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Generac Power Systems Manuals
Portable Generator
QS-4.0G
User manual
Generac Power Systems QS-4.0G User Manual
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Notice
Generator Fundamentals
Why Generators Produce Electricity
How the Rotor Gets Regulated Direct Current
How the Generator Operates
Introduction to Troubleshooting
Troubleshooting Tools and Equipment
Rotor Rotational Speed
Relationship of Voltage and Frequency
Generator A-C Connection System
The Generator Thermal Protector
Effects of Engine Power
Effects of Dirt and Moisture on Marine Generators
Troubleshooting Chart
Troubleshooting Flow Chart
Insulation Resistance Tests
Testing Stator Insulation
Testing Rotor Insulation
Test between Isolated Windings
Test between Parallel Windings
Drying the Generator
Cleaning the Generator
Test Rotor Insulation
Diagnostic Tests
Check No-Load A-C Voltage and Frequency
Check Load Voltage and Frequency
Check/Adjust Engine Governor
Check Field Boost Circuit
Check Stator Excitation Windings
Check Stator Power Windings
Check Field Circuit
Check Voltage Regulator
Check Voltage Regulator Sensing
Adjustments
Engine Governor Adjustment
Voltage Regulator Adjustment
Engine Carburetor Adjustment
Wiring Diagram
Control Panel & Connection Box Removal
Removal of Connection Panel
Removal of Control Panel Assembly
Control Panel and Connection Box Assembly
Generator Disassembly
Removal of Rear Bearing Carrier Plate
Removal of Brush Holders
Removal of Rear Bearing Carrier
Removal of Stator Assembly
Removal of Blower Housing
Removal of Rotor Assembly
Removal of Engine Plate
Exploded View of Generator Assembly
Components Inspection and Testing
Rear Bearing Carrier Plate and Gasket
Rear Bearing Carrier
Stator Assembly
Blower Housing
Rotor Assembly
Fan & Ring Gear Assembly
Coupling Plate
Brush Holder and Brushes
Generator Reassembly
Install Engine Plate, Fan & Ring Gear and Coupling Plate
Install Blower Housing
Install Stator Assembly
Install Rear Bearing Carrier
Install Brushes and Brush Holders
Install Rear Bearing Carrier Plate
Operational Tests and Adjustments
Preparation before Use
Starting the Engine
Operational Tests
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Quick Links
1
Generator Fundamentals
2
Introduction to Troubleshooting
3
Troubleshooting Chart
4
Wiring Diagram
5
Exploded View of Generator Assembly
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Table of Contents
Troubleshooting
Introduction to troubleshooting
7
Effects of Engine Power
9
Troubleshooting flow chart
10
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This manual is also suitable for:
Qs-6.5g
Qs-8.0g
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