Take a good look at the round thing just below the "R" in your first photo, clean it and see if there is a wick in the center----------I have seen things like this where you apply a drop or two of oil to them. Also, if there is a ball, that you can push down, it is for use with an oil can with a skinny applicator tip, or grease gun with needle tip.
Not sure if this is actually what you have there, but worth checking it out.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011

Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."