Xerox xd155df laser printer

I am having problems with paper jams on my xd155df printer. I can put soap on the pick rollers allow the paper to be picked up. I finally found new new papeer pick up roller tires for replacement. Are there any directions available as to how to install these small rubber tires, there are two per tray.

Instructions or a service manual for this printer would be terriffic. It has performed perfectly for many years and I'd like to keep it going.

Many thanks,

Larry