Yanmar 4LHA-HTP Operation Manual page 394

Chapter 3 Fuel Injection Equipment
6. Governing Mechanism
No-load maximum speed operation
Flyweight
Fig. 43 Operation of. governor equipped with negative torque control device: no-load maximum
speed control
When the negative torque control stroke is
completed and engine speed increases further,
the flyweights' centrifugal force will move the
governor sleeve to the right (Fig. 43). The start-
ing lever and the tension lever (through the tor-
que control lever) are then moved to compress
the governor spring until the governor spring
tension is balanced with the flyweights' centrif-
Governor spring
Governor sleeve
Starting lever
Torque control lever
Control sleeve
3-1-37
Tension lever
Cut-off port
ugal force in the no-load maximum speed posi-
tion. If engine speed further increases, the
control sleeve will move to the left until the
plunger's cut-off port enters the pump cham-
ber, resulting in non-injection so that the
engine's specified maximum speed will not be
exceeded.
4LHA Serit