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  #1  
Old 02-07-2020, 04:28 PM
STM1911 STM1911 is offline
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Hammer not engaging the sear

I just replaced the mainspring housing in my 1911, everything went back together just fine and the sear spring is flat and the in the notch in the frame. As far as I can tell the hammer strut is firmly seated and centered in the top mainspring retainer cap. However, when I pull back the hammer, it is not engaging the sear and will not lock in the cocked position.

Any ideas?
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  #2  
Old 02-07-2020, 07:26 PM
BBBBill BBBBill is offline
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If nothing else was changed maybe this - Possible interference between the grip safety and mainspring housing, causing the grip safety to bind not fully depressed, which won't allow enough room for the hammer spur. Look for contact between the two where they meet.
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  #3  
Old 02-07-2020, 07:38 PM
log man log man is offline
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Is this a Springfield?

LOG
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  #4  
Old 02-07-2020, 07:55 PM
megafiddle megafiddle is online now
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Does the hammer have enough travel to allow you to pull the slide back?

If not, some difference in the new housing or its components is not allowing enough travel.

If the slide can be pulled back, something is interfering with the movement of the sear.

-
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  #5  
Old 02-07-2020, 08:26 PM
log man log man is offline
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If it was an SA and the internals were used, ie if the mainspring cap is used with a std. mainspring then there will not be enough travel for the hammer to cock.

LOG
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  #6  
Old 02-07-2020, 09:18 PM
jjfitch jjfitch is offline
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Are you sure the left sear spring leaf isn't under the sear?

Pretty common error in reassembly.

It doesn't take much for it to slip out of proper position while the MSH is replaced.

Smiles,
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Last edited by jjfitch; 02-07-2020 at 09:21 PM.
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  #7  
Old 02-07-2020, 10:07 PM
markm markm is offline
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Quote:
Originally Posted by jjfitch View Post
Are you sure the left sear spring leaf isn't under the sear?

Pretty common error in reassembly.

It doesn't take much for it to slip out of proper position while the MSH is replaced.

Smiles,
This would be my guess, it's difficult to get it into place without laying it down with the grip safety off.
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  #8  
Old 02-08-2020, 05:37 PM
ken_mays ken_mays is offline
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Sear spring fingers correct placement
Attached Thumbnails
searspring4.jpg  
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  #9  
Old 02-08-2020, 06:54 PM
jjfitch jjfitch is offline
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Trigger locked up!

Quote:
Originally Posted by ken_mays View Post
Sear spring fingers correct placement
I have also seen triggers locked up because the left sear leg was jammed between the sear and the grip frame. This was also just after disassembly and reassembly.

It seems that the sear wants to roll to the left during assembly as the MSH is inserted. Just a thought.
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  #10  
Old 02-10-2020, 10:45 PM
Peter1911 Peter1911 is offline
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Quote:
Originally Posted by markm View Post
This would be my guess, it's difficult to get it into place without laying it down with the grip safety off.
Yep! My first two tries at detail stripping a M1911 and a M1911A1 resulted in the hammer not locking back. A quick YouTube search and a careful reading of the Army instructions that came with my CMP 1911A1 taught me that fitting the sear spring BEFORE installing the grip safety helped me to install the sear spring correctly.
When I had the sear spring installed correctly, I slid the Main Spring Housing in far enough to hold the sear spring in place, then installed the grip safety. Function tests were all perfect.
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  #11  
Old 02-14-2020, 07:08 AM
Don_P Don_P is offline
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Quote:
Originally Posted by STM1911 View Post
I just replaced the mainspring housing in my 1911, everything went back together just fine and the sear spring is flat and the in the notch in the frame. As far as I can tell the hammer strut is firmly seated and centered in the top mainspring retainer cap. However, when I pull back the hammer, it is not engaging the sear and will not lock in the cocked position.

Any ideas?
Why did you replace the MSH? ..... and does the gun function properly when you re-install the original?
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  #12  
Old 02-14-2020, 10:29 AM
Autonomous Autonomous is online now
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His post is a bit ambiguous. Replaced as in put it back on or put a different one on?
If different then the ILS specter looms as log man pointed out.
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  #13  
Old 02-25-2020, 05:42 PM
mickeyd mickeyd is offline
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Any follow up from the OP to this issue?
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  #14  
Old 02-26-2020, 07:10 AM
Jolly Rogers Jolly Rogers is online now
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Nope! Only one post ever.
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  #15  
Old 02-26-2020, 08:34 AM
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RetiredRod RetiredRod is offline
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Nope! Only one post ever.
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19 days and no follow up. Why does someone join a forum to ask a specific question and then never check back?
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  #16  
Old 02-26-2020, 10:08 AM
stevemaury stevemaury is offline
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Maybe he died. It happens.
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Old 02-26-2020, 05:44 PM
mickeyd mickeyd is offline
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maybe he died. It happens.
rip stm1911
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