TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 (3) Use compressed air to blow out all tapped capscrew holes and dry castings after cleaning. e. 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 break up any sludge or gum deposits. (2) Wash passages by flushing with solvents. See TM 9-247. (3) Dry passages with compressed air. CAUTION Do not allow 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 unserviceable. f. Nonmetallic Parts . Clean hoses and other nonmetallic parts with soap and water. g. Bearings. WARNING Do not use compressed air to dry bearings. Spinning a dry bearing with compressed air may cause injury to personnel or damage to equipment. (1) Bearings require special cleaning. After removing surface oil and gum deposits, place bearings in hot oil, 140°F (60°C), to loosen congealed oil and grease. Wipe bearings dry with a lint-free cloth; do not use compressed air. (2) See TM 9-214 for information and care of bearings. h. Electrical Components (1) Clean electrical components with clean cloth dampened with drycleaning solvent. Care must be taken not to damage protective insulation. WARNING Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with effective chip guarding and personal protective equipment (goggles/shield, gloves, etc.). (2) Use compressed air to dry electrical components. 2-14. INSPECTION a. General Instructions. Procedures for inspections will be the same for many parts and components which make up the vehicle 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 paragraph 2-15. b. Castings . (1) Inspect all ferrous and nonferrous castings for cracks. See MIL-STD-6866, Inspection, Penetrant Methods. Particularly check areas around studs, pipe plugs, threaded inserts, and sharp corners. Replace cracked castings. (2) Inspect machined surfaces for nicks, burrs, and raised metal. Mark damaged areas for repair or replacement. (3) Inspect all pipe plugs, pipe plug openings, capscrews, and capscrew openings for damage 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 ·, straightedge or surface plate. Inspect mating flanges for discolorations which may indicate leakage. Replace if warped. 2-28