Refilling the Huben GK1 5000psi
- Thread starter TC2Mc
- Start date
Well if you use Nitrogen as the feed to your compressor and pump to 35mpa that extra 1500 psi does give you a significant increase in shot count btw the K1 is regulated so your 3500 psi vs 5075 psi does not affect the shot count
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You mean it doesn't affect the power? Filling to 3500psi rather than 5075psi definitely affects your shot count in a regulated rifle.
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Yeah - my pump clearly has issues.As AlanMcD said pumping to 5k isn't very advantageous.
Here is mine hitting 5k with 2 $50 3 stage hand pumps. Just the last couple seconds then I bled and shut down.
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Allen
I have already lubed it lightly as directed in the manual, so i don't think that's it. I may will disassemble it but at the moment it's my only working hand pump and even though I have a CS4 compressor I'd like to always have one working pump even if it only gets up to 4000 psi
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Well, I jave found those vevor handpumps on ebay from as little as $30 to as much as $60ish so you could get a second one if it's not out of your budget and see if you can fix the first one.
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just found the gx e cs4 for 419,67 on Allie express takes 2 weeks delivery oh free shipping to
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If you’re budget permits I agree. Great compressor. I’m looking to upgrade to it. I have gx cs3i and cs4 now
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It’s fun a couple of times but then shot count starts becoming more important getting a full mag down range accurately at 50yrds starts becoming more fun. Unless you plan on beheading raccoons on a regular basis getting 10-12 shots and refilling then pumping becomes pretty tedious. If you like that kind of power consider getting the k1 also. They make a great pair.
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It doesnt take that long to fill.
You can find them on ebay, anywhere from $30-$60 shipped they won't state 5000psi but they can do it. I've done it several times a day for a month without problems.
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My 1st PCP was a Matchguns MGH1. I started out with a used Hill Mk5 hand pump and even getting to the gun's 200bar fill pressure was quite a workout (I'm a skinny 68 year old in pretty good shape). However, it's humid here and I didn't like needing a shower each time.
Within a couple months, I found a YH and a 6.8l CF tank for good prices and haven't used the Mk5 since. It's just a backup now.
Last February, a GX-CS4 replaced the YH. It easily refills the 6.8l tank to 325bar. It's slower than the YH but less of a hassle.
All my PCPs get filled from the tank. The K1 & GK1 never see more than 300bar.
Within a couple months, I found a YH and a 6.8l CF tank for good prices and haven't used the Mk5 since. It's just a backup now.
Last February, a GX-CS4 replaced the YH. It easily refills the 6.8l tank to 325bar. It's slower than the YH but less of a hassle.
All my PCPs get filled from the tank. The K1 & GK1 never see more than 300bar.
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Hey idk if this is out of line or not to ask but does anyone else seem to think these big manufacturers are just taking these $40 Chinese pumps and just slapping a label on them and marking them up….. or am I trippin? 
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You may be on to something…Hey idk if this is out of line or not to ask but does anyone else seem to think these big manufacturers are just taking these $40 Chinese pumps and just slapping a label on them and marking them up….. or am I trippin?
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