Author Topic: DA is dead in my 75 Compact  (Read 136 times)

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Offline briang2ad

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DA is dead in my 75 Compact
« on: March 18, 2023, 06:38:19 PM »
Years ago I took my 75B compact apart and polished up the trigger bar nicely per instructions here. 

The DA would not reliably work - you'd reach a point at the rear and sometimes the hammer would not release.  Annoying.  So... recently I replaced the TB with a new one thinking maybe I polished a little too much and its worse.  I tweaked the tension on the TBS and even replaced the TB spring with a new one, and still cannot make it complete a DA cycle - ever.  Worse and worse. 

The TBS seems to have plenty of tension and it rides in the grooves nicely and I made sure it is not off center in the frame hole.

Any tips?  Thanks. 

Offline tdogg

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Re: DA is dead in my 75 Compact
« Reply #1 on: March 19, 2023, 01:38:12 AM »
So is it still not completing the DA cycle or is it doing something different with the new triggerbar? 

When it doesn't release in DA, does the hammer spring force the trigger forward to the resting position for DA?  Does it drop to half cock?  Does it revert to SA (does the hammer stay cocked)?

Did you touch the Disconnector at all during your polishing?

How much material did you remove when polishing?  You must have been fairly agressive as it altered the timing.  A little goes a long way in smithin, the surfaces don't need to be mirror.

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