The batteries are charged by the battery charging alterna-
tor that is belt driven by the engine. Generator set control
system power is also supplied by the battery charging
alternator. The BATTERY CHARGE ammeter indicates
the charge/discharge rate of the batteries, from-10 AMPS
to +20 AMPS, in 5 AMPS increments. Normal operating
indication depends on the state of charge in the batteries.
A low charge, such as exists immediately after engine
starting, will cause a high reading (needle moves toward
CHARGE area). When the charge in the batteries has been
restored, the indicator moves near zero.
1-12 FUEL SYSTEM.
1-12.1 The Fuel System (Figure 1-4), consists of piping,
fuel tank, transfer pump, fuel filter/water separator, injec-
tion pump and injectors. Fuel is drawn from the fuel tank
by the transfer pump. After reaching the transfer pump,
fuel passes through a fuel falter/water separator where
water and small impurities are removed. The fuel then
goes to an injection pump where it is pressurized and
pushed into the injectors. Through the injectors fuel enters
the diesel engine combustion chamber, where it is mixed
with air and ignited. The fuel that is not used is returned
to the fuel tank via an excess fuel return line.
1-12.2 The Auxiliary Fuel System consists of extenal
fuel supply, fuel filter, piping, a 24 VDC auxiliary fuel
pump and a fuel level float switch. When the MASTER
SWITCH is set on PRIME & RUN AUX FUEL it actu-
ates the auxiliary fuel pump and transfers fuel from the
external fuel supply to the generator fuel tank The fuel
level float
ARMY TM 9-6115-644-10
AIR FORCE TO 35C2-3-446-11
MARINE CORPS TM 09249A/09246A-10/1
Figure 1-4. Fuel System
Change 1 1-13
