M3550 Knocking sound ?

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  • tech07
    Trusted Tech

    250+ Posts
    • Aug 2008
    • 405
    #1

    M3550 Knocking sound ?

    Have a M3550 with a knocking sound. Not real loud, but don't trust it. Has almost new pm kit. And new dev. and reg. clutches. Runnng fine but knocking.
    Not the fuser. Hard to pinpoint source. Drum, fuser, developer less than 10K. This machine runs 75k a month. This knocking noise has me frustated. ?????
    Tags: drum, fuser, knocking, m3550, sound
    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22699
      #2
      Re: M3550 Knocking sound ?

      Paper tray lift gear post broken? =^..^=
      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 =^..^=

        Comment

        • darry1322
          Senior Tech

          Site Contributor
          500+ Posts
          • Oct 2010
          • 817
          #3
          Re: M3550 Knocking sound ?

          I did see one machine ( can't remember if it was an M3550 but it was similar) that wouldn't knock during pre-drive if the drum or developer or toner wasn't in the machine. If you just left the toner out with everything else in place, it wouldn't knock during pre-drive. Put the toner in and the knock during pre-drive would be back.

          Turned out to be the fuser. Apparently the fuser pressure doesn't engage until every component is detected. The knock was only present when the fuser pressure was engaged.

            Comment

            • zoraldinho
              teacher-guide-expert-guru

              Site Contributor
              2,500+ Posts
              • Mar 2008
              • 4955
              #4
              Re: M3550 Knocking sound ?

              slow knocking=Paper tray lift gear post broken
              fast               knocking =registration gear
              Practice makes perfect
              If it ain't broke, don't fix it
              A picture is worth a thousand words
              If you want something done right, you have to do it yourself

                Comment

                • tech07
                  Trusted Tech

                  250+ Posts
                  • Aug 2008
                  • 405
                  #5
                  Re: M3550 Knocking sound ?

                  Thanks guys. Definitely not tray lift. Changed way too many of those.
                  Registration gear sounds interesting

                    Comment

                    • zoraldinho
                      teacher-guide-expert-guru

                      Site Contributor
                      2,500+ Posts
                      • Mar 2008
                      • 4955
                      #6
                      Re: M3550 Knocking sound ?

                      302LV24160 - Gear Z19R-Z22R RGIST UP
                      302LV24150 - Gear Z22L REGIST LOW


                      gear.jpg
                      Practice makes perfect
                      If it ain't broke, don't fix it
                      A picture is worth a thousand words
                      If you want something done right, you have to do it yourself

                        Comment

                        • tech07
                          Trusted Tech

                          250+ Posts
                          • Aug 2008
                          • 405
                          #7
                          Re: M3550 Knocking sound ?

                          Could not locate 302LV24150 and 160 in the M3550 parts list.

                            Comment

                            • tech07
                              Trusted Tech

                              250+ Posts
                              • Aug 2008
                              • 405
                              #8
                              Re: M3550 Knocking sound ?

                              Part not in parts manual but found it in service bulliten...Thanks !

                                Comment

                                • zoraldinho
                                  teacher-guide-expert-guru

                                  Site Contributor
                                  2,500+ Posts
                                  • Mar 2008
                                  • 4955
                                  #9
                                  Re: M3550 Knocking sound ?

                                  Any time.
                                  Practice makes perfect
                                  If it ain't broke, don't fix it
                                  A picture is worth a thousand words
                                  If you want something done right, you have to do it yourself

                                    Comment

                                    • tech07
                                      Trusted Tech

                                      250+ Posts
                                      • Aug 2008
                                      • 405
                                      #10
                                      Re: M3550 Knocking sound ?

                                      Solution was found in Drum assembly component of new PM kit ( 10k ). Turning too tight causing spring loaded drum coupling ratchet gear to slip and make noise. Thanks for input.( Will pay attention to reg. gears going forward also.)

                                        Comment

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