Nuoge Compressor

I came across a Nouge compressor. It is very similar in construction to the Hatsan Spark except for the power input terminals. Does anyone have any info on the specific model, perhaps a manual?
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@Normkel I would appreciate any info. Also, I would like to know what O-rings are required for rebuilding, if you have that information.
I am experiencing some health issues so please excuse that I may not be as prompt as we would prefer.

Here are some photos of the Nuoge. The gear reduction and electric motor appear to be the same as my GX CS3 but I did not disassembly both at the same time to try to swap parts.

I have more internal parts photos if you would like. I'm pleased to put these out there if they are of interest.

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At the time, with shipping, it wasn't that much different in cost to order the complete compressor cylinder assembly from AliExpress, so I did that.

I have a spare and some other parts in case mine, or an acquaintence has a failure.

My Nuoge is a backup for my GC CS3 which I use at the range to fill my PCPs. I give the Nuoge some excercise from time to time.

One day per week at the range, typically 6-7 hours, with 80 mile round trip means that I don't want to be stuck for lack of air.

Is there more information that I might be able to provide?
 
@Normkel Thank you very much for taking the time to do this! Are there O-ring kits that can be purchased for maintenance, or do just match them up when service is required?
They use "Teflon" rings as piston seals the orange arrow identifies where the front, high-pressure piston seal melted in this Tuxing. The owner was using it to fill some large bottles and it finally melted some parts

IIRC, I have ordered some piston seals for others so should have information. I will look tomorrow.

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There are variations but this video should give a good impression of what is involved in servicing one of these.

*NB. I have disassembled mine and my GX CS3 gear box in order to remove the strange grease, that looks like peanut butter, and replacnig with a good quality grease NLGI #2, GC-LB.

I happen to use a product by Lucas Oil Products Red "N" Tacky Grease, not because it is magic, or nothing else will do, but because I have used this product successfully for decades. Any equivalent grease by a quality lubricants company will serve as well, IME.