Table 3-1.—Troubleshooting Chart-Governor

ENGINEMAN 1 & C Table 3-1.—Troubleshooting Chart-Governor Trouble Probable Cause Corrective Action Engine hunts or surges Compensating needle valve ad- justment incorrect Dirty oil in governor Make needle valve adjust- ment; ensure that the op- posite needle valve is closed Drain oil; flush governor; refill Low oil level Fill to correct level with clean oil Foamy oil in governor Lost motion in engine governor linkage or fuel pumps Drain oil; refill Repair linkage and realign pumps Governor worn or incorrectly adjusted Engine misfiring External fuel linkage sticking or binding Remove governor and make internal checks for clearances according to ap- plicable instructions Test and replace injectors Disconnect fuel rack from governor and manually move linkage and pro- gressively disconnect fuel pump links until binding area is found (dirt, paint, and misalignment are the usual causes of binding) Governor rod end jiggles Rough engine drive Check alignment of gears; inspect for rough gear teeth; check backlash of gear Governor base not bolted down evenly Loosen bolts; realign and secure every precaution should be taken to prevent the oil from becoming contaminated. Most hydraulic governors use the same type of oil that is used in the engine crankcase, provided it is absolutely clean and does not foam. You should change the oil in the governor at regular intervals, depending upon the type of operation, and at least every six months regardless of the operation. You must ensure that the containers used to fill the governors with oil are clean, and that only clean, new, or filtered oil is being used. You should also check the oil level frequently to ensure the proper level is maintained and that the oil does not foam. Foaming of the oil is usually an indication that water is present in the oil. Water in the oil will cause serious damage to the governor. After installing a new governor or one that has been overhauled, adjust the governor compensating 3-22