Portable air compressors

Update. Compressor was fine today. worked like it has been no hanging up.

The only thing I can think of is i had my gear upstairs (78f) because i had it at a friends house. Took gun and everything down to basement (55f) then right outside (39f) and started shooting and filling immediately. Maybe the Temp differential affected things?

I had left everything in basement yesterday so there wasn't a big temp swing today.

Thats the only thing i can think of?

I've had the Spri-Tech since last Sep. Been using it to fill from 110 - 250 Bar gun, 3 times a day/once a week on my weekly range visit. Been making sure to treat it with silicon grease/oil wherever needed. So far so good. I do have a question tho:

Dees anyone have any experience with using this compressor to fill a 580cc/300Bar gun? Im considering upgrading mine from 480cc-580cc, just wasn't sure how this compressor would handle the extra load?

Thanks guys.

I've had the Spri-Tech since last Sep. Been using it to fill from 110 - 250 Bar gun, 3 times a day/once a week on my weekly range visit. Been making sure to treat it with silicon grease/oil wherever needed. So far so good. I do have a question tho:

Dees anyone have any experience with using this compressor to fill a 580cc/300Bar gun? Im considering upgrading mine from 480cc-580cc, just wasn't sure how this compressor would handle the extra load?

Thanks guys.

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I will when my tanks get here. I hope someone has tried already and can chime in though.

I have a yong Heng on its way and a 74 cufoot tank also. So I'm covered either way. If the online calculators are right, ill only get a few fills at the higher pressure with the tank. But the extra shot count hunting or shooting away from an air source should come in handy!

The rbuild kit for these air cooled portable compressors came in, I'm going to order another one, I'm not sure if this rebuild will last long or not. 

I thought the split rings were the ones going to be replaced but those aren't part of the kit. It comes with o rings and the solid wear rings. I replaced all 3, a small and large ones in the compression area and a medium size one that the pump rod goes through. I also replaced the check valve that has the spring on it. The kit has other pieces that as far as I can tell aren't in my compressor.

The small ring in the compression area was deformed when I originally took the pump apart and I assumed it was due to use but I don't think so now. These rings deform when you installl them and the outer diameters seem to be a few thousanths too large. The ring deformations go away. I had to force the pump pieces to go over these new wear rings which didn't treat them too nicely. The small one deformed almost identically to the one I took off and the large one had a piece knocked off of it. All of them got shaved by the metal pieces going over them. 

I'm not sure why but o rings are used underneath the wear rings, I replaced those also. I was able to use silicone 'grease' on the pump shaft this time like he recommended. Honestly with the 'chunk' taken out of the large ring (enough came off that I can see the o ring under it) I was expecting to have to take it back apart and put the old rings back on until a new kit came in. 

I'll lightly, slowly and carefully sand down the next set of rings so they won't get so damaged next time.

I was pleasantly surprised that it worked and pumped well. I'd say pumping time sped up more than I expected it to, wild guess I'd say about a 25% increase and the temp stayed much lower the whole time also, previously at 10 minutes it was hitting 100 deg F (38 C) but this first time after the new rings were put in it never got over 89 F (32 C).

After the original cleaning/lubing I was pumpinging 300 psi each time hitting 38C at 10 minutes. Now after the new rings it pumped a good 1000 psi (2800 to 3800) in 10 minutes and only hit 32C.

Since I had recently cleaned and lubed it, I bought a long T handle 4 mm hex head and this allowed me to reach in and unscrew the 4 bolts holding the pump in. A regular allen wrench can reach the two bolts that hold the pump shaft to the motor. 

This let me take only the pump out without having to unbolt the entire motor/pump assembly. 

***I should also mention the 10 minute time period is for a 68cc ninja tank which is twice the size of the standard 3K airforce condor bottle. I haven't filled the gun bottle yet on the new rebuild.

I have the GX CS2 Air Compressor that runs of 12V battery source, i.e. a car battery. It takes it about 4 minutes to take my Marauder SAM from 0 to 3000 PSI. Normally though I add air when the rifles get down to 2000 PSI. Not very loud and I run it without earmuffs in my office so no worries about noise outdoors. It has a pressure gauge but I use the gauge on the rifle which is a more accurate reflection of the pressure in the rifle's air chamber.

I like that one Carlson. If I have to buy another one I'll probably get that one. I was able to fill my gun bottle yesterday before shooting, the rebuild definitely improved the pumping time. I don't remember it going up in psi as fast before, it's probably like car brakes though, they takes so long to wear out that you don't notice how bad they are until it gets really bad and it's been long enough to not remember how good they were to begin with