I was beginning to think that perhaps my hand pump would never die. Eight years is a long time, just for static oring life, let alone the dynamic ones, and yet it did work for that long. I'm very impressed. This is just an Amazon cheapie too. It's actually not worth fixing, if your time is worth anything to you, a new one can be had during Christmas time for $20. That's cheaper than most oring replacement kits. Since I've never re-built one, and had the little kit that came with it, I re-built it yesterday just for fun and knowledge. I have two other new ones still in the box, if I screwed up, so school was in session.
It came apart very easily. The condition of all the orings and parts actually looked pretty good. I'm not exactly sure which part was the bad one, or bad enough to have caused the problem. I just changed all the orings and swapped in the parts from the kit. The water in the central chamber was clear too, not milky like some of the ones I saw on some videos. I put in a 50/50 pre-mixed anti freeze to replace it. That part was the only pain in the butt. It's hard to get that piece back on to seal off that inner cooling chamber. Once all back together, it worked like new again, and held air all night.
I think my pump went so long because of how I use and store it. When I pump, I do full strokes with full stops and pauses. It looks slower but I believe it works so much better that it ends up being faster. It doesn't usually get that hot either, this way. I always elevate the gun so that the fill whip is vertical while pumping so that no water goes right into the gun. I have never had water make it into any of my guns filling this way. I am sure to purge with the whip still vertical too. When I'm done, I put a deadhead on and pump up some pressure and bleed it again, then I pump it up to 1000 - 1500psi and leave it. I always leave pressure in it, just like a pcp, to keep all the orings engaged and to keep the atmospere out. It sure seems to work!
I have plenty of tanks and compressors but I still regularly use the handpump at work because it's quiet and pretty fast for small volume fills. It's not obsolete yet, like me. I'm still thinking about getting the Huben, just to have a good, light one. That will be the kind of thing that if I ever see one in an airgun shop, I will just reach over and drop it in the basket.
It came apart very easily. The condition of all the orings and parts actually looked pretty good. I'm not exactly sure which part was the bad one, or bad enough to have caused the problem. I just changed all the orings and swapped in the parts from the kit. The water in the central chamber was clear too, not milky like some of the ones I saw on some videos. I put in a 50/50 pre-mixed anti freeze to replace it. That part was the only pain in the butt. It's hard to get that piece back on to seal off that inner cooling chamber. Once all back together, it worked like new again, and held air all night.
I think my pump went so long because of how I use and store it. When I pump, I do full strokes with full stops and pauses. It looks slower but I believe it works so much better that it ends up being faster. It doesn't usually get that hot either, this way. I always elevate the gun so that the fill whip is vertical while pumping so that no water goes right into the gun. I have never had water make it into any of my guns filling this way. I am sure to purge with the whip still vertical too. When I'm done, I put a deadhead on and pump up some pressure and bleed it again, then I pump it up to 1000 - 1500psi and leave it. I always leave pressure in it, just like a pcp, to keep all the orings engaged and to keep the atmospere out. It sure seems to work!
I have plenty of tanks and compressors but I still regularly use the handpump at work because it's quiet and pretty fast for small volume fills. It's not obsolete yet, like me. I'm still thinking about getting the Huben, just to have a good, light one. That will be the kind of thing that if I ever see one in an airgun shop, I will just reach over and drop it in the basket.
on occasion, but I always did take a break halfway through for both our sakes, lol. The 3rd chamber o-ring (the only one you can't lube without full dissambly) died hard.
