My Bachmann motor with brass flywheels on each end has developed a flat spot.
I have to give the motor a spin to get it to go.
I was thinking I would like to get it apart to see if there is a wire off one of the segments or just to see if I can find the problem.
Anyone had one of these apart?
Removing one brass flywheel could be a problem, ideas?
Bachmann sent me a new motor,and the old one back as well
so this one is something I can pull apart.
Jim
I usually press them off in a lathe to avoid bending the shaft. But an alternative is to cut a slot in a piece of strap iron about 1/8" thick. Cut the slot wide enough to slip between the body of the motor and the flywheel. Lay the iron across the jaws of a partially open vise, with the motor hanging down between the jaws. Then use a suitable pin punch and a small hammer to drive the shaft out of the flywheel. If you do this carefully, you can do it without bending either the shaft or the punch.
Please let us know what you find.
Here are some more possibilies.
http://www.geocities.com/budb3/arts/meth/gpul.html
http://markschutzer.com/Brass_Clinics/RebuildingBrass2006small.pdf
Scoll down to pulling gears and wheels.
Take your time.
Rich
Thanks for the tips on getting the brass flywheel off.
The only metal with a gap in it that I had was a claw hammer with
a loose handle.
I was able to twist off the business end of the hammer and put the
claw in a vice.
After getting nowhere with several hits, I took my Propane torch to the
brass flywheel to expand it without melting the plastic coupler inside.
A couple more hits and it came off.
A picture shows what did not get done right when it was assembled.
The copper wire motor winding is shown below the solder pad.
http://www.okanagan.net/ocarc/news/bachmann-motor.jpg
Using my smallest tip I was able to solder it, reassembled the motor and now works correctly.
Jim
Hi bcjim
That is one for the books. As a retied machine mechanic, I love to see innovation like that when in a difficult situation. Congratulations on a job well done.
Rich
Second that one! Stephen
Way to go Jim. There is a lot of satisfaction in being able to pull off a repair like that one.
another Jim
Congratulations, nicely done. "Where there's a will, there's a way".
And to think I thought it was, Where there is a will, there is a relative. ;D