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TM10-4320-324-14
6-11.
Crankcase Repair.
This task covers:
a. Cleaning/Inspection
b. Repair
c. Follow-on Maintenance
INITIAL SETUP
Tools
Materials/Parts
Micrometer, item 34, section III, appendix B
Bearing shells (4) - 03362379123456
Tightening fixture, item 34, section III,
appendix B
Equipment Condition
Precision gauge, item 34, section III, appendix B
Engine disassembled (para 6-7).
Taps, thread (2), item 34, section III, appendix B
Dial indicator, item 34, section III, appendix B
General Safety Instructions
Torque wrench, item 34, section III, appendix B
Wear personal protective equipment when using
Refacing device, item 18, section III, appendix B
cleaning solvent or compressed air for cleaning
Tool kit, general mechanics, item 35, section III,
purposes.
appendix B
a.
Cleaning/Inspection.
WARNING
Potential health hazards result from inhalation of petroleum solvent vapors and form contact of solvent with skin.
Use rubber gloves and hand cream for protection, an work with adequate ventilation.
Compressed air used for cleaning purposes will not exceed 30 psi. Use only with effective chip guarding and
personal protective equipment (goggles/shield, gloves, etc).
Petroleum solvents are highly flammable. Keep solvent container lids closed when not in use, and avoid all
possible risks of igniting solvent vapors, keep away from open flame and excessive heat. Flash point of solvent
is 100 to 138 degrees F (38 to 59 degrees C).
1) Clean all parts with solvent. Thoroughly wash out oil ways. Dry with compressed air.
(2) Clean tapped holes for lifting eyes and cylinder head bolts in crankcase by running down a tap. A greased tap
should be used for blind holes.
(3) Inspect crankcase for cracks. Replace cracked crankcase.
6-46
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