TM 55-1930-209-14&P-9-1c. Fuel pressure gauge. Gauge is marked with red zone on the left, an overlapping red and green section in themiddle and a green zone on the right. When fuel filter becomes clogged, needle will move to red zone. Whenneedle indicates in the center section of red and green, primary fuel filter must be washed and secondary fuelfilter element replaced.d. Hour service meter. Located on end of governor, this device indicates number of hours engine has operated.e. Water temperature gauge. Right-hand gauge on instrument panel indicates temperature of coolant circulatingin engine block Bottom scale reads in degrees Fahrenheit from left to right (1 O0-140-180-200), and gauge ismarked in red from 200 to right end of scale. A thermostat in dosed-circuit portion of system keeps coolantwithin designed limits.f. Coolant filler cap. On top of coolant tank When removed, shows level of coolant in closed coolant portion ofengine cooling system.4-10.2 SR4 generator controls. SR4 generator controls are on the main switdhboard and are discussed in Chapter 2.4-11. Prestart proceduresa. In ROWPU space, make sure EMS is operating by pushing up on monitor controller left of monitoringprocessor. If monitor does not come on, turn it on with switch beneath the screen. For more details on EMS,see TM 55-1930-209-14 & P-l1.b. Check maintenance records to make sure all required maintenance checks and services have beencompleted.c. In void 4, conduct walk-around inspection of generator set to detect visible deficiencies that, if notcorrected, could become hazardous to people or equipment.WARNINGSAt operating temperatures, engine coolant Is hot and under pressure. It also contains alkalinematerials harmful to eyes and skin. To avoid personal Injury, check coolant level only when engineIs stopped and filler cap Is cool enough to be touched with a bare hand. Should engine coolantcome In contact with eyes or skin, Immediately flush affected area with dean water and seekmedical assistance If necessary.CAUTIONSensing element must be submerged In coolant to operate. If coolant Is low, engine can overheat andautomatic shutoff will not function to prevent damage to engine.d. When engine is cool, slowly open coolant tank filler cap. Check that engine coolant is not more than112 inch below top of filler pipe. I it is, fill to required level with dean fresh water (low in scale-forming mineralsbut not softened water) and cooling system conditioner. Always add conditioner to water. Never use plainwater. Conditioner should be 3 percent by volume of total coolant F - about 1/2 pint of conditioner per 2gallons of water. If cap gasket is tom or damaged, repair or replace gasket.e. Check that crankcase oil shows between ADD and FULL marks on dip stick If oil shows below ADDmark, add oil at oil fill, ;coated above oil dipstick on accessory end of engine. Oil must meet engine serviceclassic CD (MIL-L-2104D) or CDfrO-2. Diesel engines onboard use 15W40 as standard crank case lubricantfor normal temperatures. If temperatures in voids consistently exceed 1200F, use SAE 40.f. Check that batteries are dean of corrosion, all cable connections tight and covered with anti-c n grease, andelectrolyte covers plates.4-4
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