Pedersoli pistol mainspring

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  • Last Post 3 weeks ago
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delmarskid posted this 3 weeks ago

I picked up a Pedersoli Kentucky Pistol today. It was unfired . It was cheap so why not? I can’t really live with the trigger the way it is and want to tear down the lock to do what we do. I can’t figure out how to get the mainspring out. Any suggestions?

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Boschloper posted this 3 weeks ago

Remove the lock and take a picture of the back side. There are several lock designs, each with its own disassembly. A picture is worth a thousand words. 

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delmarskid posted this 3 weeks ago

I can try but this apple phone…

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RicinYakima posted this 3 weeks ago

You have to have a tower computer. 

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Aaron posted this 3 weeks ago

A spring clamp or vise grips will work.

With rifle in hand, I confidently go forth into the darkness.

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delmarskid posted this 3 weeks ago

I may need to fire up the laptop.

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delmarskid posted this 3 weeks ago

I know I can get it out but finding flying parts and getting it back together is the sticky part.

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rhbrink posted this 3 weeks ago

If it's traditional lock with the "V" type main spring it should be easy. Pull the hammer all the way back to full cock, the main spring should be fully compressed. The best thing to use is a main spring vice but you probably don't have one. A pair of vice grips will work OK, compress the main spring a little more this should release the tension on the hammer and then you can lift the main spring out of the lock. There is a small projection on the top of the short arm of the spring and also a pin that is made on the spring that fits into a hole in the lock plate. These two hold the main spring in place so carefully lift up and out to free them without breaking either one off the main spring. It should come out really easy but be careful and gentle, it's really a simple system once you see how it works. 

If it's a modern design with a coil spring, then that is a whole different animal. 

RB

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delmarskid posted this 3 weeks ago

It’s a different type of spring/tumbler interlock. There is no stirrup. There is an upward semicircular hook that rests on a ledge forward of the half and full notches of the tumbler. At full cock the flats of the mainspring are touching each other most of there lengths. I can get no more contraction without making a fixture to hold the side plate and then clamping the spring from below to a point above it. What I ended up doing was narrowing the mainspring by about a third, polishing the sear and side plate surfaces, and then matching the sear nose angle to the horrid hook angle of the full cock cut. The sear was pretty easy to get out. I have the trigger at about 4 pounds with a little roll but no real creep. E’ll see how it holds up. I didn’t take off much, just broke the point off really. The mainspring was so tough I needed both thumbs to pull it back.

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