GTA
Airguns by Make and Model => Crosman Airguns => Topic started by: neric on March 22, 2012, 10:17:38 AM
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The owners manual says nothing about leaving one pump of air in the chamber for storage. Daisy pumpers are supposed to leave one pump.
I don't trust Crosman owners manuals after coming across a significant omission a year and a half back (can't remember what it was about, but I verified the omission with BB Pelletier and it was in fact an omission).
So,,does one leave one pump of air in the chamber for storing,,or not.?
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2 pumps, and keep the piston oiled occasionally (100 shots or so) with Pellgunoil.
Owners manual is written by "lawyers", storing with pressure equals gun-loaded in their world.
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Ah,,,right,,,loaded gun. Thanks.
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I asked Crosman.com and (probably after checking with their lawyers) they responded with:
"Unfortunately, we do not sell upgraded trigger packages for the 1377 pistol. We do not recommend leaving a pump in the pistol as this keeps the seals under pressure which may cause leakage down the road. Dry firing is not a problem with the model 1377."
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My *old* manual from the 80s states that you should keep two pumps in it (enough to in theory discharge a pellet barely out of the barrel) when storing it. This should be good for a few months at a time. It is an interesting example on how legal attitudes have changed and are overriding common sense.
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Crosman.com ...? If it makes you feel better, don't pump it.
Whatever works for you, you can re-seal it later, that's much easier than keeping two pumps in it. LOL
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My *old* manual from the 80s states that you should keep two pumps in it (enough to in theory discharge a pellet barely out of the barrel) when storing it. ..............
Stock 1377 built in '09 .....298fps @ 2 pumps w/7.0gr pellet
Stock 1377 built in '10......302fps @ 2 pumps w/7.0gr pellet
Thats a bit harder than barely clearing a pellet....IMHO
Sure wouldn't want to provide penetration depth data in my thight(or where ever)
at that power level. :o
I store one pump and open bolt slightly to keep o-ring from becoming perminatly smashed and
compromising the bolt seal.....Set safety and 'then' set gun down.
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I think the reason is that under longer-term storage, 1 pump might not be enough. I've had old pumps that have leaked out their air after a few months in storage, so older seals might be a factor as well in that recommendation.
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Excellant point.
My 1377's are pretty new andrarely get more than 48 hrs rest.
So 1 works for me......so far.
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ive always wondered what exactly the point of keeping it pumped is. people say its to keep the seals tight and keeps debris out, but the spring in the valve is REALLY strong already.... so unless you have a really light valve spring i just dont see the point. is there something im missing?
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It's important to keep them LUBED with two pumps
The main problems are with the stock pump cup and the seals...
The residual compressed air that doesn't get into the valve keeps the pump cup expanded and the seal around the valve lubed due to pressure. Without the air pressure pushing out, the pump cup MAY shrink to where air escapes past the sides. Air pressure within the valve helps keep the internal seals lubed also.
I always keep two pumps in my pumpers now because I'd rather not change my seals again..
The PUMPERS that you SHOULD NOT STORE WITH TWO PUMPS are the old AUTO COCKERS.
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ok, THAAAAT seal... makes sense now. :)
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Crosman.com ...? If it makes you feel better, don't pump it.
Whatever works for you, you can re-seal it later, that's much easier than keeping two pumps in it. LOL
My point was the lawyers consider 1-2 pumps as a dangerous condition, and that's why it's not in the manual. I do keep one pump in mine since I use it every week or two.
What do you think about dry-firing?
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Dry fire all you like, not enough spring tensions and valve issues with these small guns to hurt anything inside.
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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?
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I store all my pumpers with two pumps, and first thing I do when taking it out is dry fire it to confirm it held the air.
;)
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I store all my pumpers with two pumps, and first thing I do when taking it out is dry fire it to confirm it held the air.
;)
DITTO! 2 pumps!
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The 13xx does need to be cocked to be pumped.
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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.
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Mine either... ???
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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.
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Mine either... ???
Likewise here. The 13xx do not need to be cocked in order to be pumped.
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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:
(https://i.imgur.com/ZR8mQTe.jpg)
Wyo
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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
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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. ;)
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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.