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Title: HP 3820 Service Station Gear Problem
Review: HP has had big problems with the HP3820. The Service Station Gears within the machine were not designed to withhold stress on the printer carriage. When the carriage is pushed - these gears easily break. HP does not sell these gears. I did find them on eBay. A search of "HP 3820 Service Station Gears" should get you there. Most of the problems described point towards these gears. Hope this helps.
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