TM 10-4320-315-24
4-13. MAINTENANCE OF CRANKSHAFT - (Cont)
(1)
Remove bolts (1), flat washers (2), main bearing caps (3), and bearing shell halves (4). Tag bearing halves
and bearing caps. Note the side where slot (11) is located between bearing cap and bearing shell.
(2)
Remove crankshaft (5) from crankcase.
(3)
Remove and tag bearing shell halves (6) from crankcase.
(4)
Remove crankshaft gear (7) and matched pin (8).
(5)
Remove thrust ring halves (9 and 10).
b. INSPECT. (Figure 4-17)
(1)
Inspect crankshaft for cracks.
(2)
Inspect crankshaft journals for grooves, burrs, and discoloration. Replace damaged crankshaft.
(3)
Measure all crankshaft journals at points 1 and 2 in horizontal and vertical plane (as indicated by A and B).
Record all measurements.
(4)
Measure width 3 of journal for locating bearing. Record measurements.
(5)
Compare recorded measurements with specifications in engine specification chart (Table 3-5). If crankshaft
does not meet all specifications, replace crankshaft.
Figure 4-17. Crankshaft Journal
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