TM 10-4320-307-24
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CRANKSHAFT ASSEMBLY REPLACE:REPAIR (CONT)
13. If bearing journals are only slightly outside specified limits because of nicks. burrs. or high spots. remove these slight
imperfections with crocus cloth wet with lubricating oil. Work wet crocus cloth evenly around circumference of journal
until surface is polished smooth. If wet crocus cloth is not effective, use emery cloth. 120 grit for removing imperfec-
tions and 240 grit for finishing. Polish smooth with wet crocus cloth. Use a piece of rawhide or other suitable rope
wrapped around the emery cloth or crocus cloth and drawn back and forth will minimize the possibility of an out-of-
round condition developing (keep the strands of rawhide apart to avoid bind). If rawhide or rope is not used, the
crank- shaft should be rotated at intervals. If the above procedure is not effective or imperfections are too great, the
crank-shaft must be replaced.
14. Stone edges of all oil holes in bearing journal surfaces with surfacing stone to provide a smooth radius.
Death or serious injury could occur if diesel fuel oil is not handled carefully.
Use in a well ventilated area away from open flame, arcing equipment, ignition
sources, heaters, or excessive heat. Always store fuel in proper. marked
containers. DO NOT SMOKE.
15. Polish ground surfaces to an 8 to 12 RMS finish with crocus cloth wet with diesel fuel oil
16. Inspect crankshaft thrust surfaces. If slightly worn
or grooved, smooth out and polish surfaces with
wet crocus cloth. Make sure to leave a 0.1693 to 0
1772 inch (4.30 to 4.50 mm) radius (5) on
crankshaft between each thrust surface (6) and
bearing journal (7) or crankpin.
17. Clean up minor burrs and gouges of shaft seal and preformed packing seats with emery cloth. Repair any minor
dam-age, nicks, burrs, rust, or corrosion. If defects cannot be removed, replace rear-end cover.
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