Generac 004370-2, 004188-1, 004475-1, 004371-2 Engine Heater, Cooling System, Checking Fluid Levels

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Section 4 — Maintenance

Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators

ENGINE HEATER

Your Generac standby generator comes equipped with a block heater (Figure 4.1), similar to the block heaters used in automotive applications. The block heater is wired to a grounded plug.

E. EVERY 500 OPERATING HOURS

1.Service air cleaner. 2.Check starter.

3.Check engine DC alternator.

Figure 4.1 - 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.

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.

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.

COOLING SYSTEM

Air intake and outlet openings in the generator com- partment must be open and unobstructed for continued proper operation. This includes such obstructions as high grass, weeds, brush, leaves and snot.

Without sufficient cooling and ventilating air flow, the engine/generator quickly overheats, which causes it to shut down. (See Section 9 for installation drawings and vent locations.)

The exhaust system parts from this product get extremely hot and remains hot after shutdown. High grass, weeds, brush, leaves, etc. must remain clear of the exhaust. Such materials may ignite and burn from the heat of the exhaust system.

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.

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.)

14 Generac® Power Systems, Inc.

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 4.2) 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.

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Contents Power SYSTEMS, INC Authorized Service Dealer Location Operation and MaintenanceHOW to Obtain Service IntroductionIntroduction IFC Safety Rules General Hazards Electrical Hazards Transfer Switch GeneratorAutomatic System Operation Generator AC Connection SystemsHigh Coolant Temperature Switch LOW OIL Pressure SwitchLOW Coolant Level Switch Engine Protective DevicesUnpacking SpecificationsLifting the Generator Torque Specifications Before InstallationFuel Consumption Engine OIL RecommendationsStandby Generator Installation Generator LocationOther Published Standards Nfpa StandardsBasic Standby Electric System Total Circuit Isolation MethodGrounding the Generator Emergency Circuit Isolation MethodBattery Installation Transfer Switch Start Signal ConnectionsVented Batteries Preparation Before START-UP Using a Standard GTS Transfer SwitchPrior to Initial START-UP Control Console Components Meter Reading Selector Switch SET Exercise Time SwitchManual Transfer and Start UP Retransfer and Shutdown Automatic OperationEngine Heater Cooling SystemOverload Protection for Engine DC Electrical System Checking Fluid LevelsMaintenance OWNER/OPERATOR can Perform Changing the Engine AIR Cleaner Coolant ChangeMiscellaneous Maintenance Cleaning the GeneratorBattery Battery ReplacementTroubleshooting Points Service Maintenance Interval Information Level Maintenance Level Electrical Data Electrical Data Electrical Data AC Outlet Outlet AC Circuit FED Ground Wire Assembly BRACE, SideBumper DOOR, EnclosureGenerac Power Systems, Inc Washer Nylon Hinge Slip Male LHHinge Slip Female LH Hinge Slip Male RHGenerac Power Systems, Inc CMA BOX Assembly Rocker Switch DpstSWITCH, Selector AMP/VOLT SWITCH, Toggle DpdtGenerac Power Systems, Inc Switch 6A AMP/V Selector Harness Wiring 1.5LDECAL, TRANS. Switch Conn Switch Dpst 5 125V SPD RckrGenerac Power Systems, Inc Tank Coolant Recovery Bracket Coolant Recovery TankSupport Radiator Radiator 1.5LGenerac Power Systems, Inc Venturi 1.5L Guard FANHose RES 5/8 RIA 250F NUT HEX M6 -1.0 G8 YEL CHRBASE, Mounting ISOLATOR-VIBRATIONISOLATOR, Vibration Flat WASHER-M8Dampener Vibration Washer Flat M8Earth Strap Washer Shakeproof EXT 5/16 STLMuffler W/RAIN Shld Mufflr Strap 6IN DIAElbow 90 DEG 2 NPT Nipple TOE 2 NPT X 4.5 BLK IronManifold Exhaust 1.5L Nipple TOE 1.5 NPT X 6.5 BL IronPipe Exhaust Flex Pipe ExhaustSilkscreen P Panel Cover BQ Circuit BreakerBracket Mounting Circuit Breaker Circuit Breaker 70 X 2 240V 39782 BrktHarness CMA Wire Assy Home Stdby LogicDECAL, CMA Label PP Logic ASM 50/60HZASSY,WIRE#16 RED Bolt Battery Hold DownBAR Battery Holddown Battery Post Cover RED+Housing Governor Connector Connector Interface AssemblyCover Connector Housing Assembly Carburator LinkageGenerac Power Systems, Inc Housing Blower Assy Rotor 10KWAssy Rotor 15KW Assy Rotor 20KWGenerac Power Systems, Inc Cover AIR Cleaner Weldment Mounting BaseFlange Fuel Inlet Solenoid GAS FuelGenerac Power Systems, Inc Switch OIL Pressure ARM Adjust AlternatorGround Wire Starter ENGINE-1.5LInstallation Air Outlet Air Intake Installation Air Intake MANUFACTURER’S Emission Control System Warranty Coverage Your Warranty Rights and ObligationsPURCHASER’S/OWNER’S Warranty Responsibilities Emission Control System Warranty Emission Related Parts Include the FollowingWarranty Schedule This Warranty Shall not Apply to the Following

004371-2, 004188-1, 004474-1, 004475-1, 004370-2 specifications

Generac Power Systems is renowned for its commitment to providing reliable power solutions, and their various models, including the Generac 004189-1, 004370-2, 004475-1, 004474-1, and 004188-1, showcase the company’s innovative engineering and technology. Each of these models is designed to meet diverse energy needs, ensuring homeowners and businesses can maintain power during outages or in remote locations.

The Generac 004189-1 is an essential model in the lineup known for its robust construction and user-friendly interface. It features a powerful engine, ensuring reliable power output and efficient fuel consumption. Additionally, its lightweight design makes it portable, allowing easy relocation to different sites. The model integrates advanced technology for automatic voltage regulation, safeguarding sensitive electronics while operating.

Moving on to the Generac 004370-2, this model emphasizes advanced start-up technology. It is equipped with a reliable electric start feature, minimizing the effort required to power up the generator. Its noise-dampening design significantly reduces sound levels, making it ideal for residential use without causing disturbances to neighbors. The unit also includes a durable metal enclosure that helps protect the generator from the elements and increases its lifespan.

The Generac 004475-1 model stands out for its enhanced fuel efficiency and low emissions. This eco-friendly design adheres to strict emissions regulations, making it a suitable choice for environmentally conscious users. Its intuitive control panel provides easy monitoring of power output, fuel levels, and maintenance needs, ensuring users can efficiently manage their energy requirements.

Similarly, the Generac 004474-1 exemplifies convenience and performance with its dual fuel capability, allowing it to operate on both gasoline and propane. This flexibility ensures users can easily switch fuels based on availability and cost-effectiveness. The model also boasts an extended runtime, capable of powering essential appliances and systems for prolonged periods during outages.

Finally, the Generac 004188-1 emphasizes ease of use, featuring a comprehensive user manual and a straightforward assembly process. The model provides ample power capacity, making it excellent for both emergency back-up and recreational activities. Its compact design allows storage in confined spaces, while its efficient cooling system prevents overheating during extended use.

Overall, these Generac models reflect the company's dedication to innovation, quality, and user satisfaction. With features aimed at enhancing convenience, performance, and environmental responsibility, they cater to the varying power demands of modern users.
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