Hey guys,
As some of you may know I have been having some issues getting the LX tuned to where it won't leak on my RT Classic...
Along the way I have run into some other issues that need to be resolved before I try again on the LX...
Took the gun to the field for the first time Sunday and played a game with it... and by the end of that game I was leaking out of the velocity hole...
Prior to the game it chono'd decent (275-290ish - 800 PSI input)... I switched guns and kept playing. Throughout the day I aired up the RT Classic several times and it was NOT leaking (this was without firing it though).
At the end of the day I went to the chrono with about 50-75 rounds and shot rapid fire and somewhat slow over the chrono to see if the leak would come back and how consistent it was in terms of velocity. The leak did come back after maybe 20-30 shots... and every once in a while I would have a 100 FPS drop in velocity for a single shot (I would be shooting 275-290 and then a super low velocity shot would happen where it would be 180-190 for a single shot... then go back to 275-290).
At that point the only thing that had not been changed were the o-rings and washer thingy on the reg pin assembly. I changed them out.
I realize this is an RT Pro valve-image but I couldn't find an image of an RT Classic valve and they are similar enough for my purposes:
So far I have changed out the following with fresh o rings from a new AGD parts kit or new parts from AGD:
-Power tube tip o ring
-Power tube o ring (below spacer)
-bumper
-# 16 (no #15 in rt classic valve)
-# 19
-# 20
-# 11
-# 9
-# 7
-# 2
-New high pressure piston
-New sear
-Both O rings and washer thing on reg pin assembly
Did NOT change springs in the back of valve.
Up until this evening the only soft seals that had not been changed were the 2 orings and the washer sandwiched between them on the reg pin assembly. When I pulled out the reg pin this is what I found in between the 2 orings on it:
As you can see... there was a gap in this one that you can see at about the 10 o'clock position.
I also own an RT pro... and have a parts kit for that... I noticed in the RT pro parts kit the part matched exactly... when I compared them they were the same size and both had the gap.
But when I looked in the RT Classic parts kit it had a part in there that was the exact same size but with NO gap... it was one piece. So... I suspected somewhere along the way someone replaced it with the part from an RT pro because that was all they had on hand... no way for me to know. I used the part out of the RT Classic parts kit (no gap).
I oiled the o rings on the reg pin assembly and added air into the male quick disconnect and aired back up and fired about 20-30 shots and it started leaking out of the velocity hole again. It also sounded like I was still getting those low velocity shots every once in a while (no chrono, could only go by sound).
Any input on whether I should try the washer with the gap from the RT Pro kit? could that be the issue?
Should I try going back to the old piston? It didn't leak...
These are the two things I am curious about...
Let me know if there is anything else I should consider to address this leak.
Thanks for reading this whole thing, and for your help and knowledge.
Have a good evening and a good week.
M