Technical information
16
Fuel system
The fuel is delivered by a primary fuel supply pump via the fuel filter to the distributor in-
jection pump.
The fuel is sprayed into the cylinder through four-hole nozzles fitted in screw-fit injectors
in the cylinder heads.
Excessive fuel delivered and leak fuel from the injectors flows through the return pipe to
the tank.
1
6
5
4
2
3
1 Fuel tank 4 Injection pump
2 Fuel supply pump 5 Overflow restrictor
3 Fuel filter 6 Injector
Injection pump
The in-line injection pump is driven from the crankshaft via gears. It is connected to the
force-feed lubricating system of the engine and consequently maintenance-free. The
centrifugal governor attached to the pump by a flange is mechanical variable speed gov-
ernor or a low-idle / maximum speed governor.
Fuel filters
Before entering the suction chamber of the injection pump, the fuel is cleaned in a paral-
lel box filter.
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