What oil to use in sears model 106175540 compressor
(Los Angeles .CA)
It looks very similar to the provided manual for 106171941.
I think I got it in late 1990 or early 91, I'm not entirely certain. I know I sold my 1969 ford van in 91 and couldn't fit it in my car's cargo area so I had to take the compressor off and the wheels. I am getting old , I am old.
The fellow I got it from traded it for a small oil less two piston small compressor and it didn't have the belt guard or the cover or handle.
I took the head off because he had no filters on it and I saw sand . I cleaned out the sand the little that was on top of the pistons and changed the oil and cleaned the flapper valves to make certain they were good. I also got a new belt from sears.
I used it mainly for air brushing and filling my cars tires and at times to run my 1/2" impact or other air tools.
It does have a manifold and built in regulator and pressure switch , all work fine .
On the label on the 12 gallon tank it says 8.5 CU-FT per min and 6.9 SCFM@40PSI and 5.8 SCFM @ 90 psi . It runs and then shuts off at 90 PSI so I assume that is the max PSI rating . It takes about 2 minutes to fill the empty tank to 90 PSI .
I cannot recall what sort of oil I used and nothing states what it recommended . I think someone told me 30 weight none detergent motor oil plus I have a red bottle of sears craftsman oil no weight stated just said none foaming better lubrication 1 pint. I have no idea if it's detergent type or synthetic or what. I don't recall ever using it . The manual I noted said use only 10/40 detergent type motor oil .
What's best ? Does it matter? Does it sound like it is max 90 PSI rated ? I don't recall when the pressure switch kicks back on because the check valve does not close fully so I bleed the tank down using the tanks drain . I did remove the check valve once and and blew it out and it did work . Looked like sand in there but no sand ever came out of tank drain or air lines, Rarely even water since it's so dry here. I even looked into the tank through the large check valve hole an saw no rust or sand. None in the oil either , I made a point of keeping the drained oil and strained it to see.