Generac 005030-0 (15kW), 005031-0 (25kW) Exhaust Manifold Procedure, Intake Manifold Procedure

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Section 4 — Maintenance

Liquid-cooled 15, 20 and 25 kW Generators

7.Turn the voltage regulator’s VOLTAGE ADJUST pot to obtain a line-to-line voltage of:

A.240 VAC if the generator has been configured for

60 Hertz operation.

B.200 VAC if the generator has been configured for

50 Hertz operation.

8.If the RED REGULATOR LED is flashing, adjust the STABILITY pot in either direction until the flashing stops.

9.Apply an electrical load and check the engine speed recovery.

A.Adjust the UNDERFEQUENCY ADJUST pot CCW to reduce load during engine recovery.

B.For flat regulation (no voltage decrease as fre- quency drops) set the UNDERFREQUENCY ADJUST pot fully CW.

C.To obtain a constant voltage regulation as fre- quency decreases, set the UNDERFREQUENCY ADJUST pot fully CCW.

10.With the electrical load still applied, check the REGULATOR LED for flashing. If the LED is flashing, adjust the STABILITY pot until the flash- ing stops.

11.If better response is needed, adjust the GAIN pot clockwise (CW) as needed. Then (if needed) cor- rect for stability by adjusting the STABILITY pot.

12.Turn OFF the electrical loads.

13.Verify that all the voltage regulator’s LED’s are ON.

14.Turn OFF the generator.

D. FIRST 100 OPERATING HOURS

1.Change engine oil and oil filter. After initial change, service engine oil and filter at 150 oper- ating hours or six months, whichever comes first.

2.Retorque cylinder head (see torque specs).

3.Retorque intake and exhaust manifold (see torque specs).

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).

2.Retorque intake and exhaust manifold (see torque specs).

3.Check engine compression.

4.Check valve clearance.

4.2EXHAUST MANIFOLD PROCEDURE

1.If necessary, clean gasket surfaces on exhaust manifold and cylinder head.

2.Install exhaust manifold and exhaust manifold gasket.

3.Install fasteners.

NOTE:

Exhaust manifold fasteners must be tightened in two stages.

4.1MAINTENANCE PERFORMED BY AUTHORIZED SERVICE FACILITIES

A. EVERY THREE MONTHS

1.Check battery condition.

2.Inspect and test fuel system.

3.Check transfer switch.

4.Inspect exhaust system.

5.Check engine ignition system.

6.Check fan belts.

4.Tighten fasteners to 20-30 N-m (15-22 lb-ft) dur- ing the first stage.

5.Retighten fasteners to 60-80 N-m (44-59 lb-ft) during the second stage.

4.3INTAKE MANIFOLD PROCEDURE

1.Clean and inspect the mounting surfaces of the intake manifold and the cylinder head. Both sur- faces must be clean and flat (Figure 4.1).

2.Clean and lightly oil the manifold bolt/stud threads.

B. ONCE EVERY SIX MONTHS

Figure 4.1 — Intake Manifold Installation

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.

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Contents This manual should remain with the unit ‹ Operation and Maintenance Authorized Service Dealer Location‹ HOW to Obtain Service IntroductionTable of Contents General Hazards ‹ Standards Index Electrical HazardsAutomatic Transfer Switch ATS Mode Transfer SwitchEngineered Transfer Switch Wire Start GTS Mode Generator‹ 1.8.2 High Coolant Temperature Switch ‹ 1.8.1 LOW OIL Pressure SwitchMain Circuit Breaker Generator Fuel SystemLifting the Generator UnpackingSpecifications Fuel ConsumptionAWSF-52-C Before Installation Coolant RecommendationsEngine OIL Recommendations Generator Mounting Support Generator Location‹ 2.1.1 Nfpa Standards ‹ 2.1.2 Other Published StandardsTotal Circuit Isolation Method Basic Standby Electric SystemGrounding the Generator Emergency Circuit Isolation MethodGenerator AC Neutral Connections Connection Diagram ATS ModeConnection Diagram GTS Mode ‹ 2.11.1 Vented Batteries Battery InstallationPreparation Before START-UP Manual Transfer START-UP Control Console ComponentsBat Red Oil Red Temp Red Speed Red Crank Red Engine Governor Gain AdjustmentsManual Retransfer Shutdown Automatic OperationWeekly Exercise Cycle Voltage Regulator Adjustment Control Board DIP Switch SettingsIntake Manifold Procedure Exhaust Manifold ProcedureCooling System Cylinder Head ProcedureOverload Protection for Engine DC Electrical System Checking Fluid Levels‹ 4.8.2 Check Battery ‹ 4.7.2 Battery Fluid ‹ 4.8.6 Perform Visual Inspection‹ 4.7.3 Engine Coolant ‹ 4.8.1 Check Engine OIL Level‹ 4.8.11 Changing the Engine AIR Cleaner Miscellaneous Maintenance‹ 4.9.1 Cleaning the Generator ‹ 4.8.13 Coolant Change‹ 4.9.3 Battery Maintenance ‹ 4.9.4 Battery ReplacementPeriodic Replacement Parts Service Maintenance Interval Information Scheduled MaintenanceLevel Maintenance Level Problem Cause Correction Troubleshooting PointsLiquid-cooled 15, 20 and 25 kW Generators Liquid-cooled 15, 20 and 25 kW Generators Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Electrical Data Page Hold Down Battery Support Battery TrayAssembly Battery Tray Battery Post Cover BlackTo B Door Battery Compartment Assy Wire 14AWG 7.5 #0 GRN/YELDuct Intake MID AL 2.5L Duct Discharge RH AL 2.5LPage Switch ROC Dpdt ON-OFF-ON Switch ROC Dpst 125V SPDHang TAG 2 Wire Start not Shown TOP, Control PanelPage Harness Ctrl PNL 2.5L Ford AL not Shown 13 17 Engine 2.5L Ford Tank Coolant RecoverySTARTER, 12 Volt NUT HEX M10-1.5 G8 YEL CHRTo Engine Cover AIR Cleaner Body Carburetor AssemblyGASKET, AIR Cleaner Adapter Bracket Fuel RegulatorLocktight Rotor 390 20KW 1P Direct HSB 2.5L Ford Rotor 390 15KW 1P Direct HSB 2.5L FordRotor 390 25KW 1P Direct HSB 2.5L Ford Rotor 390 40KW 1P Direct HSB 3.9L ChryslerPipe Exhaust 2.5L Ford Pipe Muffler OUTMuffler 2.5L Ford Saddle 2 InchCover Connector Housing Housing Governor ConnectorASM Motor Stepper Harn GOV 2.5L FordBarbed STR 1/4 NPT X 3/8 HOSE, 2.5L Ford LowerALM Radiator 2.5L FordInstallation Diagram Your Warranty Rights and Obligations MANUFACTURER’S Emission Control System Warranty CoveragePURCHASER’S/OWNER’S Warranty Responsibilities Emission Related Parts Include the Following Emission Control System WarrantyThis Warranty Shall not Apply to the Following

005030-0 (15kW), 005031-0 (25kW) specifications

Generac has long been recognized as a leader in backup power solutions, and its 005031-0 (25kW) and 005030-0 (15kW) home standby generators exemplify the brand's commitment to reliability and performance. Designed for residential use, these generators provide peace of mind during outages, ensuring that homes remain powered even in the most challenging conditions.

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