Issues with brand new GX CS4 compressor

[L.Leon]

@sobdiver, what a run around. Posts like yours about the GXs is what made me stay away. They seem to be a hit or miss proposition, you have gone above and beyond as a consumer. The time you put in makes it no bargain at all… I went through a “first” compressor and did not want to go through a second. Which is why I now own a Daystate Super Legerro. There was an ad recently in the classifieds where a user had gone through seven, seven! Compressors, all of which needed some repairing. He was selling them all at a bargain price. Some of us have zero time for trouble shooting.

 

[Airgun Al]

My last dead head test to 300 bar went up to 2 minutes 50 seconds. Prior to flushing with water I removed the check valve and cleaned out the gunk, and ran for an hour, per their instructions. After flushing with water I removed the check valve again, was clean, but running compressor blew out the remaining H20. They sent me a video on how to tear down the cylinder so I could clean the piston. I said that was too much, I’ve done enough and want a warranty replacement, they replied to do the water flush again, I replied that I already did a thorough flushing and I want a warranty replacement, they replied to inspect the spring in the check valve and make sure in the right direction and replace with spring in kit if it’s weak… They appear very resistant to do a warranty replacement without taking me through the ringer. Right now I’m out of town and can’t check the spring, but I would be shocked if that was it. After all my flushing and cleaning, dead head test keeps getting looooonger and looooonger lol.

Can you imagine having transmission problems with your new truck, and the manufacturer telling you to disassemble and repair it yourself?

 

[Trucker3573]

Update:

Did a dead head test last night to 300 bar, took 45 seconds. Just did another one this morning and took 2 minutes 37 seconds! I let it sit for a bit after the test to confirm no leaks and no leaks. This is after meticulously completing the troubleshooting steps from GX support. So, things are back to not working on my brand new unit. Almost all use so far has been troubleshooting

GX doesn’t publish benchmark results for dead head tests, but it should be around 30 seconds from results I’ve seen shared online, several have reported 28 seconds, or faster. So, 2:37 something very wrong.

GX does publish these benchmarks though:
View attachment 572065

GX asked if a had a .5L bottle for testing. So yesterday I removed the 580cc bottle from my crown and put on my 480cc (.48L) bottle for testing. I shot the bottle down to 150bar. I then filled the .48L bottle with the GX CS4 to 250 bar. The fill took 7minutes 18 seconds. The Benchmark data from GX states "0.5L tank from 3000Psi to 4500psi ,only needs 4-5 minutes". 3000PSI(206 Bar) to 4500PSI(310 Bar) is roughly 100 Bar of fill in 4-5 minutes on a .5L bottle You should only fill the FX to 250 bar, so I did a 100 bar fill from 150 bar to 250 bar instead, but mine took 7 minutes 18 seconds. I would have expected the same 4-5 minutes if working properly. Actually maybe faster since my 100 bar of added fill was at a lower pressure range. It was after that that I got the dead head test at 45 seconds and then this morning at 2 minutes 37 seconds. So, the CS4 seems to have taken more of a dump since my bottle test and a new bottle test will likely have worse results. The bottle test is harder to set up, but I’m ready to throw in the towel. My suspicion is that something is wrong inside that piston assembly. I’ve asked for a warranty replacement.

Did you have any additional filter inline? That is about what mine takes with the new gx filter inline to do the same fill. Mine had a dead head of 27-28 seconds.

Actually my bad…that is the time with my cs2 through the gx filter inline. Still doesn’t sound bad for the cs4.