HYDRAULIC GOVERNORS Make the following adjustments to be certain that the governor will give optimum control. After the temperature of the engine and the oil in the governor have reached their normal cperating values, the compensation should be adjusted without load on the engine as follows; 1. Loosen the nut holding the compensation adjusting pointer and set the pointer at its extreme downward position. Remove the plug, open compensating needle valve two or three turns with a screwdriver, and allow the engine to hunt or surge for about one half minute to bleed trapped air from governor oil passages. Gradually close needle valve until hunting just stops. not go veyond this position. Do. Check the amount of needle valve opening by closing the valve completely, noting the amount of a full turn required to close. Open the valve to the previously determined opening at which hunting stopved. manually disturbing engine speed. Test action by If the needle valve is now less than 1/2 turn open and more than 1/8 turn open, the adjustment is satisfactory and (4), (5), (6), and (7) instructions should be ignored. If hunting did not stop with the needle valve at least 1/8 turn open, raise the compensation pointer two divisions of the scale and continue with the following instructions. Open needle valve approximately one turn to allow engine to hunt. 3-20