Mitsubishi 4DQ50 Service Manual page 47

2. Controlling process at the lowest governing scope of engine.
(Fig. 5)
Once the engine has started, the engine is kept at idling condition by maintaining the
control-lever at idling position
(2).
In this case the idling position of the control-lever
(2)
is
slightly before the original position
(0).
Under this condition, the governor begins its self-governing automatically. When the
control-lever drawn back from the starting position, the governor-spring is eased so that it
reaches barely the vertical pOSition coming about under the revolving center of the
tension-lever. Accordingly the force of the governor-spring which acts on the shifter,
guide-bush and flyweight through the tension lever becomes very weak, and the flyweight
may spread outside even at a low-speed r.p.m.
Full Idling
Cantral-lever
FuII-load-
stopper
Fig. 5
Idling
The flyweight transfers the guide-bush and the shifter following the direction of the
arrow as shown in Fig. 5. The guide-lever connected with the shifter will move with the
shifter, and revolve the floating-lever, and the lever will pull the control-rack connected with
it to the idling position.
In this case the tension-lever comes in touch with the idling-sub-spring and performes
idling smoothly helped by the spring.
When the r.p.m. is lowered, the centrifugal force will be decreased, the spring will
be
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