Fuel pressure gauge. Gauge is marked with red zone on the left, an overlapping red and green section in the
middle and a green zone on the right. When fuel filter becomes clogged, needle will move to red zone. When
needle indicates in the center section of red and green, primary fuel filter must be washed and secondary fuel
filter element replaced.
Hour service meter. Located on end of governor, this device indicates number of hours engine has operated.
Water temperature gauge. Right-hand gauge on instrument panel indicates temperature of coolant circulating
in engine block Bottom scale reads in degrees Fahrenheit from left to right (1 O0-140-180-200), and gauge is
marked in red from 200 to right end of scale. A thermostat in dosed-circuit portion of system keeps coolant
within designed limits.
Coolant filler cap. On top of coolant tank When removed, shows level of coolant in closed coolant portion of
engine 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 procedures
In ROWPU space, make sure EMS is operating by pushing up on monitor controller left of monitoring
processor. 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.
Check maintenance records to make sure all required maintenance checks and services have been
In void 4, conduct walk-around inspection of generator set to detect visible deficiencies that, if not
corrected, could become hazardous to people or equipment.
At operating temperatures, engine coolant Is hot and under pressure. It also contains alkaline
materials harmful to eyes and skin. To avoid personal Injury, check coolant level only when engine
Is stopped and filler cap Is cool enough to be touched with a bare hand. Should engine coolant
come In contact with eyes or skin, Immediately flush affected area with dean water and seek
medical assistance If necessary.
Sensing element must be submerged In coolant to operate. If coolant Is low, engine can overheat and
automatic shutoff will not function to prevent damage to engine.
When engine is cool, slowly open coolant tank filler cap. Check that engine coolant is not more than
112 inch below top of filler pipe. I it is, fill to required level with dean fresh water (low in scale-forming minerals
but not softened water) and cooling system conditioner. Always add conditioner to water. Never use plain
water. Conditioner should be 3 percent by volume of total coolant F - about 1/2 pint of conditioner per 2
gallons of water. If cap gasket is tom or damaged, repair or replace gasket.
Check that crankcase oil shows between ADD and FULL marks on dip stick If oil shows below ADD
mark, add oil at oil fill, ;coated above oil dipstick on accessory end of engine. Oil must meet engine service
classic CD (MIL-L-2104D) or CDfrO-2. Diesel engines onboard use 15W40 as standard crank case lubricant
for 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, and
electrolyte covers plates.