TM-9-2990-206-34&P Parts Manual, Tools and Maintenance for Turbocharger Model T18C01 Download
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TM 9-2990-206-34&P INSPECTION-Continued. INSPECT COMPRESSOR WHEEL AND NUT TOOLS: 0.3125 to 0.5000 inch telescope gage O.(X) to 1.00 inch micometer 1. Inspect compressor wheel nut (A) for thread damage or deformation. Cracked compressor wheel blades will break during operation and-cause failure.. 2. Inspect compressor wheel (B) for cracked, broken, bent, eroded, or missing blades. Inspect rear surface of compressor wheel for evidence of wear or scoring. 3. Measure and record compressor wheel bore diameter (C) using telescope gage and micromter. 4. Replace dammed comressor wheel nut. Replace com- CAUTION pressor wheel if damaged, or if bore diameter ex- ceeds 0.3739 inch (9.497 mm). INSPECT BACKPLATE TOOLS: 0.5000 to 0.7500 Inch telescope gage 0.00 to 1.00 inch micrometer 1. Inspect backplate (D) for cracks. Inspect mounting flange and machined mating surface for distortion or warpage. 2. Flush oil hole with solvent. Solvent must enter through hole (E) and flow freely through three holes (F). 3. Inspect thrust bearing (G) for evidence of overheating, scoring, or looseness. The three thrust bearing pads (H) must be smooth and flat. All three pads (H) must be parallel to surface (J) within 0.0010 Inch (0.025 mm). Surface (J) flatness must not exceed 0.0005 inch total indicator reading (TIR) (0.0127 mm TIR). 4. Inspect bore (K) for scratches or scoring. Measure bore diameter (K) using telescope gage and micrometer. Re- place backplate If bore diameter exceeds 0.6885 inch (17.49 mm). 5. Measure depth from surface (J) to thrust bearing pad (L). Replace backplate if depth exceeds 0.3980 inch 10.11 mm). 6. Replace backplate if cracked, distorted, or does not meet wear limit requirements. 3-12 TA097818