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Old 07-23-2019, 08:16 PM
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Issues With Cocking - Converted 3-Screw



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A family member handed me a converted three screw model to work on. The problem is intermittent. When it acts up it's only when the cylinder is installed. You can't pull the hammer past half cock. When the cylinder is removed there are ZERO issues cocking it.

The plunger that pushes the transfer bar is working just fine. When it's cocked the transfer bar is correctly pushed back and you can feel the spring tension.

Does the RFC braintrust have any theories what is going on?

Last edited by Nail Gun11; 07-23-2019 at 08:22 PM.
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Old 07-23-2019, 09:50 PM
Pete44ru
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That issue is usually due to the plunger in the rear end of the cylinder pin hanging up; but it could also be an issue with the cylinder locking bolt and/or it's spring.

A small floater in there may be causing an intermittent issue.

Put the cylinder pin in w/o the cylinder and watch the action while cocking it.

Try if you can see what may be binding up.

Ensure that the locking bolt is moving down to release the cylinder as it should.


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Last edited by Pete44ru; 07-23-2019 at 09:53 PM.
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Old 07-24-2019, 03:12 PM
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With the cylinder removed but the cylinder pin installed everything works just fine. The plunger pushes the transfer bar back, the locking bolt goes up and down and the pawl comes out and up.

Could this be a bad timing issue where the locking bolt and pawl are out of sync and fighting against each other?
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  #4  
Old 07-26-2019, 12:14 AM
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this is exactly why i did not convert my early three screw as well as i like them as originally made , if you need a transfer bar to feel safe buy a newer one in my humble opinion , no intent to inflame intended , just remembering when someone told me to send mine in for the fix
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