Yanmar 4LHA-HTP Operation Manual page 384

Chapter 3 Fuel Injection Equipment
6. Governing Mechanism
Full-load and no-load maximum speed control
Fig. 31 Combination governor operation: full-load maximum speed operation
On moving the control lever until it contacts
the maximum speed stopper bolt, the tension
lever contacts the pin (or the stop lever of the
BCS or ACS)M3 press-fitted to the pump hous-
ing and can move no further. Consequently, the
damper spring and the partial load spring are
fully compressed and the control sleeve travels
to the position where the full-load injection
quantity can be obtained.
c
Partial load spring
Governor spring
Flyweight
Starting lever
Control sleeve
Yoke
Damper spring
Tension lever
Ma (fixed)
Following this engine speed increases and, at
the point where the flyweights' centrifugal
force balances the combined forces of the
yoke springs (point (5) in Fig. 29), the full-load
maximum speed of maximum engine output
is reached.
3-1-27
, 4LHA Series