ITEM NO. INTERVAL ITEM TO CHECK/ SERVICE PROCEDURE NOT FULLY MISSION CAPABLE IF: Table 2-2. Operator/Crew Preventive Maintenance Checks and Services (Contd). TM 9-2320-386-10 2-39 b. Check cables and posts (4) for tightness, damage, and corrosion. c. Visually check batteries (6) for c. One or more cracked or leaking casing, broken, batteries are missing, burnt, or corroded terminal posts (4). leaking, unserviceable, or will not crank engine. 4 5 6 38 Weekly Batteries a. Remove battery cell caps (5) to check that fluid level is to split-rings. WARNING • Do not smoke, allow open flames, or make sparks when working near batteries. Batteries may explode, causing injury or death to personnel. • Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts battery termi- nal, a direct short may result in instant heating of tools, dam- age to equipment, and injury or death to personnel. NOTE • If fluid level is below split- rings, or is boiling, notify unit maintenance. • When temperature drops below 32°F (0°C), run engine 15 minutes to allow water added to battery by mainte- nance personnel to mix with electrolyte.