Woods belly mower

I whacked a stump with my Woods 42" cut belly mower. Now I need to replace the two blades. Can anyone tell me how to remove the pins? It appears to be a 3/4 inch bolt with some sort of cut out for pin removal. Left handed threads??? Please help...grass is growing fast...

Once you loosen the bolt turn the half moon and push the pin up with your finger.

lefty loose

Thanks Mike