Generac 004373-1, 004626-0 OUT of Service Procedure, Removal From Service, Return To Service

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Section 4 — Maintenance

Guardian Liquid-cooled 40 kW Generator

￿4.10.2 Rodent Protection

The intrusion of rodents into the generator set can cause a wide range of problems, from failure of the unit to start, to personal injury and, in extreme circum- stances, short circuit or fire. Although the unit was designed to limit this problem, further precautions can be taken by the owner to help minimize both the chance of rodent entry and the extent of any damage. The fol- lowing inspection should be performed.

1.The base frame of the unit contains an optional fuel inlet location and four lifting holes that are capped at the factory. These caps are sometimes removed for transportation during installation but always should be replaced afterwards. Check that they are secured in place. The same applies for any access ports in the roof of the enclosure. If any of these caps are missing, contact a Generac/Guardian Authorized Dealer.

2.Inside the generator set, the chance of rodent entry into the control panel is greatly reduced by the inclu- sion of adjustable wire connectors. Check that the wire connector screws are tight, thus closing off any gap between the access holes and the wires.

4.11 OUT OF SERVICE PROCEDURE

￿4.11.1 Removal From Service

If the generator cannot exercise every seven days, and it is to be out of service longer than 90 days, prepare the generator for storage as follows:

1.Start the engine and let it warm up.

2.Close the fuel shutoff valve in the fuel supply line and allow the unit to shut down.

3.Once the unit has shut down, it will signal a fault on the control panel.

4.Set the Auto/Off/Manual switch to OFF and turn off the utility power to the transfer switch.

5.While the engine is still warm from running, drain the oil completely. Refill the crankcase with SAE 15W-40 oil having API Service Class SG, SH or SJ.

6.Attach a tag to the engine indicating the viscosity and classification of the oil in the crankcase.

7.Remove the spark plug(s) and spray fogging agent into the spark plug(s) threaded openings. Reinstall and tighten the spark plug(s).

8.Remove the battery and store it in a cool, dry room on a wooden board. Never store the battery on any concrete or earthen floor.

9.Clean and wipe the entire generator.

￿4.11.2 Return To Service

To return the unit to service after storage, proceed as follows:

1.Verify that utility power is turned off to the transfer switch and that the Auto/Off/Manual switch is set to OFF.

2.Check the tag on the engine for oil viscosity and classification. Verify that the correct recommended oil is used in engine. See Section 4.2.1 (Page 14). If necessary, drain and refill with the proper oil.

3.Check the battery. Fill all cells to the proper level with distilled water. DO NOT USE TAP WATER IN THE BATTERY. Remove the battery before charging. Recharge the battery to 100 percent state of charge, or, if defective, replace the battery with a 12-volt DC Group 27F battery rated for 90 amp hours (part # 058665).

4.Clean and wipe the entire generator.

5.Reconnect the battery. Observe battery polarity. Damage may occur if the battery is connected incor- rectly.

6.Open the fuel shutoff valve.

7.Start the unit by moving the Auto/Off/Manual switch to MANUAL. Allow the unit to warm up thoroughly.

8.Stop the unit and set the Auto/Off/Manual switch to AUTO.

9.Turn on the utility power to the transfer switch.

10.The generator is now ready for service.

18 Generac® Power Systems, Inc.

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Contents Power SYSTEMS, INC Introduction Authorized Dealer LocationSafety Rules General Information InstallationMaintenance Section Installation Drawings 56-57 Warranty Back CoverGeneral Hazards Electrical Hazards UNPACKING/INSPECTION GeneratorGenerator AC Connection Systems Automatic System OperationEngine Protective Devices SpecificationsMain Circuit Breaker Fuel Requirements Recommendations Generator and Load CompatibilityEngine Conversion to LP GAS VaporAIR Fuel Ratio Controller CoolantEmissions Control System Standby Generator Installation Basic Standby Electric SystemNfpa Standards Other Published StandardsTransfer Switch Start Signal Connections GTS Type SwitchPre-Packaged Type Switch Emergency Circuit Isolation MethodVented Batteries Battery InstallationPreparation Before START-UP Prior to Initial START-UP Using the AUTO/OFF/MANUAL Switch OFF Position Manual PositionAutomatic Transfer Operation Sequence of Automatic OperationWeekly Exercise Cycle Checking the Engine OIL LevelOil and Filter Change Procedure Changing the Engine AIR CleanerChanging the Engine OIL and Filter Engine Oil RecommendationsBattery Maintenance Spark PlugsMiscellaneous Maintenance Cleaning the GeneratorOverload Protection for Engine DC Electrical System DC FuseReturn To Service OUT of Service ProcedureRemoval From Service Service Schedule SYSTEM/COMPONENT Procedure FrequencyTroubleshooting Guide Problem Cause CorrectionElectrical Data Section Power Systems, Inc Generac Power Systems, Inc Electrical Data Electrical Data Electrical Data Wiring Diagram RED Brush Units DPEPanel Face Switch Rocker Dpst 125V SPD Switch TOG Dpdt 15/10 SPSwitch Selector 6A AMP/V Part of Control Panel Wire HarnessGenerators CONTROLLER, B-C #DPG-2103 ScreenCover Plate AVR Cover Plate EgovAssembly Motor Stepper Connector Interface AssemblyHousing Governor Connect Cover Conn HousingBASE, Mounting ASSEMBLY, 4.3L Assembly Groundwire 10/3/8Plug Button 3 DIA DIRECT-COUPLED4640 31 33 Switch OIL Pressure DC Alternator AssemblyEngine 4.3L GM Pulley TensionerExploded Views and Parts Lists Retainer Plug Wires Retainer Spark Plug WiresWires Spark Plug 4.3L Connector C/C VentAdd item #42 vinyl trim as shown FAN Assembly 390 SAE DD Assembly Brush & ShuntAssembly Scroll 390 SAE Carrier Rear BearingAssembly Cover Access Duct BottomShakeproof INT M6 SS Duct Front PanelTank Coolant Recovery Bracket Coolant Recovery TankRadiator 14 FIN/INCH Venturi 16 DIA 35KWPlate AIR Cleanr Bottom Plate AIR Cleaner TOPGasket AIR Cleaner Gasket Carburetor AdaptorMixer only Natural GAS NPT XHose 1 in ID LP GAS Actuator Throttle 42MMSupport Solenoid NAT GAS Nipple TOE 3/4 NPT XNipple Pipe 3/4NPTX4.5 BLK IRN Hose 1IN ID LP GASDECAL,INLET Pressure Regulator N/G R600SLUG Rngtng INS Hose Connection TEE HEATER, Engine 1800WHEATER, Engine 2000W HOSE, Preformed Block HeaterBattery 12VDC 90-AH 27F Optional Hold Down BatteryCable Battery Black #1 X Cable Battery RED #1 X11 12 Cover Lower Connection BOX Bushing Snap SB-2.5-31Relay Solenoid 12VDC PNL MNT Transformer 200A to 5A 5VAExploded Views and Parts Lists Tube Straight a Group Muffler Catalyst 4.3LMounting Band A-GRP Catalyst Shield Heat Crossover 4.3LMuffler 2-1/2 INLET/OUTLET Clamp Band MufflerGuardian Liquid-cooled 40 kW Generators Installation Drawings 12V Battery see Note Lifting EYE Places Warranty Schedule This Warranty Shall not Apply to the Following