1993 Electra Evo. Lost oil pressure on the gauge. Took cover off oil pump, turned the rear wheel in 5th gear, oil pump not turning. Disassembled oil pump and cam cover and found that the oil pump gear on the crankshaft had teeth broken. The crankshaft bearing is moving out of the case. I found a bent up retaining ring laying in the cam chest. Not sure where the retaining ring goes, maybe it's supposed to hold the bearing in the case. Wondering if the bearing could be pushed back into the case if that's where the ring goes.