HP Laserjet Series II

John Amirault <amirault(a)epix.net> wrote: Cleaning helps -- if the rollers have picked up dirt it will make it harder for them to pick up paper. But the fundamental problem is that rubber ages and gets hard. Once upon a time (mid-1980s) some of the HP CEs used to carry an aromatic fluid they called "Fedron" which was good for restoring the gumminess of hard rubber rollers. I saw them use it on 2601 (Diablo 630) platen rollers and the little roller in the 2619 chain printer (a Dataproducts something) that drives one of the paper-jam detectors (roller not turning => paper not moving => paper jam, and when this one got hard enough that the paper just slid over it without turning it you got one frustrated computer operator). Is this stuff still available, or did it get banned because it's bad for the ozone layer? Not sure it would work for LJ II pickup rollers, they're a softer rubber. Nor am I sure what the fluid did, for all I know it stripped off a layer of the rubber. -Frank McConnell