GX CS4 add water to grease pot??

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Buck_Wild

Member
Feb 27, 2020
38
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NY, United States
Hi everyone! My CS4 has been a workhorse for the last 50 hours of run time up until the weather got cold. Now that the temperature dropped and the unit is in my garage, when turning it on it pumps very very slowly. I cleaned the check valve located underneath the burst disc as well as the check valve located in the steel pipe coming from the head to no avail. I found a video from Jason at GX that recommended to add water to the grease pot to flush out any debris or possibly excess grease from the internal check valve located within the high-pressure piston (which requires disassembly to clean or replace)

Has anybody tried this method yet and what were your results?
 
The grease pot is for grease only to lube the piston. Why on earth would you want to put water in there and get water into the system where it shouldn't be. The only place the water should be is in the cooling tank to cool the compressor heads. Just cause you see someone doing something doesn't mean you follow. Monkey see monkey do lol
 
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Well, after letting the compressor run in its current state for about five minutes I removed the check valve underneath the burst disc and to my surprise water droplets were being pushed out. There’s water in there to begin with due to compression.

I, like you, had the same train of thought of why in the world would you put water in the grease pot?

I haven’t tried it, but I’m curious if anybody else has.
 
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Ta Ta…. it was your thread that I read extensively and you had one member poo poo the idea for about five pages long without understanding how the unit works. He was under the impression that the crank and bearings get greased from the grease pot. Anyone who has searched for teardown videos, will quickly understand that it is completely impossible to grease the crank and bearings from the grease pot.

As for now, I run the compressor without the check valve installed for 10 minutes to warm it up then I turn it off, reinstall the check valve and the machine starts to pump normally.
 
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I have done this and it worked. Mine was slowing down quite a bit and after watching Jason's video, I gave it a try and after it was back to pumping like when it was new. I suspect too much grease gets into the works and this cleans it out so you can start fresh. I also thought it sounded a bit counter productive, but like I said, it actually worked for me.
 
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Buck_Wild said:
Hi everyone! My CS4 has been a workhorse for the last 50 hours of run time up until the weather got cold. Now that the temperature dropped and the unit is in my garage, when turning it on it pumps very very slowly. I cleaned the check valve located underneath the burst disc as well as the check valve located in the steel pipe coming from the head to no avail. I found a video from Jason at GX that recommended to add water to the grease pot to flush out any debris or possibly excess grease from the internal check valve located within the high-pressure piston (which requires disassembly to clean or replace)

Has anybody tried this method yet and what were your results?
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if that is the way it should be flushed, they would have stated that from the company who makes the compressor.
Remember the old saying, they mix like water and oil all i see is black death for that compressor coming from adding water to a grease port.
old school bad idea.
 
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The cs4 lives to pump another tank! The original burst disc blew right before adding water to the grease pot, go figure! So I replaced it with the spare discs provided and they all burst around 3,500-4,000 psi. So I reached out to gx and asked for “less than 40 Mpa” burst discs. The package arrived several days ago. I installed the new disc, removed the grease pot, and added water. After performing the procedure several times my compressor is working perfectly again 🤘🤘🤘

I just refilled a 60 minute tank and (2) empty 30 minute tanks without a hitch.
 
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88turbocoupe said:
if that is the way it should be flushed, they would have stated that from the company who makes the compressor.
Remember the old saying, they mix like water and oil all i see is black death for that compressor coming from adding water to a grease port.
old school bad idea.
Click to expand...
I heard that if your car or truck is burning oil it is recommended that you put 9 oz of Listerine (original, not minty) into the crank case.
It does not stop the oil burning, just makes it smell good
 
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Idk I feel like people are :poop:ing on this but if it works, it works. @Buck_Wild, please follow up here as time goes on so it can be determined whether it caused an issue or if it degrades some internals in any way to know whether this is hogwash or worth a shot to others who may be experiencing issues.

However I think what makes by far the most sense is what others have recommended which is to store it inside the house and then bring it outside when ready to actually use it.

It may have been that the cold just exacerbated an underlying issue though
 
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I filled up 3 SCBA tanks after flushing the cs4 with water. I didn’t have a working compressor and now I do. To me it was worth a shot since I didn’t have a running compressor, it’s under warranty and I have email confirmation from gx to flush the compressor using the method they described.

As for storage, I do believe the cold weather exacerbates the issue but my cs4 was already acting up and would not pump properly in a 75* room let alone a 35* garage. After performing the flush all is working well. It’s your money, it’s your machine, do as you please. At least I have a running compressor again 👍

So far, two of us have tried it and it worked. Feel free to message me in a few months to see how the cs4 is running.

We plan on buying a bigger compressor in a month or so and the cs4 will be a backup. At that point I will fully disassemble and rebuild it with pics.
 
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Buck_Wild said:
I filled up 3 SCBA tanks after flushing the cs4 with water. I didn’t have a working compressor and now I do. To me it was worth a shot since I didn’t have a running compressor, it’s under warranty and I have email confirmation from gx to flush the compressor using the method they described.

As for storage, I do believe the cold weather exacerbates the issue but my cs4 was already acting up and would not pump properly in a 75* room let alone a 35* garage. After performing the flush all is working well. It’s your money, it’s your machine, do as you please. At least I have a running compressor again 👍

So far, two of us have tried it and it worked. Feel free to message me in a few months to see how the cs4 is running.

We plan on buying a bigger compressor in a month or so and the cs4 will be a backup. At that point I will fully disassemble and rebuild it with pics.
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I guess if its a what do you have to loose situation then what do you have to loose ? Then it worked.. 😆 👍
 
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