Section 3 -- MaintenanceCarrier Air-cooled 7 kW, 12 kW and 15 kW Generators MAINTENENANCEFigure 3.7 - Setting the Spark Plug GapSET PLUG GAP AT 0.76 mm (.030 inch) - 7 kW0.508 mm (.020 inch) - 12 kW & 15 kW3.7 BATTERY MAINTENANCEThe battery should be inspected per the "ServiceSchedule," Section 4.1. The following procedure shouldbe followed for inspection:1. Inspect the battery posts and cables for tightnessand corrosion. Tighten and clean as necessary.2. Check the battery fluid level of unsealed batteriesand, if necessary, fill with Distilled Water Only. Donot use tap water in batteries.3. Have the state of charge and condition checked. Thisshould be done with an automotive-type batteryhydrometer.-A ,A-_Do not dispose of the battery in a fire. Thebattery is capable of exploding./_ A battery presents a risk of electrical shockand high short circuit current. The followingprecautions are to be observed when workingon batteries:• Remove the 7.5A and 15A fuses from thegenerator control panel.• Remove watches, rings or other metal objects;• Use tools with insulated handles;• Wear rubber gloves and boots;• Do not lay tools or metal parts on top of thebattery; and• Disconnect charging source prior to connecting ordisconnecting battery terminals.WARNUNG _°_Do not open or mutilate the battery. Releasedelectrolyte has been known to be harmful tothe skin and eyes, and to be toxic._l The electrolyte is a dilute sulfuric acid that isharmful to the skin and eyes. It is electricallyconductive and corrosive. The followingprocedures are to be observed:• Wear full eye protection and protective clothing;• Where electrolyte contacts the skin, wash it offimmediately with water;• Where electrolyte contacts the eyes, flushthoroughly and immediately with water and seekmedical attention; and• Spilled electrolyte is to be washed down with anacid neutralizing agent. A common practice is touse a solution of 1 pound (500 grams) bicarbonateof soda to 1 gallon (4 liters) of water. Thebicarbonate of soda solution is to be added untilthe evidence of reaction (foaming) has ceased. Theresulting liquid is to be flushed with water and thearea dried._ Lead-acid batteries present a risk of firebecause they generate hydrogen gas. Thefollowing procedures are to be followed:• DO NOT SMOKE when near the battery;• DO NOT cause flame or spark in battery area; and• Discharge static electricity from body beforetouching the battery by first touching a groundedmetal surface._Be sure the AUTO/OFF/MANUAL switch is set tothe OFF position before connecting the batterycables. If the switch is set to AUTO or MANUAL,the generator can crank and start as soon asthe battery cables are connected._Be sure the utility power supply is turned offand the 7.5A and 15A fuses are removed fromthe generator control panel, or sparking mayoccur at the battery posts as the cables areattached and cause an explosion.3.8 COOLING SYSTEMAir inlet and outlet openings in the generatorcompartment must be open and unobstructed forcontinued proper operation. This includes suchobstructions as high grass, weeds, brush, leaves andsnow.Without sufficient cooling and ventilating air flow, theengine/generator quickly overheats, which causes it toquickly shut down. (See Figure 3.8 for vent locations.)Carrier 1 5