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anyone added an alternator?

2776 Views 11 Replies 8 Participants Last post by  NSBolens
I have a Bolens tubeframe that has been re-powered with a 13hp honda clone. I intend to use a small atv winch to lift and lower a snowplow, and I'm concerned about the charging system being able to keep up demand, I have 2 amber marker lights on the front, 2 Red on the back, and they are wired to a flasher. I also have 2 55w halogen driving lights on the front. the charging circuit on my motor puts out 3 amps, which is pretty much absorbed by all of my lights.

I'm considering adding a vehicle alternator to run off an accessory belt, a spare groove on the engine pulley. I have in mind a 75 amp ford alternator from a little ranger.

Has anyone done this? Does anyone have any ideas or constructive criticism?
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You want an alternator with an internal regulator. I used a delco (gm) on my 10 hp that I put in an old Alis Chalmers.
The big post on the alt shell goes to the battery and one of the plug- in style connector wires go to ign (not sure which one- one goes to ign and one to an idiot light, we don't need the idiot light one.)
For our application, direction of rotation doesn't matter (the cooling blades are the only directional things on the unit and we are out in the open air anyway- not under a hot hood).
On the GMs the old "V" belt pulleys have the same inner bore as the serpentine pulleys, so you can swap pulleys (use an impact gun on the nut) to use a newer style alternator and still use a v-belt, the plug in is a different style but have the same function.
I had a 105 amp rebuilt alternator leftover from a project and swapped pulleys and put it on the Alis. Works fine. It does need to be spun with a pulley more than just a couple inches in diameter to get it to put out current. I used a 4" (I think).
I use a couple of aux lights in front and one in back- when you turn them on, the motor idles down a little bit. All the power you use will come from the alternator - not the battery (unless the engine is off or idling). This is why guys burn up their alternators with big off road winching sometimes.
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