s/g normal???

[animal]

I think I have a problem with a S/G not charging. I replaced my battery w/ a 340CCA that reads 12.8 VDC, so that should not cause the field to ground though the V/R and charge the battery? So I ground the field terminal of the S/G and see no increase in output. The S/G starts fine and was charging before the battery failed. By the way the bad battery was reading 12.4 VDC but would not supply the amps to turn over the K301 in my 126. I also forgot to touch the batt to gen terminals before starting it up, shut down and then remembered. Did I fry something?

[Matt G.]

If you are grounding the field and getting nothing, either the armature or field coils are shot.

[animal]

I suspected that the field is open, however there is no movement on the V/R contacts. Anyone know how to ohm out the field coil on the tractor and what it is supposed to read. This http://www.simpletractors.com/servic...-generator.htm said 8-12 ohms, but doesn't tell me where to measure and no wiring diagram. I added 2 50watt lights and two Grote tails recently and wonder if this had any thing to do with it. We have a big snow storm coming so battery charger it is then.

[Matt G.]

To test the field coils, measure the resistance across the two terminals on the S/G. If there is a low, finite resistance, they're fine. If zero or infinity, they're open or shorted, respectively. A bad armature winding can also cause this; that has to be checked with a growler, so you'll probably need an S/G repair shop for that.

If all of those lights are in addition to the OEM headlights, the charging system can't keep up.

[animal]

Thanks Matt. I've been playing with solid state for so long in the USAF that my analog is rusty. The lights are the only ones as my 126 did not come with lights. Just 2 50watt headlights, 2 Grote tails w/ flasher, and a 35wat rear work light.