1994 4Runner A/T 4WD
Replacing a bunch of bushings in the front suspension. Took the wheel bearing out to take a look but realised I have no idea how to tell if this one is shot and needs replacing or not. Here are some pics. What can I do/look at to know if I should replace. No records of previous owners ever replacing them but based on the deterioration of other parts of the front suspension I'm guessing these are original.

 

Toyota didn't use Timken, at least not back then, so they have been replaced.
Marlin crawler probably has kits with Jap. bearings and the needed seals and gaskets at a decent price.

 

Spin the bearing with your hand. IE: hold the inner race, and spin the outer race. Is it smooth, with no movement other than spin between the inner and outer race, no grinding, and so on.

Alternatively, just replace them all. If there are any that seem in decent shape that you remove, keep them for emergency spares.

I, personally, have had excellent results using Timkin bearings, but OEM do seem to be the best. That's just me, though, what little that's worth.

Good luck!
Pat☺

 

Here you go... I didn't review these "how to", but I have no doubt that they are accurate. I love Scotty Kilmer's videos. You need to clean them with fresh, clean solvent, and blow dry with compressed air, DON't spin the bearing with the air gun!. I'd get out my magnifying lens and strong light and look for pits, corrosion, flat spots, signs of overheating (discolored, typically some shade of blue or purple) Timken bearings are as good as any and better than most, especially the chicom ones that come with a Harbor Freight trailer, although I never had any problems with those either.

 

I have no issue with Timken as long as they’re USA made. I simply pointed out that the bearings pictured were not the original bearings because those would have been Koyo.
So many reputable companies are out-sourcing to China and Taiwan lately. And I don’t care what the name is on the box, if it’s not USA or Japan made I’m not interested.