1949 Cincinnati No.3 High Power 4J3P1V need help.
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  1. #1
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    Default 1949 Cincinnati No.3 High Power 4J3P1V need help.

    I recently came across a Cincinnati No.3 that needs some major repair. Machine is not feeding due to a jammed hydraulic drive shaft. I'm having trouble looking for the correct manual and so far all the manuals that I have found has a different overarm compared to mine (see attached pictures). If someone can point me to the correct manual I would be grateful. Also I found two disconnected pipe fittings on the underside of the knee in feedbox compartment, as shown in the attached pictures. Anyone has any idea what these are for?
    Attached Thumbnails Attached Thumbnails photo_2020-10-18_00-24-42.jpg   photo_2020-10-18_00-24-43.jpg   photo_2020-10-18_00-24-44.jpg   photo_2020-10-18_00-24-41.jpg   photo_2020-10-18_00-24-39.jpg  


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  3. #2
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    More pictures...
    photo_2020-10-18_00-24-45.jpg
    photo_2020-10-18_00-24-46.jpg
    photo_2020-10-18_00-24-47.jpg
    photo_2020-10-18_00-24-49.jpg

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    I think the powered overarm is something of an accessory. It would have its own manual. This one may help for overarm:

    http://vintagemachinery.org/pubs/2097/15295.pdf

    While the parts and service manual are combined here, for #2, #3, and #4 dial type:

    http://vintagemachinery.org/pubs/2097/22565.pdf

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    If you look on the first real page of the manual (the one after GS10) you will see it applies only to 2A and 4A serials

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    Quote Originally Posted by johnoder View Post
    If you look on the first real page of the manual (the one after GS10) you will see it applies only to 2A and 4A serials
    Good eye, good eye !

    Here's a service and parts manual for 3J and 4J on ebay, 191 pages:
    Cincinnati Milling Machine # 3, 4, 5, & 6 Mod OD Service and Parts List Manual | eBay

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    Wow that's a good find on that over arm. Unfortunately the owner replaced the geartrain removed with an inverter.
    The 4J manual on Ebay is a hard hardcopy version though, is there a purchasable soft copy somewhere though?
    On another note, does anyone know what's the HP on the rear bottom motor that drives the main pulley? I've read on this forum it could be anywhere from 20-50HP. That's a monster of a machine if that's true. Also can anyone confirm if the main hydraulic shaft is supposed to turn on motor start up?

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    Quote Originally Posted by newcomer View Post
    I've read on this forum it could be anywhere from 20-50HP.
    A No 2 is like 7.5 to 10hp. I was thinking a No 3 would be 10 to 15hp.

    Looking at these 3 brochures, there are No 3's with 10, 15, and 20hp.

    10hp:
    http://vintagemachinery.org/pubs/2097/16338.pdf

    15hp:
    http://vintagemachinery.org/pubs/2097/16339.pdf

    20hp:
    http://vintagemachinery.org/pubs/2097/16344.pdf

    If the external power rating data plate is missing, maybe the motor has a data plate.


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