arround 1.8 - 2.5 mil I have changed the main drives the motor and the gear running fuser will eventually wear out.. there is thread about this on the forum. I usually order the whole drive unit assembled in factory as there was a batch of spare motor shafts that had slight dimension intolerances and when put in the old drive unit it had a heavy drive and wear out quick or even worse produced issue, jam, noisy, C-code.
They good machines please don't get me wrong, as long as you have mods in they are sweet as a nut. Have you got the copper like looking springs on feed units ?
few good threads
Duplex:
http://www.copytechnet.com/forums/sh...ght=km6030+mod
Jam 50 or 46
http://www.copytechnet.com/forums/sh...t=km8030+habik
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