3-15. FUEL INJECTOR - MAINTENANCE INSTRUCTIONS (Cont).
engine. The injector control rack is actuated by a lever on the injector control tube which, in turn, is connected
to the governor by means of a fuel rod. These levers can be adjusted independently on the control tube, thus
permitting a uniform setting of all injector racks. Excess fuel exits the injector and is returned to a fuel
manifold. The fuel then returns to the fuel tank.
g. The fuel injector is one of the most important and precisely built parts of the engine. The injection of
the correct amount of fuel into the combustion chamber at exactly the right time depends upon this unit.
Because the injector operates against high compression pressure in the combustion chamber, efficient
operation demands that the injector assembly is maintained in first-class condition at all times. Proper
maintenance of the fuel system and the use of the recommended type fuel filters and clean water-free fuel are
the keys to trouble-free operation of the injectors.