HYDRAULIC GOVERNORS OIL SPECIFICATIONS Use SAF 20 or SAE 30 oil for ordinary temperature conditions. If governor operating conditions are extremely hot, use SAE 40 or SAE 50; if extremely cold, use SAE 10. The oil must not contain additives which are used to free up rings, remove carbon, etc., unless a nonfoaming additive is also present. The oil should not foam or sludge excessively when agitated, or form gummy deposits when heated. DIRTY OIL CAUSES MOST GOVERNOR TROUBLES. filtered oil. Use clean, new oil or All containers must be clean and should be rinsed with light grade fuel oil before using. Keep governor oil at correct level in oil gauge, STARTING ENGINE When starting the engine, set the load limit (fuel limit) at 5 on the dial. This prevents the engine from getting excessive fuel and accelerating too rapidly. the ioad limit to 10. its normal speed. After the engine has warmed up, turn By means of the synchronizer adjust engine to Experience will determine if it is necessary to fur- ther limit the fuel on future starts. COMPENSATING ALCJUSTMENTS Although the governor may appear to be operating satisfactorily because the engine runs at constant speed (without load) the governor still may not be adjusted correctly. High overspeeds and underspeeds after load changes and slow return to normal speed are results of incorrect compensation adjustments. 3-19