Spinneyhill Posted November 4, 2015 Share Posted November 4, 2015 I am replacing the ball bearing in my 1930 Delco Remy generator. The one I am taking out is sealed (it rumbles) and the one I have bought is sealed. Should I leave it sealed or remove one seal to allow oil in? The generator has oil caps. If I leave the bearing sealed, should I bother oiling it? i.e. will the oil get in? The bearing is a NTN 6203LU (40 mm OD, 17 mm ID, 12 mm thick). Link to comment Share on other sites More sharing options...
cahartley Posted November 4, 2015 Share Posted November 4, 2015 If it will make you feel better remove ONLY the seal/shield that's on inside.Mind you shielded/sealed bearings are made to serve for thousands of hours out of the box. Link to comment Share on other sites More sharing options...
ArticiferTom Posted November 4, 2015 Share Posted November 4, 2015 You may want to search over on Model A or Ford Barn forum . I just read something about them taking there generators and making modification to sealed bearing . I would think best leave it sealed and oil NO more . It will eliminate oil on the brushes and commutators . Link to comment Share on other sites More sharing options...
Guest Rp1967 Posted November 4, 2015 Share Posted November 4, 2015 Leave the seals in and forget the oil can Link to comment Share on other sites More sharing options...
Friartuck Posted November 4, 2015 Share Posted November 4, 2015 I have replaced the original bearings with sealed versions on a 1930 DELCO (model 193C) Starter-Generator for a Lincoln and they work fine as a sealed bearing. Don't touch them. Leave the oil cup on for decoration. Link to comment Share on other sites More sharing options...
rsb Posted November 4, 2015 Share Posted November 4, 2015 The only issue is forgetting the sealed bearing is in place. If you continue to add oil to the cup, it will have nowhere to go but down into the inside bottom of the generator. Link to comment Share on other sites More sharing options...
startergenrebuilder Posted November 4, 2015 Share Posted November 4, 2015 Leave it sealed, no doubt. If you want to make sure you or someone else doesn't accidentally oil it in the future, fill the oil cup with silicone. I do that so customers don't keep putting oil in to them and I also let the customer know that's what I did.-Jason 1 Link to comment Share on other sites More sharing options...
Spinneyhill Posted November 4, 2015 Author Share Posted November 4, 2015 Thank you everyone for your replies. Sealed it is, with blocked oiler. Link to comment Share on other sites More sharing options...
Rusty_OToole Posted November 4, 2015 Share Posted November 4, 2015 I would pack it with hi temp grease first. The so called sealed bearings I have seen have nothing in them but a drop of thin oil, not the best for long life. If you don't want to disturb the seal use a grease gun and needle. Link to comment Share on other sites More sharing options...
startergenrebuilder Posted November 5, 2015 Share Posted November 5, 2015 Get a premium bearing and you should have no issues. I only buy and stock the best bearing I can get and can not recall having one fail. Link to comment Share on other sites More sharing options...
Rusty_OToole Posted November 5, 2015 Share Posted November 5, 2015 Neither have I since I started greasing them. Link to comment Share on other sites More sharing options...
Spinneyhill Posted November 5, 2015 Author Share Posted November 5, 2015 thanks for that. My bearing is NTN. It is stiff to turn, like it is full of grease rather than oil. But I'll try injecting a little more. Link to comment Share on other sites More sharing options...
ArticiferTom Posted November 6, 2015 Share Posted November 6, 2015 I would not mess with them . There made sealed for a reason . Factory lubed is all that is needed . Heat and even a pin hole may leak .I believe NTN is a very good product ask them . Tom Link to comment Share on other sites More sharing options...
Spinneyhill Posted November 6, 2015 Author Share Posted November 6, 2015 I put the bearing in yesterday, as is. It felt well lubricated. When I motored the generator ...... silence! Except for a slight hiss from the brushes on the commutator. No rumble from the puffed front bearing. Problem fixed! Thanks everyone. Link to comment Share on other sites More sharing options...
cahartley Posted November 6, 2015 Share Posted November 6, 2015 Sealed bearings are factory packed with the optimum amount of lubricant.Ball bearings that run at high speeds will overheat something AWFUL if packed with too much grease....... Link to comment Share on other sites More sharing options...
Larry Schramm Posted November 8, 2015 Share Posted November 8, 2015 Get a premium bearing and you should have no issues. I only buy and stock the best bearing I can get and can not recall having one fail. This is the best advice from a top notch rebuilder! Link to comment Share on other sites More sharing options...
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