A friend was struggling to cock his Hatsan 125 and it was firing erratically. I was sure there was carnage in his chamber but when I opened up, spring whole, no broken bits, no chafe marks inside the cylinder. The only thing I can notice is a rock hard piston seal. So hard I had to hammer out the piston with more vigour than I enjoyed. But at last it is out and I don't think there is any lasting damage, it is a Hatsan after all.
I'm very sorry to hear that MZE is no longer with us because I had just got to learn his name from his magnificent posts and I hope we will appreciate the wisdom of those posts for a long time still. My condolences to anyone who knew him personally and had the pleasure of meeting him in real life.
I'm guessing that my friend left his black Hatsan in the midday Karoo sun and that cooked the piston seal rock hard.
Pyramid Air says $11 ,I'm no professional but I got the piston out without killing myself, I hope I will get it back together OK."Fits Walther Falcon Hunter, Walther Talon Magnum and Hatsan 125 and Benjamin Trail NP XL
For professional installation only."
Does anybody know who will post me a replacement seal for a good price?