Manuals / Generac Power Systems / Lawn and Garden / Portable Generator

Generac Power Systems 04758-0 Service Schedule, ATTENTION It is recommended that all service work

Models: 04760-0 04759-0 04758-0

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Section 4 — Maintenance

Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators

4.13 SERVICE SCHEDULE

ATTENTION: It is recommended that all service work

be performed by your nearest Generac Authorized Dealer.

SYSTEM/COMPONENT			PROCEDURE		FREQUENCY
X = Action	Inspect		Change	Clean	W = Weekly
R = Replace as Necessary					M = Monthly
* = Notify Dealer					Y = Yearly
if Repair is Needed.
FUEL
Fuel lines and connections*	X				M
LUBRICATION
Oil level	X				M
Oil			X		AFTER BREAK-IN,
					AND Y
Oil filter			X		AFTER BREAK-IN,
					AND Y
COOLING
Enclosure louvers	X			X	W
BATTERY
Remove corrosion,	X			X	M
ensure dryness
Clean and tighten	X			X	M
battery terminals
Check charge state	X		R		EVERY 6 M
Electrolyte level	X		R		EVERY 6 M
(unsealed batteries only)*
ENGINE AND MOUNTING
Air cleaner	X		R		Y
Spark plug(s)	X		R		Y
GENERAL CONDITION
Vibration, Noise, Leakage,	X				M
Temperature*
COMPLETE TUNE-UP*	TO BE COMPLETED BY A GENERAC				Y
		AUTHORIZED DEALER

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Generac Power Systems 04758-0, 04759-0, 04760-0 Service Schedule, ATTENTION It is recommended that all service work

Contents

Models 04758-0 6 kW NG, 7 kW LP 04759-0 12 kW NG, 12 kW LP 04760-0 13 kW NG, 15 kW LPDEADLY EXHAUST FUMES. OUTDOOR INSTALLATION ONLY Not intended for use as Primary Power in place of utility‹ CONTENTS ‹ OPERATION AND MAINTENANCE‹ HOW TO OBTAIN SERVICE INTRODUCTIONIntroduction GENERAL HAZARDS DANGERDespite the safe design of this generator Parts of the generator are rotating and/or hotELECTRICAL HAZARDS FIRE HAZARDSEXPLOSION HAZARDS ‹ STANDARDS INDEX1.1 UNPACKING/INSPECTION 1.2 PROTECTION SYSTEMS1.3 SYSTEM SET LED DANGER1.4 YOUR GENERATOR Figure 1.1 - 7 kW, Single Cylinder GH-410 EngineFigure 1.2 - 12 kW/15 kW, V-twin GT-990 Engine 1.5 SPECIFICATIONS ‹ 1.5.1 GENERATOR‹ 1.5.2 ENGINE Section 1 - General Information1.8 RECONFIGURING THE FUEL SYSTEM 1.6 FUEL REQUIREMENTS AND RECOMMENDATIONS1.7 FUEL CONSUMPTION DANGER1.9.2 TRANSFER SWITCH 1.9.2.1 7 kW, 12 kW and 15 kW Units 1.9 LOCATION1.9.1 GENERATOR Figure 1.4 - Demand Regulator1.10 BATTERY INSTALLATION 1.11 THE BATTERYFigure 1.5 - Battery Cable Connections Use tools with insulated handles Wear rubber gloves and boots2.2 CHECK TRANSFER SWITCH OPERATION 2.1 BEFORE INITIAL START-UP2.3 ELECTRICAL CHECKS The following procedures are to be observed2.4 GENERATOR TESTS UNDER LOAD 2.5 CHECKING AUTOMATIC OPERATION2.6 ADJUSTING THE REGULATOR NATURAL GAS ONLY 2.7 ENGINE GOVERNOR ADJUSTMENTFigure 2.2 - Placement of Regulator 2.7.1 7 KW UNITS2.8 VOLTAGE REGULATOR ADJUSTMENT 3.1 BREAK-IN PROCEDUREFigure 2.3 - Engine Governor Adjustment Figure 2.5 - Voltage Adjustment Potentiometer3.3 AUTOMATIC TRANSFER OPERATION 3.4 SEQUENCE OF AUTOMATIC OPERATION‹ 3.2.1 “AUTO” POSITION ‹ 3.2.2 “OFF” POSITION‹ 3.5.2 TRANSFER BACK TO UTILITY POWER SOURCE 3.5 MANUAL TRANSFER OPERATIONFigure 3.2 - Manual Transfer Switch Operation ‹ 3.5.1 TRANSFER TO GENERATOR POWER SOURCE3.6 SETTING THE EXERCISE TIMER ‹ 3.7.1 LOW OIL PRESSURE SWITCH‹ 3.7.2 HIGH TEMPERATURE SWITCH Figure 3.3 - Low Oil Pressure and High Temperature Switches4.1 FUSE 4.2 CHECKING THE ENGINE OIL LEVEL4.3 CHANGING THE ENGINE OIL Oil Dipstick and Fill4.5 CHANGING THE ENGINE AIR CLEANER ‹ 4.3.2 OIL CHANGE PROCEDUREFigure 4.6 - 7 kW, Engine Air Cleaner Location Figure 4.7 - 12 kW and 15 kW Engine Air Cleaner4.7 BATTERY MAINTENANCE Figure 4.8 - Setting the Spark Plug Gap4.6 SPARK PLUGS Use tools with insulated handles Wear rubber gloves and boots4.8 ADJUSTING VALVE CLEARANCE Figure 4.10 - Valve Clearance Adjustment4.9 COOLING SYSTEM Figure 4.9 - Cooling Vent Locations4.12 OUT OF SERVICE PROCEDURE ‹ 4.12.2 RETURN TO SERVICE‹ 4.12.1 REMOVAL FROM SERVICE 4.10 ATTENTION AFTER SUBMERSION4.13 SERVICE SCHEDULE ATTENTION It is recommended that all service workbe performed by your nearest Generac Authorized Dealer 5.1 TROUBLESHOOTING GUIDE PROBLEMCAUSE CORRECTIONSection 6 - Electrical Data Section 6 - Electrical Data CUSTOMERCONNECTION CONTROL PANEL BOXDIAGRAM KEY BA - BRUSH ASSEMBLY BCR - BATTERY CHARGE RELAY Section 6 - Electrical DataSection 6 - Electrical Data Wiring Diagram - 7 kW - Drawing No. 0D9013 ENGINE WIRINGSection 6 - Electrical Data Guardian Air-cooled 7 kW, 12 kW and 15 kW GeneratorsSection 6 - Electrical Data CONTROL PANEL BOXCUSTOMER CONNECTION CLOSEST TO BEARINGSection 6 - Electrical Data Section 6 - Electrical Data Section 7 - Exploded Views and Parts Lists Section 7 - Exploded Views and Parts Lists PART NO. QTYDESCRIPTION PART NO. QTYSection 7 - Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW GeneratorsControl Panel - Drawing No. 0D8503-E Section 7 - Exploded Views and Parts Lists PART NO. QTY. DESCRIPTIONPART NO. QTY. DESCRIPTION Kit Contains Section 7 - Exploded Views and Parts Lists66 2, 5, 19, 20, 39, 40, 47, 64, 93 67 8 69 16A, 16B, 17 70 7, 48, 49, 50, 51, 52, 53, 54Section 7 - Exploded Views and Parts Lists DESCRIPTIONDESCRIPTION BARBED ELBOW 90 3/8NPT X 3/8 L0CKTITESection 7 - Exploded Views and Parts Lists Section 7 - Exploded Views and Parts Lists DESCRIPTIONDESCRIPTION PLATE, BACKING GT990 WITH OIL COOLSection 7 - Exploded Views and Parts Lists Section 7 - Exploded Views and Parts Lists DESCRIPTION1.8 FT 1.25 FTSection 7 - Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators12 kW and 15 kW Generator - Drawing No. 0D3417-B Section 7 - Exploded Views and Parts Lists DESCRIPTION2.6 FT 2.83 FTSection 7 - Exploded Views and Parts Lists Section 7 - Exploded Views and Parts Lists ASSEMBLY, ROCKER COVER BREATHERDESCRIPTION DESCRIPTIONSection 7 - Exploded Views and Parts Lists Guardian Air-cooled 7 kW, 12 kW and 15 kW GeneratorsGN410 Engine - Drawing No. 0D3539-B Part Section 7 - Exploded Views and Parts Lists DESCRIPTIONSection 7 - Exploded Views and Parts Lists FOR GT 760 ENGINE ONLYSection 7 - Exploded Views and Parts Lists DESCRIPTIONALL DIMENSIONS IN MILLIMETERS INCHES Section 8 - MountingGuardian Air-cooled 7 kW, 12 Drawing No. 0D3739-B and 15 kW GeneratorsSection 9 - Notes Guardian Air-cooled 7 kW, 12 kW and 15 kW GeneratorsYOUR WARRANTY RIGHTS AND OBLIGATIONS MANUFACTURER’S EMISSION CONTROL SYSTEM WARRANTY COVERAGEPURCHASER’S/OWNER’S WARRANTY RESPONSIBILITIES CALIFORNIA AND FEDERAL EMISSION CONTROL WARRANTY STATEMENTEMISSION CONTROL SYSTEM WARRANTY Section 10 - WarrantyEMISSION RELATED PARTS INCLUDE THE FOLLOWING WARRANTY SCHEDULE GENERAC POWER SYSTEMS STANDARD TWO YEAR LIMITED WARRANTY FORSection 10 - Warranty GUARDIAN “EMERGENCY AUTOMATIC STANDBY GENERATORS”