Back to Mike's Clock Clinic's Telechron Web Page
Mike Murray Overhauling (rebuilding) a M-31 Telechron Clock Rotor in Various Stages of Repair
The Telechron M-31 was the mainstay "B-3" rotor that was used in nearly
all of the chiming G.E., Herschede, Revere, and Telechron mantle and tall case clocks
for all of the 1930's and into the 1960's. The next most popular rotor was the "B-3"
M-2377. It is identical to the M-31 except it was manufactured for a specific
Telechron customer.
The Telechron rotor must be opened in the same way it was sealed
at the factory. This way the rotor stays its original size. Other
"repair people" will cut the rotor open and that will lead to a
shorting of the rotor and will weaken the side walls of the rotor.
All wheels are checked for looseness on their individual shafts.
This check is vital and must be done for each wheel.
Both top and bottom plates are cleaned and then checked for worn
and oversized bearings. Each bearing must be the correct size or
there will be a power loss.
Here's a few of the pictures at various steps in the process.
The rotor is now open and here's what we find inside on the top plate.
Here's all the parts after cleaning.
After cleaning and partially assembled.
Now lubricated with synthetic lythium grease.
Now the body is assembled and ready to test.
The body is joined with the container.
The rotor is back together and ready for full load testing.
After the rotor passed the load test for at least 24 hours, the rotor
is sealed with epoxy and ready to be shipped. The total process takes
about 4 days.
Here's the link to the cost of a "B" rotor overhaul.
Back to the Motors and Rotors Page
A service from, E-mail address: Mike@telechron.us (Preferred contact method)
Mike Murray
Founder of Clocksmiths
A specialist in Atmos and 400-day clock repair.
Also, I overhaul most plug in electric clocks. In continuous service since 04/01/1982.
Mike's Clock Clinic Memberships: Clocksmiths & NAWCC
P. O. Box 562
1151 D Street
Fossil, OR 97830-0562
Phone: 541-370-2440 (Please E-mail rather than call.)
My main Web site is located at http://www.atmosman.com/
Main FTP site is located at http://www.atmosman.com/earthpdf.html
Back to Mike's Clock Clinic's Main Web Page
Back to the Motors and Rotors Page
Copyright © 2010 - 2022 Michael P. Murray & Mike's Clock Clinic
Created in August of 2010 and last updated January 01, 2022.