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  1. #1
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    DUPLICATOR GR3770 DRUM

    Hello!
    I'm going to purchase a GR3770 and I'd like to know if this drum model is ok for a GR 3770:

    FR/GR COLOUR DRUM (W)

    Thanks!!

  2. #2
    General Troublemaker 250+ Posts ddude's Avatar
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    Re: DUPLICATOR GR3770 DRUM

    Should work- p/n is S2806. See below-

    Legal Machines - Inkless Cylinders for Color and black Ink
    Model Cylinder Color Cylinder Black
    All RA S-657L S-657L
    All RC S-918L S-918L
    TR1510 S-2100 S-2100
    CR1610 S-2460 S-2460
    All GR S-2763 S-2763
    FR2950 S-2763 N/A
    RN21/22/25 S-3189
    RN2000 S-3190
    A3 Machines - Inkless Cylinders for Color Ink
    Model Cylinder A3 A4 Wide (Short Drum)
    RP37xx S-3534 S-3378
    RP31xx/35xx S-3534 S-3378
    GR3770 S-2806 S-2807
    GR3750 S-2806 S-2807
    GR3710 S-2806 S-2807
    FR3950 S-2806 S-2807
    FR3950a S-2806 S-2807
    Fr3910 S-2806 S-2807
    RC6300 S-824 S-424
    A3 Machines - Inkless Cylinders for Black Ink
    Model Cylinder A3 A4 Wide (Short Drum)
    RP3700/RP3790 S-3372B S-3377
    RP310x/RP350x N/A S-3373
    GR3770 N/A S-2325
    GR3750 S-2806 S-2807
    GR3710 S-2806 S-2807
    FR3950 N/A S-2809
    FR3950a N/A S-2809
    FR3910 N/A S-2809
    RC6300 S-824 S-424
    2000 mockingbirds = 2 kilomockingbirds

  3. #3
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    Red face Re: DUPLICATOR GR3770 DRUM

    Quote Originally Posted by ddude View Post
    Should work- p/n is S2806. See below-

    Legal Machines - Inkless Cylinders for Color and black Ink
    Model Cylinder Color Cylinder Black
    All RA S-657L S-657L
    All RC S-918L S-918L
    TR1510 S-2100 S-2100
    CR1610 S-2460 S-2460
    All GR S-2763 S-2763
    FR2950 S-2763 N/A
    RN21/22/25 S-3189
    RN2000 S-3190
    A3 Machines - Inkless Cylinders for Color Ink
    Model Cylinder A3 A4 Wide (Short Drum)
    RP37xx S-3534 S-3378
    RP31xx/35xx S-3534 S-3378
    GR3770 S-2806 S-2807
    GR3750 S-2806 S-2807
    GR3710 S-2806 S-2807
    FR3950 S-2806 S-2807
    FR3950a S-2806 S-2807
    Fr3910 S-2806 S-2807
    RC6300 S-824 S-424
    A3 Machines - Inkless Cylinders for Black Ink
    Model Cylinder A3 A4 Wide (Short Drum)
    RP3700/RP3790 S-3372B S-3377
    RP310x/RP350x N/A S-3373
    GR3770 N/A S-2325
    GR3750 S-2806 S-2807
    GR3710 S-2806 S-2807
    FR3950 N/A S-2809
    FR3950a N/A S-2809
    FR3910 N/A S-2809
    RC6300 S-824 S-424
    Thanks thanks, could I share this important information on "wiki stencil web". Do you know it? stencil.wiki | A RISO wiki for artists, designers, and printers

  4. #4
    General Troublemaker 250+ Posts ddude's Avatar
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    Re: DUPLICATOR GR3770 DRUM

    Quote Originally Posted by JCABRERA View Post
    Thanks thanks, could I share this important information on "wiki stencil web". Do you know it? stencil.wiki | A RISO wiki for artists, designers, and printers

    Sure, share away.
    2000 mockingbirds = 2 kilomockingbirds

  5. #5
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    Re: DUPLICATOR GR3770 DRUM

    I'm still wondering, what part number the black drum for GR3770 has. It's different to S-2806, because it needs HD ink/master. But i am not sure, what is really different technically. And i'd like to buy one

    Also, all this searching for compatible parts/consumables brings up an idea of an overall compatibility chart for machines/drums/ink/masters. All information with names/part numbers in one chart/sheet or even a collection of charts would be great.

  6. #6
    Service Manager 10,000+ Posts
    DUPLICATOR GR3770 DRUM

    Phil B.'s Avatar
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    Re: DUPLICATOR GR3770 DRUM

    Quote Originally Posted by mwillems View Post
    I'm still wondering, what part number the black drum for GR3770 has. It's different to S-2806, because it needs HD ink/master. But i am not sure, what is really different technically. And i'd like to buy one Also, all this searching for compatible parts/consumables brings up an idea of an overall compatibility chart for machines/drums/ink/masters. All information with names/part numbers in one chart/sheet or even a collection of charts would be great.
    you sound like an end user.. not a tech.. I suggest calling a dealer in your area.. posing that question and have THEM give you the P/N's .. that way if you EVER need service tech you have their #!

  7. #7
    Field Supervisor 500+ Posts 20gaugeO/U's Avatar
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    Re: DUPLICATOR GR3770 DRUM

    You know you are talking about a machine from the mid 90's, right??? If you can find a drum it has probably been sitting in storage for years and if you can find a drum it and the machine are one part away from being a boat anchor. Which is why nobody is jumping to dig up old info on this dinosaur.

    I threw my manuals out years ago when the last one bit the dust so from memory the drum differences are probably all internal. The PCB on the drum may be different or dip switches just in different settings, should be able to look at the stamped P/N on the PCB. Then I believe the squeegee 1 way gear and belt are different to stir the HD ink at a different rate... if you have an available drum buy it cheap and play detective with it. At the very least you'd have a spare mechanical parts drum. The Black ink is the only HD ink so the color drum (S-2806) may just need a dip switch change on the board or swap the entire board (4 screws and maybe 3 small connectors). The catch would be the rib that runs down the side of the ink tube that triggers the actuator switch... is it in the same spot??? Idk and have spent more time on this than I should... good luck

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