Tschudin HTG-400 Problem
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  1. #1
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    Default Tschudin HTG-400 Problem

    We have an 1964 Tshudin HTG-400 universal cylindrical grinder.

    At the end of the auto cycle the main control lever does not trip to end the cycle and retract the wheel head.

    I'm thinking that the sparkout timer control my be shot, any one ever dealt with this?

    What was the fix?

    Thanks

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    Quote Originally Posted by chip_maker View Post
    We have an 1964 Tshudin HTG-400 universal cylindrical grinder.

    At the end of the auto cycle the main control lever does not trip to end the cycle and retract the wheel head.

    I'm thinking that the sparkout timer control my be shot, any one ever dealt with this?

    What was the fix?

    Thanks
    Hi there,

    Have you managed to fix the issue that you experienced? I have the exact same issue and I am looking for the solution...

  3. #3
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    Quote Originally Posted by Kobusvn View Post
    Hi there,

    Have you managed to fix the issue that you experienced? I have the exact same issue and I am looking for the solution...
    Yes I did.

    The problem on my machine turned out to be a gummed up and stuck hydraulic solenoid.

    If you're in the back of the machine it's located under the cover on the upper right hand side.

    I just took it apart and found that the spool was stuck. Once I cleaned it so it slid in and out freely all was good.

    The spool is in the grey part under the electromagnet.

    Also make sure that you attach the solenoid the same way it came off of the steel plate. If I were you I would mark the plate and spool housing so you can put it on with the correct orientation.

    Good luck!
    Attached Thumbnails Attached Thumbnails 193488807_10222997406156100_7349280310469286601_n.jpg   194070636_10222997406436107_188473953460706424_n.jpg  
    Last edited by chip_maker; 06-01-2021 at 08:08 AM. Reason: added photos

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  5. #4
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    I have a 410 and the exact same thing happened to me. Turns out it was a blown 6.3a fuse under the bridge rectifier. Replaced
    fuse and everything's fine. Good Luck!

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    Any chance you might have a manual for this machine?
    I recently purchased a Tschudin and am looking for a manual.

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    Thanks, I will have a look!


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