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Tractor Talk Discussion Forum

old sealed bearings

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Ian Cameron

03-04-2005 20:42:21




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I recently purchased a 1962 JD 95 combine. It appears to be in very good shape. I am worried that the sealed bearings on the cylinder, beater and straw walkers will contain hard grease after 45 years. Should I replace these bearings before using the machine to combine.




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wdtom

03-06-2005 13:38:57




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 Re: old sealed bearings in reply to Ian Cameron, 03-04-2005 20:42:21  
If the seal looks to be rubber you can carefully insert a small smooth screwdriver under the seal at the small side and it will lift out, you can clean and grease as you wish, and carefully press the seal back in. If the seal is metal, drill a 1/16" hole in it, carefull not to break the drill off in it. Squirt some grease in with a pointed grease nozzle. Now claen the area where the hole is with a degreaser and put a drop of silicone gasket sealer over the hole. If you do this before the bearing goes you can probably double the life of them----- again and again. I use both of these methods, they work.

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Dr Bert

03-06-2005 12:44:51




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 Re: old sealed bearings in reply to Ian Cameron, 03-04-2005 20:42:21  
I'm not familiar with these particular bearings, but many can be opened up using a sharp pointed probe to lift the seal. Then cleaning and repacking is a cinch. I suggest pulling one and see if you can pop the seal



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thurlow

03-06-2005 16:37:40




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 Re: old sealed bearings in reply to Dr Bert, 03-06-2005 12:44:51  
Don't know about "pulling one and seeing if you can pop the seal"; been running combines since the mid '50s and have changed untold numbers of bearings..... ..the number of sealed bearings I've taken off without destroying them could probably be counted on one hand.....



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Nebraska Cowman

03-05-2005 18:03:42




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 Re: old sealed bearings in reply to Ian Cameron, 03-04-2005 20:42:21  
sealed bearings are real prone to rust. They work fine as long as they are in use but they get dry and then if stored outside the draw moisture and the balls get rusty. When you start the machine they self-destuct. I wouldn't worry abut changing them all but do keep a close eye on all parts of the machine. I help a man cut wheat and I always walk around the combine every time he dumps a load in the truck. Lots of times I notice things he did not hear in the cab.

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JMS/MN

03-05-2005 08:18:01




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 Re: old sealed bearings in reply to Ian Cameron, 03-04-2005 20:42:21  
Run it for a while and hand check each bearing for heat. If the seal is plastic you may be able to insert some grease with a syringe, or drill a small hole in the seal.



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txblu

03-05-2005 05:59:15




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 Re: old sealed bearings in reply to Ian Cameron, 03-04-2005 20:42:21  
Sealed bearings to me are regular bearings with a metal or plastic "dust cap". That means that they will accept liquids including "Chain Lube", lube of choice for all my old bearings that haven't failed.

In a pressurized can with a plastic snooz. Stick the nozzle right at the sealing media adjacent to the inner race and give her a good squirt. I repeat several times a season. If you can do it and roll the bearing so much better. Be careful powering machinery while doing it. Great idea for the bearing. Maybe LETHAL for you.

Chain lube is made for chain drive things like motorcycles. It sticks to metal and has an excellent lubricant.

Saves a lot of worry about failures and hassle removing and replacing bearings that may just need a little rejuvenation.

Mark

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dr.sportster

03-05-2005 04:29:54




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 Re: old sealed bearings in reply to Ian Cameron, 03-04-2005 20:42:21  
If it aint broke...



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paul

03-04-2005 22:36:18




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 Re: old sealed bearings in reply to Ian Cameron, 03-04-2005 20:42:21  
When was it last used? Surely it didn't sit still for 45 years.

Generally those bearings get replaced every 10-30 years, so likely not originals in it????

If it was used last year, probably would inspect for obvious problem & leave them alone if it was mine.

--->Paul



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