TM 9-6115-658-13&P 2-15 Table 2-2.  Operator Preventive Maintenance Checks and Services – (continued) ITEM NO. INTERVAL LOCATION PROCEDURE NOT FULLY MISSION CAPABLE IF: ITEM TO CHECK/SERVICE 12 Before SWITCH BOX ASSEMBLY    (POWER PLANTS ONLY) a. Check for loose or missing mounting           hardware.  Refer to Figure 2-6. b. Check for damaged indicator lights. Refer to Figure 2-1. c.  Check hinges and clamping catches. d. Check for loose or damaged switches. e. Check output terminals and connectors for damaged or missing hardware.  Refer to   Figure 2-6. Two or more mounting bolts missing. Indicator lights are damaged. Switches loose or damaged. Output terminals or connectors will not properly secure load cables. 13 Before HYDRAULIC BRAKES Check for leakage of brake fluid from master cylinder (19), hydraulic brake lines and fittings (20), and backing plates (21). Brake system has any leak.