RT classic on/off

[sjrtk]

tad more help please.

I installed the .750 pin. I gassed it up but had a slow leak from velocity area. I turned it up until it fired, leak getting worse and worse until it...well best way to describe is to say it had a "machine gun leak" from the back. it was loud and super fast. I took it all apart and replaced orings, same issue. I had a leak down the barrel too, but I put level 10 in a while ago and have not touched it at all. I did notice, a white plastic bit in the reg valve pin assembly that was broken. not sure how much that matters.

P.S. Are buna orings ok to use in the marker?

P.P.S. I am either going to sell the parts since the marker as a whole seems to be possessed OR send it to tuna. I am torn about spending more money to try to get it working though.

My RT classic has a similar issue when i got it (sat in a closet for 7 years or so). I replaced the Regulator Piston (under the velocity adjuster) and it cleared the issue up. There is a regulator seat inside the piston that can/will ware out over time.

[Yudanja]

I replaced it. happens with both the original and new one.

I tried following http://www.youtube.com/watch?v=wfcnqeIznLQ and messed up one of the pistons.


Thanks for all the help guys, I am just going to sell it off.

[athomas]

I did notice, a white plastic bit in the reg valve pin assembly that was broken. not sure how much that matters.

That is a plastic split washer that is used as a spacer for the two orings.


I would have said it was your it sounded like your regulator piston was a low pressure version, except for the machine gun leak sound that sundenly appeared. That is more indicative of a piece of dirt that got caught in the regulator seat oring or other oring that can allow air to get from the input to the chamber. A piece of dirt or a burr on an oring sealing surface can cause the leaking out the back due to over-pressure.