In the good old days when you did a lube job you need those cotter pins after re-greasing the front wheel bearings. Then you looked at the chart to make sure you got all the zerk fittings after checking the diff and the transmission fluids. Then it was time to lower the car to the ground, open the hood and finish the lube job making sure that if the bell rang you went out to the fuel pumps to take care of a customer that need gas, windshield clean, fluids checked and finally the tire pressures.