Hardinge HLV_H Brake, spring?
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  1. #1
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    Default Hardinge HLV_H Brake, spring?

    Hi,
    I have got myself an old KL1 (HLV H).
    The brake was disconnected and disengaged.
    Now the solenoid seems to work but are buzzing a lot.
    But if the solenoid pulls the lever to disengage the brake then it should have a spring that applies the brake?
    My brake has no spring anywhere it's just "loose".
    Where is the spring supposed to be mounted?

    BR
    Patrick

  2. #2
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    The spring it trapped between the lever and the coil cover box. There should be a raised boss on the lever lust behind the solenoid. the spring presses on to the boss.

    The spring is about 25 diameter 30-40 long with wire about 2 to 2.5 diameter. Not super strong .

    Check the solenoid closely for cracks in the copper shorts . This is the main reason for the buzzing.

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  4. #3
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    Thank's Bill!
    Ok, I will start looking into the solenoid and what spring force I might need.

    BR
    Patrick

  5. #4
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    Default Brake spring

    I had the same problem. I purchased at outrageous cost a replacement spring from Hardinge because I had no idea of the size needed.

    Here are some pictures (if they work!):

    Attachment 323842
    Attachment 323843

    I repaired the solenoid following Bill Todd's advice - fitting two new copper loops. This almost eliminated the noise and vibration. I filed things down a bit t give better contact, maybe I should have done more.
    Attached Thumbnails Attached Thumbnails dsc02379.jpg   brake-spring.jpg  

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