Just bought a new RT from Airgun - problems already

[John Dresser]

Turn up your velocity and/or don't use an LP tank.

My velocity is already at 300 and since my tank is putting out 900, it wouldn't be considered low pressure.

[secretweaponevan]

My velocity is already at 300 and since my tank is putting out 900, it wouldn't be considered low pressure.

If it isn't firing, how can you be sure that it is firing at 300 fps?

If the trigger is pressurized but it won't fire, it is either:
too low input pressure
too low a velocity setting to overcome bolt spring force
bolt is stuck in powertube (don't superglue foamie whiile bolt is in valve )
not enough oil
a malfunctioning on/off (if it won't allow gas to the powertube it would provide symptoms you are describing)
a too short/long of a trigger rod adjustment

First see if gas is getting to bolt by:
Unload and Degas marker
Remove bolt and bolt spring
Hold trigger
Gas up
Briefly let go of trigger
Pull trigger

If marker vented down barrel while trigger was released and then stopped while trigger was pulled your on/off is fine. If not, your problem is in your on/off.

Let us know.

[russc]

Are you using a pure energy tank?

[Shane-O-Mac]

Best thing I have been able to find out, without messing with the gun personally is to crank up the velocity,until the piston starts venting and then back it off just till it stops. Early RT's had an issue with the reg piston not having the piston bleed off set high enough. It was suggested to me that you need to crank up the RT's adjuster 3 full turns from when it worked without Lvl 10. As the Lvl10 breaks in and you fine tune it, the pressure will be a bit lower. You coming out for the pump event on the 25th-26th?

[John Dresser]

Best thing I have been able to find out, without messing with the gun personally is to crank up the velocity,until the piston starts venting and then back it off just till it stops. Early RT's had an issue with the reg piston not having the piston bleed off set high enough. It was suggested to me that you need to crank up the RT's adjuster 3 full turns from when it worked without Lvl 10. As the Lvl10 breaks in and you fine tune it, the pressure will be a bit lower. You coming out for the pump event on the 25th-26th?

I turned the classic RT up until it bled pretty bad but the trigger still didn't do anything. If it is this month, no - I'll be down at World Cup.

Are you using a pure energy tank?

Yes. One of the tanks I tested was a PE.

If it isn't firing, how can you be sure that it is firing at 300 fps?

"It shot fine for about 50 to 100 shots at the field but it was dropping off noticeably" - from the first post.

Good guesses on the bolt, but it was actually a really tight front screw and a moderately tight field strip screw.

[Coralis]

Sometime the problem you are describing can be caused by your ASA on/off depressing your bottle pin valve too much or not enough so that the airflow from your bottle is insufficient to keep up with your gun causing shoot down.

[Shane-O-Mac]

Well we will have to try and raise the bleed off pressure of the piston on the classic RT. Gunga mentioned that many early ones had to be reset. Lemme see if I can track down a different piston or how to go about turning up the bleed off setting.

[John Dresser]

Well we will have to try and raise the bleed off pressure of the piston on the classic RT. Gunga mentioned that many early ones had to be reset. Lemme see if I can track down a different piston or how to go about turning up the bleed off setting.

Thanks!

Sometime the problem you are describing can be caused by your ASA on/off depressing your bottle pin valve too much or not enough so that the airflow from your bottle is insufficient to keep up with your gun causing shoot down.

Yup, you nailed it. The RT Pro now works. The drop off wasn't the tank but the asa itself which is a little odd since it was one AGD provided. Thanks to everyone that helped, especially the people who suggested that. :)

[secretweaponevan]

Yup, you nailed it. The RT Pro now works. The drop off wasn't the tank but the asa itself which is a little odd since it was one AGD provided. Thanks to everyone that helped, especially the people who suggested that. :)

I pointed this out on post #21. Could have saved yourself and the rest of us some time.

There might be a problem with your ASA.

Some guy on here had a heck of a time troubleshooting till he realized that earlier in the day his on/off ASA broke and would let only very little air through very very slowly.

[Shane-O-Mac]

I pointed this out on post #21. Could have saved yourself and the rest of us some time.

Way to be a smart arse..................................

[secretweaponevan]

Way to be a smart arse..................................

Yeah sorry, the PbNation.com tag brings it out in me, especially when I spend my time diagnosing a problem and am ignored.