I have a customer with a 6525 that is jamming quite a lot. jam code J9110. the feeder will eventually not separate the doc's and then cause the feed senor not to shut off then jam. I have replaced feed roller kit mk470. checked all the sensors. cleaned all other feed rollers. doc feeder opt count(approx. 40,000) Kyocera does not have doc feeder as separate orderable item.