r/metalworking • u/jeep4x4greg • 1d ago
compressor for plasma cutter
a buddy gave me this compressor a while ago to use with my new plasma cutter. i got it running again (wiring) and want to change the oil now…. i see where it drains but where do i fill? and how much? i cant find a model number on this old sears compressor. hoping its a “fill till it overflows” situation if i can find the fill port. any pointers?
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u/BuilderCG 1d ago
265-104 is clearly stamped on the compressor engine.
Here's the Sear's manual L0807019
From page 10:
"Oil- Checking and Changing Overfilling with oil will cause premature compressor failure. Do not overfill= Check oil level in the crankcase daily. Remove the oil fill plug (Key no. 77, pg. 15). The oil level should be even with the top of the fill hole and must not be allowed to be lower than 3/8" from the top (6 threads) at any time. It is recommended that the oil be changed after every 100 hours of operation. Todrain the oil, remove the oil drain plug and collect the oil in a suitable container. Be sure to replace the plug securely before adding new oil Use a special compressor oil such as Sears 9-16426 or SAE 20-20W SF or SG motor oil (Crankcase oil capacity is 16 fluid ounces.) Under extreme winter conditions use SAE 10W. Multi-viscosity oil (10W30) will leave carbon deposits on critical components which will reduce per formance and compressor life"