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TM 10-3930-664-24
4-10. CRANKSHAFT MAIN BEARING REPLACEMENT
This task covers: Removal, Cleaning, Inspection, and Installation
INITIAL SETUP:
Tools and Test Equipment:
Equipment Condition:
General Mechanic. Tool Kit (1, App. E)
Crankshaft removed (para. 4-9)
Nylon Brush (38, App. E)
Caliper Set, Outside (13, App. E)
Materials / Parts:
Lubricate 105 (39, App. C)
A. REMOVAL
1.
Remove bearing halves (1, 2) from cylinder
block and main bearing caps (3).
2.
Determine size of bearings removed and obtain
same size replacements (as required)
3.
Remove piston cooling nozzles from journals in
cylinder block only if replacement is required.
B. CLEANING
1.
Clean crankshaft journals using a nylon brush.
2.
Clean crankshaft, main bearing caps, and main
bearings in accordance with paragraph 1-24.
C. INSPECTION
1.
Conduct
general
inspection
of
crankshaft
components in accordance with paragraph 1-24.
2.
Inspect crankshaft journals for deep
scratches or indications of overheating.
4-18
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