TM-9-2990-206-34&P Parts Manual, Tools and Maintenance for Turbocharger Model T18C01 Download
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1-4. REPORTING EQUIPMENT IMPROVE- cedure, just simply tell why the design MENT RECOMMENDATIONS (EIR). is unfavorable or why a procedure is difficult. EIR’s may be submitted on EIR’S can and must be submitted by anyone SF 368 (Quality Deficiency Report). who is aware of an unsatisfactory condi- Mail directly to Commander, U. S. Army tion with the equipment design or use. Tank-Automotive Materiel Readiness It is not necessary to show a new design Command, Warren, MI 48090, ATTN: DRSTA-MP or list a better way to perform a pro- A reply will be furnished to you. Section il. EQUIPMENT DESCRIPTION AND DATA 1-5. DESCRIPTION. a. General. Engines equipped with turbosuperchargers deliver more power per pound of fuel than unturbosuper- charged engines. Turbosuperchargers make use of the heat energy lost through engine exhaust gases. Exhaust gases from the engine drive the turbine wheel assembly which in turn drives the turbocharger impeller (compressor wheel). b. Operation. The exhaust gases from the engine enter the turbine housing through the exhaust connection on the turbine housing. The gases flow around the housing and radially inward. The exhaust gas pressure and the heat energy extracted from the gas causes the turbine wheel to rotate. The exhaust gases then exit through the exhaust outlet of the turbine housing and vehicle exhaust system. Rotation of the turbine wheel causes the com- presser wheel to rotate since they are mounted on a common shaft. Air from the vehicle air filter enters at the center of the compressor wheel and flows radially outward through the compressor housing. The air increases in pressure and leaves through an outlet on the outside of the compressor hous- ing, and enters the engine induction system. A center housing supports the turbine wheel, shaft, and compressor wheel. The turbine wheel shaft is supported by sleeve bearings. End play is con- trolled by a turbocharger thrust ring, thrust bearing, and thrust washers. c. Lubrication. The turbosuper- charger is pressure lubricated from the engine lubricating system through an external hose connected to the engine oil filter. The two turbine wheel shaft sleeve bearings have holes to direct oil,to the bearing bores and shaft journals. Oil passages in the center housing connect the oil inlet port with grooves machined in the bear- ing bores, which aline with holes in the bearings. Oil leaves the center housing, via bearing clearances, through the oil drain tube to the engine oil pan. Two turbocharger rings (spacer rings) prevent oil from entering the compressor housing, and one metal ring seal (seal ring) prevents oil from entering the turbine housing. 1-2 TM 9-2990-206-34&P