4TNV98 & 4TNE98 Diesel Engine Section 4. Fuel System183During IdlingFigure 7-26When the engine starts and the accelerator pedal isreleased, the control lever returns to the idleposition and the tension of the governor springbecomes zero. Therefore, the flyweight opensoutwardly even at low revolutions to move thegovernor sleeve to the right.This makes the start lever turn clockwise with M 2being the fulcrum to move the control sleeve in thedirection to reduce the fuel volume. The governorsleeve stops at a point where the flyweightcentrifugal and idle spring force are balanced toensure stable idling.
