Operating Checks The operator can use his or her senses to detect many potential problems. The operator may smell

overheated insulation, hear peculiar noises, see an indicating light signaling a fault, or feel unusual vibrations from the generator or engine. Operator maintenance requirements vary with different types of generators. General operator inspections and tasks are as follows:

1. Oil level. Frequently, check the appropriate oil level. Add oil as needed to maintain the required level. (Intervals between oil checks and changes will vary for abnormal operation and severe conditions.)

2. Batteries. Check the electrolyte level and add water to maintain the required level.

3. Exhaust and breather systems. 

WARNING Components of both the exhaust and crankcase breather systems (muffler, pipe, tube, and hose) become extremely hot during generator set operation. Do not handle any of them while they are hot. Inspect the muffler for holes, dents, signs of extreme corrosion, and metal deterioration. Also, check

Figure 3-17.- Fuel filler cap and strainer

for loose or broken clamps and general secureness of the muffler. Check all pipes and ducts associated with the exhaust system for holes, dents, signs of extreme corrosion, and metallic deterioration. Also, check for loose and broken bolts. Check the exhaust ram cap for signs of corrosion and freedom of movement. Check the breather tube and associated hoses for loose clamps, holes in the hoses, and loose bolts.

4. Cooling system. Check all hoses for cracks, cuts, signs of deterioration, and bulges (indicating the possibility of future rupture). Check all clamps for tightness and signs of corrosion.

WARNING Do not attempt to remove the radiator cap until the radiator has cooled to a point where there will be no built-up steam pressure. Failure to observe this warning could result in second-or third-degree burns.