Trailer bearings

[John2001]

I was repacking my wheel bearings on the travel trailer and noticed the color changes on the inside of some of the bearings. Parts of it have a blue tint, almost like they were hot at one time. Is this a normal looking bearing for a 4 year old trailer? I bought the trailer used, so I'm not sure how many miles are on them. The axle looks fine.

[rambrush]

Usually blue indicates been hot at some time.
Bearings and races are cheap insurance easy to replace good piece of mind.
Herbicdal would probably even vote for replacing.

[John2001]

Thanks Rambrush, the blue area made it look like it got hot, but I didn't think a bearing could get that warm! The grease looked old and dirty. New bearings on order. ebatmus.com has some good prices on name brand bearings and seals.

[rambrush]

Thanks!
Yes they can get that hot, in my other life I worked in a u-haul repair shop and rebuilt there equipment. Needless to say I saw a lot of bearings come through.