Hello Jet one owners, My jet one was preforming superbly til it would no longer stay cocked. Hatsan usa sent me a new hammer sear, i installed it and it did not fix the issue. They requested the gun back for inspection. After they returned it to me there was a short note saying they changed out the trigger sear , hammer sear , hammer and hammer spring. Well needless to say that fixed the hammer sear cocking problem.
But now the gun is shooting terrible . Before the work they did this jet 1 was shooting dime size groupa at 25 yards with a 3x9 scope using jsb 15.89 hades pellets. 11 out of 14 shots you could cover with a dime. When i sent it in there were no spacer washers on the hammer to increase tension . When it returned there were 3 1mm washers on the hammer lug. Since i have shot the gun with 1, 2 ,and 3 washers or spacers and also completely removed all three. Still no accuracy as achieved before they handled my gun. Tested also with Jbs Ex 15.89 and Jts 18.1 pellets. At this time to dont Know what to think or where to start. I did take out the supposed new hammer and found that the forward most portion that strikes the valve was flawed , like there machineing missed 180 degrees of the camfer on the hammer face or they dropped it and it hit steel.Any way it had a burr and i fixed that. Cleaned it all up and reassembled and light lube. Will do more testing tommorrow. But what i think is they sent me and old worn out hammer spring and tried to fix it with the tension washers , but its so inconsistent that it might as well be a wall hangers. Any Ideas ???????
But now the gun is shooting terrible . Before the work they did this jet 1 was shooting dime size groupa at 25 yards with a 3x9 scope using jsb 15.89 hades pellets. 11 out of 14 shots you could cover with a dime. When i sent it in there were no spacer washers on the hammer to increase tension . When it returned there were 3 1mm washers on the hammer lug. Since i have shot the gun with 1, 2 ,and 3 washers or spacers and also completely removed all three. Still no accuracy as achieved before they handled my gun. Tested also with Jbs Ex 15.89 and Jts 18.1 pellets. At this time to dont Know what to think or where to start. I did take out the supposed new hammer and found that the forward most portion that strikes the valve was flawed , like there machineing missed 180 degrees of the camfer on the hammer face or they dropped it and it hit steel.Any way it had a burr and i fixed that. Cleaned it all up and reassembled and light lube. Will do more testing tommorrow. But what i think is they sent me and old worn out hammer spring and tried to fix it with the tension washers , but its so inconsistent that it might as well be a wall hangers. Any Ideas ???????