oil pressure gauge priming

Spridgeteers,

I am finally about ready to reinstall my engine!! Among other items, 
I had to replace the combination oil pressure water temperature 
gauge. Is there a technique for getting oil into the line or it this 
even what needs to be done?

Thanks,

Jeff
Jeffrey H. Boatright, PhD
Senior Editor, Molecular Vision
http://www.molvis.org/molvis
"Seeing the Future in a Very Tiny Way"