Kubota WSM 07-E3B Series Workshop Manual page 94

07-E3B SERIES, WSM
 At Idling
When the speed control lever is turned clockwise, the
engine rotates at idling speed. It tensions the governor
spring (7) to pull the fork lever 2 (1).
When the fork lever 2 (1) is pulled, it moves the torque
spring pin (3) and the fork lever 1 (5) in the direction of
the arrow A to restrain the weight. In combination with
the start spring tension, it is balanced with the centrifugal
force of flyweight (6) to keep idling.
(1) Fork Lever 2
(2) Speed Control Lever
(3) Spring Pin
(4) Start Spring
(5) Fork Lever 1
 At rated speed with full load and overload
As the speed control lever is changed from the middle
speed to high speed, the governor spring tension
increases to compress the torque spring (3) and move
the fork lever 1 (7) in the direction of the arrow A.
The fork lever 2 (4) moves until it reaches the output
limiting bolt to keep rated rotation and rated output.
When the engine is overloaded, the engine rotating
speed decreases and the centrifugal force of flyweight
(8) decreases. Then the torque spring (3) moves the fork
lever 1 (7) in the direction of arrow A.
The control rack (2) moves in the direction that
increases fuel supply to increase the output.
balanced with the centrifugal force of the flyweight (8) to
produce low-speed output (torque output).
(1) Idle Limiting Spring
(2) Control Rack
(3) Torque Spring
(4) Fork Lever 2
(5) Output Limiting Bolt
M-12
ENGINE
(6) Flyweight
(7) Governor Spring
A : Direction of movement
W1014034
It is
(6) Torque Limiting Bolt
(7) Fork Lever 1
(8) Flyweight
A : Direction of movement
W1014276
KiSC issued 06, 2020 A