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Old 04-27-2014, 05:40 PM   #1
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Can someone tell me if this is normal

I was repackimg bearings today and noticed a brown stain on the inside of the inner bearing and on the bottom of the spindle where the bearing sits. I have heard this is normal it is some type of corrosion from sitting here is a pic any info would be great. The bearing looks perfect besides thisClick image for larger version

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Old 04-27-2014, 06:00 PM   #2
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Hello there and welcome, If it is corrosion, you should be able to feel it, rough, pitted and so on. If it is really smooth, and you can not feel the markings, I would say at one time or another the inner part of the bearing spun on the axle stub. Bearing material is really super hard metal and most of the time does not rust due to the type of metal and being in grease.
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Old 04-27-2014, 06:01 PM   #3
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Would u say the bearing is still ok for repacking
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Old 04-27-2014, 06:22 PM   #4
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In my opinion, it is from extended grease changes, but I'm not 100% sure. Seen it before, with no other damage. It doesn't look like heat which would be purple/blue. It's not pitted, like rust. It is just smooth, and brown.
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Old 04-27-2014, 06:23 PM   #5
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The inner race never spins unless the rollers seize, and if they had seized you wouldn't be repacking them. It is normal and fine, go ahead and pack them up...

Tim
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Old 04-27-2014, 06:28 PM   #6
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Quote:
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The inner race never spins unless the rollers seize, and if they had seized you wouldn't be repacking them. It is normal and fine, go ahead and pack them up...

Tim
I Agree!
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Old 04-27-2014, 07:45 PM   #7
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If you enlarge the picture it looks like there are some pits in the rollers. I would examine them real good and see if they are pitted or not. Far as the stain, that is what it looks like, a stain. That won't be a problem.
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Old 04-27-2014, 09:38 PM   #8
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Fearings are relatively cheap--if you are going thru all 4 axles, why not just replace them, and the seals?
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Old 04-27-2014, 09:42 PM   #9
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I hope seals are getting replaced every time, as they get damaged upon removal.
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Old 04-27-2014, 09:53 PM   #10
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The inner race never spins unless the rollers seize, and if they had seized you wouldn't be repacking them. It is normal and fine, go ahead and pack them up...

Tim
O yeah it can seen it happens all the time on 3/4 nad 1 ton truck and TT of any kind

more so if at one time it had one do it befor then latter installed a new race

wet spray paint can help if there is low play on the race to the shaft
but i just take a punch and put a small mark on the shaft its self to stop it
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Old 04-27-2014, 09:59 PM   #11
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If you enlarge the picture it looks like there are some pits in the rollers. I would examine them real good and see if they are pitted or not. Far as the stain, that is what it looks like, a stain. That won't be a problem.
I'm with MnTom, on this one , bottom edge of the tapered roller at the front of the picture looks pitted, next to the cage, what does the race look like ?
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Old 04-28-2014, 04:22 AM   #12
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What you seeing in the pic is leftover bearing grease it was not clean all the way when I took pic
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