TM-9-2815-220-24
AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TM-9-2815-220-24 - Page 40 of 1563
TM 9-2815-220-24
EQUIPMENT DESCRIPTION AND DATA
0002 00
WP 0002 00-2
ENGINE CHARACTERISTICS, CAPABILITIES, AND FEATURES (Continued)
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Lubrication of engines by forced feed system consisting of four circuits
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Scavenge, main or pressure oil, leveling, make up
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Circuits are operated independently by one oil pump with four separate sections
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Two intake manifold heaters
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Installed in air intake systems between intake manifold elbows and turbosuperchargers
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Preheats air entering cylinders to facilitate cold-weather starting and cold-weather idle
operation
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Crankcase vented by enclosed crankcase breather system
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Vented through crankcase breather tube at left of turbosupercharger exhaust pipe
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Fuel filters have top-mounted bleeder valves to remove air from fuel system
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Primary and fuel/water separator type secondary fuel filters
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Water in fuel filters is removed
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Primary fuel filter:
Water is removed by a constant bleed orifice
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Fuel/water separator type secondary fuel filter: Water is removed by an automatic water
drain
Models
Distinguishing Features
2CA
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Clean Air Package
Oil-cooled 28-volt dc, 650 ampere generator
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Produces alternating current rectified within the unit to give direct current to
output terminals
2DA
Clean Air Package
Air-cooled, 28-volt dc, 300 ampere generator
−
Blower motor mounted on generator draws cooling air from crew
compartment through air intake tube which extends along crankcase below
intake manifold on right side of engine
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Generator air exhaust tube elbow is connected to rear of engine shroud
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Outlet air is exhausted through engine rear cooling fan vane
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