GX-CS3-I question

[MikeyJ]

Hi folks,

I recently bought a new GX-CS3i compressor on Amazon. I did some deadhead pressure testing and noticed that the pressure dropped immediately after hitting the set psi level, even though I hadn’t yet opened the bleed valve. I checked for air leaks but couldn’t find any. Not wanting to mess with a new compressor, I returned it for a replacement, which arrived today. It does the same thing! I sprayed connections, used two different deadhead plugs (I greased both), and I checked the tube connections. They were tight. I can’t find any leaks. I’ve attached a video showing the problem. Is this normal? I read somewhere that if this happens, something is wrong. But on two new units?

Any help would be appreciated!
Thanks!
Mike

 

[Camaro454]

You most definitely have a leak. Make a soapy water solution and spray each connection. I would start with hose/deadhead and work up to pressure gage. Good luck.

 

[MikeyJ]

Thanks. I’ve tried that, but can’t see any leaks.

I have to figure out how to get to the underside of the pressure gage. Everything else is tight.

 

[Rawroots]

Try it on a different gun

 

[MikeyJ]

Try it on a different gun

I didn’t even get to the point of using it with a gun. I was just testing it out of the box.

 

[Avator]

It ain't the gun... mine will do it too. It still fills the gun to the set point and when it shuts off the check valve in the gun's fill port keeps it from losing any pressure. My compressor still fills at an adequate rate.
Thing is, mine only leaks down a couple hundred psi then stops.

 

[Avator]

I'm not saying it's all good and others may not experience it with theirs... I'm just saying I don't worry about it.
It's a great compressor and serves me well.

 

[MikeyJ]

I'm not saying it's all good and others may not experience it with theirs... I'm just saying I don't worry about it.
It's a great compressor and serves me well.

I hear ya. I’ll keep investigating leaks and try not to stress about it. Thanks!

 

[WorriedMan]

Neither good nor normal, compressor will always be working against itself. Two separate GX-CS3s, with same leak, points to common cause. Could just be a batch of bad gauges, these center knob adjustable ones are notorious leakers. Soapy water spray bottle with adjustable spray head on narrow stream works best for me. Don't forget spraying around pressure release valve, too. WM

 

[MikeyJ]

Neither good nor normal, compressor will always be working against itself. Two separate GX-CS3s, with same leak, points to common cause. Could just be a batch of bad gauges, these center knob adjustable ones are notorious leakers. Soapy water spray bottle with adjustable spray head on narrow stream works best for me. Don't forget spraying around pressure release valve, too. WM

I hooked up to a gun, made up a better leak detection solution, and I think I may have found the leak. It seems to be at the bleed valve connection. See photo… the bubbles appear to be coming out of the bleed valve port even though I have the screw well tightened. But there are also bubbles at the nut. I tried tightening that, but it won’t budge. Can you advise me on what to do? Is the nut something I can remove and wrap with teflon tape? I can't get it any tighter than it already is. Thanks!

 

[WorriedMan]

I hooked up to a gun, made up a better leak detection solution, and I think I may have found the leak. It seems to be at the bleed valve connection. See photo… the bubbles appear to be coming out of the bleed valve port even though I have the screw well tightened. But there are also bubbles at the nut. I tried tightening that, but it won’t budge. Can you advise me on what to do? Is the nut something I can remove and wrap with teflon tape? I can't get it any tighter than it already is. Thanks!

View attachment 547080

Don't know GX-CS3 but I'd remove complete assembly by removing nut, no pressure on system, of course, then investigate what seals pressure release assembly to compressor AND pressure-release screw to seal air pressure. A plastic "donut" washer, "O" ring or rubber ball is missing, or defective. Doubt more tightening or teflon tape is answer. WM

 

[MikeyJ]

Thanks!
Problem solved! At least for now. I removed the nut. On the back end of it (behind the little steel ball) is a valve with an o-ring. I cleaned all those pieces, regreased the valve and o-ring, flipped the o-ring over, and reinstalled. No more leaking.

 

[WorriedMan]

Congratulations! Any spare parts bag that came with compressor might have new "O" ring included. Now, enjoy your compressor, Sir! WM

 

[MikeyJ]

Congratulations! Any spare parts bag that came with compressor might have new "O" ring included. Now, enjoy your compressor, Sir! WM

Not that one!
Thank you!

 

[1900colt]

Congratulations! Any spare parts bag that came with compressor might have new "O" ring included. Now, enjoy your compressor, Sir! WM

Glad it worked out!

 

[MikeyJ]

Glad it worked out!

Thanks!!