[mroverkill]

There should be three screws on the outside of the trigger mechanism that can be adjusted by a very small flathead screwdriver. Two on the shooter end, one on the muzzle end. One of the two on the shooter end of the mechanism should adjust the length of the trigger pull. This same screw also adjusts the sear engagement height. The longer the trigger pull, the higher the engagement height. Fiddle with that some, I can't remember which screw offhand, but that should be enough for a start.

 

[mroverkill]

There should be two screws on the opposite side of the mech from where there is a set screw sticking out of mine. I believe the upper of the two adjusts the trigger pull length. As you adjust the trigger pull length shorter, the engagement height drops. Longer, and the height rises. This can be seen through the circle in the picture above near the receiver.

 

[mroverkill]

That's right. I'm sorry it's been a while since I've worked on my Tanaka, I forgot which one did what. I used that to fix my problem with the sears, so I suggested it. I'm glad you found something that worked for your problem though.