Description
⚙️ Product Overview
The WOODWARD 9907-014 is a low-voltage 2301A electronic speed control designed to regulate the speed of diesel or gas engines and steam or gas turbines. The 2301A platform uses a speed-sensing device and proportional actuator to control the prime mover’s fuel or steam metering system.
Model 9907-014 is the forward-acting, low-voltage version of the standard 2301A speed control. Woodward identifies it as a 10–40 VDC model, with 9907-014 specifically listed as an EU Directive-compliant version.
The supplied listing identifies this unit as 2301A, Part No. 9907-014 Rev.H, used, with insignificant signs of use and no reported functional problems.
🔧 Key Features
- Woodward 2301A electronic speed control
- Part number 9907-014
- Revision H as listed
- Low-voltage DC supply
- Forward-acting control
- Standard single-actuator configuration
- Designed for diesel and gas engines
- Suitable for steam and gas turbine applications
- Isochronous speed control capability
- External droop capability
- Adjustable gain, stability, speed, and ramp functions
- Magnetic pickup speed-sensing input
- Compact single-PCB controller construction
- Suitable for generator and prime-mover control applications
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | WOODWARD |
| Model | 2301A |
| Part Number | 9907-014 |
| Revision | Rev.H, per supplied listing |
| Product Name | Electronic Speed Control |
| Series | Woodward 2301A |
| Control Type | Forward-Acting Speed Control |
| Supply Voltage | 10–40 VDC |
| Application | Diesel/Gas Engine & Turbine Speed Control |
| Actuator Configuration | Standard Single Actuator |
| Speed Sensing | Magnetic Pickup / Speed Sensor |
| Operating Temperature | -40 to +85°C |
| Power Consumption | ≤15 W |
| Dimensions | Approx. 8.625 × 7.25 × 2.5 in |
| Weight | Approx. 2.5 lb / 1.13 kg |
| Condition / Status | Used; tested/working condition should be verified |
🎛️ Speed Control Functions
The 2301A controls prime-mover speed through a closed-loop arrangement consisting of the electronic speed control, external power source, speed-sensing device, and proportional actuator.
The 9907-014 supports isochronous operation for maintaining constant speed and can also use external droop for applications where the prime mover operates on an infinite bus or in parallel with other prime movers.
The control includes front-accessible adjustment potentiometers for commissioning and tuning. Speed-sensor input must provide sufficient signal during cranking and operation; Woodward specifies a minimum 1.0 Vrms speed-sensor signal at cranking speed for the control to operate correctly.
⚡ Typical Applications
The WOODWARD 9907-014 can be used for:
- Diesel generator sets
- Gas engine generator systems
- Marine generator engines
- Industrial engine-driven equipment
- Steam turbines
- Gas turbines
- Prime-mover speed regulation
- Constant-speed generator applications
- Parallel generator systems
- Legacy Woodward 2301 control replacement
The 9907-014 was also developed as a replacement for certain older Woodward/Caterpillar 2301 controls, although terminal wiring differs from the older design and should be checked carefully during retrofit work.
🔌 Control & Wiring Integration
When replacing an older 2301 with a 9907-014, do not assume that the existing wiring can simply be transferred terminal-for-terminal. Woodward’s replacement documentation identifies wiring changes between the older 8272-689 control and the 9907-014, including actuator connections, rated/idle switching, droop potentiometer connections, and optional synchronizer/auxiliary inputs.
The 9907-014 actuator connections are on terminals 9 and 10, while terminals 15 and 16 can support an optional SPM synchronizer input. Auxiliary input connections can also use terminals 15 and 17 depending on the application.
🛠️ Installation & Maintenance
Before installation, confirm the exact 2301A model and application wiring.
- Shut down and secure the prime mover.
- Isolate the control power supply.
- Verify the part number 9907-014 and revision.
- Check the actuator type and wiring.
- Verify the magnetic pickup installation and signal level.
- Inspect all terminal connections.
- Install the control in the original mounting location.
- Restore the specified DC supply.
- Perform initial speed and actuator adjustments according to the applicable Woodward procedure.
- Start the prime mover under controlled conditions and verify stable speed regulation.
During commissioning, special care should be taken to prevent runaway or overspeed. Woodward specifically warns that an emergency shutdown capability should be available when starting the prime mover.
🔍 Troubleshooting Guide
Engine does not respond to the speed control:
Check DC supply voltage, actuator wiring, magnetic pickup signal, and rated/idle input.
Engine speed hunts:
Check the gain and stability adjustments and verify the speed-sensor signal.
Speed is unstable at low RPM:
Inspect the magnetic pickup installation and confirm adequate signal voltage during cranking.
Actuator does not move correctly:
Verify actuator compatibility, polarity, wiring, and the control’s adjustment settings.
Replacement control behaves differently from the original:
Check whether the original unit was a different 2301 configuration and review terminal-by-terminal wiring before commissioning.
❓ Frequently Asked Questions
Q: What is WOODWARD 9907-014?
A: It is a 2301A low-voltage electronic speed control for diesel/gas engines and steam/gas turbines.
Q: What is the operating supply voltage?
A: The 9907-014 is the low-voltage version and is specified by Woodward for 10–40 VDC supply.
Q: Is 9907-014 a load-sharing control?
A: It is primarily a standard speed-control model. The 2301A platform can support isochronous operation and external droop, while specific load-sharing arrangements depend on the complete system configuration.
Q: Is 9907-014 forward or reverse acting?
A: 9907-014 is the forward-acting version. Woodward’s part-number table lists 9907-016 as the corresponding reverse-acting low-voltage model.
Q: Can it replace an older Woodward 2301 control?
A: In certain applications, yes. However, the wiring and terminal assignments may differ, so the applicable Woodward replacement documentation must be followed.
Q: What should be checked before ordering?
A: Verify the complete part number, revision, supply voltage, forward/reverse action, actuator configuration, speed range, wiring, and application requirements.
📦 Recommended WOODWARD Models
- WOODWARD 9907-014 – 2301A Low-Voltage Speed Control
- WOODWARD 9907-016 – 2301A Low-Voltage Reverse-Acting Control
- WOODWARD 9907-015 – 2301A High-Voltage Speed Control
- WOODWARD 9907-017 – 2301A High-Voltage Reverse-Acting Control
- WOODWARD 9907-018 – 2301A Load Sharing & Speed Control
- WOODWARD 9907-019 – 2301A Load Sharing & Speed Control
- WOODWARD 9907-023 – 2301A Speed Control
- WOODWARD 9907-024 – 2301A Speed Control
- WOODWARD 9905-131 – 2301A Low-Voltage Speed Control
- WOODWARD 9905-133 – 2301A Low-Voltage Reverse-Acting Speed Control
📌 Spare-Part Recommendation
For maintenance of an existing Woodward 2301A installation, 9907-014 should be matched by complete part number and control configuration rather than by the 2301A model name alone. Keep the correct actuator type, supply voltage, forward/reverse action, speed-sensing arrangement, and terminal wiring documented before replacement.
The 9907-014 is particularly suitable as a spare for legacy engine and generator speed-control systems where maintaining the original 2301A architecture is preferred.
