1377 Pumpmaster: leave one pump of air when storing?

[BackStop]

Forgot to add that the 1377 I had that was stolen I bought new in 1975-1976 was never stored with pressure and sat LONG periods of years without usage.

When it was stolen, the seals seemed to be working just fine.   It was always kept well lubricated.

[UCChris]

Mine either...

Likewise here. The 13xx do not need to be cocked in order to be pumped.

[WyoMan]

Wow, this is an old thread but this question does surface from time to time. The valve should be maintained in a state where it is sealed air-tight, and as such the seals would be pressed onto the seats. If you're using the oem springs (for the valve and hammer), and using the oem exhaust valve, the valve should be sealed just fine. No need to store with pressure in the valve. I've never seen one that needed cocked before pumping unless some or all of the above was modified.
I really like Scott's reason though - see if it's still holding air and something hasn't gone awry.

However, all of mine (nine of them) need cocked before pumped. This means that the hammer is pushing the exhaust valve open. So I keep two pumps in them for storage so the valves are sealed. And like Kerry said, keep them lubed.

A really light valve spring and a hard (Delrin) exhaust valve seal caused the cock before pump issue:


Wyo

[xtred1]

The 13xx does need to be cocked to be pumped.

Really?   I have never had to cock a 1377 in order to pump it.  Never.

Woops I forgot a word LOL

[maraudinglizard]

The 13xx does need to be cocked to be pumped.

Really?   I have never had to cock a 1377 in order to pump it.  Never.

Woops I forgot a word LOL

Nothing like having GTA auto correct, uh.  I keep a few pumps in mine, even the old rear cocker.

[Damo666]

I just bought two and both had about one pump in each when they were packaged.  I pulled the trigger right out of the blister pack and there was a pretty good pressure release. What does that say?

I bought my 1377 brand new about 2 weeks ago, however, there were no pumps stored in mine.

There's no leaks as I've left 2 pumps in it over the last few days, then when I pulled the trigger the air released.