TM 9-2320-361-10 2-10. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (Contd) e. Troublespots WARNING Drycleaning fluid is flammable and will not be used near open flame. A fire extinguisher will be kept nearby when solvent is used. Use only in well-ventilated places. Failure to do this may result in injury or death to personnel. NOTE Dirt, grease, oil, and debris may cover up a serious problem. Clean as you check. Follow precautions printed on container. Use drycleaning solvent on all metal surfaces. Use soap and water on rubber or plastic material. (1) Check all bolts, nuts, and screws. If loose, bent, broken, or missing, either tighten or report conditions to your supervisor. (2) Look for loose or chipped paint, rust, and gaps at welds. If a cracked or broken weld is found, report condition to your supervisor. (3) Inspect electrical wires and connectors for cracked or broken insulation. Look for bare wires and loose or broken connections. Tighten loose connections. If insulation is cracked or broken, wires bare, or broken connections, report to your supervisor. (4) Check hoses and fluid lines for wear, damage, and leaks. Make sure clamps and fittings are tight. (Refer to para. 2-11 for information on leaks.) f. Correct Assembly or Stowage. Check each component or assembly for installation in the right place and with no missing parts. 2-11. CLASS LEAKAGE DEFINITIONS Wetness around seals, gaskets, fittings, or connections indicates leakage. A stain also denotes leakage. If a fitting or connector is loose, tighten it. If broken or defective, report it. Use the following as a guide: a. Class I. Leakage indicated by wetness or discoloration not great enough to form drops. b. Class II. Leakage great enough to form drops but not enough to cause drops to drip from item being checked/inspected. c. Class III. Leakage great enough to form drops that fall from the item being checked/inspected. WARNING Hearing protection is required for driver, co-driver, and mechanic when engine is running. Noise levels produced by vehicle exceed 85 dB, which may cause injury to personnel. CAUTION Operation is allowable with a class I or II leakage. You must consider fluid capacity of the item/system. WHEN IN DOUBT, NOTIFY YOUR SUPERVISOR. When operating with class I or II leaks, check fluid levels more frequently. Class III leaks must be immediately reported to your supervisor. Change 3 2-33