TM 10-3930-653-14&P Operator/Crew Preventive Maintenance Checks and Services NOTE: Within designated interval, these checks are to be performed in the order listed. B—Before D—During W—Weekly Interval ITEM TO BE INSPECTED PROCEDURE: Item CHECK FOR AND HAVE REPAIRED, Equipment Is Not Ready/ No. B D W FILLED OR ADJUSTED AS NEEDED. Available If: 17. BATTERY WARNING DO NOT SMOKE, OR ALLOW ANY FLAME OR SPARK IN THE VICINITY WHILE CHECKING OR FILLING THE BATTERY.  THE BATTERY GENERATES HYDROGEN, A HIGHLY EXPLO- SIVE GAS. • a. Check electrolyte level.  If level of electrolyte is below the top of the battery plates, notify Organizational Maintenance. • b. Check battery and battery box for Battery missing/engine corrosion and obvious damage. will not crank. B-37