[Farmall] Farmall C wiring diagram

Mon Jun 15 05:38:22 PDT 2009

Hi Steve,

I'm sorry to have been slow to thank you for helping me here.  We had just
enough good weather over the last few days in Vermont to cut some hay - so
I've been away from my computer and my Farmall H.  But I did put a trickle
charge on it as you suggested.

To answer your questions, 

first: "cleaning" means scraping and brushing the contacts, resetting the
brushes in clean glides, wiping the interior housing and praying that it
helps. 
Second:  I am sure that the new regulator is connected correctly, but I was
concerned that the spark I got when I inadvertently touched the F terminal
while trying to polarize the unit might have done damage.  As I said, the
other end of the jumper wire was not touching anything at that moment.
Third:  The housing and harness seem to be in good condition.

Rebuild the generator?

Many thanks, Bruce

-----Original Message-----
From: farmall-bounces at lists.antique-tractor.com
[mailto:farmall-bounces at lists.antique-tractor.com] On Behalf Of Stephen
Offiler
Sent: Wednesday, June 10, 2009 8:41 AM
To: Farmall/IHC mailing list
Subject: Re: [Farmall] Farmall C wiring diagram

Bruce:

Well, let's see...  Definitely sounds like your ammeter is hooked up
correctly.  So that small discharge you see while engine is running is
the current consumed by the ignition system, and you are running a
"total loss" system - not putting current back in the battery.  This
is easily "fixed" by hooking up some sort of trickle-charger when the
tractor is parked, which I suggest you consider doing until you get
around to chasing down the real problem and correcting it.  Lead-acid
batteries do NOT like to sit around in a state of semi-discharge.  The
plates get coated with sulfate and you permanently lose capacity.

Questions for you:

- define what you mean by "cleaning" the generator vs. "rebuilding"
from your earlier correspondence
- are you comfortable that the newly replaced regulator is connected
correctly?
- does the tractor's wiring harness appear to be in generally decent
condition?

Hint:  The most likely culprit within the generator is the commutator
and brushes.

Best regards,
Steve O.

On Tue, Jun 9, 2009 at 6:43 PM, Bruce Hallett<bruce3 at sover.net> wrote:
> SO,
>
> Thanks so much for your prompt (and helpful) response.  Since I get a
strong
> discharge reading when the lights are on and the engine is not running,
I'm
> inclined to think that the ammeter is OK.  The battery is still starting
the
> tractor at this point, so I can't say for sure that the electrical system
is
> draining.
>
> If it is, would your next step be to rebuild the generator?
>
> Thanks again,
>
> Bruce Hallett
> -----Original Message-----
> From: farmall-bounces at lists.antique-tractor.com
> [mailto:farmall-bounces at lists.antique-tractor.com] On Behalf Of Stephen
> Offiler
> Sent: Tuesday, June 09, 2009 1:27 PM
> To: Farmall/IHC mailing list
> Subject: Re: [Farmall] Farmall C wiring diagram
>
> Are you sure the ammeter is connected correctly?  Meaning, if it is
> backward, then the trickle discharge you are seeing is in reality a
> trickle of charge which is completely normal.  Does your battery
> slowly but surely die, which would support the idea that it IS
> discharging?
>
> SO
>
>
> On Tue, Jun 9, 2009 at 1:13 PM, Bruce Hallett<bruce3 at sover.net> wrote:
>> As long as we are on the subject of wiring, could anyone help me with the
>> following?  The ammeter on my 6 volt, positive grounded Farmall H was
>> registering a trickle discharge when the engine is running.  In an effort
> to
>> fix the problem, I cleaned (did not rebuild) the generator and replaced
> the
>> regulator.  In the process of trying to polarize the system, I touched
the
>> field terminal ever so briefly with one end of the jump wire, which
caused
>> it to spark even though the other end of the wire was not touching
> anything.
>> Subsequently, the B and G terminals were connected for a second or so,
got
> a
>> spark and thought I had probably succeeded in polarizing the system.
>>
>> Alas, the ammeter still shows the same trickle discharge and I'm at a
loss
>> to know what to do next.  Your suggestions would be most welcome.
>>
>> Thanks,
>>
>> Bruce Hallett
>> South Londonderry, Vermont
>>
>>
>> -----Original Message-----
>> From: farmall-bounces at lists.antique-tractor.com
>> [mailto:farmall-bounces at lists.antique-tractor.com] On Behalf Of
>> Supermoy6 at aol.com
>> Sent: Tuesday, June 09, 2009 10:15 AM
>> To: farmall at lists.antique-tractor.com
>> Subject: Re: [Farmall] Farmall C wiring diagram
>>
>>
>> Mike, Dean & Marvin,
>>
>> On behalf of my neighbor/friend, thank you very much.  This should  help
>> him out a lot.  Once again this group comes through with a wealth of
>> information.
>>
>> Thanks again,
>> Randy Baker
>> Winters, CA
>>
>> **************Download the AOL Classifieds Toolbar for local deals at
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