Author Topic: PCP Hand Pumps (Read 6143 times))

singleshotcajun · « **Reply #40 on:** February 11, 2021, 07:56:52 PM »

Quote from: tracker1955 on February 11, 2021, 05:59:49 PM

Got the pump from Amazon yesterday, assembled it today after work, filled my Liberty to 2000 then stopped. Seems to work but must pump very slowly as it seems to have a stiff vacuum on the upstroke. If pulled up very fast it wants to rebound back toward the bottom of the stroke but only a couple of inches. Doesn't seem to have issues on the downstroke. Did notice in the Chinglish manual that it is filled with coolant but needs to have silicone oil added to the plunger. After many years of easy air from my tank and compressor, I'm glad this is only for emergencies, had almost forgotten what a PITA it is to hand pump.

The one I bought on eBay last month,identical to these had the same issue. Unscrewing the handle/cap, cleaning inside the cap then oiling with Pure silicone oil and placing a small amount of silicone grease on the shaft cured it. I think the air intake was clogged somehow.Mine came in today now I have three backups

well two and a half the Umerex pump is more like half.

LegionAir · « **Reply #41 on:** February 14, 2021, 12:29:37 AM »

Really surprised at the bang for the buck with this pump. I have a huben hand pump that cost 10 times more but they both require about the same strength to use. The huben is built better but is way overpriced.

I tested this cheap pump on one of my 250 bar(3650 psi) guns and it was surprisingly not that difficult.

Was so impressed with this budget pump I went back to buy a few more and they raised the price by more than 50%!($47). Still a good price but I don’t like paying more when I just paid $30 lol

Martis 1 · « **Reply #42 on:** February 14, 2021, 01:20:55 AM »

I started a thread about this a year or so ago, as my Benji pump not only gave up the ghost after a couple years, but rusted internally and pumped enough moisture into my Disco and M-rod to cause some serious damage. Many folks on here told me to buy a cheap Chinese pump, but being stubborn, I invested in a Hill MK4, thinking that quality was worth it. That pump worked great for about 2 months of very careful use, then started leaking. I set it aside, along with my two now rebuilt PCP’s and did my pest control with a Benji 392. A couple days ago I brought the Hill in. I looked online but couldn’t find anything telling me how to rebuild the MK4. I carefully took it apart, cleaned it up, but couldn’t find the source of the leak. Lubed it up and put it back together. Still leaks. I ordered and just received a $60 Chinese pump from Amazon. It arrived today. After assembly, it worked nicely to fill my M-Rod from 2,000-3,000 psi.

I E-mailed Airguns of Airizona regarding the Hill. They said it has a 5 year warranty, (wish I’d bothered to read that...), and I could send the Hill to them. However, if they determine that I did any damage when I took it apart, there is a minimum $180 repair fee! That alone equals 3 Chinese pumps. They kindly gave me a link to Hill’s website, where apparently I can find the info needed to repair my pump. I’ll tackle that this spring...

Hindsight, I should probably have just gone with the cheap Chinese pump in the first place.

Martis 1 · « **Reply #43 on:** February 14, 2021, 02:20:12 AM »

Quick question for those that have them; some of these Chinese pumps, like mine according to the manual, have water in them to keep them cool. Anybody have problems with this getting into the gun? Also, when it comes time to rebuild a “water cooled” pump, do you put water back in, or just run it dry?

Duane38 · « **Reply #44 on:** February 14, 2021, 03:02:31 AM »

Quote from: Martis 1 on February 14, 2021, 02:20:12 AM

Quick question for those that have them; some of these Chinese pumps, like mine according to the manual, have water in them to keep them cool. Anybody have problems with this getting into the gun? Also, when it comes time to rebuild a “water cooled” pump, do you put water back in, or just run it dry?

The water, or mystery liquid, is between the walls and does not afford opportunity to get into the air stream. I dumped it upon a complete tear down and reassembly when I got it to inspect it; put antifreeze back into it.

Used the daylights out of it with no issue or rebuilds. The tubes are stainless, slightly magnetic type. I don't see them ever rusting or corroding. The internals are highly polished too.

For the money and build quality, any other pump is a waste of money, seriously. Just overpriced with metal that is coming from China to make them anyway.

I've filled 13ci bottles from empty well over a hundred times with it without issue. The gauge on mine differs about 200 psi from one bottle, and maybe 100 psi on another.

Mr.P · « **Reply #45 on:** February 14, 2021, 03:43:24 AM »

This is a case where the "pay once, cry once" justification for buying a luxury priced item would steer you wrong. Something to think about with airguns too... or is that totally different?

Duane38 · « **Reply #46 on:** February 14, 2021, 04:55:58 AM »

Quote from: Mr.P on February 14, 2021, 03:43:24 AM

This is a case where the "pay once, cry once" justification for buying a luxury priced item would steer you wrong. Something to think about with airguns too... or is that totally different?

Proof is always in the pudding. Regardless where an item is designed and/or made, a good product can be had.

No escaping the China angle. Their hands are on more than 50 percent of items in all U.S. homes or personal possession. At times they make a great product.

Purchased a Hill several years ago... Went bad in a few months. Rebuilt it. Bad again in a few months. Sold it on a forum. Purchased a scuba tank.

In fact, owned several pumps. Benji, Airforce, Hill, now this "Bull" pump. This has been far superior.

Jumped right in at 40 dollars thinking it's only 40 dollars. Not disappointed what so ever.

Martis 1 · « **Reply #47 on:** February 14, 2021, 12:05:21 PM »

The water, or mystery liquid, is between the walls and does not afford opportunity to get into the air stream. I dumped it upon a complete tear down and reassembly when I got it to inspect it; put antifreeze back into it.

Antifreeze? Never would have thought of that. Obviously it works! Do you think the pump would function properly if it was just left dry after a rebuild?

Firewalker · « **Reply #48 on:** February 14, 2021, 12:19:41 PM »

The watery milky fluid in mine smelled exactly like cutting fluid from a CNC mill. I dumped it and used a 50/50 mix so I could store it cold if need be.

Duane38 · « **Reply #49 on:** February 14, 2021, 01:14:49 PM »

Quote from: Martis 1 on February 14, 2021, 12:05:21 PM

The water, or mystery liquid, is between the walls and does not afford opportunity to get into the air stream. I dumped it upon a complete tear down and reassembly when I got it to inspect it; put antifreeze back into it.

Antifreeze? Never would have thought of that. Obviously it works! Do you think the pump would function properly if it was just left dry after a rebuild?

Have doubt that the fluid works to cool it, or at least take longer to heat up over nor having it. If just air between the walls, remember that air is a great insulator. The inner stage would get hot much more quickly and have a longer cool down time.

I used a pre-mix antifreeze solution to replace factory fluid.

Really do like this pump. Glad to see someone bring it up.

Rick67 · « **Reply #50 on:** February 14, 2021, 01:29:22 PM »

I bought this particular pump about 3 days ago from Amazon (Prime):

I appears to be well-built and solid, albeit almost 3x the price compared to the usual cheap pumps.

It is now out for delivery

JimD · « **Reply #51 on:** February 14, 2021, 02:46:52 PM »

In only have experience with two pumps, a benjamin my kids bought me and a chinese one that cost about 1/3 as much I got after buying an Avenger that can be filled to higher pressure than the benjamin achieves. They both are working fine but the chinese pump is in most ways nicer than the benjamin despite the lower price.

In general I tend to buy cheap items and sometimes end up up-grading later. But not this time. I might buy a compressor or bottle but for hand pumps I will stay with inexpensive chinese pumps - if I ever need a new one.

Duane38 · « **Reply #52 on:** February 14, 2021, 03:24:58 PM »

Sorry, my post above should read "Have no doubt..."

Rick67 · « **Reply #53 on:** February 14, 2021, 07:15:07 PM »

USPS delivery on a Sunday

Nomadic Pirate · « **Reply #54 on:** February 14, 2021, 08:52:30 PM »

Yeah, when I got my 1st Chinese pump as a review to go with the 3600 psi Slayer I wasn't expecting much having been used to the 300 bucks HILLs but I was immediately shocked at how well it worked,

I then just let my HILLs slowly die not even bothering to get new re-build kits since they where just about the cost of a new Chinese pump.

Rick67 · « **Reply #55 on:** February 15, 2021, 01:10:26 AM »

So I got my GX pump today.

It is nice and a quality piece:

This is my 1st hand pump and I am wondering why the hose's tip/fitting does not connect to my 17xx fill probe; it does but it is loose and does not touch the O-ring (about 3mm or so gap) within the hose's fitting:

It says 8mm quick connector:

From Amazon:

Specifications: General Output nut: M10*1 (not G1/8) , 8mm wide use quick connector, Max pressure : 310 bar or 4500 psi, Light weight 3.1 kg, Portable size: length 62cm/24.5inch closed, 105cm/41.3inch open

The brass part has a concave interior to mate with the convex of the steel (they were screwed so tight I buggered the hex brass

):

I am not too sure if this is the part that I need to purchase to make it work:

https://www.pyramydair.com/product/air-venturi-foster-female-quick-disconnect-to-1-8-bspp-male-5000-psi?a=4926

I am really irritated that it did not come with adequate fittings, hence I want to return it for this very reason, although the pump itself is really nicely manufactured.

There is nothing flimsy about it at all.

Help needed, gents

Thanks!

tracker1955 · « **Reply #56 on:** February 15, 2021, 10:02:27 AM »

It doesn't appear to be NPT thread so may be BSPP or metric, odd too that it is almost like flair for gas or specialty thread for high-pressure gasses. Definitely an odd connection compared to most, I'd bet made outside the US for sure though. Sorry not much help, maybe someone more familiar with that type thread seal will jump in.

Firewalker · « **Reply #57 on:** February 15, 2021, 10:03:47 AM »

Rich, I'll go ahead and say it, return it and get the 25 buck one from Amazon.

Rick67 · « **Reply #58 on:** February 15, 2021, 10:21:14 AM »

Thank you for the prompt replies, dear sirs

Mr. Dave, I do plan on returning it tomorrow but I also emailed the seller (Ankul via Amazon) last night and got an expeditious response this morning as well.

Oh, I did order this one last night:

It is only $25, so no brainer, lol!

This GX is really a well-made product and heavy

FuzzyGrub · « **Reply #59 on:** February 15, 2021, 10:27:11 AM »

Rick,

Nice looking pump. Like the filter and is similar to a design in my head.

Mine was longer, though.

I think it is common to find some miss-match between the china 8mm fitting and "foster" fittings. I have some connections that I really have to push on to get the ball bearings to snap back behind collar. Did you try it on any other male fosters?

It is M10, not npt or bspp. Most of the china hoses use m10.

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PCP Hand Pumps

Author Topic: PCP Hand Pumps (Read 6143 times))

Nomadic Pirate