TM 5-4310-386-14
6-18. Crankshaft (Cont).
(i)
Remove two sets of stop rings (20). Ensure that main bearings (21) do not get damaged and mark
them (main bearing) on the back.
(j)
Remove crankshaft (6) from the flywheel end of the engine.
(2)
Inspect. (figure 6-23)
WARNING
Dry cleaning solvent PD-680 used to clean parts is potentially dangerous to personnel and
property. Avoid repeated and prolonged skin contact. Do not use near open flame or excessive
heat. Flash point of solvent is 138°F (60°C).
(a)
Clean all items with dry cleaning solvent and dry thoroughly.
(b)
Inspect crankshaft (1) and components for wear, cracks or scoring.
(c)
Inspect crankshaft for cracks by magnaflux method.
(d)
Support crankshaft (1) at outer main journals on prism-shaped blocks.
(e)
Measure all journals at point "1" and "2" in vertical and horizontal, as indicated by "a" and "b".
NOTE
Width of 3 inches should be measured on the journal for a locating bearing.
Maximum deviations from roundness, straightness, true run, and parallelism of all shaft
journals and crank pins, also wear limit is .00079 inch (0.02 mm).
(f)
Inspect with dial indicator, the other journals for out of roundness.
(g)
Replace the crankshaft if defective.
(h)
Inspect the locating pin on the camshaft gearwheel (2). The pin should extend .67 inch (17 mm)
from the side opposite the bearing identification mark.
6-54
