Saturn gear noise-Strange one

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  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 22942
    #1

    Saturn gear noise-Strange one

    With the right side cover off, you can see and feel the transfer cleaning drive jumping whenever the main motor drives. I could see that there was some wobble in the transfer cleaning part of the MPT drive pack, but that was only half the problem.

    The transfer belt assembly was not holding snug against the drive pack because the bronze bushings at the belt assy rear were worn out in the bore. Since I didn't have any replacements with me, I swapped the bronze bushings from the front of the belt assy (like new) with the worn counterparts on the rear. Then the chattering was gone.

    The machine has 1M prints. I haven't had to disassemble the transfer belt cleaning unit before. Even though the drive was disengaging there was no excess buildup of toner in the cleaning unit or the auger unit in the front. And it's surprisingly difficult to turn considering that there are just two rollers and an auger in there. Most of the drag comes from the bunny brush. =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=
    Tags: None
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22942
      #2
      Re: Saturn gear noise-Strange one

      Follow up, if anybody following along:

      The noise cane back immediately after the PM. It's not very complicated, just a drive gear sticking out of a drive pack driving the gear on the transfer belt cleaning unit. After close examination I found a worn area in the rear transfer rail where that bronze bushing rides, and keeps the spacing to the drive pack. It's kind of odd because the bronze bushing only rotates when the transfer belt assy is being manually inserted, rolled in on the rails. The rest of the time it's stationary. The only reasonable explanation is excessive vibration from the gear drive and/or heat affected the rear rail. As a temporary measure I added a few shims between the bushing and the shaft to re-orient the bushing further into the rail. It bought me 6 weeks of quiet.

      Today I returned with the rear transfer rail and the little mylar for the sensor wiring. Have you ever changed one of these? What fun! I've been into the main drive several times. Beyond that, the fuser drive assy must come off, and the belt sensor assy loosened and shifted to the front. With the nearly new MP drive assy out I noticed the white plastic bushings were pretty badly ovalled out. Now they're bronze. We'll see how that lasts.

      To my surprise it all worked when it booted up. After 5 1/2 hours I was amazed that everything got reconnected correctly. =^..^=
      If you'd like a serious answer to your request:
      1) demonstrate that you've read the manual
      2) demonstrate that you made some attempt to fix it.
      3) if you're going to ask about jams include the jam code.
      4) if you're going to ask about an error code include the error code.
      5) You are the person onsite. Only you can make observations.

      blackcat: Master Of The Obvious =^..^=

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