HYDRAULIC GOVERNORS be placed between the base of the governor and the mounting pad on the engine. If the governor is equipped with a serrated drive shaft, it should slip into the internal serrations of the drive freely enough to drop into place of its own weight. CAUTION: DO NOT DROP OR REST THE GOVERNOR ON ITS DRIVE SHAFT. If a keyed type governor drive shaft is used, the gear placed on this shaft should be checked to insure that it is meshing properly. There should be neither excessive backlash nor binding, Irregularities caused by uneven gear teeth, shaft runout, etc., will be picked up by the governor, transmitted to the fuel control system, and will result in erratic governing. Since the load limit device operates hydraulically rather than mechanically the load indicating pointer position cannot be changed by turning the load limit control unless the governor is running (or has oil pressure in its accumilators). When installing governor the terminal shaft must be rotated by a lever in order to obtain no fuel (zero load) position, CAUTION: DO NOT MANUALLY FORCE ENGINE LINKAGE TO INCREASE FUEL WITHOUT FIRST TURNING LOAD LIMIT KNOB TO 10, The linkage from the governor terminal shaft to the fuel control system should be free from lost motion or excessive friction. It is often desirable to install a light spring acting to decrease fuel for the purpose of taking up lost motion due to wear. Avoid exceeding the working capacity of the governor by using too strong a spring. 3-18