PM7 Bolt damage

#1 Red1022

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Posted 20 March 2013 - 09:50 PM

My PM7 is giving me hell. It started by not cycleing so i changed all the o-rings, lubed and put back in the gun. When i aired it up it was leaking around the bolt, well as far as i can tell. I removed the bolt to inspect it when i noticed the there are large groovs where the ball detents hit. These grooves are deep enought to maybe not seal properly, So my question is can the ball detents wear down the bolt this much over time or is their another problem? Any advise would be great thank.

This post has been edited by Red1022: 20 March 2013 - 09:50 PM

#2 Totes Magotes

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Posted 20 March 2013 - 11:54 PM

The PM7 has delrin detents I believe which is a type of plastic. It shouldnt be doing damage to your bolt which is made of aluminum.

Most bolt leaks are caused by the bolt sail oring. Try replacing that first. (usually 90% of the time fixes leaks from matrix series markers.)

If not you might have to remove the grip frame and make sure the solenoid seat is sealed properly or your eye wires arent being pinched.

#3 DamianE

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Posted 22 March 2013 - 12:27 PM

My stock pm7 has hard rubber detents. I find it hard to believe that those little things are gouging the aluminum to the point where the bolt totally fails. Pics would be nice.

Bly leaking "around the bolt" do you mean a leak from the bolt down the barrel? more explanation would help here

#4 Red1022

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Posted 22 March 2013 - 07:56 PM

I changed the sail o-ring, put it back in and still leaked. Yes it is leaking down the bearrel, not much but enought to effect air consumption. I put my pm5 bolt in its place and it worked perfectley. The groove is on both side in line with each other.