ENGINE SYSTEMS
71
Inspection
If water, dust, or other foreign matter is observed in the transparent plastic case, clean and replace the filter if necessary.
Disassembly and reassembly
(1) Remove the filter turning the filter ring nut counterclockwise.
NOTE: Take care to the O-ring fitted between the ring nut and main body, coat with grease before tightening.
(2) Coat the area of the element to be mounted to the main body with grease and install the element by hand.
20) Governor
Structure and functions
(1) Governor
This governor is a mechanical all-speed governor. It
is installed in the gear case. The fly weight ass’y is
installed to the cam shaft and its movement is
transmitted to the control rack of the injection pump
through the slider control lever link. The spring
which controls the movement of the fly weight is
hitched to the arm COMPL and tension lever. The
spring tension is changed by changing the governor
lever so as to control the engine speed.
(2) Maximum speed set bolt
A bolt is mounted on the cylinder block. This bolt
limits the movement of the arm COMPL (unloaded
maximum rpm). This bolt has been adjusted and
sealed at the factory.
(3) Smoke set, start spring
These are built into the cylinder block, to regulate
fuel injection amount at high speed range.
Regulation of fuel injection amount at middle speed
range is made with torque control spring to realize
bigger torque.
A start spring is placed between the gear case and
link. This spring automatically functions to increase
injection amount of fuel at the time of engine start.
The smoke set had been adjusted at the factory.
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