TM 9-2320-386-10 2-78 Change 1 Section IV. OPERATION UNDER UNUSUAL CONDITIONS 2-30. SPECIAL INSTRUCTIONS .WARNING. • If NBC exposure is suspected, all air filter media should be han- dled by personnel wearing protective equipment. Consult your unit NBC officer or NBC NCO for appropriate handling and dis- posal instructions. • Hearing protection is required for the driver and co-driver. Hearing protection is also required for all personnel working in and around this vehicle while the engine is running (reference AR 40-5 and TB MED 501). • If required to remain inside the vehicle during extreme heat, occupants should follow the water intake, work/rest cycle, and other heat stress preventive medicine measures contained in FM 21-10, Field Hygiene and Sanitation. a. General. Special instructions for operating and maintaining vehicles under unusual conditions are included in this section. Unusual conditions are extreme temperatures, humidity, and/or terrain. Special care with cleaning and lubrication must be taken in order to keep vehicles operational when operating under unusual conditions. b. Cleaning. Refer to para. 2-8 for cleaning instructions and precautions. c. Lubrication. Refer to table 2-2 and para. 3-7 for proper operator’s lubricating instructions. d. Driving Instructions. (1) FM 21-305 contains special driving instructions for operating wheeled vehicles. (2) AR 600-55 contains instructions on driver selection, testing, and licens- ing. (3) FM 9-207 contains instructions on vehicle operation in extreme cold of 0° to -65°F (-18° to -54°C) or below. Other documents with information on cold weather vehicle operation are: (a) FM 31-70: Basic Cold Weather Manual (b) FM 31-71: Northern Operations (c) FM 90-6 (HTF): Mountain Operations e. Reporting Materiel Failure. Report failure of vehicle, body equipment, or kits on Standard Form 368 (Quality Deficiency Report — Equipment Improvement Recommendations) as presented by DA Pam 738-750 and as stated in para. 1-5 of this manual.