1. Introduction
This manual provides essential instructions for the proper installation, operation, and maintenance of the Wacker Neuson RT820 Voltage Regulator (Part Number 0111899). This component is designed for use with Wacker Neuson RT560 Trench Rollers. Adherence to these instructions is crucial for ensuring optimal performance, safety, and longevity of the voltage regulator and associated equipment.
2. Safety Information
Always observe general safety precautions when working with electrical components and heavy machinery.
- Disconnect power before installation or maintenance.
- Ensure proper grounding.
- Consult a qualified technician if unsure about any procedure.
- Wear appropriate personal protective equipment (PPE).
3. Product Overview
The Wacker Neuson RT820 Voltage Regulator is a critical electrical component responsible for maintaining a stable output voltage in the RT560 Trench Roller's electrical system. It converts alternating current (AC) generated by the alternator into direct current (DC) and regulates the voltage to protect electrical components and ensure proper battery charging.

Image: The Wacker Neuson RT820 Voltage Regulator, shown here in its protective clear plastic packaging. The regulator unit is a metallic, rectangular component with a black heat sink on top, connected to a multi-colored wiring harness terminating in a gray connector.
4. Installation
- Preparation: Ensure the RT560 Trench Roller is turned off and the battery is disconnected.
- Locate Old Regulator: Identify the existing voltage regulator on the RT560 Trench Roller. Refer to the trench roller's service manual for exact location.
- Disconnect Wiring: Carefully disconnect the wiring harness from the old regulator. Note the orientation and connection points if not clearly marked.
- Remove Old Regulator: Unbolt and remove the old voltage regulator from its mounting bracket.
- Mount New Regulator: Position the new Wacker Neuson RT820 Voltage Regulator (Part Number 0111899) onto the mounting bracket. Secure it with appropriate fasteners, ensuring a firm and stable attachment.
- Connect Wiring: Connect the wiring harness to the new regulator. Ensure all connections are secure and correctly matched according to the trench roller's wiring diagram.
- Reconnect Battery: Reconnect the battery terminals, ensuring correct polarity.
- Initial Check: Before starting the engine, perform a visual inspection of all connections.
5. Operation
Once installed, the voltage regulator operates automatically as part of the trench roller's electrical system.
- Engine Start: Start the RT560 Trench Roller engine as per its operational manual.
- Voltage Monitoring: The regulator will automatically manage the charging voltage to the battery and the electrical system. Monitor the battery voltage gauge on the trench roller's dashboard to ensure it is within the normal operating range (typically 13.5V to 14.5V when the engine is running).
- Normal Function: A properly functioning regulator ensures consistent power supply to all electrical components and prevents overcharging or undercharging of the battery.
6. Maintenance
The Wacker Neuson RT820 Voltage Regulator is designed for durability and typically requires minimal maintenance.
- Regular Inspection: Periodically inspect the regulator and its wiring for signs of corrosion, loose connections, or physical damage.
- Cleaning: Keep the regulator free from dirt, dust, and debris. Use a clean, dry cloth to wipe the exterior. Do not use solvents or abrasive cleaners.
- Heat Dissipation: Ensure the area around the regulator is clear to allow for proper heat dissipation. Blocked airflow can lead to overheating and premature failure.
7. Troubleshooting
If you experience electrical issues with your RT560 Trench Roller after installing or during operation of the voltage regulator, consider the following:
| Symptom | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Faulty regulator, loose connections, faulty alternator | Check wiring, test regulator, test alternator. |
| Battery overcharging (high voltage) | Faulty regulator | Replace regulator. |
| Intermittent electrical issues | Loose connections, corroded terminals | Inspect and clean all electrical connections. |
| No power to electrical components | Blown fuse, faulty wiring, complete regulator failure | Check fuses, inspect wiring, test regulator. |
If troubleshooting steps do not resolve the issue, consult a qualified Wacker Neuson service technician.
8. Specifications
- Part Number: 0111899
- Model Compatibility: Wacker Neuson RT560 Trench Rollers
- Function: Voltage Regulation, AC to DC Conversion
- Weight: Approximately 0.01 ounces
- Manufacturer: Wacker Neuson
9. Warranty Information
For specific warranty details regarding the Wacker Neuson RT820 Voltage Regulator (Part Number 0111899), please refer to the official warranty documentation provided with your Wacker Neuson equipment or contact Wacker Neuson customer support directly. Warranty terms typically cover manufacturing defects for a specified period from the date of purchase.
10. Support and Contact
For technical assistance, replacement parts, or further information, please contact Wacker Neuson customer support or visit their official website.
Wacker Neuson Official Website: www.wackerneuson.com
Customer Service: Consult your regional Wacker Neuson dealer for local support contact information.





