Guys, I used to be a photocopier repair person. A quick and dirty way to clean rubber rollers like the pickup rollers is to use alcohol but the problem is that the rollers will work great until you're out the door. The alcohol really dries up the rubber and makes it even more brittle/slippery. The best thing to use is Simple Green in a 50/50 solution with water. This will clean off the gunk that is preventing the roller from working. Make sure to clean the Simple Green off, too. The other thing that works is to use sandpaper to take off the surface oxidation.
I worked as a printer guy on my very first contract and the LJIII rollers are not easy to do. I had to tear the whole thing apart to get to the pickup roller and, when that's out, the separation pad. It really was designed poorly from a maintainance standpoint. Practice makes it look easy. Contrast that to a LJ5Si that takes 15 seconds to remove the entire set of feed tires (all three - pickup, feed, and double-feed-prevention).
To get manuals, find a certified HP service tech who's willing to give you his old manuals. I couldn't get a set for myself when I worked for an authorised HP service center so don't feel bad if you can't.
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