It's too doggone hot outside, so I holed up in the basement to clean the 572. Got it all squeeky clean and lubed, and put back together...but the trigger does not accuate the sear. It has it's normal travel, gives a mild click, but does not drop the hammer. With the entire trigger group removed, it functions normally. I've tried installation with hammer cocked (and un-cocked..not recommended), and with safety on and off, and various angles. Anybody been there before? I was looking forward to some CB plinkin'...but now I'm busted
Well, the answer is...the slide release has a tail piece that trips the disconnector. When reassembled, the slide release is being depressed by contact with the action bar. Just a few thousandths too much, is enough to disconnect the trigger. (talk about a hair-trigger disconnector...just look at it hard and it shuts down!)
Solution seems to be carefully removing material at the contact points at both ends of the slide release. That re-established the free play needed at the disconnector end. I'm only talking about less than a hundredth of an inch here...when the action is opened, the tail piece swings that thing away like a barn door...so there's no loss of functionality.
The wonder to me is how it worked when it was so dirty and gummy in there!