Has anyone had the piston on their Hatsan leak down after setting up awhile? I believe there is a fill port on these once the stock is removed. I was just wondering if anyone has had to deal with this situation.
My hope for you is that you get good customer service. I’ve heard that the direct service from Hatsan could be better, whereas if you bought it from say Pyramyd Air, just call & explain. They’ll pay shipping and get you a brand new one.
Pulled the stock and action apart. There is a hole and I can see an air inlet about in the middle of it. Standard Hatsan pcp air probe is just a little small to insert. I did read that the piston should be able to be pumped up. Both the probe fill adapters I have are the same size,.350. Would like to attempt to add air, what do I have to lose?
There should be a flathead screw on the side near the fill hole, that screw let the air out if you want to reduce power, don't overfill the recomended bar, you can destroy the gasram