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  1. #1
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    c450 fusers going bad. Could it be a gear?

    I had a fuser unit in a KM c450. The stripping fingers on top of the fusing roller were gouging the roller. It was near its life limit; so I replaced it with a 'used' fuser (bad idea) It worked for only a few impressions when these stripper fingers began to gouge the fuser roller. Now I am going to replace this one with a new fusing unit, but want to be sure that this new one does not get gouged as well. Could I be dealing with a worn gear? What else could it be?
    Thanks

  2. #2
    RTFM!! 5,000+ Posts allan's Avatar
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    Re: c450 fusers going bad. Could it be a gear?

    Is it making a noise? Wait for the machine to be cool. Check the gears. But there is not really suposed to be any source outside of the fusser that would cause the pawls to scratch.

    So if the machine is not making a noise and if the gears aint loose stick the new one in.

  3. #3
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
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    Re: c450 fusers going bad. Could it be a gear?

    some kind of aftermarket toner in use destroying the fuser ?

  4. #4
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    Re: c450 fusers going bad. Could it be a gear?

    Quote Originally Posted by allan View Post
    Is it making a noise? Wait for the machine to be cool. Check the gears. But there is not really suposed to be any source outside of the fusser that would cause the pawls to scratch.

    So if the machine is not making a noise and if the gears aint loose stick the new one in.
    Thank you for the info. Every now and then there is a slight noise. I have not tracked it down, but will today. Does the fuser roller swell as it ages?

  5. #5
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    Re: c450 fusers going bad. Could it be a gear?

    Quote Originally Posted by EarthKmTech View Post
    some kind of aftermarket toner in use destroying the fuser ?
    I pretty sure I buy oem toner, but I will check that out. Thanks

  6. #6
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
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    Re: c450 fusers going bad. Could it be a gear?

    c450 is a belt fuser, on the other side the pressure roller clear coat blisters, wrinkles and peels off due to minutes accumulated while hot regardless of pages printed before total destruction. Never seem them swell.

  7. #7
    Master Of The Obvious 10,000+ Posts
    c450 fusers going bad. Could it be a gear?

    blackcat4866's Avatar
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    Re: c450 fusers going bad. Could it be a gear?

    Do you have an adequate lead edge void (3mm or more)? Does your enduser do heavy fill images?

    Lack of leading edge void can cause more accordian jams in the fuser claws. Many multiple prints of heavy fill images can also can also cause more accordian jams at the fuser claws. Accordian jams in the fuser are the usual cause of heat belt gouging. You can adjust the leading edge void, but there is not a lot you can do about the heavy fill originals, except making shorter runs and alternating images with lighter fill. =^..^=
    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 =^..^=

  8. #8
    Step aside, noob 1,000+ Posts EarthKmTech's Avatar
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    Re: c450 fusers going bad. Could it be a gear?

    Quote Originally Posted by blackcat4866 View Post
    Do you have an adequate lead edge void (3mm or more)? Does your enduser do heavy fill images?

    Lack of leading edge void can cause more accordian jams in the fuser claws. Many multiple prints of heavy fill images can also can also cause more accordian jams at the fuser claws. Accordian jams in the fuser are the usual cause of heat belt gouging. You can adjust the leading edge void, but there is not a lot you can do about the heavy fill originals, except making shorter runs and alternating images with lighter fill. =^..^=

    This man knows exactly what he's talking about (hope really not a woman, i dont know)

    I saw this recently on a 654 series, it still happens to this day and thought, gee, I havent seen this in YEARS since i used to work on HP laserjets in the 90s.

  9. #9
    Master Of The Obvious 10,000+ Posts
    c450 fusers going bad. Could it be a gear?

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    Re: c450 fusers going bad. Could it be a gear?

    Quote Originally Posted by EarthKmTech View Post
    ... (hope really not a woman, i dont know) ...
    Most stick with "cat", but yes I am a man last time I checked. =^..^=
    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 =^..^=

  10. #10
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    Re: c450 fusers going bad. Could it be a gear?

    Quote Originally Posted by blackcat4866 View Post
    Do you have an adequate lead edge void (3mm or more)? Does your enduser do heavy fill images?

    Lack of leading edge void can cause more accordian jams in the fuser claws. Many multiple prints of heavy fill images can also can also cause more accordian jams at the fuser claws. Accordian jams in the fuser are the usual cause of heat belt gouging. You can adjust the leading edge void, but there is not a lot you can do about the heavy fill originals, except making shorter runs and alternating images with lighter fill. =^..^=
    Thanks. There have been few accordian jams - none since I installed this newer 'used' fusder.

    This machine runs mostly b&w, 12 x 18, 24# through the bypass. What I did notice is that when there is a jam about a 1/3 of the sheet is through the fuser. To remove the sheet, it is being pulled down (opposite the normal direction) You can hear the gears jump. Could the sheet be being removed wrong?

    I did tear the machine down to the gear assembly and it all looks good from what I can tell.

    Any help is really appreciated.
    Thanks

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