TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 354 of 953
4-73. BATTERY CABLE MAINTENANCE This task covers: a. Cleaning and Inspection f. Interconnecting Cable Removal b. Ground Cables Disconnection g. Interconnecting Cable Installation c. Ground Cables Reconnection h. Positive Cable Removal d. Ground Cable Removal i. Positive Cable Installation e. Ground Cable Installation INITIAL SETUP: WARNING • Battery acid (electrolyte) is extremely harmful. Always wear safety goggles and rubber gloves, and do not smoke when performing battery maintenance. Severe injury will result if acid contacts eyes or skin. • Remove all jewelry such as rings, dogtags, bracelets, etc. If jewelry or disconnected battery ground cable contacts battery terminal, a direct short can result, causing instant heating of tools, severe injury to personnel, or damage to equipment. • Always disconnect both ground cables when performing battery maintenance on the “A2” series vehicles. The “A2” series vehicles have a 12 volt cable connected to the positive terminal, which keeps the electrical system charged when only one ground cable is disconnected. Failure to do this may cause injury to personnel, or damage to equipment. • When removing battery cable clamps, disconnect both ground cables first. Ensure all switches are in OFF position before disconnecting. Do not allow tools to come in contact with vehicle when disconnecting cable clamps. A direct short can result, causing instant heating of tools, tool damage, battery damage, or battery explosion. NOTE • Secure all cables to head side of mounting capscrews. • Use this procedure for disconnecting all battery cables. • The following procedure covers disconnection and connection of the ground cable. 1. Inspect cables (1), (2), and (11) for corrosion and cracks. 2. Remove defective cables (1), (2), and (11), or clean with wire brush and baking soda solution. a. Cleaning and Inspection Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Lockwasher (Appendix G, Item 141) Lockwasher (Appendix G, Item 148) Lockwasher (Appendix G, Item 150) Sodium bicarbonate (Appendix C, Item 49) Lubricating oil (Appendix C, Item 33) Silicone compound (Appendix C, Item 48) Manual References TM 9-2320-280-24P Equipment Condition Battery box cover removed (para. 10-35). General Safety Instructions • Wear safety goggles and rubber gloves and do not smoke when performing battery maintenance. • Remove all jewelry. • When removing battery cables, disconnect ground cable first. Ensure all switches are in OFF position before disconnecting. TM 9-2320-280-20-2 4-116 Change 3