Most likely you shouldn’t have to take the gun apart to clean it.  Once the parts are exposed spray them then use a tooth brush or Q tip to clean them.  Once clean use some oil.

You’d be surprised how well a good oil like Breakfree CLP works just by itself.

Thanks Clarence, I could not see it sticking out the front of the block and it moved very easily when I pushed it in from the hammer side.  It must be a shallow pin.