CPLC7060V-1 Porter-Cable compressor

[paulroccafortesr]

I have a Porter Cable Single-Stage vertical 60 gal. compressor, model # CPLC7060V-1. I use in my artist canvas manufacturing biz. Over the last two weeks I have been smelling a burnt or hot oil smell when it runs. Today the compressor was smoking when it was pumping. When I put my hand on top of the compressor at the air filter, the whole top of the head was covered with oil.
I removed the compressor pump from the tank and took it to my bench. I removed the filter cover and found the intake ports covered in oil. I pulled the head off the pump and inspected the pistons and cylinder walls. All looked good. I removed the oil pan off the crankcase and checked out the crank, rods and lower cylinder walls. Again, everything looks great. I noticed a small black nylon looking mass inside one of the pistons. After getting out the parts manual, I see these are (2 of them) filters for the crankcase vents.
Is it posibel with one of these filters out, oil was being thrown up the vent and on to the air intake ports and intake filter? I would appreaciate input from anyone who knows before I replace the compressor pump.

[cmoorejack]

Hey Paul,
The filters are there to keep the vent clear of small particles..If somehow the vents get plugged ...it creates back pressure in the pump and causes the oil to escape or be pushed past the rings into the head..another possible problem is that air leaking back thru the tank check valve and got back into the pump and caused this..also too much oil added can be an issue because of the 'splash' design of the pump where the piston rod tips splash down into the oil to lubricate.. this pump.. however is difficult to overfill so you may have some other problem..
Make sure your pump head is cleaned of any oil in the valves, replace gaskets if needed..and inspect the check valve for leaks..[with the tank filled up it should not leak at all]
parts avail at ereplacementparts.com
hope this is helpful..
cmoorejack

[paulroccafortesr]

Thanks!!!!!
I checked everything you suggested. I did notice a discoloration between the cylinder bores that went across the crankcase breather port slot. After reassembling the pieces of gasket that pulled apart when I pulled the head and valve plate apart. It seams there is about 3/8 inch of gasket missing. I have ordered a gasket kit and will put the pump back together and see what happens. I am going to use head gasket cement when I assemble the parts.
Again....thanks for all your help!
Paul