I am posting this here as well, looking for some advice.
I love my shoebox compressor, but I am having some issues lately. It stopped making high pressure earlier this summer. I think that some of the lithium white Grease got inside and gummed it up. I bought a rebuild kit and it worked fine for about 2.5 60 minute tanks. The lubing felt kept spitting out, though. I suspect that I need to replace this felt. Any one know its specifications? I am on my way to the hobby store this afternoon.
Anyway, about a month later I needed to fill my tanks again and could not build pressure above about 3200psi. So I went to rebuild it again. There was some black graphite looking gummy stuff in the low pressure cylinder. I suspect that it was some aluminum and the delrin spacer grindings. During the last lube, I really cleaned everything well and only used silicon oil and ultimox to lube it. Any idea what this is or what I did wrong?
This time I only use silicone oil for lube and some new synthetic felt. The felt did not stay in, but I made sure that the pistons were lubed before startup. I got the pressure up to 3200psi and let it sit over night. No leaks! I restarted this morning and just about got my pony bottle to 4500 psi and then the high pressure line blew out. I was able to rescue the bottle at 4000 psi. The tubing came loose out of the back fitting. I am not sure how this fitting seals, but after a bit of fiddling I got it back together with the oring and black washer. Does anyone know if there are tolerances for how far the ss tubing is supposed to stick out? I have not tested it yet. But running the piston by hand seems like there is a bit of rubbing on the upper /low pressure piston. I am not sure what could be rubbing, as the piston runs on the orings. Maybe rubbing between the delrin spacer and the other aluminum cylinder. Should I try it again or contact shoebox folks?
Thanks for any advice.
Dan
I love my shoebox compressor, but I am having some issues lately. It stopped making high pressure earlier this summer. I think that some of the lithium white Grease got inside and gummed it up. I bought a rebuild kit and it worked fine for about 2.5 60 minute tanks. The lubing felt kept spitting out, though. I suspect that I need to replace this felt. Any one know its specifications? I am on my way to the hobby store this afternoon.
Anyway, about a month later I needed to fill my tanks again and could not build pressure above about 3200psi. So I went to rebuild it again. There was some black graphite looking gummy stuff in the low pressure cylinder. I suspect that it was some aluminum and the delrin spacer grindings. During the last lube, I really cleaned everything well and only used silicon oil and ultimox to lube it. Any idea what this is or what I did wrong?
This time I only use silicone oil for lube and some new synthetic felt. The felt did not stay in, but I made sure that the pistons were lubed before startup. I got the pressure up to 3200psi and let it sit over night. No leaks! I restarted this morning and just about got my pony bottle to 4500 psi and then the high pressure line blew out. I was able to rescue the bottle at 4000 psi. The tubing came loose out of the back fitting. I am not sure how this fitting seals, but after a bit of fiddling I got it back together with the oring and black washer. Does anyone know if there are tolerances for how far the ss tubing is supposed to stick out? I have not tested it yet. But running the piston by hand seems like there is a bit of rubbing on the upper /low pressure piston. I am not sure what could be rubbing, as the piston runs on the orings. Maybe rubbing between the delrin spacer and the other aluminum cylinder. Should I try it again or contact shoebox folks?
Thanks for any advice.
Dan
