Jeff Barber Posted February 25 Posted February 25 I'm new to the group and have a Robbins & Myers ceiling fan, List# 3229. I'm performing maintenance on the fan, and I want to ensure I do it correctly. Any information on this fan is much appreciated. Thank you! Quote
Jeff Barber Posted February 27 Author Posted February 27 I'm looking for any maintenance information on this fan. What type of oil do I use? Do I need to replace the bearings, or just clean and oil? How often do I need to add or change oil in the oil cup? Quote
Stan Adams Posted February 27 Posted February 27 You have an R&M 'Sawtooth", great fan. If the bearing is really worn or rough, change it. If not, reuse it, I seldom change them. Unlike desk fans, ceiling fans use ball bearings, so regular motor oil is fine, desk fans require non-detergent. I normally put straight 30wt motor oil in mine. Be careful with that switch, it is worth more than the fan. I use a bent paper clip to check oil level, you want it about 3/4" below top of oil cup. Quote
Jeff Barber Posted February 28 Author Posted February 28 Thanks for the information, Stan. Is it normal for a small amount of oil to seep past the seal? When I disassembled the fan there was a small amount of oil in the cup. The fan has been installed in our family cabin for almost 50 years and only gets limited use during summer months. Quote
Stan Adams Posted February 28 Posted February 28 Yep, it also gets dirt in there that soaks up oil. Quote
Jeff Barber Posted February 28 Author Posted February 28 How do I remove this brass washer, to get the bearing off? Quote
Jeff Barber Posted March 12 Author Posted March 12 Russ, thank you very much for the patent drawings. Looking at Fig. 1, I'm trying to determine how to remove the rotor. Does the fixed center shaft unthread and get removed with the rotor? Quote
Stan Adams Posted March 12 Posted March 12 Been a very long time since I worked on one of those Jeff, but if memory serves me correctly, it just pulls off. Quote
Jeff Barber Posted March 12 Author Posted March 12 I would think there would be some type of retainer. Otherwise, the rotor could potentially drop out of the fan housing once installed on the ceiling. Quote
Stan Adams Posted March 12 Posted March 12 The oil pan holds the bearing & rotor in. When you take the oil pan off, the rotor & bearings generally come off the shaft. The exception is the later Hunters which have a nut that holds the bearing. I’m thinking that thrust washer has gotten squeezed onto the shaft. Quote
Jeff Barber Posted March 12 Author Posted March 12 If I cut the thrust washer off, could I replace it with a similar copper washer? If not, where would I find a replacement? Quote
Stan Adams Posted March 13 Posted March 13 I would think any copper washer that size would work Quote
Jeff Barber Posted March 14 Author Posted March 14 Stan, I'm planning to use a dry paint brush and a vacuum to clean the dust off the windings. For the rotor, should I take some emery cloth and clean the plates on the rotor? I'm not sure if this is build-up or varnish? Quote
Stan Adams Posted March 15 Posted March 15 I would leave it alone, or spray it with a light coat of lacquer, otherwise you may cause a short in the laminations of the rotor. Quote
Stan Adams Posted March 30 Posted March 30 I was hoping someone with more knowledge on years could help. My guess is late teens to mid 20s. Quote
Steve Cunningham Posted April 1 Posted April 1 I’d say 1915-1925. It’s a type H. If you look at the brackets, they should have a very stylized H cast into them. Quote
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