Lp50 problems

[Kbarth]

Hello,
I bought a used lp50 and the magazines will fire the first round and then not cock for the next round. It will do this or double and fire 2 rounds and not recock. What can i do to fix this?

[KH250]

Mine started intermittently doing this. If screw 70 in the parts diagram is screwed in to far it will not re-cock. My LP50 had slowed down a bit and I tried to recover the speed by adjusting screw 70, it stoped re-cocking completely until I backed off the screw.

[Kbarth]

Looks like 70 is an oring from what I see. I assume you mean 68 or 69? If so how far are they screwed out?

[Kbarth]

I found the screw you were talking about. I loosened mine to where it was even with the outer screw. No improvement

[KH250]

You must have a different parts diagram. My adjusting screw is 70. Mine is slightly below flush with the outer screw. The outer screw is showing 1 turn of thread. My Steyr is a LP50hp. Air pressure drives a piston back to re-cock the pistol. The problem may be with the piston seals. If it is I think you need someone that has more expertise repairing these pistols. Sorry I could not help.

[KH250]

Maybe check the trigger is correctly adjusted. You tube video from Steyr shows how. Make sure trigger assy is tight in the frame, one bolt and grub screws. A correctly adjusted trigger has a short first stage and a small amount of smooth creep on the second stage. I have adjusted mine following the video.
https://www.youtube.com/watch?v=lT8h3_2eCrc

[Kbarth]

Hello,
I found that the 2mm allen screw on the left side of the frame was loose. Tightened up and works perfect. Would that be because the assembly was loose?

[KH250]

The grub screws have a tapered tip, a small amount of looseness will result in a significantly out of position trigger. They are the primary locating device for the trigger. Its my theory and I am sticking to it. Hopefully the pistol continues to work well for you.