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18) Fuel filter
Fuel passage
The fuel flows as shown in the figure from the tank,
pressurized by the injection pump to high pressure, and fed
to the nozzle and injected to the combustion chamber.
The fuel after lubricating the nozzle needle is returned to
the tank through the overflow pipe.
1. Tank 3. Injection pump
2. Fuel filter 4. Nozzle and holder
5. Feed pump
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Inspection
If water is observed in the transparent plastic case, drain the water.
If dust, or other foreign matter is observed in the transparent plastic case, replace the filter if necessary.
Disassembly and reassembly
1. Provide a suitable pan to catch the fuel from the tank.
2. Remove the clips on the both side of the fuel filter.
3. Drain the fuel from the tank.
4. Loosen the clamping bolt securing the fuel filter.
5. Drain water, or replace the fuel filter.
6. Reassembly generally follows the disassembly procedure in reverse.
WARNING: KEEP AWAY FROM FIRE.
19) 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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