5063-5490 Engine
6V53TA Engine for M113A4 APC
The 5063-5490 engine is a six-cylinder V6 configuration two-stroke turbocharged and aftercooled diesel engine with 53cid (Cubic Inch Displacement) per cylinder, Model 6V53TA. The 6V53TA engine has a total displacement of 318 cubic inches and can produce up to 350 brake horsepower.
The 6V53TA engine is used in the M113A4 Family of the M113 Armored Vehicle Family. The 5063-5490 engine was developed to provide the required increased power for the M113A4 series of vehicles first developed for the US Army by BAE Systems and then for the M113A4 series of vehicles produced by FNSS in Turkey. The two-stroke diesel has a maximum speed of 2850 RPM and a small, light package compared to its maximum torque rating.
- Engine without Container
- NSN: 2815-27-053-9921 (2815270539921) / Part Number: 98001655
6V53TA Engine Features
- High Reliability
- Wide Environmental Tolerance
- Ease of Maintenance
- High-Torque for Physical Size
- Multi-Fuel Capable
- Robust Design
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Turbocharged Aftercooled 2-Cycle Diesel
On two-cycle diesel engines, normal aspiration refers to the engine having "neutral" air intake boost pressure. As 2-Stroke diesel engines do not have intake valves, a positive pressure must be generated to push the intake air into the cylinder which is provided by a supercharger, but the supercharger is not considered a pressure boost device as the induction of air into the cylinder causes a neutral average pressure in the intake system.
In turbocharged engine models, one or more turbochargers are used to provide positive boosted intake pressures to increase combustion efficiency and power output.
- Supercharger NSN: 2815-27-059-3812
- Supercharger Part Number: 23516739
In aftercooled engine models, the intake air is cooled after it has been compressed by the turbocharger and supercharger. In the 6V53TA engine, the aftercooler is a heat exchanger located in the "Vee"" of the Engine that cools the compressed air before it enters the engine intake air box. The heat of the induction air is transferred to the engine coolant system and then to the vehicular cooling system.
Speed Limiting Governor
5063-5490 engines are equipped with a speed-limiting governor. A speed limiting governor reduces the fuel injected into the cylinders once the desired maximum speed is reached. The linkage from governor to injector contains a hydraulic damper piston to reduce the rate of throttle change and protect against speed hunting. The 6V53TA is well known to have a mode of failure called "run-away". Run Away occurs when the governor mechanism fails or is incorrectly adjusted. The fuel injectors of the 5063-5490 are sprung loaded to maximum fuel. The governor and its linkages must be functional to reduce the fuel to prevent run away where the engine will keep accelerating until the engine fails. The only way to stop run away once it is happening is to shut off the air supply to the engine intake.
Lubrication System
The 5063-5490 engine has a rotary oil pump located within a housing on the front of the engine directly driven by the crankshaft. The georotor pump has 1.5" wide pump gears for higher capacity flow and is driven on a spline on the crankshaft. Gerotor pumps use a trochoidal inner rotor and an outer rotor formed by a circle with intersecting circular arcs. A suction tube and screened pickup suck oil from the oil pan. There are two oil pressure regulating valves in the oil pump housing that regulate the engine oil pressure.
- Oil Pump NSN: 2815-01-219-4102
- Oil Pump Part Number: 5104714
Cold Starting Aid
The 5063-5490 engine has electronically controlled glow plugs as a cold starting aid below 40F (4C). Power for the glow plug controller is tapped from the starter motor terminals. When the vehicle is switched to Engine Run condition, the glow plug controller is activated. The Glow Plug Controller pulses the glow plugs to heat them whenever the temperature of the engine is cold enough that the glow plugs can assist ignition. When the engine is running and has reached a suitable temperature, the glow plugs are automatically switched off.