ARMY TM 9-2815-254-24
AIR FORCE TO 38G1-94-2
(3)
(4)
(5)
Gently rotate
crankshaft in normal direction of rotation.
Read inside micrometer as you turn crankshaft. Standard run-out is 0.012 in. (0.03 mm) or less, with a
limit of 0.0024 in. (0.06 mm)
If measured run-out exceeds knit, replace crankshaft.
FIGURE 2-85. Crankshaft Run-out
d. Use a vernier caliper to measure spead, refer to FIGURE 3-86. The limit for bearing spread for crank-
shaft bearings is 2.93 in. (74.5 mm) and 2.22 in. (56.5 mm) for connecting rod bearing.
FIGURE 3-86. Bearing Spread Measurement
3-136
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