Posted: 11/9/2010 12:27:20 AM EDT
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There's been a lot of discussion here about generators and repairing them, to include flashing the field, etc.
I found this online manual for a Wacker light tower that uses a Cat diesel 3 cyl engine to develop about 12 HP and 6000 watts to run 4 high pressure sodium or metal halide lights about 1000 watts each. The manual in the second half discusses maintainence specific to this light tower/engine/generator head and goes into a lot of detail re the generator section. Flashing the field is discussed in detail and they mention polarity of the 12 volt batttery to the field doesn't matter, something I've wondered about but now realize why. The generator is a diode/capacitor excited design and a quick study of the manual should give anyone a good headstart on servicing their own. http://products.wackerneuson.com/manuals/Repair/0160487en_003Rep.pdf |
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Quoted:
I got a free generator because the field coil burnt open, i wonder if that happened when they flashed the field for too long. Em, was there a complete burning and charring of the winding? Did the field depend on a perm magnet? Maybe a diode or cap shorted, did you check? Maybe a wire just broke? Or the winding shorted internally... |
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the wire was burnt clean between the point where it left the coil and went to the slip ring, i just unwound a few inches ,added a few and re-soldered it to the ring.
it looked like a very high current failure, it burnt in free air before the tightly wound part had time to char. Like what would happen if hooked to a 12v battery for a few seconds. |
