that procedure seems to suggest that you have to drive the "pin" upwards.If you have broken the "pin" you will need to use another similar sized bolt or a drift to hammer the "pin"out ,like a punch and a nail
6. Underneath again, subframe arm removed, you can see the actual subframe bushing. At this point, the subframe itself is being supported by a 4x4 post on a jack. The bolt in the center is the pin previously mentioned. You need to hammer the pin up and push it out of the bushing. Be ready to hit it hard. Don't mess up the threads! Put the nut on and hammer on a socket! Pin shown removed on the right