TM 10-3930-638-24&P Para/Malfunction Page COOLING  SYSTEM Engine  overheats Engine  does  not  reach  operating  temperature Cooling system not pressurized GAGES Engine  oil  pressure  gage  does  not  indicate  correct  pressure Fuel  gage  does  not  register Fuel gage does not indicate correct fuel level 2-9.  ENGINE  TROUBLESHOOTING MALFUNCTION TEST  OR  INSPECTION CORRECTIVE ACTION 1. ENGINE HARD TO START OR WILL NOT START Step  1. Step 2. Step 3. Step 4. 2-12/1 2-25 2-12/2 2-26 2-12/3 2-26 2-13/1 2-27 2-13/2 2-28 2-13/3 2-28 WARNING If NBC exposure is suspected, all air filter media should be handled by personnel  wearing  protective  equipment.  Consult  your  unit  NBC  Offi- cer or NBC NCO for appropriate handling or disposal procedures. Check if sir cleaner indicator red flag is in view. a. b. If in view, depress reset button on tip of indicator and check that red flag disappears from view. (If red flag does not disappear from view, replace air cleaner indicator as described in para 2-15c). Crank engine and check if red flag is in view; if red flag is in view, service sir cleaner (para 2-15c). If red flag is not in view, proceed to step 2 below. Check if fuel shut-off valve is in closed position. a. If fuel shut-off valve is in closed position, place in open position as b. If fuel shut-off valve is in open position, proceed to step 3 below. Check if there is fuel in fuel tank. a. If no fuel in fuel tank, fill tank. b. If fuel in fuel tank, proceed to step 4 below. Check for air in fuel system. a. Place ignition switch in ON position. Open bleed valve plug on top of secondary fuel filter allowing air to bleed out of both filters. When fuel, free of bubbles, starts to flow, close bleed valve plug and wipe parts free of fuel. Place ignition switch shown. in OFF position. b. If no air in fuel system, proceed to step 5 below. 2-12   Change   5