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Author Topic: Double Mut GE Mina gear motor - gear box lubrication Robert Sobin Film Handler Posts: 6 From: North Royalton, Ohio, USA Registered: May 2013 posted 01-31-2019 01:51 PM                     Would anyone know what type of oil lubricant was used in the DC GE Mina gear motor gear box that was used with the Eprad double mut? I have a couple of these motors and they need to be re-lubricated. Info on the internet is scarce.  |  IP: Logged John Eickhof Jedi Master Film Handler Posts: 588 From: Wendell, ID USA Registered: Jan 2000 posted 02-01-2019 11:47 PM                        bodine and minarik worm drive gearboxes use 85-90 wt gear oil. some earlier ones used 140 wt gear oil if in warmer climates. in a pinch you can pack the gearbox with short fibre grease or lubriplate grease. if the box has a zerk grease fitting use only grease not gear lube. use light oil in cups on output shafts if so equipped.  |  IP: Logged Robert Sobin Film Handler Posts: 6 From: North Royalton, Ohio, USA Registered: May 2013 posted 02-02-2019 12:51 PM                     Thanks John, I have attached pictures of the motor which I haven't put into service yet since acquiring. The inside of the gear box looks like it was used with oil instead of grease. However the red plug on the gear box lid is not original and I don't know what type of fitting was there originally. I am guessing that I would not want to use a gear oil that is used in low slip automotive applications (differential). These types are more readily available in small volume.  |  IP: Logged John Eickhof Jedi Master Film Handler Posts: 588 From: Wendell, ID USA Registered: Jan 2000 posted 02-03-2019 09:28 PM                        i would go with 14wt gear oil. if the shaft seals leak then replace with short fibre grease. have fun!  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-04-2019 07:51 AM                     I'd use Mobil-1 synthetic gear lube 90 weight. I used that stuff in hundreds of gear boxes and never had to rebuild any. It lowers friction considerably. Mark  |  IP: Logged

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