I got a PCP hand pump off Amazon. The directions are terrible. They indicate putting some silicon oil inside the pump. The directions are very unclear as to how much oil to put in. Any suggestions? Also any suggestions as to the up keep on one of these hand pumps.
Question about a PCP hand pump
- Thread starter Rangeland
- Start date
Just the thinnest film of silicone oil you can possibly apply to the sliding surfaces. Any excess will get wiped away on the first few pump strokes.
Silicone grease is a different thing, useful mainly as an assembly aid for static O-rings. It is too viscous for dynamic O-rings in a hand pump.
Silicone grease is a different thing, useful mainly as an assembly aid for static O-rings. It is too viscous for dynamic O-rings in a hand pump.
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Rangeland
Am looking at my copy of the same Owner's Manual that I'm sure you are. Directions are unclear, however does seem to indicate at #1 Refueling section, and I did this same operation at 800 pumps, add three drops silicone oil to solid steel inner shaft. If you spin the hand grips, as shown, and pull up, the solid steel rod is exposed. This solid steel rod has an O ring at end. It travels up and down in a tube that looks like a .30 caliber barrel. This secondary pump system generates the big pressures and gets very hot. Several ounces of a water/oil cooling mixture exist around this ".30 caliber" tube to draw heat away, that is the water cooling system. The three drops of silicone oil runs down solid steel shaft to lubricate hard working O ring at bottom. Don't worry I'll help, they never installed water/oil cooling mixture in mine and I blew an O ring. Have had it apart many times.
WM
Am looking at my copy of the same Owner's Manual that I'm sure you are. Directions are unclear, however does seem to indicate at #1 Refueling section, and I did this same operation at 800 pumps, add three drops silicone oil to solid steel inner shaft. If you spin the hand grips, as shown, and pull up, the solid steel rod is exposed. This solid steel rod has an O ring at end. It travels up and down in a tube that looks like a .30 caliber barrel. This secondary pump system generates the big pressures and gets very hot. Several ounces of a water/oil cooling mixture exist around this ".30 caliber" tube to draw heat away, that is the water cooling system. The three drops of silicone oil runs down solid steel shaft to lubricate hard working O ring at bottom. Don't worry I'll help, they never installed water/oil cooling mixture in mine and I blew an O ring. Have had it apart many times.
WM
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what i would do is watch a vid and learn how to disassemble it .. pretty much if you use a liquid silicone oil like 30w silicone shock oil from a hobby place, get some on your fingers and lather 'everything' internal down with it ..not so much its running everywhere but definitely wet .. then assemble .. that will keep enough squishing around in there to prevent corrosion which is the main concern .. once the surfaces pit its degraded from there ... once you know how to break it down and reassemble and what does and doesnt need to be tight its pretty easy to do it on a regular basis to wipe everything off, dry it out and relube and keep it running indefinitely ...
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Rangeland
When my hand pump went bad I went to YouTube to find repair videos. Topa Manufacturing Company, the guys who make these, had one of their employees, Coby Leo, do a two part video, on 4/22/20, called, "How to Repair 300bar 4500psi PCP Air Rifle Pump." After watching a couple of times, I tore mine apart, and repaired it. Recommend you watch these videos and look for solid metal rod, inner ".30 caliber" tube and coolant.
WM
When my hand pump went bad I went to YouTube to find repair videos. Topa Manufacturing Company, the guys who make these, had one of their employees, Coby Leo, do a two part video, on 4/22/20, called, "How to Repair 300bar 4500psi PCP Air Rifle Pump." After watching a couple of times, I tore mine apart, and repaired it. Recommend you watch these videos and look for solid metal rod, inner ".30 caliber" tube and coolant.
WM
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