54




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 Re: Re: elec. system for T20 in reply to Ray,IN, 09-27-2001 22:30:13  
Ray, thanks for extra tidbit on wire ga size. I have the generator being rebuilt, looks like bearings and brushes,and will have it back shortly. The battery is new and had that recharged. So, if the battery starts to go down again, i'll look into cables to make sure they are the righ ga. thanks again.



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doug-8n20220

09-27-2001 05:12:55




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 Re: elec. system for T20 in reply to kooz, 09-26-2001 13:49:26  
When you reversed the polarity, some of your electrical components may have be fried. Probably the best way to start fixing is by determining if you have a 6 or 12 volt system. Count the number of water fill holes on your battery and multiply by 2. (3 holes = 6 volts)

Start out with a new, fully charged battery that is installed properly with the positive side grounded and try starting the tractor. If the starter will not spin, try jumping just the starter wires to by pass your ignition switch, starter switch and regulator. If the starter now spins, you have determined that some or all of these parts need replacing. If the starter still will not crank, then your starter is gone.

Once the engine is running and after you have used it a few times, you'll determine if your generator is working. If the battery is growing weak, then the generator is probably dead, too. Good luck and refer back to the forum or your I & T shop manual for more ideas and instructions.

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Jone

09-27-2001 04:22:45




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 Re: elec. system for T20 in reply to kooz, 09-26-2001 13:49:26  
The Ferguson tractors had positive ground, and you shold NOT MESS with that, mine had negative ground, and i know this can be done, but i cant explain how this can be done, mabey someone else can? and you shold not try to jump start it because most of the early fergusons have a 6 volt system, and your truck probarbly has a 12 or 24 volt system. This also explains the smoke from the generator and probarbly the starter too. Or the generator had something wrong with the bearings and got Hot. you shold rebuild that. and since the starter turned slowly, the generator probarbly didnt charge the battery.

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kooz

09-27-2001 09:43:41




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 Re: Re: elec. system for T20 in reply to Jone, 09-27-2001 04:22:45  
doug - 8n20220 and jone, thanks tractor mates!!!I,ve seen the light. positive grnd. after getting on the forum, I went back to the ole girl and put things back the way they were and try starting her up. She started right up with a jump start.It looked like smoke was starting to come from the generator again ,so i shut it down. The batery is brand new. So I have to concur that the generator was bad from gitgo.Also, from your words of wisdom, no more jump starting from vehicles!! Thanks again. Will let you know how things turn out

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doug-8n20220

09-27-2001 10:17:57




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 Re: Re: Re: elec. system for T20 in reply to kooz, 09-27-2001 09:43:41  
You can probably get by with the occassional jump start if you hit the start in short bursts or connect directly to the starter. It's not the starter, but the points, coil, condensor & resistor that cannot withstand the 12 volt surge. Also, the battery supplies the power to the coil to create spark.

Generators can be rebuilt at a lower cost than replacing it with a new one. Rebuild kits are available or electric motor repair facilities can also provide information if your generator can be rebuilt and will perform the rebuild for you.

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