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Page Title:
FUEL SYSTEM - CONTINUED |
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 TM 9-2320-312-10
THEORY OF OPERATION - CONTINUED
0003 00
FUEL SYSTEM - CONTINUED
3.
The high-pressure fuel system consists of the following:
a.
HEUI injectors at each cylinder;
b.
hydraulic pump--pressurizes a portion of the engine lubricating oil to the injection actuation pressure that is
required in order to power the HEUI injectors;
c. Injection Actuation Pressure (IAP) control valve--a high-precision valve that controls actuation pressure; and
d. IAP sensor--monitors actuation pressure and communicates this information to the engine ECM.
4.
The 40-micron primary fuel filter also serves as a fuel/water separator. A hand priming pump is mounted to the sec-
ondary fuel filter.
EXHAUST SYSTEM
The exhaust system removes exhaust gases from the engine through the exhaust manifold. The gasses flow into exhaust
pipes and a muffler to the atmosphere above and to the right side of the cab.
COOLING SYSTEM
1.
The cooling system consists of a circulating pump, a standard modulating water temperature regulator (thermostat),
a transmission oil cooler, charge air cooler, radiator, and an air-actuated engine fan clutch.
2.
The cooling system cools the engine by circulating ethylene glycol-based coolant through the engine and radiator.
Coolant is also directed to cool the engine air compressor.
ELECTRICAL SYSTEM
1.
The electrical system consists of two 12-volt batteries, 40kJ capacitor and capacitor relay, 100-amp alternator, and
voltage regulator that supply power to the engine 24-volt starter and trailer receptacle connectors. Vehicles
equipped with arctic heater use four 12-volt batteries and 40kJ and 120kJ capacitors.
2.
The KAPower capacitor is an electrical storage device installed in parallel with your vehicle batteries. The capaci-
tor is used, in conjunction with the batteries, to start the engine. Like the batteries, it derives its power from the
vehicle charging system and discharges this power when needed to crank the engine.
3.
In the event of low or discharged batteries, the vehicle can be started with the isolated available power of the capac-
itor, by using the emergency start switch.
BATTERIES
CAPACITOR RELAY
EMERGENCY START SWITCH
376-3000
376-3001
CAPACITOR
4.
The yard tractor is equipped with commercial 12-volt lights to include the following: headlights, marker clearance
lights, beacon warning light, floodlights, taillights, and backup light.
0003 00-2
Change 1
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