Originally Posted by
blackcat4866
Yes. I can think of no exceptions in 30+ years.
I have attempted to save partially seizing bearings in the past with generally poor results. Especially in the fuser, you cannot use oil. It will smoke and stink, sometimes for weeks. To get high temp grease like HP500 or Uniflor 8172 into a sealed bearing you must unseal it, prying off the cover, which is usually then too damaged to re-install. I will say there have been a few successes though.
Lately Kyocera techs will confirm that we've had a rash of bearing issues on the FK-8550H fusers. What I discovered recently is that the bearing 6901Z is NOT failing. It's the soft pressure roller shaft spinning within the hardened inner bearing race, reducing the diameter of the pressure roller shaft and generating piles of iron dust. I believe if the initial diameter of the shaft was larger and the bearing press-fit, it wouldn't spin on the shaft. It's not like these fusers are serviceable, and we'd have to get those bearings off at any time.
=^..^=
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