i'll chime in..... 840 has a plastic valve that can leak! I have the same one here, (camo, even has a F.O. front sight). Traded a working 35 for it, thinking I could fix it. I have tried everything, new seals, plenty of 30wt ND, and you here it hiss as soon as you pump it.If you rack the bolt,load it and then pump it and fire real quick, it acts as it should. if you go slow, you here it hissing out. good luck with it!
Quote from: Matchstickshooter on October 07, 2023, 07:57:47 PM i'll chime in..... 840 has a plastic valve that can leak! I have the same one here, (camo, even has a F.O. front sight). Traded a working 35 for it, thinking I could fix it. I have tried everything, new seals, plenty of 30wt ND, and you here it hiss as soon as you pump it.If you rack the bolt,load it and then pump it and fire real quick, it acts as it should. if you go slow, you here it hissing out. good luck with it! Did you try a new valve? The plastic one, or look at it? Anyway I since found some good reports on the 840, and I am sorry yours is leaking, I won't get mine for another week or so and I am hoping for the best. I found new valves on Amazon by the way
be a miracle if this works,