TM 10-3930-669-34 (5) Measure crankshaft as follows: (a) Support crankshaft at outer main journals on prism-shaped blocks. (b) Measure outside diameter of each bearing journal at points "1" and "2," in the vertical and horizontal, as indicated by "a" and "b." (c) Measure width "3" for a loading bearing. (d) Note measurements and compare with the following: 1 Crankshaft bearing diameter: 2.75 inches (70 mm) maximum. 2 Crankshaft center locating bearing: 2.75 inches (70 mm). 3 Length of journal: 1.46 inches (37 mm) minimum. (e) Wear limit for ovality is 0.0008 inch (0.01 mm). (f) Using a micrometer, check other journals for out-of-round.  Refer to Table 3-1 for tolerances. (g) Check working surface of radial packing ring on flywheel flange.  Replace crankshaft if it is defective. 3-77