Thrifty- - - -spin the oil pump with a cutoff screwdriver bit in a drill motor and see if oil dribbles out of the lubricator nozzle. If the oil pan is removed, just hang it back on with a few bolts and put 2-3 quarts of oil in- - - -the oil you drained out to remove the pan will work just for testing purposes. If it doesn't flow oil, adapt an air hose to the nipple and give it a squirt of high pressure air to clear it, hopefully.
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!