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TM 10-4320-311-14
6-12. Replace/Inspect Crankshaft.
This task covers:
a.
Removal
b.
Inspection
c.
Installation
INITIAL SETUP
Tools
Equipment
Tool Kit, General Mechanics (Item 1,
Condition
Appendix B, Section III)
Para
6-10
Piston and connecting rod
Guide, Oil Seal Fitting, Crankcase
assembly removed
Cover and Crankshaft/Crankcase
(Item 3, Appendix B, Section III)
6-11
Flywheel removed
Materials/Parts
Diesel fuel (Item 2, Appendix E,
Section II)
Lubricating oil (Item 3, Appendix C,
Section II)
Oil seal
REMOVAL: Refer to Figure 6-21.
a.
Remove bearing holder (1) and bearing holder nut (2).
b.
Pull out the crankshaft (3) It may be necessary to carefully tap crankshaft with a rubber mallet
c.
Remove oil seal (4) and discard
INSPECTION:
a.
Clean crankshaft components with diesel fuel.
b.
Inspect crankshaft components for damage or excessive wear. Replace crankshaft assembly and bearings if any
cracks or damage is found.
c.
Check that the crank pin OD is greater than 1.177 inches (29 90 mm). Replace crankshaft assembly and
bearings if crank pin is worn below wear limit
d.
Check that the plain bearing side (crankcase cover side) shaft OD is greater than 1.177 inches (29 91 mm).
Replace crankshaft assembly and bearings if worn below wear limit.
e.
Check the ball bearings (5) at the crankcase end for wear or damage. Replace if needed.
6-28
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