See Figures 1, 2, 3 and 4
Chassis greasing can be performed with a pressurized grease gun or it can be performed at home by using a hand-operated grease gun. Wipe the grease fittings clean before greasing in order to prevent the possibility of forcing any dirt into the component.
On most applications, the grease gun nozzle should be held onto or attached to the grease fitting, then the pump is operated to force fresh grease into the component. Some of the old, contaminated grease will usually be forced from the seams of a seal.