What do I need to do to maintain a hand pump?
- Thread starter true1hart
- Start date
I have two Hill Mk4's and I use them most days to fill my seven PCP's, I pump a lot! I consider hand pumps "low" maintenance not "no" maintenance, pictured is a Hill Mk4 service kit, the o-rings are remarkably durable requiring replacement very infrequently however disassembly cleaning relubing I do every couple of months, this takes at least an hour or two, clean everything inside and out with alcohol clean the internal filter inspect the orings, I've learned that o-ring #18 & #12 are the ones that fail most, also during use keep silicone grease on the #30 tube surface, I've added additional moisture and "dirt" filters on my pumps. I highly recommend the Hill Mk4! 
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I've doing the 50 pump regime to let both the pump AND the gun's tank/air cool a little.
"Hot air" pressure is higher than "cool air" pressure. Keep the air cool.
Mike
"Hot air" pressure is higher than "cool air" pressure. Keep the air cool.
Mike
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I put a drop of silicone shock oil on the small rod (un-screw the T handle) and a drop on the outer rod every 10 fills. I can pump 80 strokes before it starts to get hot.
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What size tanks you guys filling with these ? Looking at an Edgun r5m long, think it has a 300cc.
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I'm filling directly to my guns 180 cc air tube. Under normal re-fill conditions I always pump to 3200 psi in a single session. However, After repair work I re-fill in 2 sessions. Best guess is 150 cc is the maximum I pump without a cooling session. Shooting 4 mags @20 FPE or 3 mags @ 30 FPE keeps me in the sweet spot for hand pumping.
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I fill my 213cc Gauntlet and 500cc Nova with my Hill MK4. Super easy, just takes time to let the pump cool. It barely gets warm, but I pump slowly to help prevent heat buildup.
Takes 80 pumps to refill the Gauntlet back up to 3000psi after 25 shots. One 20 min cool down.
Takes 200 pumps to refill the Nova back up to 2900psi after 100 shots. Four 20 min cool downs.
I have not even had the pump a year, but so far so good.
Takes 80 pumps to refill the Gauntlet back up to 3000psi after 25 shots. One 20 min cool down.
Takes 200 pumps to refill the Nova back up to 2900psi after 100 shots. Four 20 min cool downs.
I have not even had the pump a year, but so far so good.
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I have Hatsan pump. I filled that space what is between cylinders with aluminiumfoil. It doesn't get hot no more. And I chanced piston o-ring to Viton made. My pump is older 2-stage 230bar. 180cc At44 cylinder from 60 bar to 200 bar, no pauses. It keeps cool. Sorry for bad english.
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