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Ford 9N, 2N & 8N Discussion Forum
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Generator froze up

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RobertD

05-08-2006 14:59:57




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On my '42 9N, the generator is locked solid. It is still a 6V system, stock as far as I can tell. Took a look at new generators and they are big bucks. I use this tractor for working so being original is not important. Seems like now is the time to go ahead and convert to a 12V alternator. Thoughts anyone?

Robert




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Bob Harvey

05-09-2006 08:18:46




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 Re: Generator froze up in reply to RobertD, 05-08-2006 14:59:57  
12v conversion kits abound on eBay. New alt.,12v coil,resistor,belt, brackets, wire and new ammeter $100.00-$125.00



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Bob

05-08-2006 22:53:14




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 Re: Generator froze up in reply to RobertD, 05-08-2006 14:59:57  
Likely, the front bearing has seized. Get a new one for $3 to $8, and put it in yourself. Remember to polarize the generator after repairs, before starting the engine.



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dan hill

05-09-2006 02:05:39




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 Re: Generator froze up in reply to Bob, 05-08-2006 22:53:14  
Its best not to bring up the polarize bit.Unless the generator was hit with a hammer there is residual magnetism left in the pole pieces.The cut out or regulator disconnects the generator when the engine shuts down.How would taking the generator off the tractor or disconnecting the battery have any bad effect?I have taken the battery cable off my john deere H every winter for 40 years now.It has never failed to charge when Spring work starts in April.

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Bob

05-09-2006 06:59:45




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 Re: Generator froze up in reply to dan hill, 05-09-2006 02:05:39  
'Most every service manual from the generator era stresses polarizing after disassembly and re-assembly. They MUST have had some reason for including that step in the instructions?



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dan hill

05-10-2006 03:41:03




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 Re: Generator froze up in reply to Bob, 05-09-2006 06:59:45  
A brand new generator that has never generated current may not work.No residual magnetism.You are still trying to teach the dog to bark when you polarize a generator.Polarizing a regulator gets funnier as the regulator is a magnetic device that attracts a steel arm with points on it.The electromagnet works regardless of polarity, it will work on ac current also.I suspect many resistors in regulators have been cooked when Dufus jumps the wrong wire.Ive worked with generators and regulators over 50 years.Never polarized any.Again tell me WHY you do it.

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david b guest

05-08-2006 20:29:05




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 Re: Generator froze up in reply to RobertD, 05-08-2006 14:59:57  
For 80 bucks I should open a shop. Used to be $20 plus on and off the car when I was doing them. Ruined a good kitchen table that way. Find one that spins okay, clean commutator, replace brushes if too. short. Shouldn't take an hour. Find an old-timer to help probably be glad for the memories. Did lot of Fords on road or parkin' lot.



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dan hill

05-08-2006 16:57:30




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 Re: Generator froze up in reply to RobertD, 05-08-2006 14:59:57  
Buy a front bearing and brush set and fix it your self.Friend got a price of 100.00 on a starter from a shop,I put new brushes in it and turned the commutator for 10.00.When my tractor steering quit I borrowed his tractor to finish getting my hay in.His tractor had a generator bearing go out.I baled his hay with my tractor and put a new bearing and brushes in his generator.No charge,find a shop that wont skin you.

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old

05-08-2006 15:52:59




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 Re: Generator froze up in reply to RobertD, 05-08-2006 14:59:57  
No matter which way you go your looking about about $100 give or take a little. A good starter shop can rebuild the genny or you can go with a 12 volt system but you will still spend about the same $$. Or if yous is to far gone I have probably 5 plus of them sitting in my shop, but they all need to be rebuilt

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RobertD

05-08-2006 16:01:10




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 Re: Generator froze up in reply to old, 05-08-2006 15:52:59  
I called a local alternator repair shop and he said I should expect between $100 and $200 depending on whether the armature needed to be replaced. For about $175, I could do the whole conversion and have a quicker starting machine. I do OK with 6V but it does give problems from time to time depending on how long it has been sitting.



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duey

05-08-2006 21:32:14




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 Re: Generator froze up in reply to RobertD, 05-08-2006 16:01:10  
If you can fabricate a SIMPLE mounting bracket, you CAN do the conversion for about $40 or less... Not $100. That is assuming a rebuilt alternator... your cost is even less if you get a junkyard unit. A working alternator, a Chrysler resistor (cheap), a diode or two and a minor amount of electrical savy, you are DONE. Simple and very basic, is all it is... if you don't understand basic electricity, get a friend to help who DOES!! You want approximately 3 volts at the coil when the points are CLOSED. Diagrams abound.

duey

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old

05-08-2006 17:16:43




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 Re: Generator froze up in reply to RobertD, 05-08-2006 16:01:10  
Yep I understand since I have so many tractors and most are 12 volt systems. But I can also wire up one almost in my sleep. I have been doing it for 20 plus years and since 6 volt battery can be hard to find and also in my area cost more then a 12 volt one I go that way most of the time



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dan hill

05-09-2006 02:54:18




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 Re: Generator froze up in reply to old, 05-08-2006 17:16:43  
I was looking at batteries.My sawmill battery is 3 years old,since these small batteries seldom last a year .There were 6 volt batteries on the rack, 30.00 each.A parts kit can be bought for a starter or gen for about 10.00.If the armature is Ok 100.00 is way too much for rebuild.My Chev pickup starter had been fixed many times.When the drive acted up I bought a rebuild for 30.00.Why pay a pirate 100.00.My 96 ford starter Refused to crank now and then.Stopped at 3 auto suppilers asking about new brush set.They could only offer rebuilt at 100.00 and up, no brushes.A 4th said new brush rigging was 40.00 but would have to be ordered.Went home , made a phone call.Had a new brush rigging in 4 days for 16.50 postage included.The brushes and holders are all one unit.They could be replaced without taking the starter out after you did a few.These late starters are perm. magnet type, much smaller than older units.Parts are reasonable and the starters are easy to work on.

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Gaspump

05-08-2006 15:12:04




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 Re: Generator froze up in reply to RobertD, 05-08-2006 14:59:57  
I pick up those bearings and/or bushings for $2 a bearing and about $1 a bushing at my local auto electric shop. Brushes about $.50 ea, Armatures are about $35 and a total rebuild by them less than $100. They will test & dress an armature and install bearings for under $20. Why pay more?



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souNdguy

05-08-2006 16:32:00




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 Re: Generator froze up in reply to Gaspump, 05-08-2006 15:12:04  
Yep.. same here.. my local mom-n-pop shop will rebuild most gennies and starters for tractors for about 80$ give or take.

The guy that wants 200$ must have kids in college... since you can by a repro genny for about 150$

Soundguy



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