He also mentions testing the rotor before putting it back into service: putting something protective (he suggests glove leather) around the gear and using pliers to turn the gear: I have used the above method in the past, and it does work: my original 1970s treatment was good for over 20 years especially noteworthy since i was using vegetable-based 3-in-1 oil and did not clean nor lubricate the exposed gearing. Clocks. [CDATA[ 3. Tested and works. We have developed our own techniques which we have found to work most reliably. These clocks are plenty old enough to have had their lubrication become gummy, dried out, or otherwise no longer viable for its original purpose. During the June 2021 rejuvenation, the oven clock/timer rotor described above had about an 18C temperature rise above ambient before treatment (and was noisy). If there is any confusion on billing, we are happy to work with you to resolve it in a polite and civilized fashion. The result is an all-original motor restoration with longer life than the originals. C $235.84. Seventy to 80 years later, this oil is long gone and the bearings worn. Otherwise, Manufacturer lead times may apply; The Manufacturer's original warranty will apply. Leather cases cannot be restored in our shop. machines operating by providing a high quality source of original Telechron rotors. Many repair folks prefer to replace cuckoo clock movements instead of repairing the originals. //