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its not stupid question, i have not dry fire my dreamline and still not a single valve seat last more than 300 shots. All i did was raised hammer spring tension with 2mm washer because FX lied about power of this gun. Without washer sure valve set could last longer but the gun is weak on...

@biohazardman i tried several o-rings for my removable valve seat and used one that is best sized for internal size of my gun, i am pretty sure it holds pressure well. So there is only one place left where my valve could leak ( cone part on my valve seat). I will try to polish both parts as both...

thank you for advice!

I have FX Dreamline, its valve seat is nightmare. In less than 200 diabolo fired it start to leak slowly. So far i have changed two seats and ordered new one, same thing happen with new installed one so i wanted to tune my valve and make new valve seat and pin which will give me more power or...

I have new version of dreamline (after serial number 0101759). This model have longer valve pin( bigger inner plenum) but same valve seat. I had to replace 2 valve seats before i fired 300 shots! Both valve seats had damage on the cone where needle is closing air so they slowly start to leak...

Do you need to remove air cylinder before hammer spring adjusting or is safe to adjust it with cylinder on?

Thanks for the offer Joe. I could sold my gun and buy full power version if i wanted. Restoring full power on my gun is a challenge so i want to achieve that. Second gun for me will be PCP.

Thanks for reply John. My other parts are the same as at full power version (piston does not have hole in front and gas ram is the same version 40450 as in full power version) so the power was reduced only by the smaller transfer port diameter. As far as i know Gamo IGT MACH1 have 33mm cylinder...

Hi! Can anyone tell me what is the diameter of transfer port for full power version (45j) of this rifle? I bought my rifle online and got reduced power version so i drilled my transfer port to 3,5mm (1.37795 inch) but still i dont have full power like original 45j model. Is now my hole bigger...

You can find parts for gamo rifles online. For the torx screws I agree, next time i will replace those with same size hex screws.

I was careful. Yes, setup was tending to slip under pressure so i needed to hold the rifle body and car lifter by my hand. For the next time i will add few wooden parts on the frame so the rifle body cant move anywhere.

Thanks for the reply! I have already disassembled and assembled my rifle. You have right, that pin is compressed by the gas ram so i needed to push gas ram inside the cylinder to be able to remove that pin. I have used this wooden frame : car lifter like this: and this piece...

Hi! My gun have two safety pins unlike other gamo air rifle versions with only one pin. I have removed first pin but i dont know how to remove second one. This pin from photo: That pin have two small holes and dont know what i need to do to remove it. Turn it clockwise or counterclockwise...