I had an experience with a bent motor shaft many years ago with one of
the skinny motors. I straightened it out, verifying the process by
checking it in a lathe.
Things seemed ok for a while but some of the wobble came back. I don't
recall hitting anything else with so I’m assuming that the shaft had
some metal memory of the bend. Just my thought.
Personally I would replace the motor or armature as soon as you can as
the vibration is tough on bearings and could cause the magnet to break
free.
With that in mind I purchased a very good blade balancer.
https://www.magna-matic-direct.com/products/mag-1000-balancing-instrument.html
<https://www.magna-matic-direct.com/products/mag-1000-balancing-instrument.html>
I couldn’t believe how much quieter the deck got after I used it. Not
cheap but well worth it in my opinion.
Good luck!
Take care,
Dean
On Nov 14, 2021, at 12:36 PM, Chris Zach via Elec-trak
<elec-trak cosmos phy tufts edu> wrote:
Took the E20 out yesterday to start on the leaves. The process is
deck, tractor, vacuum, trailer with very big bag. The right deck motor
has a slight axle wobble but it wasn't the end of the world. So off we
went.
Then I noticed it was vibrating a *lot* more so I decided to swap out
the armature. Not a biggie, just used a spare I had, took the top off
the motor, dropped the armature through the bottom leaving the casing
and magnets on, then put it all together. Fired it up, noticed it was
still vibrating a bit, then saw another problem.
The bracker that goes around the mower motor to hold it on the deck
had broken off in one spot. *Great*. The second spot had a crack in it
right by a mounting bolt, but the first one was broken off in two places.
Normally I would pull the motor but these are getting rare. So out
came the wire brush to clean up the edges and the collar on the motor,
and out came the Elec-Trak welder, also known as the "glue gun".
The welder is pretty good, but you're doing DC stick welding so it is
a bit tricky. Went to get my helmet and found that my good helmet (the
auto-dimming one) was missing, leaving me with the stupid standard
helmet. Which is a pain because you can't see *ANYTHING* until you
strike the weld, usually in the wrong location.
So out came the 300 watt portable Halogen light which gives me a very
very dim view of the work when I shine it right on the spot to be
welded. Stuck some arcs, got used to it, and happily tack welded the
flange part back on.
That should hold for leaf season, but once I'm done with that I'm
going to put the deck up for repairs and properly re-weld it. Glad to
have the welder, it comes in *very* handy for problem projects like this.
Question: Can a motor repair shop straighten a bent motor shaft?
Should I pull the bearing or will they do that?
C
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