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TM 5-4320-305-24
4-12. REPLACE/REPAIR CRANKSHAFT ASSEMBLY (Continued)
CLEANING:
WARNING
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.
Death or serious injury could occur if compressed air is directed against the skin.
Do not use compressed air for cleaning or drying unless the pressure is/has been
reduced to 30 psi (2.11 kgcm2) or less. When working with compressed air always
use chip guards, eye protection, and other personal protective equipment.
1
Clean crankshaft oil passages with a stiff wire brush. Clean crankshaft, rear-end cover, bearing caps, stop rings,
and dowel bushing wish diesel fuel oil and dry with compressed air.
2
Remove all traces of old gasket and sealant from the mating surfaces of the crankshaft and rear-end cover.
INSPECTION:
1
Inspect rear-end cover.
a.
Inspect crankcase mating surface for cracks, gouges, or other damage that would prevent proper seating or
sealing of rear-end cover. Replace a cracked cover.
b.
Inspect rear-end cover for warpage by placing it mating flange down on a flat surface. Replace a warped
rear-end cover.
c.
Inspect shaft seal bore for gouges, wear, or other damage that would prevent proper seating of the seal.
2
Inspect crankshaft gear for cracking, excessive wear, cracked or broken gear teeth, rust, corrosion, or other
damage. If gear is damaged or excessively worn, replace it. Inspect dowel sleeve keyhole. Make sure it has not
been worn out of its square shape or that dowel sleeve has not been broken off in dowel sleeve keyhole. If keyhole
is worn and/or part of dowel sleeve is lodged in keyhole, replace gear.
3
Inspect dowel sleeve for excessive wear. Replace if worn or damaged.
4-95
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