Benjamin Valve stem seal

Went out shooting the 392pa this morning...about 10 shots in started shooting super weak. Cracked the bolt back, and gave it a pump to hear all the air rush out the transfer port. Broke it down to find this.
1000001809.jpg
 
Got it all back together. Removed the bits of seal that came off, cleaned up the seal/mating surface inside the valve. Everything is good...$0
View attachment 447268
Cphp 22 ammo
The seal will continue to come apart because it the rubber is aging and starting to break down. Just be aware that you may still need to replace the exhaust valve in the future.
 
The seal will continue to come apart because it the rubber is aging and starting to break down. Just be aware that you may still need to replace the exhaust valve in the future.
I shaved off the rest of the outer flange that was coming apart and gotten trapped causing the leak. It will get replaced at some point....but not yet
 
Got it all back together. Removed the bits of seal that came off, cleaned up the seal/mating surface inside the valve. Everything is good...$0
View attachment 447268
Cphp 22 ammo
Like he said, order a new one and let it be on its way while you enjoy your plunger catching it's second wind.
Pardon the pun.
😃
 
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Like he said, order a new one and let it be on its way while you enjoy your plunger catching it's second wind.
Pardon the pun.
😃
Yeah I don't have any illusions about needing to order a new 1....I am also that guy who won't put it in till this quick fix fails. Am curious how long it will last....for science!!!
 
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