One time, when trying to remove an overrunning clutch, I was able to get both zerks off but couldn't locate the pin because of all the hardened grease and debris inside. I simply compressed the C-clip holding the clutch together and slipped the outer housing off, exposing the inner components. After a little cleaning with a wire brush, the pin was obvious, and I could drive it out. Put a bucket under the clutch to collect the little parts as they drop out. Reassembly is no problem.
Frank Z.