TM 55-1930-209-14&P-19 Table 9-3.  Preventive Maintenance Checks and Services for Electrical Power Systems(Continued) B -  Before D -  During A -  After H -  Hourly Interval INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A H AS NECESSARY 125 hrs NOTE If compressed air does not clean element, wash in a warm soapy water solution.  Rinse and blow dry. 6) Inspect filter element by placing a light inside a clean, dry element.  Check for rips, tears, or holes in element mate- rial.  If damaged, discard and obtain new element. 7) Remove covering from inlet inside air cleaner body. 8) Install clean or new element.  Place cover on body and tighten in place. NOTE Every 125 hours of operation or every 3 months (whichever comes first). 125 hrs b.     Check zinc anode (zinc pencil) in power end of heat exchanger on right side of engine.  Unscrew cover.  Remove anode and compare to new anode.  If 50 percent or more has been consumed, replace anode. 125 hrs c.     Check engine for oil, fuel, coolant, and   Class III leaks. seawater leaks.  Tighten as necessary. 125 hrs d.     Check exterior of engine for loose screws, nuts, bolts, fittings, and attach- ments.  Tighten as necessary. 125 hrs   e.     Check connections to generator and Connections are make sure they are tight, but not rubbing rubbing or are or frayed.  Correct as necessary. frayed. f.   Remove red tag from SSG switchboard panel. 250 hrs NOTE Every 125 hours of operation or every 6 months (whichever comes first). 9-34