View Full Version : km6030/8030 main drive gear chewd up

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07-21-2012, 03:42 PM
Hey, does anyone have an idea of what causes the main motor drive gear to get chewed up?
it seems there would have to be a major motor malfunction or the machine to keep going while the fuser is stopped?
Ive replaced one and am going to have to do it again, this time i have a new motor as well, but the old one looks good, the worm gear does not appear to be marred ... ive been told the gears under the fuser can get locked up? but they seem to spin freely... can the bearings freeze up under the heat? this would make sense except they seem to be in good order..
any insight would be cool.

07-21-2012, 04:03 PM
The typical life of a rebuilt fuser drive unit is 440K to 990K. I replace gear 88T (302FB22960) & fuser motor (302FB27231) and clean out all the old lubricant and re-grease, or the fusing drive assy (302FB93134). Clean the duplex PWB of steel shavings with compressed air and a soft brush. =^..^=

07-21-2012, 04:28 PM
hey thanks for the insight, i have been told about this gear and motor needing replaced every mill copies
the one i have trouble with is 770 or so copies, close enough hugh...
have you ever been told the white gears under the fuser unit can cause this?odd it seem the would get chewed up as well...

07-21-2012, 04:29 PM
We had started using the motor from the 620/820 to put into 6030/8030....they seemed to be a lot more durable. I also would clean and lubricate all the gears and shafts on the exit assembly to make sure none where gunked up and overworking that motor.

07-21-2012, 04:34 PM
you got the prt # off the top of your head?

07-21-2012, 04:46 PM
302FB25350 is the fixing motor itself and 302FB93132 is the whole assembly motor, gears, etc.

07-21-2012, 04:51 PM
very cool
thanks a mill

Toner Boy
08-28-2012, 07:27 PM
Thanks for this info, we needed it as well.

08-28-2012, 07:45 PM
fyi i replaced the motor,and the gear,cleaned all the gear shafts, lubed with marvel mystery oil ( ive been told this is the best for this) i used it in my 1995 gmc safari with 370k miles but never on a copier,LOL, anyway
the machine is running like a scared dog!!! thanks for the clues.

08-28-2012, 10:09 PM
Yeah we had a machine we had replaced about 3 fuser motors in in like a 5 month period. They printed out bank statements once a month so they really ran these machines. Once we swapped over to the other motor and cleaned all that stuff up we never replaced the motor again.

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