Propane, or better yet- - - -acetylene is your friend where stubborn grease fittings are concerned. Wear a face shield, gloves, and long sleeves while you heat the part being lubed- - - -not the grease fitting itself. Hot grease can squirt a long way once it liquefies.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!