Question 429Motor Plants - Assistant Engineer70% to pass
A diesel-generator governor is hunting. After changing the oil, the governor is flushed and the compensation needle valve is adjusted, but the hunting persists. You should NOW_______________.
AI Explanation
The correct answer is D) carefully check for binding in the governor linkage.
The governor is responsible for maintaining a constant engine speed, and hunting (fluctuations in speed) indicates an issue with the governor's operation. If changing the oil, flushing the governor, and adjusting the compensation needle valve did not resolve the hunting, the next logical step is to check for any binding or mechanical issues in the governor linkage. Binding in the linkage can prevent the governor from functioning properly and cause the observed hunting behavior.
The other options are not the best next steps in this situation. Checking the air intake manifold pressure (A) or calibrating the fuel pump rack settings (B) are not directly related to the governor's operation. Setting the speed droop adjustment to zero (C) may not resolve the issue if the root cause is a mechanical problem in the linkage.
Related Questions
#427 If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperature, then the air should be purged, and the _______________.#428 Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at_______________.#430 The most common contaminate of governor hydraulic fluid is_______________.#431 When the timing gear backlash for a Roots-type blower has become excessive, the problem is properly repaired by_______________. #432 When inspecting the valve mechanism shown in the illustration, normal maintenance would include_______________. Illustration MO-0074