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Author Topic: Bodine Sync motors overheating on occasion Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 01-04-2010 02:02 PM                     The motor is very simple. The rotor is just a complicated lump of metal. There are a few coils in the stator, relatively foolproof but occasionally windings short together because of poor or abraded insulation (it's just a paint-like coating). The two bearings are easily replaced and are inexpensive standard types. The two capacitors are prone to aging badly, but are cheap to replace as well. The motor will overheat when run with out-of-spec capacitors - although they run pretty hot even when all is perfect. The caps will be available at any motor repair shop. You can have the shop change them for $$$ (probably replace the bearings and blow dust out as well) or do it yourself for much less. Just mark the wires so you get them on the right lugs. Much smoke and distress can result from mixing these up!  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 01-04-2010 05:49 PM                        Swap capacitors with a known good motor and follow the trouble/ Louis  |  IP: Logged John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 01-04-2010 07:49 PM                     I'm not really up on motor caps, but caps can fail in ways other than changing their capacitance. Their equivalent-series-resistance can change (increase). I guess that's about it. They can short or go open, but you'd find that with your cap meter. --jhawk  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 01-05-2010 01:32 AM                     I remember (slightly) on how to check caps with a VOM: 1-discharge the cap 2-set the rating to Ohms x 100k 3-If resistance falls to zero then arises, cap is normal 4-If resistance stays at zero, cap is shorted out 5-If resistance remains high, unit has opened up. Please correct me if this is incorrect .. thx-Monte  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 01-05-2010 08:21 AM                     Thats correct for those tests Monte but that isn't going to show you if the capacitor has changed value which in your case may be the more likely problem. Many digital meters have at least a simple capacitance checker built into them now... Mark  |  IP: Logged

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