ENGINE
b) At Idling
At the idling position of the speed control lever(15),
the governor spring 1 (2) is free and the governor
spring 2 (3) does only act slightly. The governor
sleeve (12) is pushed leftward by a centrifugal force
of steel ball(13). Therefore, the fork lever 1 and
control rack(14) are move to the left by the governor
sleeve and then the idling adjusting spring(16) is
compressed by the control rack. As a result, the
control rack is kept at a position here a centrifugal
force of steel ball and forces start spring, governor
spring 2 and idling limit spring are balanced,
prdviding stable idling.
I M P O RTANT :
• The idling speed has been factory-set. The idling
adjusting screw(20) and spring(16) should not be
disassembled and readjusted.
(1) Start Spring
(13) Steel Ball
(2) Governor Spring 1
(14) Control Rack
(3) Governor Spring 2
(15) Speed Control lever
(4) Fork Lever 1
(16) Idling Limiting Spring
(12) Governor Sleeve
(20) Idling Limiting Screw
c) At High Speed Running with Overload
When an overload is applied to the engine running
at a high speed, the centrifugal force of steel ball(13)
becomes small as the engine speed is dropped,
and fork lever 2(5) is pulled to the right by the
governor spring 1(2) and 2(3), increasing fuel
injection. Though, fork lever 2 becomes ineffective in
increasing fuel injection when it is stopped by the
adjusting bolt(17). After that, when the force of
torque spring(18) becomes greater than the
centrifugal force of the steel ball, fork lever 1(4)
moves rightward to increase fuel injection, causing
the engine to run continuously at a high torque.
(17) Adjusting Bolt
(18) Torque Spring
d) To Stop Engine
When the stop lever(19) is moved to the STO P
position, fork lever 1(4) is moved leftward and the
control rack(14) is moved to the mini-injection
position, stopping the engine.
(4) Fork Lever 1(19) Stop Lever
