INSPECTION - CONTINUED
Inspect feather edge of oil seal for hardness or cracks. Metal-encased oil seals should not be re-
placed unless inspection indicates damage.
CORE HOLE PLUGS
Inspect core hole plugs for evidence of leakage. Replace if damaged or if leakage is evident.
The procedures for repair will be similar for most components and parts that make up the engine. Any
repair procedure that is peculiar to a specific part or component is covered in the paragraph relating to
the item. After repair, clean all parts thoroughly to prevent metal chips or abrasives, that may accu-
mulate during repair, from entering moving parts of engine.
Replace all cracked castings.
Replace all castings that do not meet specifications given in paragraph relating to that item.
Repair minor damage to machined surfaces with a fine file, emery cloth (item 1, appendix B),
or crocus cloth (item 4, appendix B) dipped in drycleaning solvent (item 16, appendix B).
Replace all castings with machined surfaces burred or nicked so badly that, after milling or
grinding, they still will not allow proper assembly or operation.
Repair minor warpage of mounting flanges and gasket surfaces by moving the surface across a
sheet of emery cloth (item 1, appendix B) held tightly on a surface plate or similar flat surface.
Finish with crocus cloth (item 4, appendix B). Replace castings with flanges warped so badly
that they will not allow proper assembly or operation.
Pipe plug threads in castings must be in good condition to prevent oil or water leakage.
Repair damaged pipe plug or screw threads in tapped holes by using the appropriate tap.
Replace all galled, pitted, or damaged bail bearings.
Replace all ball bearings that do not meet specifications given in paragraph relating to the part in
which they are installed.
Refer to TM 9-214 for maintenance of bearings.