1. Introduction
This manual provides essential information for the safe and effective operation, installation, and maintenance of your Cummins Onan 5.5HGJAB-6755 RV Generator. Please read this manual thoroughly before attempting to install or operate the generator. Proper understanding of these instructions will ensure optimal performance and longevity of your unit.
Key features of this product include:
- RV generators & components of good quality
- Easy and flexible to use
- Manufactured in United States
Figure 1.1: Front view of the Cummins Onan 5.5HGJAB-6755 RV Generator, showcasing its compact design and signature green casing.
2. Safety Information
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Always observe the following safety precautions to prevent injury or damage to the generator:
- Read and understand all instructions before operating the generator.
- Ensure adequate ventilation when operating the generator to prevent carbon monoxide poisoning. Never operate indoors.
- Keep children and pets away from the generator during operation.
- Do not refuel the generator while it is running or hot. Allow it to cool down before adding fuel.
- Always use the correct type of fuel as specified in the specifications section.
- Wear appropriate personal protective equipment (PPE) when performing maintenance.
- Ensure all electrical connections are secure and properly insulated.
3. Setup
3.1 Unpacking and Inspection
Carefully remove the generator from its packaging. Inspect the unit for any signs of shipping damage. If damage is found, contact your dealer immediately.
What's in the Box:
- Cummins Onan 5.5HGJAB-6755 RV Generator
- Automotive Replacement Parts (as included components)
- User Manual (this document)
3.2 Installation
The Cummins Onan 5.5HGJAB-6755 is designed for fixed mounting in an RV. Professional installation is highly recommended due to the complexity of fuel, exhaust, and electrical connections.
- Mounting Location: Select a well-ventilated, secure location in your RV that can support the generator's weight and dimensions (approximately 39 x 25 x 23 inches, 16 ounces / 1 pound).
- Fuel Connection: Connect the generator to the RV's gasoline fuel system according to manufacturer guidelines. Ensure all fuel lines are secure and leak-free.
- Exhaust System: Install the exhaust system to safely vent fumes away from the RV and its occupants. Ensure no exhaust gases can enter the living space.
- Electrical Connections: Connect the generator to the RV's electrical system. This typically involves connecting to the RV's transfer switch or main electrical panel. Ensure proper grounding.
- Battery Connection: Connect the generator's electric start system to a suitable 12V DC battery.
Figure 3.1: Side view of the Cummins Onan RV Generator, illustrating potential mounting points and connection areas.
4. Operating Instructions
4.1 Pre-Operation Checklist
Before starting the generator, perform the following checks:
- Check fuel level.
- Check engine oil level.
- Ensure generator is in a well-ventilated area.
- Verify all electrical loads are disconnected or turned off before starting.
4.2 Starting the Generator (Electric Start)
- Ensure the generator's main circuit breaker is in the OFF position.
- Locate the start/stop switch (often remote inside the RV).
- Press and hold the START button until the engine cranks and starts. Release the button once the engine is running.
- Allow the generator to warm up for a few minutes before applying load.
- Once warmed up, switch the main circuit breaker to the ON position.
- You can now connect your electrical loads.
4.3 Stopping the Generator
- Disconnect all major electrical loads from the generator.
- Switch the generator's main circuit breaker to the OFF position.
- Press and hold the STOP button on the start/stop switch until the engine shuts down completely.
5. Maintenance
Regular maintenance is crucial for the longevity and reliable operation of your Cummins Onan generator. Refer to the maintenance schedule in your full service manual for detailed intervals.
5.1 Routine Checks
- Before Each Use: Check oil level, fuel level, and inspect for any visible leaks or damage.
- Every 50 Hours or Annually (whichever comes first): Change engine oil and oil filter. Inspect air filter.
- Every 100 Hours or Annually: Replace air filter, spark plug, and fuel filter. Inspect fuel lines.
Figure 5.1: An internal view of the generator, highlighting components accessible for routine maintenance such as the oil fill cap and air filter housing.
5.2 Cleaning and Storage
- Keep the generator clean and free of debris. Use a damp cloth to wipe down exterior surfaces.
- If storing for an extended period, drain the fuel tank or add a fuel stabilizer. Run the engine until it stops from lack of fuel to clear the carburetor.
- Store in a dry, well-ventilated area.
6. Troubleshooting
This section provides solutions to common issues you might encounter with your generator. For more complex problems, consult a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Generator will not start | No fuel Low oil level Dead battery Spark plug issue | Add fuel Add oil to correct level Charge or replace battery Inspect/replace spark plug |
| Generator starts but shuts down quickly | Overload Low oil pressure Clogged fuel filter | Reduce electrical load Check oil level/pressure sensor Replace fuel filter |
| No power output | Circuit breaker tripped Faulty wiring Generator fault | Reset circuit breaker Inspect wiring (professional) Contact service technician |
7. Specifications
Detailed technical specifications for the Cummins Onan 5.5HGJAB-6755 RV Generator:
| Specification | Value |
|---|---|
| Brand | Cummins |
| Model Number | 5.5HGJAB-6755 |
| Wattage | 5500 watts (Running Wattage: 5.5E+3 Watts) |
| Output Wattage | 5500 Watts |
| Voltage | 120 Volts |
| Frequency | 60 Hz |
| Fuel Type | Gasoline |
| Power Source | Gas-powered |
| Recommended Uses | Commercial |
| Item Weight | 16 ounces (Product Weight: 1 pounds) |
| Product Dimensions | 39 x 25 x 23 inches |
| Engine Type | 4 Stroke |
| Engine Displacement | 418 Cubic Centimeters |
| Ignition System Type | Electric start |
| Included Components | Automotive Replacement Parts |
| Manufacturer | Cummins/Onan |
| UPC | 690781003200 |
Figure 7.1: The generator unit, illustrating its robust construction suitable for RV applications.
8. Warranty and Support
This product is manufactured by Cummins/Onan. For specific warranty details and terms, please refer to the warranty card included with your purchase or visit the official Cummins website. Warranty coverage typically includes defects in materials and workmanship for a specified period from the date of purchase.
For technical support, service, or to inquire about replacement parts, please contact Cummins customer service or an authorized Cummins/Onan service center. You can find contact information on the Cummins official website or through your product dealer.
Online Resources:
- Cummins Official Website: www.cummins.com
- Amazon Store Page: Cummins Store on Amazon
