Figure 4-49. Measuring Crankshaft Thrust Surfaces.

TM 55-1930-208-24

4-15. CRANKSHAFT AND SEALS - Continued.

c. Inspection - Continued.

(16) Measure the crankshaft thrust surfaces as shown in figure 4-49. If worn or grooved, the crankshaft must be

replaced.

Figure 4-49. Measuring Crankshaft Thrust Surfaces.

(17) Check the crankshaft end play as shown in figure 4-50, by moving the crankshaft toward the gage with a pry bar.

Keep a constant pressure on the pry bar and set the dial indicator to zero. Then, remove and insert the pry bar on

the other side of the bearing cap. Force the crankshaft in the opposite direction and note the amount of end play on

the dial. The end play should be .004 inch to .011 inch with new parts or a maximum of .018 inch with used parts.

Insufficient end play can be the result of a misaligned rear main bearing or a burr or dirt on the inner face of one or

more of the thrust washers.

Figure 4-50. Checking Crankshaft End Play.

4-66