Yanmar 4JH2E Service Manual page 125

Chapter 3 Fuel Injection Equipment
16. Governing Mechanism
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Full-load and no-load maximum speed control
Maximum-speed
adjusting screw
11110Jw
Flyweight
Governor spring
-
Idling spring
Full-load adjusting screw
Tension lever
Corrector lever
~.<!!.
~tarting
lever
/'=f~a~~
M1 (fixed)
Mi (fulcrum)
Control sleeve
Fig. 22 Variable speed governor operation: full-load operation maximum speed control
When the accelerator pedal is fully depressed
and the control lever has contacted the max-
imum speed adjusting screw, the tension lever
contacts the pin (M3) press fitted to the pump
housing (i.e. where the full-load injection
quantity is obtained) and can move no further.
At this time the governor spring set force is at
a maximum. Because of this, the idling spring
3-60
is fully compressed and the flyweights, being
pushed by the governor sleeve, are closed.
Then, although the centrifugal force of the
flyweights increases with the increase in en-
gine speed, the flyweights cannot move the
governor sleeve until the governor spring's set
force has been overcome.
Printed in Jaran
AOA1029-9109SP