New compressor?

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   I sold my GX CS4i today. It was quite OK, and did the job. Was a great wee pump.
But...I really didn't need the high psi it provided (5500psi) when I only need 3200psi. Plus I wanted more air flow (to charge quicker so I can fill mates cylinders too).
Thought about this over the last few weeks.
Think I'm ordering a Hills Evo 310 tomorrow. They do make one that only goes to 210 bar which would be fine (for now). But maybe one day I'll get a high power PCP, and then I'll need the 310 bar jobbie.
Can't find a Hills Evo in NZ or Aussie.
The Aussie agent will take the money and have the Hills delivered from UK to me in NZ, but it's cheaper for me to deal direct with Hills UK.  
Thought I had a rerfurb Coltri sorted but very hard to pin down a delivery date, shipping cost, and if the pump had any fittings attached/supplied with it. Too hard, and wasted 3 - 4 weeks over it already.
Gave up, too hard...will get a new Hills instead.
Or...any other ideas before I pull the pin tomorrow?

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Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 71	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Topic: New compressor? Posted: 16 Jul 2025 at 8:42pm
	I sold my GX CS4i today. It was quite OK, and did the job. Was a great wee pump. But...I really didn't need the high psi it provided (5500psi) when I only need 3200psi. Plus I wanted more air flow (to charge quicker so I can fill mates cylinders too). Thought about this over the last few weeks. Think I'm ordering a Hills Evo 310 tomorrow. They do make one that only goes to 210 bar which would be fine (for now). But maybe one day I'll get a high power PCP, and then I'll need the 310 bar jobbie. Can't find a Hills Evo in NZ or Aussie. The Aussie agent will take the money and have the Hills delivered from UK to me in NZ, but it's cheaper for me to deal direct with Hills UK. Thought I had a rerfurb Coltri sorted but very hard to pin down a delivery date, shipping cost, and if the pump had any fittings attached/supplied with it. Too hard, and wasted 3 - 4 weeks over it already. Gave up, too hard...will get a new Hills instead. Or...any other ideas before I pull the pin tomorrow?

Mintie Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 18 Feb 2017 Location: Hawkes Bay Status: Online Posts: 90	Post Options Post Reply Quote Mintie Report Post Thanks(1) Quote Reply Posted: 18 Jul 2025 at 1:18am
	Honestly I've been running a Yong Heng for the last few years now and it has been fantastic, it fell off the bench when I first got it (my own stupid mistake) so I purchased a second one expecting this one to fail but it has been 100% reliable, and I've put a fair bit of use on it. Landed they are about $1000.

Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 71	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Posted: 18 Jul 2025 at 9:21am
	I did look at the Yong Heng, and also considered the Tuxing twin cylinder job. But some of the reviews had me worried. Things such as folks keeping a 2nd YH on hand in case the first one blows up again, etc. It seems that with China made you might get a good one, you might get a dodgy one. Bit of a crap shoot. But the Hills just seem to be good straight out of the box. Edited by Grey Kiwi - 18 Jul 2025 at 9:23am

Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 71	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Posted: 18 Jul 2025 at 5:56pm
	Thought about it all overnight. Ordered the Hill Evo 310 today. It will outlast me for my projected future shooting life, and then I can sell it on here to one of you (maybe 8 years time!). It will be a lot less drama for me compared to the CS4 as no water cooling, or grease pot worries now. Hope I made the right move?

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1714	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 19 Jul 2025 at 10:55am
	I was keen on a hills, and a local gun shop was considering being an agent, but never did so I got a GX cs4. Prior to that I had a nomad 2. If I wasn't capable of taking it apart to repair it, it would have crapped out on me a long time ago, but I made the repairs and it kept running. The nomad is still running for the new owner. It's things like check valves that cause issues.

Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 71	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Posted: 19 Jul 2025 at 11:48am
	Same with the GX CS4i. You have to keep the check valves clean on them too. The Evo 310 is similar to the CS4 in that it uses silicone oil to lube the piston (the CS4 uses silicone grease and 'eats' that during use). The Evo 'eats' the oil during use, but sparingly. It also has the same idea of silicone rubber 'rings' as the CS4 does. For me the slightly greater air output and less high pressure are fine. I only go to 200 bar on the 9015. Ask me in 5 years time if I'm still happy. I'll only be 83 then, so will be still around and kicking.

Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 71	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Posted: 29 Jul 2025 at 4:46pm
	Well...it arrived today. Certainly looks to be a well made unit, and more than a tad heavier than the CS4i (well...it's about twice the weight so I won't be taking it around to the range any time soon). Looking forward to trying it tomorrow (the 9015 needs some more puff now).

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 04 Nov 2022 Location: Stratford Status: Offline Posts: 420	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: Yesterday at 3:36pm
	How's that Hills compressor performing Grey? I'm getting a bit fed up with my Tuxing, looks like the high pressure rings have gone again. Last time I used it to fill my bottle it managed 310 Bar, but today it wouldn't go higher than 220. The rings were replaced only two fills ago after the coolant pump failed and cooked the last set. If I wasn't capable of fixing the damned thing myself it would have long gone!
	Daystate Red Wolf .22 FX Dreamline .22 Diana Outlaw .22 AA S410 .22 HW98 .177 HW30 .177 Diana 340 E-Tec .177 FWB Sport 124 .177 Gamo 900 .22 Baikal IJ-22 .177 Crosman 2240 Custom .22 Brocock GP .22

Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 71	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Posted: Yesterday at 5:37pm
	The Hills is going great. I'm very happy with it. I did add another cooling fan (they are air cooled). There was no real need right away to add more cooling but thought that maybe one day I'd also buy a tank. I have taken it around to the range a couple of times...not too heavy and fits OK in the boot of the wee Suzuki Fronx. It is a bit faster at pumping than the GX CS4i I had too. Spendy...but I'll recoup a lot of that back one day when I sell my gear. Extra fan as per photo. Runs off a wall wart.

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 04 Nov 2022 Location: Stratford Status: Offline Posts: 420	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 6 hours 35 minutes ago at 4:25pm
	That's good to hear. I took a look and a it's a bit more than I want to pay at this stage so I'll soldier on with what I have. Pulled the top off again and yes the rings are toast. Also, no lube visible so it looks like I have two issues. First, the 'superior' copper infused aftermarket rings are rubbish so I've ordered more of the genuine parts. Second, I'm using fully synthetic 20w50 motor oil in place of the ISO100 synthetic (which is crazy expensive) and it doesn't appear to be getting past the lower ring set to the high pressure section. I fitted a new set of the 'special' rings lubed in silicon oil and managed to fill my bottle to 240 Bar before it slipped back to 170 (one-way valve in fill line). Turned the compressor off and the pressure held on the display, so no leaks. Must be rings again (sigh.....) My plan is to fit the new rings when they arrive again lubed in silicon oil and squirt a small amount into the low pressure intake each time I use it. If that doesn't work, I'll have to take out a mortgage to pay for some more ISO100. Edited by KiwiTR6 - 6 hours 34 minutes ago at 4:26pm
	Daystate Red Wolf .22 FX Dreamline .22 Diana Outlaw .22 AA S410 .22 HW98 .177 HW30 .177 Diana 340 E-Tec .177 FWB Sport 124 .177 Gamo 900 .22 Baikal IJ-22 .177 Crosman 2240 Custom .22 Brocock GP .22

Grey Kiwi Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Jan 2022 Location: Richmond Status: Offline Posts: 71	Post Options Post Reply Quote Grey Kiwi Report Post Thanks(0) Quote Reply Posted: 6 hours 18 minutes ago at 4:42pm
	Well, I'm guessing that in the long run the proper oil will be cheaper than putting in new rings all the time? This sort of thing is what drove me to the Hills (although the CS4i had given me no trouble). The Hills uses a proprietary silicon oil too. But only needs changing after 50 hours, and I can get it from an Aussie dealer...no need to get it in from the UK. This stuff for the pump internals...it uses a wee drop of oil each time you run it. Might work for you too? https://huma-air.com/silicone-oil-for-the-hill-ec-3000-evo-310-compressor/

Mintie Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 18 Feb 2017 Location: Hawkes Bay Status: Online Posts: 90	Post Options Post Reply Quote Mintie Report Post Thanks(0) Quote Reply Posted: 2 hours 58 minutes ago at 8:02pm
	TR6 - there is a very cheap Yong Heng on trademe at the moment, I already have 2 so no need for it. Pickup only though which might be a hassle. https://www.trademe.co.nz/a/marketplace/sports/hunting-shooting/other/listing/5866766366?archive=true

KiwiTR6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 04 Nov 2022 Location: Stratford Status: Offline Posts: 420	Post Options Post Reply Quote KiwiTR6 Report Post Thanks(0) Quote Reply Posted: 2 hours 1 minutes ago at 8:59pm
	Thanks Mintie but I have a 10L carbon bottle and the Yong Heng is undersized for that. However, that said, I have one on the way to act as a spare for the one we currently have at our club which is quite old and has been faultless really. The only problem with it is internal corrosion of the steel fittings but parts a very inexpensive so not a big deal really. We also have a big Tuxing and it has been pretty good as well. I suspect mine was a lash-up job from used parts as the low pressure inlet reed valve shattered early on and did a lot of damage. I've been battling with it ever since but I'm not yet prepared to give up on it. Also, silicon oil is on its way for regular addition after the new rings are fitted. Its a pity is that Yong Heng don't appear to make a large version to match the capacity of the Tuxing. If they did then it would be my replacement choice .
	Daystate Red Wolf .22 FX Dreamline .22 Diana Outlaw .22 AA S410 .22 HW98 .177 HW30 .177 Diana 340 E-Tec .177 FWB Sport 124 .177 Gamo 900 .22 Baikal IJ-22 .177 Crosman 2240 Custom .22 Brocock GP .22