unknown

asked Aug 14, 2000 at 7:31pm
Hp HP LaserJet 4

HP 4+ Never seen this before!!

Replaced fuser last October. (refurb) Customer has started to get random oily marks on the first 1 or 2 sheets after printer has sat awhile. Checked the cartridge and trans roller and all appears good. When I turn the rollers in the fuser, you'd swear there is liquid under the skin of the lower roller. Did this and then let it sit for awhile and then little specs of moisture would start to appear in various spots on the lower roller. (and it is oily) The fuser gears, drive gears, output rollers, paper path are all free of any apparant contamination. Ever seen this, Moe?
: Replaced fuser last October. (refurb) Customer has started to get random oily marks on the first 1 or 2 sheets after printer has sat awhile. Checked the cartridge and trans roller and all appears good. When I turn the rollers in the fuser, you'd swear there is liquid under the skin of the lower roller. Did this and then let it sit for awhile and then little specs of moisture would start to appear in various spots on the lower roller. (and it is oily) The fuser gears, drive gears, output rollers, paper path are all free of any apparant contamination. Ever seen this, Moe?

I haven't seen it personally but I've heard about it a few times. A tech once emailed me and told me that the lower pressure roller was filled with silicon oil and it leaked out. He claimed to have seen the problem numerous times. Strange that I've worked on hundreds of them and never seen it once? I cut open a couple of rollers that we'd changed during fuser rebuilds and found them all dry. The liquid is an illusion, it's really only an air bubble. I can't comment on the oil spots since I have no idea where it's coming from. I'd try and stop the paper just as it hits the fuser, pull it out and see if it's happening before. Those fusers, especially the cheap rebuilds have toner buildup problems in the center area, perhaps you are mistaking that for the stains. It's hard to diagnose when I'm not seeing it. Of course if I had it in the shop, first thing I'd do is pull a fuser off the shelf and try it. Ours are quality rebuilt. We use OEM Canon upper and lower rollers, not the cheap 3rd party stuff that lasts 6 months. Hope this helps.

by moe on Aug 14, 2000 at 11:05pm Add comment
: : Replaced fuser last October. (refurb) Customer has started to get random oily marks on the first 1 or 2 sheets after printer has sat awhile. Checked the cartridge and trans roller and all appears good. When I turn the rollers in the fuser, you'd swear there is liquid under the skin of the lower roller. Did this and then let it sit for awhile and then little specs of moisture would start to appear in various spots on the lower roller. (and it is oily) The fuser gears, drive gears, output rollers, paper path are all free of any apparant contamination. Ever seen this, Moe?

: I haven't seen it personally but I've heard about it a few times. A tech once emailed me and told me that the lower pressure roller was filled with silicon oil and it leaked out. He claimed to have seen the problem numerous times. Strange that I've worked on hundreds of them and never seen it once? I cut open a couple of rollers that we'd changed during fuser rebuilds and found them all dry. The liquid is an illusion, it's really only an air bubble. I can't comment on the oil spots since I have no idea where it's coming from. I'd try and stop the paper just as it hits the fuser, pull it out and see if it's happening before. Those fusers, especially the cheap rebuilds have toner buildup problems in the center area, perhaps you are mistaking that for the stains. It's hard to diagnose when I'm not seeing it. Of course if I had it in the shop, first thing I'd do is pull a fuser off the shelf and try it. Ours are quality rebuilt. We use OEM Canon upper and lower rollers, not the cheap 3rd party stuff that lasts 6 months. Hope this helps.

I've seen the center build-up that causes ghosting many times, but this is different. (translucent stains) But I think you're right about cheap parts on rebuilds. I think it's time for a switch. Hopefully I can find someone in Canada that does a quality job. Tks for your input.

- unknown