Coupler seperation

What I'm trying to do is get the steering column out of the gear box in order to remove the steering column from the car. My book tells me to drive out the connecting rollpin. Then "prise" the coupling from the wormshaft and withdraw the column. I think what they mean by "prise" is: strap a grenade to the coupling, pull the grenade pin and hope for the best. I guess I'll go find myself a 1/4" punch and go back at it with a hammer. Thanks guys.

then slide that lil pin i have circled out and the column will pull right out.. just don'e lose the shoes and lil spring like clip inside the couple.

steering.jpg