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Figure 9 -“Set Exercise” Switch ENGINE HEATER Your Generac standby generator comes equipped with a block heater (Figure 10), similar to the block heaters used in automotive applications. Figure 10 -Engine Block Heater Refer to applicable wiring diagram(s) and electrical schematic(s) at back of manual for wiring connections. Customer supplies a 120V 15A Utility fed circuit for the block heater. 14 Generac® Power Systems, Inc. Generac® Power Systems, Inc. 15 MAINTENANCE PERFORMED BY AUTHORIZED SERVICE FACILITIES A. EVERY THREE MONTHS 1.Check battery state of charge and condition. 2.Inspect and test fuel system. 3.Check transfer switch. 4.Inspect exhaust system. 5.Check engine ignition system. 6.Check fan belts. B. ONCE EVERY SIX MONTHS 1.Test Engine Safety Devices (low oil pressure, low coolant level, high coolant temperature). C. ONCE ANNUALLY 1.Test engine governor; adjust or repair, if needed. 2.Clean, inspect generator. 3.Flush cooling system. D. FIRST 100 OPERATING HOURS 1.Change engine oil and oil filter. (After initial change, service engine oil and filter at 150 operating hours or 6 months, whichever comes first.) 2.Retorque cylinder head. (See Torque Specs, page 7.) 3.Retorque intake and exhaust manifold. (See Torque Specs, page 7.) E. EVERY 500 OPERATING HOURS 1.Service air cleaner. 2.Check starter. 3.Check engine DC alternator. F. EVERY 800 OPERATING HOURS 1.Retorque cylinder head. (See Torque Specs, page 7.) 2.Retorque intake and exhaust manifold. (See Torque Specs, page 7.) 3.Check engine compression. 4.Check valve clearance. OVERLOAD PROTECTION FOR ENGINE DC ELECTRICAL SYSTEM Engine cranking, start up and running are controlled by a solid state Engine Controller circuit board. Battery voltage is delivered to that circuit board via a 30 amp fuse. These overcurrent protection devices will open if the circuit is overloaded. CAUTION! If a circuit breaker opens or a fuse element melts, you should find the cause of the overload before resetting the circuit breaker or replacing the fuse. CHECKING FLUID LEVELS CHECK ENGINE OIL Check engine crankcase oil level (Figure 11) at least every 20 hours of operation, or prior to use. • Remove oil dipstick and wipe dry with a clean, lint-free cloth. • Install oil dipstick, then remove again. • Oil should be between FULL and ADD marks. • If oil level is below the dipstick ADD mark, remove oil fill cap. Add the recommended oil to bring oil level up to the FULL mark. DO NOT FILL ABOVE THE “FULL” MARK. See page 6 for recommended oils. Figure 11 - Oil Dipstick and Oil Fill Cap c ap BATTERY FLUID Check battery electrolyte fluid at least once weekly. Fluid should cover separators in all battery cells. If fluid level is low, add distilled water to cover tops of separators. DO NOT USE TAP WATER IN BATTERY. ENGINE COOLANT Check coolant level in coolant recovery bottle. See Specifications, page 8 • Add recommended coolant mixture as necessary. • Periodically remove radiator pressure cap to make sure the coolant recovery system is functioning properly. Coolant should be at bottom of radiator filler neck. If coolant level is low, inspect gasket in radiator pressure cap. Replace cap, if necessary. To have pressure cap tested, contact an authorized Generac Service Facility. Inspect cooling system and coolant recovery system for leaks. OIL FILL CAP OIL DIPSTICK Section 4 — Maintenance Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators 16 Generac® Power Systems, Inc. MAINTENANCE OWNER/OPERATOR CAN PERFORM CHECK ENGINE OIL LEVEL Refer to “Checking Fluid Levels” on page 15. CHECK BATTERY • Check battery fluid level each week as outlined under “Check Fluid Levels”. • Check battery cables for condition, tightness, corrosion or damage. Clean, tighten or replace as necessary. EXERCISE SYSTEM Start the generator engine at least once every seven days and let it run at least 20 minutes. See page 14, “Weekly Exercise Cycle”. INSPECT COOLING SYSTEM • Inspect engine cooling system at least once each month. • Check hoses for damage, deterioration, leaks, etc. Correct any discrepancies found. • Check hose clamps for tightness. CHECK ENGINE COOLANT LEVEL See “Checking Fluid Levels” on page 15. PERFORM VISUAL INSPECTION Complete a thorough visual inspection of the entire engine-generator monthly. Look for obvious damage, loose, missing or corroded nuts, bolts and other fasteners. Look for fuel, oil or coolant leaks. INSPECT EXHAUST SYSTEM Inspect the exhaust system at least once every three months. Check all exhaust system pipes, mufflers, clamps, etc. for condition, tightness, leaks, security, damage. CHECK FAN BELT • Inspect fan belts every three months. Replace any damaged, deteriorated, worn or otherwise defective belt. • Check fan belt tension. Thumb pressure, exerted midway between pulleys, should deflect about 3/8 to 3/4 inch. Adjust belt tension as required. INSPECT ENGINE GOVERNOR Visually inspect electronic governor. DANGER: Do not attempt to adjust the governor. Only qual...

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