Kohler COMMAND PRO CS10, Руководство по обслуживанию

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5.7
Section 5
Fuel System and Governor
5
13. Use the reverse of steps 1-5 to reinstall the
carburetor on the engine.
Governor
These engines are equipped with a centrifugal
flyweight mechanical governor. The governor is
designed to hold the engine speed constant under
changing load conditions. The governor gear/flyweight
mechanism is mounted inside the crankcase and
driven off the gear on the crankshaft.
Operation
Centrifugal force acting on the rotating governor gear
assembly causes the flyweights to move outward as
speed increases. See Figure 5-7. As the flyweights
move outward, they cause the regulating pin to extend
from the governor gear assembly.
d. Check components for contamination, wear,
or damage. See Figure 5-6. Use carburetor
cleaner to clean out any dirt or contamination.
Use a float kit if the inlet needle or float is
damaged or worn. If the inlet seat is damaged
or worn, the carburetor must be replaced.
Figure 5-6. Inlet Needle and Seat Wear/Damage
Details.
10. After the parts have been cleaned or exchanged,
slide the inlet needle onto the float tab, reinstall
the float assembly into the carburetor, and verify
that the correct float height has been restored.
11. If there were gum or varnish deposits in the area
of the inlet needle and seat, there is a good
possibility that the main nozzle may also need
cleaning before the bowl is reinstalled. The main
nozzle is threaded into the tower and can be
removed for cleaning, but be careful not to
damage it, as it is not available as a service part.
a. Use a thin, flat blade screwdriver to remove
the nozzle from the tower. If it does not turn
easily, use some carburetor cleaner to clean
the exposed threads in the tower.
b. Soak the nozzle in carburetor cleaner to
remove any deposits and blow it dry with
compressed air.
c. Reinstall it in the tower and thread it in until it
bottoms.
12. Reinstall the main jet and install the bowl gasket in
the groove. Reassemble the bowl to the carburetor
with the screw removed in step 7. Position the
bowl so the drain screw will be accessible after the
carburetor is mounted to the engine.
Grooved Wear
Dust
Figure 5-7. Action of Governor Gear.
The regulating pin contacts the tab on the cross shaft,
causing the shaft to rotate when the engine speed
changes. See Figure 5-8. One end of the cross shaft
protrudes through the side of the closure plate.
Through external linkage attached to the cross shaft,
the rotating action is transmitted to the throttle lever of
the carburetor.
When the engine is at rest, and the throttle control is in
the ‘‘fast’’ position, the tension of the governor spring
holds the throttle plate open. When the engine is
operating (the governor gear assembly is rotating), the
force applied by the regulating pin against the cross
shaft tends to close the throttle plate. The governor
spring tension and the force applied by the regulating
pin are in ‘‘equilibrium’’ during operation, holding the
engine speed constant.
Speed Increasing
Speed Decreasing