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I have a Yong Heng probably 3 years old and recently this winter has begun to act weird whereby when powered on and connected it will run about 30-60 seconds before the pressure engages and starts building pressure. After it takes off with pressure building, it works like always, pumping up to...

I first noticed that my pressure was leaking down a little when it is topped off at 300bar. It always seamed to settle down after just a little bit without losing any more pressure but now it is going down a little too fast for me over time... I submerged in the pool and can see the bubbles...

Does anybody have any experience working on these? I opened the value I guess a little too fast and now air is leaking out of what I assume is a safety hole. Never mind. I fixed by replacing o-rings. Unscrewed allen plug. I believe it was 2mm. I then used a sharp object to separate the sleeve...

I was looking at the plethora of posts with people having all kinds of issues. Some would say fun _ trying to get consistency with their New PCP’s that give a shooter all the adjustability options that are available with today's PCP's and all I could think of was; I hope they like chasing...

I have a YongHeng compressor that does not have the Auto Shut off built into the pressure gauge. Would I be able to purchase the Auto Shut of gauge as seen below, and convert mine? I was wondering if anybody has experience with this who could respond? 

I was wondering if someone with experience can answer some questions on the Jsar Hawk air rifle. Do we know the origin of the gun? JSAR appears to modify the gun for performance but I was wondering who makes the barrel? One of the videos they say that the barrel is not choked. What is the...