abandoned compressor on the sidewalk. found and fixed. Lets go into it and see what coin it cost to fix it. We will go over these sections:
- initial troubleshooting:
2. disassemble compressor, piston and valves.
3. deep t-shoot and run tests:
4. bill of materials:
First here are some pictures, it looked worse when I found it. this is cleaned, greased and siliconed. Sorry that dog follows me everywhere and got in the picture:
- initial troubleshooting: unit cycles and motor works. air inlet has more air coming out than going in!! valves must be stuck!
2. disassemble compressor, piston and valves. Easy disassembly except to split the compressor head, the gasket had it stuck pretty good. Massive dirt in the intake section apparently from a wasp or something that made a nest inside the piston head!! The air filter was lost so the insect easily climbed into the cylinder head and had a nice private residence. The intake and output reed valves made of stainless steel and aluminum. Carefully remove gunk using aluminum scraper and scrub brush. Remove old gasket and replace with liquid forma gasket. Silicone on the rubber parts.
3. deep t-shoot and run tests: After 60 minutes of time to set the form a gasket material, I bolt the compressor head and silicone the piston. Piston uses rubber o-ring material in a aluminum piston liner with some type of anti-friction coating that is rubbing off in some parts. Test it! I get it to 100 psi and then bleed the air as I use the air to clean out some areas in the shop. I am afraid to go higher PSI until I do more inspection. I believe max psi is 125 psi on this unit, and it should auto shutoff at that pressure. I want to see if that auto-shutoff is working, but patience. I need to check other things. I bleed all the air, then on to test #4. Another run test. About 15 minutes and I am thinking this compressor is good to go! It is holding pressure with no leaks!! Let me completely reassemble. I clean it and about to put it back together. . . .then I think, hell no. I am going to do another run test. AHHH! Runs for about 3 minutes. . . But no, about then, the running the unit just – stops!
Able to get it running again but the motor is not going full speed. Shutdown and restart. Now motor full speed. Another run test. About 90 psi and 5 minutes of run the motor stops again! Why? Piston moves easy, its the motor. Now the unit will not run at all! What happened to the motor? It was just working!! Its not that hot. This GE motor has a thermal reset. There is a warning that it can reset automatically and beware. It is not that. What else? I remove both capacitors. The start capacitor obviously damaged with dielectric dripping out. To be sure I order the run capacitor also.
4. bill of materials:
90 minute black gasket $17.00
o-ring $1.00
silicone $1.00
starter capacitor $12.00
run capacitor $9.00
Used Grainger.com capacitor selection guide to find the right capacitors. go here:
Hope this guide helps you troubleshoot your air compressor.
Copyright 2024 Rod Deluhery
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