Kubota WSM OC60-E2 Workshop Manual page 47

OC60-E2, OC95-E2, WSM
At Idling
When the speed control lever (5) is moved in the
direction of arrow B until it hits against the idling setting
bolt (idling position), the governor spring (6) becomes
almost dead and the small tension idling spring (4) alone
sets to work. The engine starts idling when the idling
spring tension and the governor weight's (10) centrifugal
force become equal. The idling rpm can be adjusted by
repositioning the idling setting bolt,
At Idling to Maximum Speed
While the load is constant, the governor lever 1 (2) is
pressed in the direction of arrow D by the centrifugal
force of the governor weight (10) and at the same time
the governor lever 2 (1) is pulled in the direction of arrow
C by the governor spring (6). The centrifugal force and
the spring tension are now in balance against each
other to keep the speed constant.
control lever (5), the tension of the governor spring can
be changed to control the engine rpm.
As the load increases, the engine rpm drops to reduce
the centrifugal force of the governor weight.
governor lever 2 is therefore moved by the governor
spring tension, which makes the governor lever 1 turn in
the direction of arrow C. In so doing, the control rack (3)
moves to raise the fuel injection rate and thus to
increase the engine power output so that the engine rpm
should go up.
As the load decreases, the reverse steps take place
to drop the engine power output and thus to prevent an
abrupt rise in rpm.
At Maximum Engine Speed
When the speed control lever is moved in the
direction of arrow A until it hits against the maximum
rpm adjust bolt, the governor lever 3 (7) comes into
contact with the fuel injection limit pin to maintain the
engine rpm at maximum.
increases and the engine rpm starts dropping, the
governor lever 3 is activated to push the fuel injection
limit pin. This way, the governor levers 2 (1) and 1 (2)
turn in the direction of arrow C to raise the engine power
output.
M-13
ENGINE
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With the speed
The
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If in this state the load
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