Mike's Clock Clinic's M-31 Rotor in Various Stages of Repair

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Mike Murray overhauling (rebuilding) a M-31 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.

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A service from, E-mail address: Mike@atmos-man.com 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

My Web site is located at http://www.atmosman.com/

Main FTP site is located at http://www.home.earthlink.net/~atmosman/earthpdf.html

Back to Mike's Clock Clinic's Main Web Page

Back to the Motors and Rotors Page

Mike Murray overhauling (rebuilding) a M-31 Rotor in Various Stages of Repair

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.

Copyright © 2010 - 2022 Michael P. Murray & Mike's Clock Clinic

Back to the top of this page

Back to the top of this page

Created in August of 2010 and last updated January 01, 2022.

Mike Murray overhauling (rebuilding) a M-31 Rotor in Various Stages of Repair

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.

Copyright © 2010 - 2022 Michael P. Murray & Mike's Clock Clinic Back to the top of this page

Back to the top of this page

Created in August of 2010 and last updated January 01, 2022.

Copyright © 2010 - 2022 Michael P. Murray & Mike's Clock Clinic

Back to the top of this page