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Air Arms s400 help


dicko
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Today i went to use my air rifle and it is very low on power so much so the pellet gets stuck at the top of the barrel or will only shoot out about 5 feet.It is holding air and has stayed on 180 bar since the last time i used it.Has anyone got any ideas or should i take it to a gunsmith when i can.Many thanks Lee

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16 hours ago, dicko said:

Just tried the talcum powder and yes air is leaking from the breach seal.I will go and order some and keep you updated.Many thanks for all of your help and knowledge cheers Lee

Hello, easy to change, buy a dentist kit off eBay, mirror/ tweezers/ pick, pick out old seal, with tweezers hold new seal in middle and carefully pop back in recess, , I use a length of dowel in barrel to stop seal before recess, some lube helps, cheers

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Just a quick update i changed the breech seal and managed to get pellets leaving the barrel,the next step was removing the hammer and spring and found the hammer/striker was stuck on the guide.A quick clean up with Autosol and brake cleaner and all is good.Once again many thanks for the help.

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So the breach seal set into the barrel that the probe and pellet pushes through isnt an oring ? What is it then ?  

Photo of oring being put into an s400 by an air arms service employee  .🙄

To replace the damaged breach seal oring  .

Screenshot_20210116-174903_Gallery.jpg

Screenshot_20210116-175251_Chrome.jpg

Edited by Ultrastu
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