Got a 450 I put new brushes in the generator and a new regulator on. I polorized the regulator and It charged fine for a while. This is an old loader tractor so it doesn't see daily use. Now when I start it up I have to jump the gen pole and batt pole on the regulator to get it charging. It will charge fine untill I shut it off and then the next time I start it I have to jump the poles again. Do I have a bad regulator or is it something I'm forgeting to do. Thanks in advance.
- Thread starter Huskers86
- Start date
It is indeed the generator that requires
polarization, however, it matters not weather you
do it at the generator or at the regulator as long
as you supply current to the gen terminal from any
power source on the tractor. If you start it next
time and it does not charge, I would ground the
field terminal to tractor and this will eleminate
regulator from the circuit so if it charges that
way you know it is not generator. If it still does
not, you may have poor brush contact due to high
mica on commutator or just rough or not clean. Be
sure regulator has a good clean ground at it's
base also.
polarization, however, it matters not weather you
do it at the generator or at the regulator as long
as you supply current to the gen terminal from any
power source on the tractor. If you start it next
time and it does not charge, I would ground the
field terminal to tractor and this will eleminate
regulator from the circuit so if it charges that
way you know it is not generator. If it still does
not, you may have poor brush contact due to high
mica on commutator or just rough or not clean. Be
sure regulator has a good clean ground at it's
base also.
Janicholson
Well-known Member
I do not know what your post means. With respect,
the field is grounded when the tractor is shut
off.
The regulator points are closed making a direct
path to ground. Putting voltage to the field with
a jumper is not going to do anything but heat up
the points in the regulator, and associated wires.
The Gen is polarized by putting electricity
through the field poles from the Gen's ARM post
through the brushes (if 3 brush) or directly if 2
brush) then through the field windings (where the
magnetism sets a residual magnetism in the iron
cores of the field) and then out the F terminal to
the regulator where it is grounded, completing the
circuit.
With respect, Never connect bat to F. Jim
the field is grounded when the tractor is shut
off.
The regulator points are closed making a direct
path to ground. Putting voltage to the field with
a jumper is not going to do anything but heat up
the points in the regulator, and associated wires.
The Gen is polarized by putting electricity
through the field poles from the Gen's ARM post
through the brushes (if 3 brush) or directly if 2
brush) then through the field windings (where the
magnetism sets a residual magnetism in the iron
cores of the field) and then out the F terminal to
the regulator where it is grounded, completing the
circuit.
With respect, Never connect bat to F. Jim
I connected the jumper wire on one end to batt and struck it quickly across the field and it started charging and after it was shut off I restarted a couple times and it seems to be working fine. Reading your post it sounds as if I was lucky not to have fried the regulator by doing this. If I understand correctly going from gen to batt is o.k. but not to field.
Janicholson
Well-known Member
That is correct. You may have given it sufficient
current across the points in the field circuit that
corrosion or resistance was removed. I would
monitor voltage as the battery gets fully charged.
If it continues to charge at 10 amps or more, or the
volts exceed 7.2 when charged, the contacts could be
welded together. if welded, it would start working
again, but be uncontrolled. Jim
current across the points in the field circuit that
corrosion or resistance was removed. I would
monitor voltage as the battery gets fully charged.
If it continues to charge at 10 amps or more, or the
volts exceed 7.2 when charged, the contacts could be
welded together. if welded, it would start working
again, but be uncontrolled. Jim
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