Hammer not staying cocked

Thedub808 · August 20, 2020, 10:26 AM

Hi guys. I just put in a lighter power hammer and rebound spring in a s&w model 60 and now the hammer wont stay back when I thumb it back. It worked before. It works fine double action. Any ideas?

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10-96 · August 20, 2020, 08:37 PM

It's hard to tell without looking at it. But, sometimes lighter weight springs are longer than the stock springs. Is your one of your new springs compressing and... (I think the term is "stacking up"?) and running out of room to compress any further?

Also, if anyone has filed an angle on the sear notch on the hammer or got silly with the trigger, there may not be enough pressure on the engagement to prevent the contact points from sliding off of each other.

**44 AMP** · August 20, 2020, 09:13 PM

There are only two possibilites. The new parts you put in won't allow it to work like it did before, or your reassembly isn't correct.

Put the original parts back in and see if it works. If it works, the problem is the new parts. If it doesn't, the problem is you are doing something wrong putting it together.

Thedub808 · August 21, 2020, 11:38 AM

Quote:

Originally Posted by 10-96

It's hard to tell without looking at it. But, sometimes lighter weight springs are longer than the stock springs. Is your one of your new springs compressing and... (I think the term is "stacking up"?) and running out of room to compress any further?

Also, if anyone has filed an angle on the sear notch on the hammer or got silly with the trigger, there may not be enough pressure on the engagement to prevent the contact points from sliding off of each other.

This was the problem. Hammer spring was too long preventing the hammer from locking. Thanks!

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10-96 · August 21, 2020, 12:50 PM

Thedub808, Was your spring kit from Wolff by chance? I'm curious who's kits are running ok these days. Wolff has always done a great job in the past for me.

Oh, and I'm glad you got the problem ID'd. That's like 3/4 of the headache, right?

And, Welcome aboard! Glad to have you amongst us. Stick around.

August 20, 2020, 10:26 AM	#1
Thedub808 Junior Member Join Date: August 20, 2020 Posts: 2	Hammer not staying cocked Hi guys. I just put in a lighter power hammer and rebound spring in a s&w model 60 and now the hammer wont stay back when I thumb it back. It worked before. It works fine double action. Any ideas? Sent from my SM-G960U using Tapatalk

August 20, 2020, 08:37 PM	#2
10-96 Senior Member Join Date: October 19, 2005 Location: Tx Panhandle Territory Posts: 4,159	It's hard to tell without looking at it. But, sometimes lighter weight springs are longer than the stock springs. Is your one of your new springs compressing and... (I think the term is "stacking up"?) and running out of room to compress any further? Also, if anyone has filed an angle on the sear notch on the hammer or got silly with the trigger, there may not be enough pressure on the engagement to prevent the contact points from sliding off of each other. __________________ Rednecks... Keeping the woods critter-free since March 2, 1836. (TX Independence Day) I suspect a thing or two... because I've seen a thing or two.

August 20, 2020, 09:13 PM	#3
44 AMP Staff Join Date: March 11, 2006 Location: Upper US Posts: 28,803	There are only two possibilites. The new parts you put in won't allow it to work like it did before, or your reassembly isn't correct. Put the original parts back in and see if it works. If it works, the problem is the new parts. If it doesn't, the problem is you are doing something wrong putting it together. __________________ All else being equal (and it almost never is) bigger bullets tend to work better.

August 21, 2020, 12:50 PM	#5
10-96 Senior Member Join Date: October 19, 2005 Location: Tx Panhandle Territory Posts: 4,159	Thedub808, Was your spring kit from Wolff by chance? I'm curious who's kits are running ok these days. Wolff has always done a great job in the past for me. Oh, and I'm glad you got the problem ID'd. That's like 3/4 of the headache, right? And, Welcome aboard! Glad to have you amongst us. Stick around. __________________ Rednecks... Keeping the woods critter-free since March 2, 1836. (TX Independence Day) I suspect a thing or two... because I've seen a thing or two.

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