I'm trying to remove the rotor (field coil) on my little UST GG2300 single
phase generator. It won't come off. The long screw that holds it on was
over-tight and it took some care to remove it without breaking it. Anyone
have any suggestions on how to remove a stuck rotor? I've tried tapping,
pulling and even some whacking but I'm afraid if I hit it any harder I'm
gonna bend the crankshaft. I tried using a puller on the bearing at the end
of the rotor, pushing against the screw (reinserted) but I'm afraid the
bearing might come off before the rotor lets go. I've removed several
rotors on tapered shafts before. Some were stuck buy they always came off
Kroil? That one is new to me. I managed to get some WD40 in there, have
tension on it with a 3-jaw puller pulling against the screw, left it like
that all night tilted toward the trouble area, tried whacking it with the
tension from the puller...
I really can't pry behind this particular rotor due to the way the case is
designed. I did try though.
I'm afraid my freezer isn't quite big enough for a generator, even if it is
a rather small one ;-) Maybe I'll just wait til winter.
I thought about using a torch but I think I'll have to make a hole in the
case in order to get the flame in there. I also wanted to see how the
impeller (cooling fan) was attached so I didn't want to destroy it if I
could help it. Might have to though.
Yea. Sometimes called an armature but I think that generally refers to the
spinning part of a motor.
I went over to SmokStak.com and here's what I found: One slick trick is to
tap the end of the rotor so it accepts a screw (3/8" would be about right on
mine). Insert a steel rod just slightly smaller than the hole in the middle
of the rotor. Insert the screw and tighten until the rotor pops off! Turns
out my rotor is already threaded on the end, apparently just for this
purpose! It looked like it was 3/8 24 but my tap won't go in easily so it
must be metric. Now it's a matter of finding a screw that fits.
Another trick is to attach a zerc fitting to the end of the rotor and
basically turn it into a hydraulic cylinder. From what I read it may take
some time but eventually the pressure from a grease gun will force the rotor
off the shaft. This trick is extra slick ;-)
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