Hammer drop question.
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Old 06-01-2010, 11:47 PM   #1
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Default Hammer drop question.

I bought a MKIV series 70 Cogan Customized Colt in an estate deal and I haven't fired it yet, but when the slide release is pushed with the slide in the back position, the hammer will drop. It doesn't fall to the fire position, but stops about 1/8th of an inch from fire. The hammer doesn't stay cocked when the slide rams home. I'm pretty sure this is not normal and something is wrong, but since the gun has been worked on, I don't know. Any advice would be appreciated.

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Old 06-02-2010, 01:23 AM   #2
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be safe replace the hammer, sear, disconnector, thumb safety, and sear spring. they are fairly cheap parts no telling what of those the previous owner monkeyed with.

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Old 06-02-2010, 09:40 AM   #3
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Never let the slide slam forward without a round in the chamber. Such abuse is the cause of hammer follow.
You may get lucky with changing out the sear only, but to do the job correctly, change out 1 piece at a time.

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Old 06-02-2010, 12:05 PM   #4
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Thanks, Haven't torn down one in many years, but I have a Colt shop manual, it will be a fun project for this weekend.

DanFL, you must know Dink and Julie at D&D cycles??

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Old 06-02-2010, 01:05 PM   #5
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Dropping the slide on an empty chamber WILL eventually cause this problem. Most likely the sear. Replace it.

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Old 06-02-2010, 01:52 PM   #6
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If you have the slightest desire to test it at the range I might suggest only one round in the mag...

Guess what happened to me when testing my Series 70 after a trigger job? Not fun!

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Old 06-02-2010, 02:14 PM   #7
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He might have an E-Ticket ride with a full mag !!!!
More than likely an overworked sear and/or hammer. Try not to release the slide on an empty chamber, it will, in time, cause damage to the sear and hammer. Close the slide by hand when empty. Congrats on your find. Get her working right and enjoy..............................

Jim................

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Old 06-02-2010, 03:01 PM   #8
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Rather than an E-Ticket ride, might be a G-Ticket- as in Government Ride. Some of those folks are real picky about full auto fire......

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Old 06-03-2010, 10:12 PM   #9
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Quote:
Originally Posted by c3shooter View Post
Rather than an E-Ticket ride, might be a G-Ticket- as in Government Ride. Some of those folks are real picky about full auto fire......
this is no joke. guy up here in wis. milwaukee had a worn sear his rifle went auto on a range some asshat reported it to batf he spent time in prison. he was also previously investigated for non-related batf violations which led ultimately to them tossing the book at him. batf dont mess around. they already despise citizen gun ownership to begin with.
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Old 06-04-2010, 06:15 PM   #10
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Quote:
Originally Posted by Byrdguy View Post
I bought a MKIV series 70 Cogan Customized Colt in an estate deal and I haven't fired it yet, but when the slide release is pushed with the slide in the back position, the hammer will drop. It doesn't fall to the fire position, but stops about 1/8th of an inch from fire. The hammer doesn't stay cocked when the slide rams home. I'm pretty sure this is not normal and something is wrong, but since the gun has been worked on, I don't know. Any advice would be appreciated.
My advice is to call up Bob Cogan. You can get the number here :

apwcogan.com

You can talk to Bob personally, he usually will make it right if it is his problem.
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