2. Clean the surfaces adjacent to the two grease fittings (on the top and bottom covers) kingpin (see Figure 21.2).
Figure 21.2. Upper and lower kingpin grease nipples (indicated by arrows).
3. Fill the grease gun with the recommended brand of grease and press the tip of the grease gun onto the grease fitting until it stops.
4. Squeeze the grease from the syringe until it appears on the kingpin bushings.
5. Repeat the procedure for the other hole, then lower the vehicle to the ground.