C12 Maintenance 2. General Maintenance436 C Series Maintenance Manual Rev.22.3.3 Joint #3 Reduction Gear UnitGreasing 1. Remove the grease plug from the Joint #3 greaseinlet of the Arm #2.2. Attach the grease nipple to the Joint #3 greaseinlet.3. Inject grease from the grease nipple using agrease gunGrease: SK-1AGrease amount: 3g4. Remove the grease nipple from the Joint #3grease inlet.5. Attach the grease plug to the Joint #3 greaseinlet.If the grease plug is damaged or deteriorated,replace it with a new one.