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TM9-2815-202-34 5.1-36.  TURBOCHARGER  REPAIR  (Cont) CAUTION (4) When polishing surfaces, use silicone carbide abrasive cloth  for aluminum parts and crocus cloth  for  steel  parts. Minor surface damage may be burnished or polished away. c.  Inspection (1) (2) (3) (4) (5) (6) (7) Inspect all parts for signs of damage, corrosion, or deterioration. Check for nicked, crossed, or stripped threads. Check turbine wheel for nicks, rubbing, and wear. Inspect shaft for signs of scoring, scratches, or bearing seizure. Check compressor wheel for signs of rubbing or blade damage. Check to see wheel bore is not galled. Inspect seal parts for signs of rubbing or scoring of running faces. Inspect backplate for wear or damaged bore. Inspect  center  housing  for  contact  with rotating  parts. d. Assembly (1) (2) (3) (4) (5) (6) 5-98 Lubricate bearing (25) and bearing (29) with engine oil. Install inner retaining ring (31), bearing washer (30), bearing (29), and outer retaining  ring (28) in compressor end of center housing (2). Install retaining ring (27), bearing washer (26), and bearing (25) in compressor end of center housing  (2). Lubricate thrust collar (23) and thrust washer (24) with engine oil. Insert thrust collar (23) into thrust washer (24) and install thrust collar, thrust washer, and three self-locking screws (22) in center housing (2). Torque screws to 30-35 lb-in (3.4-3.9 N-m). Install seal ring (19) in groove at compressor end of center housing (2). Change  1


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