July 2, 2016 at 9:28 pm #538088
Model 397.19590, build date of Sept. 20, 2965, by Delco, a division of General Motors.
I had to replace the capacitor as it was leaking and during disassembly both connector tabs snapped off. Before I tore it down it worked but I had to spin the wheels to get it going, otherwise the motor just hummed(a normal indicator of capacitor problems).
Today I got the basic grinder, sans guards and rest put together. When I first put the motor together, I fired it up to test my wiring and it seemed to work. I installed the new capacitor and replaced a baby blue wire leading from the power switch to the windings as it had gotten pinched and the insulation was badly damaged. Used a 14ga piece of the same color wire that appears to be the same size internally as what came out, I couldn’t find markings on the original wire to verify size. I soldered the wire to the windings and connected a spade plug to the switch end.
Once I got it assembled with wheels on, I tried starting it and it had the same problem as before. When first turned on, the wheels creep backwards a little. Once you spin then up to sufficient speed the motor starts to spin them up to speed.
After that I pulled the bottom cover of and verified all the wires were properly connected, which they were according to the wiring diagram on the bottom cover. I also noticed that the motor itself was pretty warm when I had the cover off. I’m wondering it I’ve got a bad connection on one end or the other of the baby blue wire or if I need to be looking elsewhere?
Shop Blog: http://ravenbarsrepair.tumblr.com/
Youtube Channel: https://www.youtube.com/channel/UCz498FKw9LF1awJsKIqhoxQJuly 3, 2016 at 1:12 am #538158
The grinder looking good. Looks like there’s a lot of work there.
A Working Pro since 1988!
Member since January 26, 2013.July 3, 2016 at 8:06 am #538243
Nice job on the restoration. I wonder if you got the wrong capacitor?
A Working Pro since 1994!
Member since March 26, 2014.July 3, 2016 at 8:37 am #538262
SprokitzProEastern shore of, Pa
It does sound like the capacitor. Nice job on the restoJuly 3, 2016 at 8:43 am #538266
jponto07ModeratorBloomington, INJuly 3, 2016 at 8:48 am #538270
crotaluscoProwest bend, wi
I know nothing about how tools work so i will be of no help. But i will follow this as I have an OLD home built drill press I would like to get running again. Looking great so farJuly 3, 2016 at 11:23 am #538333
Nice old grinder Dustin. Came out looking really good.
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