COUPLING AS 1160628 - Caterpillar

Illustration 1 g02242794
At removal of load:N1 Engine speed before removal of load (rpm)N2 Engine speed at removal of load (rpm)N3 Stabilized engine speed after removal of load (rpm)t1 Stabilization timeAt application of load:N4 Engine speed before application of load (rpm)N5 Engine speed at application of load (rpm)N6 Stabilized engine speed after application of load (rpm)t2 Stabilization time
Measuring speed variation rate with load removed. Operate the speed control level and set the engine to the rated output and rated speed condition. Under this condition instantaneously remove the load to bring the engine into the no load condition. Do without disturbing the speed control lever position. The engine speed will quickly rise but then will lower and stabilize. Record the momentary maximum speed N2 stabilized speed N3. The time needed for the engine to stabilize the speed from the moment the load is removed t1.
Measuring speed variation with load applied while operating the engine in no load condition instantaneously apply a specified load to the engine. Record the momentary maximum speed N5 stabilized speed N6. The time needed for the engine to stabilize the speed from the moment the load is applied t2
Calculate the speed variation rate from the results of above measurements. If, the speed variation rate deviates the specified limit make adjustments by changing the governor notch setting.