/diy/ - Do It Yourself

I recently came across an old air compressor, but despite the model number and possible manufactures number I can't find much info about it. I'm not to familiar with air compressors so I'm not sure where to put the oil. There looks like 2 possible spots. One that looked like an air intake when it was plugged in, and one slightly above it. The Air intake had some cheese cloth dipped in oil and wrapped in tape around the opening. I thought that was stupid until I found that the thread for that opening is too big for 1" and too small for 1.25" pipe threads. I'll post some pics with the serial numbers.