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Crashed a Clausing Lathe....Broken....what broke???

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Was threading on a buddys Clausing lathe Model #5914 (circa 1960/70's)

I got to my releif and tried to disengage the lever, but it hesitated, and the blade dug into my work-piece while I threw the lever again to disenge the lathe.

The aftermath was that the tooling never got near the 3-jaw, the tooling dug into my work piece before I could get it shut down.

The only damage to the machine, is now when you throw the 'stop' lever that used to stop the turning of the 4-jaw....now when you throw the brake lever, it disengages everything, but the 4-jaw doesn't immediately stop, like it once did.
Now the 4-jaw spins itself to a slow stop, after the brake has been thrown. You can grab the disengaged 4-jaw and stop it with your hand, but before the crash, the 4-jaw would instantly stop when you threw the brake lever.

I have never disassembled the lathe, or any other, but i have a feeling I sheared some kind of pin off inside it. Everything else works correctly.

I offered to pay for someone to come out and repair it, so the 4-jaw immediately stops again, when you throw the brake.
My freind says "no repair!" ..... He wants me to buy him a NEW lathe.
This is ridiculous.
Can someoen please tell me what broke inside the lathe? If it is easy, I will replace broken pin/part and be done w/ him.
He will not allow me to bring in a tech to fix, as he wants a new lathe, bought by me. If a mechanical layman can fix it, I can fix it when he is at lunch....and then tell him "It's Fixxed!!!" lol

Anything/parts I should be looking for that woould be broken to cause the head to spin itself to a stop instead of stopping when throwing the lever.

Thank you
Matt

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