A Peek Inside the GX CS4 Compressor

Okay, I used my GX CS4 compressor to top of my 6.8L tank the other day and ran it for about 30 minutes or so to top off the tank at 300 bar. As you may have guessed, I’m a tinkerer and am always curious how things work. So, I looked at the CS4, it looked at me and I removed the case.

It’s really easy to do – I removed the little sheet black metal screws that run around the edges of the red sheet metal cover, removed the coolant tank cover, unfurled the power cord wrapped on the spool and the cover just comes straight off.

Here are some photos:

The first thing that struck me was how cleanly it is laid out. The blue lines are the coolant lines – they are that color because the GL48 70/30 mix I am using is blue. It sure makes them stand out – you can see the water intake at the bottom of the fluid reservoir in the middle. The silver hard line is the high pressure air running from the top of the compressor over to the aluminum manifold block that has the pressure gauge assembly and the male foster fitting. Note how all of the machining is well done. Care was taken with the design, machining and assembly of this unit to look like this.

Another angle looking towards the rear of the unit. You can clearly see the cooling lines – if someone needed to trouble shoot a fluid leak, it would be very easy to do.

This is a view from the other side. The grease by the grease pot is my fault. I had removed the pot to look at it and made a bit of a mess. It wiped right off.

Looking towards the front of the unit – those are the switches for the pump to the top left and the mast switch in the middle. You also get a pretty good look at the electric motor.

Summary

The design is well executed – everything is neatly assembled and the pump continues to work great. There are probably over 5-6 run time hours on it so far.

Here are the GX compressors from the CS4 down to the CS1

GX CS4 – 6.8L tanks, fluid cooled, longer run time, 5800 PSI/40Mpa – External 12 volt power supply [My current compressor]
GX CS3 – 1 liter tanks, air cooled, 4500 PSI/30Mpa – External 12 volt power supply [I used this and now my friend has it]
GX CS3-I – 1 liter tanks, air cooled, 4500 PSI/30Mpa – Internal power supply [I used the regular CS3 but they are the same other than the power supply]
GX CS2 – .5 liter tanks, air cooled, 4500PSI/30Mpa – 12 volt or 110 AC [I have not used this one]
GX CS1-I – .5 liter tank, air cooled, , 4500PSI/30Mpa, 12 volt or 110AC internal power supply [I have not used this one]
FastToBuy 30Mpa Oil Water Filter – Not a GX product but I recommend this filter and you need one between the compressor and your tank or PCP airgun. You will need an extra hose from it to your tank or airgun plus the proper fittings.

Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

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