Cross-reference: Ricoh 841578, the Print Cartridge Type MP C3501 (black, 22,500 pages). For use with: Ricoh Aficio MP C3001, Aficio MP C3501. The same machines were also sold as: Savin C9130 / C9135, Lanier LD630C / LD635C. Full set: Black 841578, Cyan 841423, Magenta 841422, Yellow 841421.

Frequently Asked Questions

The panel says toner is low but my pages still look fine — replace now or wait?

Wait, but be ready. Low-toner warnings appear well before the cartridge is truly empty, and print quality is the honest signal: keep printing while text stays dark and even, and swap when pages begin to fade or streak. With a 22,500-page cartridge the warning window itself can span hundreds of pages, which is exactly why judging by output beats judging by the message.

Does shaking the cartridge near the end actually help?

Briefly, yes. Rocking a nearly empty cartridge side to side redistributes the remaining toner and can recover a short run of acceptable pages — enough to finish a job, not enough to change the outcome. Treat it as an emergency bridge while the replacement goes in, not as a way to stretch the cartridge's rated 22,500 pages any further.

Is this the cartridge my machine asks for by number?

This listing is the high-yield black cartridge, reference 841578, built for Ricoh Aficio MP C3001 and MP C3501. A standard-yield cartridge fits the same machines and may be what was installed before; this one simply holds more — 22,500 pages' worth — so the machine will ask for it far less often.

How do I know the old cartridge is really finished?

Three signs together settle it: repeated light or streaked output that a gentle rock no longer fixes, the machine's toner gauge at empty, and no improvement after reseating the cartridge. One sign alone can mislead; all three mean the toner is genuinely spent.

Should I keep a spare on hand for a cartridge that lasts this long?

For a single relied-upon machine, yes. Because this cartridge runs up to 22,500 pages, replacements are rare — and rare events are the ones nobody prepares for. A sealed spare on the shelf, stored flat and out of sunlight, turns an out-of-toner stoppage into a two-minute swap, and orders otherwise ship fast from IL, PA, GA or CA.

What if the replacement turns out to be faulty?

Every compatible cartridge we sell is backed for a full year, and returns are free for a year as well — the details live on our shipping & returns page. Reach our team Monday–Friday, 9 AM–5 PM CST with the machine model and a sample of the problem pages, and we will replace or refund under that cover.

About This Ricoh 841578 Black Toner Cartridge

Sold here as a single high-yield black cartridge for the Ricoh Aficio MP C3001 and MP C3501, this 841578 unit is rated at up to 22,500 pages and costs $66.18. The extra capacity is aimed at offices tired of mid-job stoppages: install it, and black toner stops being a recurring errand. Questions before ordering are welcome during support hours, and the wider range for these machines is collected on our Ricoh toner page.