Check the oil pump- - - -I'll bet you find some sort of foreign matter jamming the gears. If the strainer screen gets a hole in it there's nothing else protecting the pump gears from ingesting something big enough to jam them up.
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!