Black and Decker Mower Repair – Replacing the Motor Brushes (Black and Decker Part # 242273-00)

Black and Decker Mower Repair – Replacing the Motor Brushes (Black and Decker Part # 242273-00)


“The shunted brush is a carbon motor brush
with a shunt wire attached. There are two shunted brushes attached to
your lawnmowers motor. The brushes conduct electricity to the motor’s
armature through the commutator. Because the soft carbon brushes are in constant
contact with the rotating commutator, they will wear down and periodically will need
to be replaced. When a brush wears out, it will lose contact
with the commutator or make an intermittent contact. This will prevent the motor from turning on
or to turn on only sporadically. A water brush will often cause excessive sparks
with contacts to the commutator. This can also be a symptom of a bad armature
so you’ll want to carefully inspect the armature if you see lots of sparks. Replacing the shunted motor brushes is a repair
that you can do yourself, and I’m going to show you how. Hi. I’m Mark Sodja. Do-it-yourself repairs like these are easier
than you might think. From lawn machines to cordless drills, kitchen
mixers, outdoor grills, our how-to videos walk you through each repair from start to
finish, so doing it yourself means never having to do it alone. Let’s get started. I’ll begin by removing the motor cover from
the lawnmower. Now, remove the brush holder covers from both
sides of the motor. With the cover removed, now I can go ahead
and remove the brush holders. The brush shunt is crimped to this wire lead. The problem is the crimp is part of the wire
lead assembly. If you want to replace this the same way with
a crimp, you’ll also need to replace the lead. Another option you have and what I’m going
to do is just simply cut the wire lead away from the brush
and I’ll just strip this back and solder the new brush on. To start, I’ll strip back about a quarter
of an inch of insulation from the wire leads. Now I’ll twist the shut wire from the brush
with the wire lead together. I’ll play a little bit of soldering flux to
the connection and now I can solder the two wires together. Now I can solder the second brush in place. With the brushes soldered in place now, I
can install them back into the brush holders and I’ll slide the brush holder back into
the motor. Now, tuck the wires down into the holders
on the motor and replace the brush holder covers. I’ll finish up by replacing the top cover. That’s all it takes to install new brushes
in your lawnmower. Be sure to check back often for new videos
and expert advice. If you found this video helpful, give us a
thumbs-up and leave a comment.”

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