7 tooth steering gear box rebuild

[MTD91]

Hi, I’ve been working on a 7 tooth gearbox. So it has a grease zerk where the sector shaft goes. One of the sector bushings has a partial hole drilled in the edge of it for the grease. My new sector bushings don’t have any hole in them. My question is if I run 600w gear oil can I eliminate that grease zerk? The new sector shaft doesn’t fit the old bushings.