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 NOTE Cooling system has an anticorrosion zinc anode in coolant heat exchanger.  Do not use water conditioner. b.     Check coolant in heat exchanger (header) tank.  Level should be less than 1 in below bottom of neck opening.  If necessary, add clean fresh water to bring to required level.  If cap gasket is torn or damaged, repair or replace gasket. c.      With engine idling, check that oil pressure Oil pressure gauge shows positive pressure.  If not, gauge does not stop engine and report problem to shift show positive leader or bargemaster. pressure. d.     With engine idling check that fuel pres- Fuel pressure sure gauge on engine is normal (green) gauge on engine range.  If not, report problem to shift does not read nor- leader or bargemaster. mal (green). e.     With engine idling check that coolant Gauge does not temperature gauge is registering.  As register or tem- engine warms up, gauge should move to perature exceeds higher reading.  If gauge does not register operating limits. or if temperature exceeds operating lim- its, stop engine and report problem to shift leader or bargemaster. 3 Switchboard a.  Check that VOLTMETER reads 440 Vac. Voltmeter does Control Panel If not report to shift leader or bargemaster. not read 440 Vac. b.  Check that FREQUENCY METER reads Frequency meter 60 Hz.  If not, report to shift leader or does not read bargemaster.60 Hz. c.  Check that AMMETER reads 0.  If not, Ammeter does report to shift leader or bargemaster. not read 0. d. In extreme humidity, check for condensa- tion buildup which causes corrosion. Apply low level heat for several hours as soon as condensation becomes notice- able. 9-26