With the hydro in place, the control linkage and the brake rods can be connected and roughly adjusted. The stub shaft coming from the rear of the hydro is often used by enthusiasts to run another hydraulic pump or homemade rear PTO. The shaft spins at the same rate as the tractor's engine speed. Note that the hydro's cooling fins were masked during painting. The two buttons to the right of the colling fins are the charge pump relief valves, which must be pushed down in order to roll the tractor around without the possiblity of damaging it.