TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 186 of 1176
MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ALL VEHICLE ELECTRICAL SYSTEMS INOPERATIVE 1. Open door of battery compartment. Loosen two thumbscrews and slide batteries onto running board. Visually check connections of battery cables (WP 0127 00). 2. Visually check batteries for cracks and leaks. Check terminal posts for corrosion and breaks (TM 9-6140-200-14). Test 1. Check specific gravity of each cell before adding distilled water. 1. Using optical battery tester, which requires no temperature compensation, check specific gravity of electrolyte in each cell. 2. Check specific gravity of cells after battery has been charged (TM 9-6140-200-14). Ensure battery cables are correctly connected to battery (WP 0126 00). 1. If any battery is cracked, leaking, or has broken terminal posts, replace battery (WP 0127 00). 2. If terminal posts or cables are corroded, use soda-and-water solution to neutralize battery acid. 3. Remove battery ground cable no. 7 from negative post first. Remove cable clamps from battery posts. Clean posts and mating surfaces to bright metal (WP 0126 00). 4. If battery terminals are clean and malfunction still exists, go to test 1. If specific gravity of any cell is below 1.225, battery must be replaced or recharged. Add distilled water as necessary after checking battery. Charge battery as necessary. (TM 9-6140-200-14). 1. If specific gravity of any cell does not increase to 1.280 (full charge) in 8 hours of charging, replace battery (WP 0127 00). 2. All cells in a battery must test within 0.025 point of one another. If specific gravity of any cell is lower than 1.225 (corrected to 80 °F [27 °C] if necessary) after 8 hours of charging, replace battery (WP 0127 00). TM 9-2320-361-24-1 0012 00 0012 00-2 BATTERY AND CHARGING SYSTEM TROUBLESHOOTING (Contd) Table 1. Battery System Troubleshooting Procedure.