Kitagawa actuator dissambely
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  1. #1
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    Default Kitagawa actuator dissambely

    Hi
    im hoping someone can help, as the title suggests i have a kitagawa actuator s1875 that is leaking oil down the tube at a fairly significant rate. im having problems getting the back ring off. It appears that it just unscrews, but maybe im missing something? The first ring i was able to get out ok, as that was just held in with an oring. This came off a Mazak QT18.

    kit1.jpg20181118_074140-1-.jpg

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    Try removing the fittings from the assembly, they are probably holding it together. Are your bearings bad? That is the section the bearings are located. You do not need to take that apart unless you plan to change the bearings. Put those small bolts back in. You need to remove the piston only, a simple job. Don't make it harder.
    Last edited by Other Brother; 11-18-2018 at 11:52 AM.

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    Post photos of all the parts you have taken off. Once those fittings are removed use gravity and a block of wood. Suction, oil and o-rings are holding it together. You will know when you are making progress because you will have oil everywhere.

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    Default Kitagawa Disassembly

    For those who want to fix their hydraulic leak themselves, this pdf will help. Most of these cylinders are assembled the same way, Kitagawa, Samchully, Tonfou, Auto Strong ect.

    The fan cover usually covers the cylinder cap bolts, remove these bolts and the cap, then the piston and shaft comes out. It's a messy job but relatively simple.

    Or if you prefer to do a complete rebuild this pdf should help. I have rebuilt these on a lot of different machines for the price of a few o-rings, where the manufacturer want $12K to rebuild colet closers etc. The Hardinge lathes has a left handed thread if my memory is correct, but nothing too complicated.

    Actuator disassembly

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    Quote Originally Posted by Other Brother View Post
    For those who want to fix their hydraulic leak themselves, this pdf will help. Most of these cylinders are assembled the same way, Kitagawa, Samchully, Tonfou, Auto Strong ect.

    The fan cover usually covers the cylinder cap bolts, remove these bolts and the cap, then the piston and shaft comes out. It's a messy job but relatively simple.

    Or if you prefer to do a complete rebuild this pdf should help. I have rebuilt these on a lot of different machines for the price of a few o-rings, where the manufacturer want $12K to rebuild colet closers etc. The Hardinge lathes has a left handed thread if my memory is correct, but nothing too complicated.

    Actuator disassembly
    >The fan cover usually covers the cylinder cap bolts,
    i have is separated about 1" by using a piece of wood, are the cap bolts circled the ones you are referring to?

    below are all the pieces i have taken off.
    20181118_122847.jpgkit.jpg
    Attached Thumbnails Attached Thumbnails kit1.jpg  

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    No, not the ones circled. The bolts are labeled #06 in the PDF, right next to o-ring #14. They go into the piston housing. You might need a stubby hex wrench.

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    Quote Originally Posted by Other Brother View Post
    For those who want to fix their hydraulic leak themselves, this pdf will help. Most of these cylinders are assembled the same way, Kitagawa, Samchully, Tonfou, Auto Strong ect.

    The fan cover usually covers the cylinder cap bolts, remove these bolts and the cap, then the piston and shaft comes out. It's a messy job but relatively simple.

    Or if you prefer to do a complete rebuild this pdf should help. I have rebuilt these on a lot of different machines for the price of a few o-rings, where the manufacturer want $12K to rebuild colet closers etc. The Hardinge lathes has a left handed thread if my memory is correct, but nothing too complicated.

    Actuator disassembly
    Hi, could you please forward your pdf to [email protected], I have a leaky kitagawa cylinder to go at next week. (can't get onedrive to open)
    Thanks...


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