TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download
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TM 9-2815-220-24 THEORY OF OPERATION 0004 00 ENGINE SYSTEMS (Continued) 6. Lubrication System The lubrication system has five functions, it: • Reduces friction between moving parts. • Absorbs and dissipates heat. • Seals piston rings to cylinder walls. • Cleans and flushes parts. • Helps reduce operating noises of the engine. The engine oil pump produces pressurized oil that is forced through the engine oil coolers and oil filters to the engine oil galleries, bearings, turbosuperchargers, fuel injection metering pump and to the piston oil sprayer nozzles. These sprayer nozzles are located in the crankcase below each cylinder and provide a continuous oil spray to the pistons and cylinder walls. A pressure regulator valve, located on the right side of the crankshaft damper and oil filter housing, is influenced by the pressure in the main bearing oil gallery and returns the incoming excess unfiltered oil to the oil pan. Oil level is maintained by the leveling section of the oil pump allowing operation under all conditions such as cold oil and slope operation. WP 0004 00-5