Well, it's both a pumper and a PCP rifle. After about 2000 shots it's frozen, meaning it won't won't pump anymore. Knowing this was a possibility I baby'd the crap outta this rifle. I pumped slowly, I made sure everything was well lubricated. Now I need to fix it... So... the question is how? Anybody have one of these and have brought it back to life?
Tuning Aspen .25 Pumper / PCP
- Thread starter Milehighguy
- Start date
It won't physically move the pump? Like the arm is frozen and won't move or when you pump no air pressure adds to the chamber? Also will your gun hold air if you fill it with an outside source?
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Raden1942,
So, it was frozen to the point where I thought I'd break it if I pulled harder. However, I lifted the handle up far enough to reach the bleeder screw and was able to de-gas the gun which allowed the handle to then swing free. Still, a few attempted pumps and I can feel that I'll have the same problem. So, I found a video on YouTube by a guy named Big J. I followed his teardown and bought some -006 o-rings, which apparently fix the issue I'm having. Unfortunately it seems my Aspen is one that uses a brass nut inside the pump tube to hold the pump rod in position and requires a specialized tool to remove it. So, I'm stymied at the moment and have to figure out how to make a tool to do the job. I am confident though that if I can get that brass nut out and replace the seals I'll be back in business with the Aspen.
So, it was frozen to the point where I thought I'd break it if I pulled harder. However, I lifted the handle up far enough to reach the bleeder screw and was able to de-gas the gun which allowed the handle to then swing free. Still, a few attempted pumps and I can feel that I'll have the same problem. So, I found a video on YouTube by a guy named Big J. I followed his teardown and bought some -006 o-rings, which apparently fix the issue I'm having. Unfortunately it seems my Aspen is one that uses a brass nut inside the pump tube to hold the pump rod in position and requires a specialized tool to remove it. So, I'm stymied at the moment and have to figure out how to make a tool to do the job. I am confident though that if I can get that brass nut out and replace the seals I'll be back in business with the Aspen.
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Ok... a bit of an update. I was able to get the brass nut out using two shims and needle nose vice grips. I successfully replaced the existing seal with two -006 o-rings. I really thought it'd all be good at that point and put everything back together. Unfortunately no matter how much I pump I get no pressure, no air into the air reservoir. After fiddling around for a bit I noticed that the pump was indeed pumping but the air was escaping out the barrel and not going into the reservoir. It reminded me of when I first received my Gauntlet. I had to use my buddy bottle to fill the reservoir the first time as the valve wouldn't open using a hand pump. So, I used my buddy bottle and sure enough I was able to fill the Aspen. However, with the reservoir filled the pump handle is impossible to move. It's like a vacuum is created when the reservoir has air in it and the more air it has the stronger that vacuum is. Also, the Aspen is not holding air. It takes about an hour to lose the full air charge. I am... confused and feeling a bit defeated. It seems every step forward is followed by two steps back. I've now had the Aspen apart five separate times and just can't seem to get things going.
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Replace all seals and clean and grease threads with divers grease maybe? Sometimes when you leave a gun degassed too long the seals deform and refuse to hold air even tho they were fine b4 you degassed. I wish I could help you with the pump tho but I just don't have any experience with it.
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