Why would you need to grease a bolt?!?!?
J/K...
How else am I supposed to grease the blinkers?! Sheesh!
They don't take grease, they use fluid :sombrero: http://kalecoauto.com/index.php?main_page=product_info&products_id=22
Unless it is a different design it sure looks like it missed getting the check ball during the manufacturing process. I would jest replace it, they are cheap. Have you tried to see if compressed air can be forced back through it?
Darrell