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Anonymous
help me repair my sawzall 2017-08-19 05:33:26 Post No. 1230117
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help me repair my sawzall 2017-08-19 05:33:26 Post No. 1230117
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So I was using my sawzall on an handyman job and it quit on me (slowed down and smoked). I didn't think much of it as it was hot and I was cutting a lot of metal.
So I take it home and the thing starts for me with some fireworks. I also feel the thing spray me with debris. Opening the thing up I find about 1/2 cup of gravel in the housing. There's really no natural way that much fine gravel would have worked its way in. So I suspect foulplay from shitty ex coworkers.
After cleaning it, the thing won't turn for me. I bypassed the switch and speed control and fed it AC. I get a loud hum from the motor but no turn.
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>>1230117
Sounds like one of your ball bearings exploded. Can you turn the motor by hand? The gears? Does anything feel 'rumbly'?
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>>1230119
This was actual pea gravel that either sucked in during cutting or otherwise.
It reciprocates when I turn the armature and that turns with little difficulty.
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I have a solid hunch that I wired this incorrectly on the way back.
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My wiring was right, but I was attempting to bypass by contacting the brushes directly. I needed to contact AC to the bottom brush and 3B for example. Anyway the armature and brushes and all run fine.
The switch and power cable test good.
That paints a bullseye right on the speed control. I wonder if this is just a voltage divider. Probably not since it's the size of about three quaters. Maybe it's PWM. I'll likely have to cave and buy the $13 part rather than rigging something up.
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>>1230244
>speed control. I wonder if this is just a voltage divider
triac and diac with potentiometer/rheostat
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A coil is shorted. It's trash, buy a new one.
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>>1230559
I bypassed the speed control and had it running full bore. It got hot in a hurry and probably smoked a field coil for real.
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