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  1. #1
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    Riso MZ790 Master Disposal Belt Replacement

    unwork_inc's Avatar
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    Riso MZ790 Master Disposal Belt Replacement

    Could anyone please shed some light into how to replace the master disposal belts on a Riso MZ790UI?

    I have two versions of the MZ790 technical manual (rev 0.9 and rev 0.91), and they both seem to be missing the chapters that refer to the master disposal section (chapters 11-13).
    I also have the manual for the RZ line, which does include the master disposal section, but it has a different internal setup than the MZ so it doesn't help either.

    After removing the front cover and master disposal box, I can see both rods that hold the belts, but I'm uncertain which retaining clips and hardware to remove in order to slide in the new belts. I can also see two plastic orange levers on the master disposal box tray: one releases the tension on the lower rod, the other lifts it back into its original place, but nothing else occurs. I'm attaching pictures of the front of the machine and disposal box tray views.

    Thanks in advance
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  2. #2
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    Belgradw
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    Re: Riso MZ790 Master Disposal Belt Replacement

    Greeting. I'm sending you what I have. Is this enough?
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  3. #3
    Technician
    Riso MZ790 Master Disposal Belt Replacement

    unwork_inc's Avatar
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    Nov 2016
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    Portland, Oregon
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    Re: Riso MZ790 Master Disposal Belt Replacement

    Thank you so much - Although partially complete, these instructions do address master disposal belt replacement

    May you happen to know how to gain access to a complete service manual? I've just acquired a third one and it's also incomplete. They are all missing Chapters 6-10, and 11-13. If the total page count on the manual is short of 170-180 it's most likely incomplete.

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