Originally Posted by
slimslob
The 1515, 201 and 301 are all entry level machines intended for an average monthly volume of 2K with a maximum of 5K. Rated PCU life is only 45K but expect them to seldom last more than 30K, especially in light usage machines, opening between the toner mixing auger and the auger under the development roller tends to clog and causes the gears to strip and main motor lock errors.
1515 and 201 both use the same toner with expected yield of 7K. 301 is slight higher at 8K.
2851 and all other using the same PCU can suffer the same clogged opening as the entry level machines if you try to push PM interval too far and strip gears. I have also had them take out gears in the main drive gear box. Main cause was developer working it way through bushing at the back of the mixing auger and building up in the cavity around the gears. The 2 gears on the development roller assembly are the main ones to fail and the drive coupler can also round out and turn on the shaft. Have all 3 with you when you go to do as PM. If you see worn teeth on the gears, replace them. After dumping the developer and before putting new in, use a paper clip to clean out the opening between the two chambers. I recommend having a pair of gardening gloves when you go to load the new developer. You will most likely have to turn the augers back and forth a number of times to get all the developer in and level. The gears can get a bit rough on the thumb.
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