I'm trying to remove and replace my steering gear box. I know I need to remove the roll pin from the steering shaft coupling but not sure if I'm doing it right??? It doesn't seem to budge. I don't want to hammer on my pin tool too hard as the warning in the service manual states: 'IMPORTANT: bumping, jolting and hammering on the steering shaft and gearshift tube must be avoided during all servicing operations. If the shear pins are broken, the controlled length of the telescoping features will be changed, making these parts unfit for further use.' Thanks.