TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 6-38. TURBOCHARGER REPAIR (Cont) c. d. NOTE Before cleaning, inspect parts for signs of burning, rubbing, or other damage which might not show after cleaning. (1) Soak all part is in dry cleaning solvent for 25 minutes. Using a stiff bristle brush, remove all dirt particles. Dry all parts thoroughly. WARNING Compressed air used for cleaning purposes will not exceed 30 PSI. Use only with effective chip guarding and personal protective equipment (goggles/shield, gloves, etc). (2) Using compressed air, blow clean all internal cavities and oil passages in center housing. inspection (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) Inspect all parts for signs of damage, corrosion, or deterioration. Check for nicked, crossed, or stripped threads. Check turbine wheel for signs of rubbing or wear. Inspect shaft for signs of scoring, scratches, or bearing seizure, Check impeller for signs of rubbing or blade damage. Check wheel Inspect seal parts for signs of rubbing or scoring of running faces. Inspect turbine nozzle for erosion and bent vanes. Inspect diffuser for dirt and foreign matter. bore for galling. Inspect center housing, compressor housing, and turbine housing for contact with rotating parts. Replace thrust washer if faces are worn unevenly or scratched excessively. Smooth or polish minor surface damage. Use silicone carbide abrasive cloth for aluminum parts and crocus cloth for steel parts. Assembly (1)If removed, install two pins (48) in compressor end of center housing assembly (1 2). Pins must extend 0.075 to 0.085 inch above surface. (2) Install gasket (46) and diaphragm (45) on center housing assembly (12). Aline holes in diaphragm (45) to holes in center housing. NOTE Place four bolts through diaphragm and center housing holes to prevent diaphragm from turning when torquing back plate. 6-48