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.
