Figure 9-74. Inspection of Turbine Wheel and Shaft
Check the thrust bearing (20) for scoring or grooving, and check the thickness using an outside
micrometer. Scoring shall not exceed 0.003 inch (0.08 mm) in depth, and the minimum thickness shall be
0.090 inch (2.29 mm).
Check the bearings (22) for scoring and wear on the inside and outside diameters. Scoring shall not
exceed 0.003 inch (0.08 mm) in depth. The maximum inside diameter shall be 0.6272 inch (15.931 mm).
The minimum outside diameter shall be 0.9782 inch (24.846 mm).
Check the washers (23) for scoring or grooving. Scoring shall not exceed 0.003 inch (0.08 mm) in depth.
Replace all defective parts in accordance with the directions in step c, above.