f. Oil Passages. Particular attention must be given to all oil passages in castings and machined parts.
Oil passages must be clean and free of any obstructions.
(1) Clean passages with wire probes to breakup any sludge or gum deposits.
(2) Wash passages by flushing with solvents. See TM 9-247,
(3) Dry passages with compressed air.
Do not allow drycleaning solvents to come in contact with seals,
cables, or flexible hoses. These cleaners cause leather, rubber, and
synthetic materials to dry out, rot, and lose pliability making them
g. Nonmetallic Parts. Clean hoses and other nonmetallic parts with soap and water.
Do not use compressed air to dry bearings. Spinning a dry bearing
with compressed air may cause injury to personnel or damage to
(1) Bearings require special cleaning. After removing surface oil and gum deposits, place bearings in
hot oil, 140°F (60C), to loosen congealed oil and grease. Wipe bearings dry with a Iint-free cloth; do not use
(2) See TM 9-214 for information and care of bearings.
i. Electrical Components.
(1) Clean electrical components with clean cloth dampened with drycleaning solvent. Care must be
taken not to damage protective insulation.
Compressed air used for cleaning purposes will not exceed 30 psi
(207 kPa). Use only with effective chip guarding and personaI
protective equipment (goggles/shield, gloves, etc.).
(2) Use compressed air oa dry electrical components.
a. General Instructions. Procedures for inspections will be the same for many parts and components
which make up the engine subassemblies. General procedures are detailed in b through k, Dimensional
standards for parts have been fixed at extremely close tolerances, so use specification tables. Use specified
inspection equipment for inspection where cracks and other damage cannot be spotted visually. Exercise
extreme care in all phases of inspection. Repair or replace all unserviceable components; refer to para. 2-11.
(1) Inspect all ferrous and nonferrous castings for cracks. See MIL-I-6866, Inspection, Penetrant
Methods, and MIL-I-6868, Inspection Process, Magnetic Particles. Particularly check areas around studs,
pipe plugs, threaded inserts, and sharp comers. Replace cracked castings.
(2) Inspect machined surfaces for nicks, burrs, and raised metal. Mark damaged areas for repair
(3) Inspect all pipe plugs, pipe plug openings, capscrews, and capscrew openings for damaged and
stripped threads. Replace if damaged or threads are stripped.
(4) Check all gasket mating surfaces, flanges on housings, and supports for warpage with a straight
edge or surface plate. Inspect mating flanges for discolorations which may indicate leakage. Replace if
(5) Check all castings for conformance to applicable repair standards.