Response Trigger Won’t Tune

Where did you get the R/T kit from? It might be defective. Try returning it if possible and getting another kit.

1) Purchased the RT at a Pev's store. As part of their maintenance attempt, they replaced the kit and it was a no-go.

2) I tried oiling the housing and screwing it all the way in. It didn't get too difficult to pull the trigger, but the piston definitely fired when I pulled the trigger. It just didn't fire very hard and didn't affect the trigger operation very significantly.


Edited by Still Naive - 28 May 2007 at 4:31pm

Well, obviously... I wouldn't be posting here if it was working :P

They attempted to replace it with a new kit and it didn't work either. They're not a fly-by-night retailer, and they get their parts genuine from Tippmann. Is there another possible culprit here that could cause it not to work?

Mine did this a few years ago and the culprit turned out to be a very small piece of balled up teflon tape that was stuck in the adjustment valve of the RT.

When I took it apart and saw a small black string hanging out of the fitting that screws into the body of the marker I pulled it. It came out in pieces of black teflon goo. I know that teflon tape is normally white, but from years of absorbing oil it had turned into a black gelatinous mass of goo.

I know that you said you replaced the RT. So this shouldn't be the issue. But...if you only replaced parts of it...you may want to remove the RT fittings from the receiver and make sure they are not plugged with debris of some sort. Same goes for all the hoses.
It doesn't take much junk in those little lines to foul up the works.

1) It's an A-5

2) I have an aftermarket powertube that is aluminum, so it shouldn't be cracked.

3) I tested it myself with an HPA tank that was newly filled and it's still not tuning. I just bought a tank, so I suppose that will play a role in what I do next (i.e. super RT, etc.)

I've undergone the very scientific method of blowing into the tubing to test air flow and it seems to be unobstructed. I'm still working on it, and I'll let you guys know as soon as I do what was wrong with it; in the meantime, if anyone else has any other possibilities I can try and rule out as I bang my head on my desk and scare the crap out of my downstairs neighbors, feel free :)

I had a similar problem and it turned out to be the small o-ring on top of the piston unit.  This is the part visible in the trigger frame that fits into the upper receiver.  The o-ring had a small, needed a maginifier to see it, nick.  This nick was enough to prevent the trigger from working properly.  Replaced it and used lithium grease on it and haven't had a problem since.

I dry fired a few shots with my finger against the tube and there was air coming from the tube.

Hey Naive,

I know where you're coming from, I just bought an RT like two days ago for my 98 and I had the exact same problem...couldn't get any pressure...even though the RT piston was moving, it wasn't giving me any resistance or rapid fire.  I doubt it's your o-rings, and you explained that the line is clear of obstruction...so try this out.

The trick for me was to put thread tape, or lock tight on the two banjo fitting screws that came with the kit.....this was an instant fix for me...the Rt worked perfect after that...well...sort of...it took me a long ass time to tune it to my liking....but once you have pressure and the trigger is working properly, just tune it according to the instructions....put the velocity adjustment screw all the way in, then do 1/4 turns and fire till you find the rate of fire you like....do this dry, no paint...its a waste.  So there you go, my guess is that you are losing pressure through the two screws on the banjo...lock tight those  guys and I'm almost certain you'll have it up and running....let me know how it goes,

Hope this helps....good luck

Did you have to pay for that?

RoboCop wrote: If it isn't something clogged in the lines, it probably has a leak somewhere. The only kind of upgrade that could restrict the r/t would be a cyclone as it uses the same excess gas.

Robo, thank you very much.  I'd been having some erratic operation with my R/T, but it hadn't yet gotten serious enough for me to get around to messing with it.  After reading your post, I checked the air lines and found the rear fitting had worked itself quite loose.  Tightened it and the R/T works like a champ again.  (Sometimes it the simple things. )

Still Naive wrote: Air flow into the piston seems fine too after using the very scientific method of blowing really hard into the little fitting while keeping my tongue in the back of my mouth to avoid tasting gun oil. So I'm a tard, what can you do?

That's the same way I checked mine, and I've been playing for longer than I care to admit. 

One of Murphy's Laws of Combat states:  It it's stupid, but it works; it's not stupid.


Edited by Mack - 19 June 2007 at 1:02pm