Description
The 8256-008 is a high-performance Actuator from the renowned Woodward Electrically Powered Governor (EPG) product line. Specifically engineered for precise fuel control in small-to-mid-sized prime movers, this unit is designed to interface seamlessly with Woodward EPG speed controllers. By converting electrical input signals into mechanical rotary motion, it ensures stable engine speed and load control across varying operational demands.
Product Technical Details
- Model Number: 8256-008
- Operating Voltage: 24 VDC Battery System
- Rotation Direction: Clockwise to Increase Fuel
- Series: EPG (Electrically Powered Governor)
- Weight: Approximately 1.8 kg
- Dimensions: 135 mm (length) x 120 mm (diameter)
- Country of Origin: United States of America
Common Questions & Answers
💡 What is the significance of the “Clockwise to Increase Fuel” designation? This defines the mechanical interface requirement. When installing the actuator, the linkage must be calibrated so that a clockwise rotation increases the fuel rack position. Installing an actuator with the incorrect rotation direction for your specific engine linkage configuration can lead to runaway conditions or a complete failure to govern the engine.
⚙️ Why must the actuator and speed control be matched? The Woodward EPG system relies on a specific impedance and feedback loop frequency. Using an incompatible speed control can cause “hunting” (unstable oscillation of engine RPM) or fail to provide enough torque to overcome the fuel rack spring force. Always ensure your controller’s current output capacity aligns with the 8256-008 specifications.
🛡️ What maintenance does this actuator require? As a ruggedized industrial component, it requires very little maintenance. However, it is critical to ensure that the external linkage connected to the actuator shaft moves freely without binding. Binding linkage causes excessive current draw and can lead to premature failure of the internal coil.
🔧 How should I verify the electrical connection? Always double-check the polarity of the 24V supply. While these units are built to be robust, incorrect wiring can damage the internal windings. Using a multimeter to confirm a stable 24V output from the governor controller is the best practice before finalizing the linkage connection.
Recommended Woodward Series & Models
If you are maintaining Woodward EPG systems or looking for compatible components, these models are frequently cross-referenced or used in parallel with the 8256-008:
- Woodward 8256-007 (EPG Actuator, 12V version)
- Woodward 8290-038 (EPG Speed Control Module)
- Woodward 8290-039 (EPG Speed Control, multi-voltage)
- Woodward 8290-186 (Integrated EPG Controller)
- Woodward 8256-001 (Standard EPG Actuator)
- Woodward 8256-015 (High-Torque EPG Actuator)
- Woodward 8256-022 (EPG Actuator for specialized linkage)
- Woodward 8270-1002 (Woodward 701A Digital Controller)
- Woodward 8272-356 (Magnetic Pickup Sensor for speed sensing)
- Woodward 8290-037 (Basic EPG Speed Control)
