TM 5-3805-290-23-1
THEORY OF OPERATION - CONTINUED
0003 00
FUEL SYSTEM
0003 00
1.
Fuel Injection.
a.
Engine has an electronically controlled axial piston distributor injection pump.
b.
Electronically controlled axial piston distributor injection pump generates injection pressure for all cylinders in a
single pump. Injection pump is responsible for distributing fuel to fuel injectors. Injection pressure is generated by
a piston moving axially. Piston movement is parallel to fuel injection pump shaft.
c.
When engine is cranking, fuel is pulled from fuel tank through fuel filter/water separator by fuel priming pump.
When fuel passes through water separator, any water in fuel will go to bottom of bowl. Fuel priming pump sends
fuel at low pressure to secondary fuel filter. From secondary fuel filter, fuel passes through fuel supply line to fuel
injection pump. Fuel injection pump sends fuel through high pressure fuel lines to each fuel injector. Injectors
spray atomized fuel into cylinder.
427-B1511