Classic valve dropping off.

[38super]

I have an old 68 level 7 that I am trying to get back up on its feet. It drops off very fast if I try and pull the trigger rapidly. I've replaced all the O-rings and the bolt spring. What else should I be looking at?

[JKR]

Input tank pressure? Make sure you aren't using a low pressure tank. Mags like high output pressure tanks.

[38super]

Yeah I'v got some standard tanks and a 1200 psi output for my RT. Still no-go.

[Beemer]

Did you replace the reg seat?

[38super]

The reg seal? Yes sir I have. Also took out the reg piston and cleaned it and changed that o-ring as well.
Perplexing...

[Sandman]

Shoot down can be caused by the gun not being able to fully complete the trigger cycle from too long of a trigger rod adjustment.
If you are feeding the proper pressure then the gun might not be able to complete that cycle before you are pulling the trigger again.

you got input pressure covered...trigger rod is on the list to rule out...

[38super]

I will try that next. Thanks very much.

[38super]

Thickness of a business card right? Still no-go.

[Beemer]

It shoots fine at slow rate of fire??

Whats the velocity at shooting slowly.

Is spring pack in good shape and in right.

Check air lines and fittings for restrictions, dirt, tape, thread sealant etc...

What kind of air line you have. Micro, Macro.

You did clean everything real good when you changed rings right.

Verify tank reg output is good.

3 or 4 drops of oil in ASA.

[38super]

It shoots fine at slow rate of fire??

Whats the velocity at shooting slowly.

Is spring pack in good shape and in right.

Check air lines and fittings for restrictions, dirt, tape, thread sealant etc...

What kind of air line you have. Micro, Macro.

You did clean everything real good when you changed rings right.

Verify tank reg output is good.

3 or 4 drops of oil in ASA.

Yes to all those things. I feel like such a dummy now though; I went all the way through the old Tom Kaye debugging videos last night and suddenly realized what my problem was. At some point in the last couple years (probably before I had my eyes fixed) I had taken the gun to pieces for a cleaning and inadvertently put the on/off top back in upside down. Flipped it back around, per the laser etched diagram on the valve body which I stupidly didn't check, and it purrs like a kitten now.

Should be good for another 28 years before I need to give it anything g but oil.

Thanks to all of you guys.

In my defense, I go in and out of this stuff spring and fall and almost never have to tech my guns. Plus turning into an old geezer. [ATTACH=CONFIG]100138

[JKR]

Awesome...Mags purring like a kittens is a beautiful thing!

[JKR]

By the way, I love those SP wood grips!

[38super]

By the way, I love those SP wood grips!
Sadly they are probably worth more than the mag they're attached to.