Kubota Z400-B Handbuch Seite 49

OJ09F038
• At medium or high speed running
When the speed control lever (1) is turned further, the
governor spring (2) increases the tension and the control rod
(3) is pulled to increase the engine speed,
The steel balls (4) increase their centrifugal force and the
control rod is pushed, decreasing the engine speed, until the
centrifugal force and the spring tension are balanced.
When the engine speed is dropped (A-*B) with the increase of
the load (a-*b), the centrifugal force of the steel ball decreases
and the control rod is pulled. The amount of the fuel to
the injection nozzle is increased to produce a higher engine
torque required for the load.
(1) Speed Control Lever
(2) Governor Spring
(3) Control Rod
(4) Steel Ball
(5) Engine Torque Curve
(6) Large Load Torque Curve
(7) Small Load Torque Curve
(8) Torque
(9) Engine Speed
5
6
c
,
@
Bi .... A
CID-­
C047F067
• At maximum speed running with an overload
When the engine is overloaded at the high speeds and the
engine speed drops, the centrifugal force of the steel balls
(6) decreases and the governor spring (2) pulls fork lever 1 (1)
and2(3).
When fork lever 2 contacts the adjusting screw (5), the spring
(4) which is built in fork lever 2 begins to push the fork lever
1 to pull the control rod.
The fuel to the injection nozzle is increased to run the engine
at high speed and torque.
(1) Fork Lever 1
(2) Governor Spring
(3) Fork Lever 2
(4) Spring
(5) Adjusting Screw
(6) Steel Ball
M-39