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#1
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Stuck Rotor on Tapered Shaft
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 eventually. |
#2
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Stuck Rotor on Tapered Shaft
On Jun 26, 11:35*am, "Ulysses" wrote:
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. If it's jammed, force it. If it breaks, it needed to be replaced anyway. ----- - gpsman |
#3
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Stuck Rotor on Tapered Shaft
On Jun 26, 11:35�am, "Ulysses" wrote:
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 eventually. Put the puller back on and put pressure on it with the puller. At the same time whack the rotor and/or the puller bolt. Hank |
#4
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Stuck Rotor on Tapered Shaft
Ulysses wrote: 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 eventually. Any way to get a "pickle fork" type of wedge between a step on the shaft and the rotor? How about applying some of the magic Kroil and letting it work its way in for a day or two? |
#5
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Stuck Rotor on Tapered Shaft
Ulysses wrote:
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 eventually. On another project here - after letting the sucker soak in solvent - you might try heating the part that needs removing (like with a propane torch). The theory is that the metal will expand... |
#6
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Stuck Rotor on Tapered Shaft
HeyBub wrote:
On another project here - after letting the sucker soak in solvent - you might try heating the part that needs removing (like with a propane torch). The theory is that the metal will expand... Yep, put the whole thing in the freezer overnight, then heat up the (sacrificial) bearing quickly with a torch and whack the shaft. Jon |
#7
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Stuck Rotor on Tapered Shaft
Would you describe this thing you are calling a "rotor" or
post a link to a picture of one? I might know what you mean, but your use of words is different than mine. -- Christopher A. Young Learn more about Jesus www.lds.org .. "Ulysses" wrote in message ... 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 eventually. |
#8
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Stuck Rotor on Tapered Shaft
"Pete C." wrote in message ster.com... Ulysses wrote: 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 eventually. Any way to get a "pickle fork" type of wedge between a step on the shaft and the rotor? How about applying some of the magic Kroil and letting it work its way in for a day or two? 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. |
#9
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Stuck Rotor on Tapered Shaft
"Jon Danniken" wrote in message ... HeyBub wrote: On another project here - after letting the sucker soak in solvent - you might try heating the part that needs removing (like with a propane torch). The theory is that the metal will expand... Yep, put the whole thing in the freezer overnight, then heat up the (sacrificial) bearing quickly with a torch and whack the shaft. Jon 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. |
#10
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Stuck Rotor on Tapered Shaft
Ulysses wrote: "Pete C." wrote in message ster.com... Ulysses wrote: 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 eventually. Any way to get a "pickle fork" type of wedge between a step on the shaft and the rotor? How about applying some of the magic Kroil and letting it work its way in for a day or two? 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. Kroil - get it from Kano Labs, the manufacturer. You can order it online, and I recommend getting a gallon. It's really really good stuff. |
#11
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Stuck Rotor on Tapered Shaft
Stormin Mormon wrote: Would you describe this thing you are calling a "rotor" or post a link to a picture of one? I might know what you mean, but your use of words is different than mine. Rotor - The spinning guts in the middle of a generator, that spins inside the stator. |
#12
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Stuck Rotor on Tapered Shaft
"Pete C." wrote in message ster.com... Stormin Mormon wrote: Would you describe this thing you are calling a "rotor" or post a link to a picture of one? I might know what you mean, but your use of words is different than mine. Rotor - The spinning guts in the middle of a generator, that spins inside the stator. 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 ;-) |
#13
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Stuck Rotor on Tapered Shaft
On Fri, 26 Jun 2009 08:35:47 -0700, Ulysses wrote:
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 eventually. http://s370.photobucket.com/albums/o...1246116424.jpg |
#14
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Stuck Rotor on Tapered Shaft
On Fri, 26 Jun 2009 08:35:47 -0700, against all advice, something
compelled "Ulysses" , to say: I'm trying to remove the rotor (field coil) on my little UST GG2300 single phase generator. It won't come off. Have you tried using WD-40? -- Don't worry about people stealing an idea. If it's original, you will have to ram it down their throats. - Howard Aiken |
#15
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Stuck Rotor on Tapered Shaft
HeyBub wrote:
Ulysses wrote: 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 eventually. On another project here - after letting the sucker soak in solvent - you might try heating the part that needs removing (like with a propane torch). The theory is that the metal will expand... Keep in mind that most solvents (incl. wd-40) are flamable (for a time)). I have hung 'em from a tree overnight: cold night, warm sun in morning, gravity helps ... |
#16
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Stuck Rotor on Tapered Shaft
Ulysses wrote: "Pete C." wrote in message ster.com... Stormin Mormon wrote: Would you describe this thing you are calling a "rotor" or post a link to a picture of one? I might know what you mean, but your use of words is different than mine. Rotor - The spinning guts in the middle of a generator, that spins inside the stator. 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 ;-) I've read the grease trick for blind pocketed bushings where you fill the pocket with grease and then tap in a rod that matches the bushing bore, forcing the bushing forward. |
#17
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Stuck Rotor on Tapered Shaft
I think that's called "armature", but I could as easily be
mistaken. Hey, I've never removed one of those, so I'm not going to be any help. -- Christopher A. Young Learn more about Jesus www.lds.org .. "Pete C." wrote in message ster.com... Stormin Mormon wrote: Would you describe this thing you are calling a "rotor" or post a link to a picture of one? I might know what you mean, but your use of words is different than mine. Rotor - The spinning guts in the middle of a generator, that spins inside the stator. |
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