Nanni 5.280HE Workshop Manual page 15

03-M Series, WSM
At Idling
When the speed control lever is set at the idling
position after the engine starts, the governor spring 1 (7)
does not work at all and the governor spring 2 (8) does
only act slightly. The governor sleeve (2) is pushed
leftward by a centrifugal force of steel ball (1).
Therefore, the fork lever 1 (10) and control rack (14)
are moved to the left by the governor sleeve (2) and then
the start spring (13) is compressed by the control rack
(14). As a result, the control rack (14) is kept at a position
where a centrifugal force of steel ball (1) and forces of
start spring (13), governor spring 2 (8) are balanced,
providing stable idling.
(1) Steel Ball
(2) Governor Sleeve
(6) Governor Lever
(7) Governor Spring 1
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 (1)
becomes small as the engine speed is dropped, and fork
lever 2 (9) is pulled to the right by the governor springs 1
(7) and 2 (8), increasing fuel injection. Though, fork lever
2 (9) becomes ineffective in increasing fuel injection
when it is stopped by the adjusting screw (21).
After that, when the force of torque spring (20)
becomes greater than the centrifugal force of the steel
ball (1), fork lever 1 (10) moves rightward to increase fuel
injection, causing the engine to run continuously at a high
torque.
(1) Steel Ball
(7) Governor Spring 1
(8) Governor Spring 2
(9) Fork Lever 2
To Stop Engine
When the battery current stops, the plunger (17) of
engine stop solenoid (16) is returned to the original
position, the spring (22) to keep the control rack (14) in
"No fuel injection" position.
(14) Control Rack
(16) Engine Stop Solenoid
M-5
DIESEL ENGINE
(8) Governor Spring 2
(10) Fork Lever 1
(13) Start Spring
(14) Control Rack
W1017317
(10) Fork Lever 1
(19) Idling Apparatus
(20) Torque Spring
(21) Adjusting Screw
W1017384
(17) Plunger
(22) Spring
W1018007
KiSC issued 08, 2012 A