6-12. REPLACE/INSPECT CRANKSHAFT.
This task covers
Tool Kit, General Mechanics (Item 1,
6-10 Piston and connecting rod
Guide, Ol1 Seal Fining, Crankcase
Cover and Crankshaft/Crankcase
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
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