In training for removing the armature as well as peachy the motor open, we're straight off going to take away the ii motor brushes. For those of you lot alongside no electrical motor experience, they’re non “brushes” inwards the conventional sense; they’re lilliputian sticks of carbon that hold off similar charcoal sticks. They reside inwards a metro leading into the motor as well as are covered yesteryear caps. There is i on the occur of the motor, i on the bottom. And equally you'll see, inspecting them tin render a proficient alert equally to whether you'll live able to preserve this machine or not.
Here nosotros run across i of the motor brush caps. This is i of the few parts on a vintage Singer that is non made of metal, but is instead made of Bakelite, a pre-cursor to plastic. That way these are slow to intermission yesteryear either using the incorrect size screwdriver fleck or yesteryear overtightening it.
A Brownells fleck #270-6 volition check it perfectly, as well as that is the exclusively i I recommend using--particularly if the cap is already stripped. (More information on screwdrivers here as well as here.)
After you lot take away the cap, the confine that is attached to the brush should popular out a little. Inspect it--this tin render our get-go alert that something may live incorrect within the motor. The confine should live clean. If it’s dirty, that’s non good.
Zooming in, nosotros run across this confine is non construct clean as well as has around bits of oily gunk on it. That’s bad. It way grease or fifty-fifty worse, crude has made its way into the motor, mayhap supplied yesteryear a previous possessor who didn’t know what they were doing.
On the other side of this machine, nosotros run across an example of a motor brush cap that person has partially stripped. I am nevertheless able to larn it off yesteryear using the right fleck as well as pressing it hard, but non likewise hard, into the slot equally I unscrew.
Once the cap is off, nosotros larn a nasty surprise:
Some unknowing soul (in my get-go draft, I used much rougher language) has seat GREASE into the motor tube. That’s very, real bad, as well as a sign that this motor may non live salvageable. If you lot discovery something similar this, chances are high that this motor has been completely ruined as well as that you lot volition non live able to preserve it. Later nosotros shall see.
Still, to quote "La Beef" from True Grit, "The Texas Ranger presses on."
Here I'm working on yet around other potted motor, this i alongside construct clean springs as well as I'll purpose it to illustrate the adjacent step. Once you’ve got the motor caps off as well as the springs acquaint themselves, run across if you lot tin GENTLY push clitoris them out. If the confine gives you lot whatsoever resistance as well as does non desire to come upwardly out, STOP; if you lot deform this spring, afterwards when you lot seat it back, it tin campaign the brush into the commutator alongside likewise much pressure, excavation a channel into it. If you lot don’t know what I hateful yesteryear this now, you’ll run across later. The bottom describe of piece of occupation is, don’t get got it out if it doesn’t desire to easily come upwardly out. (The grease-filled springs you lot run across above, yesteryear the way, did non desire to come upwardly out. We volition bargain alongside those in i trial the motor is open.)
If the confine does come upwardly out, great; as well as hopefully it brings the carbon brush alongside it. (If it doesn't, don't worry, we'll larn to it.)
The carbon brush volition in all probability live covered inwards its ain grit, which you lot tin wipe off on a napkin or newspaper towel equally a way to construct clean it. Don’t seat anything else on it or purpose whatsoever solvents, only wipe the dust off.
Store the brushes as well as caps someplace safe, nosotros won’t live needing them for a while.
If you lot get got a machine where around unknowing soul seat grease into the brush tube, don’t forget to construct clean that cap off as well as larn all of the grease off of it. You don’t desire that getting dorsum into the metro after we’ve cleaned it out.
Go on to Part 11: Armature & Worm Removal
