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They may have different part numbers yes, but when you set them side by side 257, 455, they are indistinguishable. I would have no qualms about substituting. one for the other.
Years ago we had a strange issue that tracked back to substituting the wrong heat rollers. It was on the Ricoh AF350 versus AF1035. One of them slightly thinner wall than the other, and did not heat up at the same rate, throwing fuser codes. Then we got the Katun substitution that had the C-ring slots a little too far apart, and the heat roller bearings would slip out of the frame. We were stuck with those. I had some custom shims made up, like washers ~1mm thick. Two of these shims behind the clip kept the roller in. Anybody remember the AF350?
If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
The "Comparison with e-STUDIO205L/255/305/355/455" portion of the service manual shows the hot roller being unchanged across the series' as does the '7' series...I don't currently have both of them on hand but I'd say as long as they weigh the same then their thickness is the same as well.
I remember those Ricoh models ..they came out with that thinner hot roller for reasons they made up in a bulletin...we had tons of them rip apart right in the middle of the hot roller...copier engineers... *rolls eyes*
damn Blackcat4866... i better not start having nightmares again.... thanks for bringing up bad memories
Hey! lets put the cleaning unit on top of the drum and expect a flimsy spinning Mylar to skoop up the toner and move it 180 degree into the collector screw! ...sounds legit!
Also, lets make the quality control stuff either tank the toner concentration or just stop adding toner
Hey! lets also remove that grounding strap for the drum that never failed and expect a bearing to ground out the drum shaft.
it's OKAY we will then spend the next 6 iterations of this model engineering ways around these flaw..er..features we designed.
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