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WOODWARD SMM40 24VDC SPEED ADJUSTING MOTOR
WOODWARD
New product
Modern marine diesel engines and generator sets require precise speed regulation to maintain stable operation, proper frequency control, and efficient load sharing. One of the most trusted components used in these systems is the WOODWARD SMM40 24VDC Speed Adjusting Motor (Part No. 1766-523).
The product shown in the uploaded photographs is a genuine Samurai Denki manufactured SMM40 motor supplied for Woodward governor systems. The labels visible on the packaging identify Part Number 1766-523, while the motor nameplate confirms its application as a 24VDC Speed Adjusting Motor designed for Woodward governor assemblies.
This motor is responsible for converting electrical control signals into accurate mechanical movement, allowing the governor to adjust engine speed smoothly and maintain the required RPM under varying load conditions. Whether installed on auxiliary diesel generators, emergency generators, or industrial propulsion systems, the SMM40 plays an essential role in ensuring reliable engine performance.
For ship operators, maintaining a healthy governor adjustment motor means:
SM MARINE SERVICE™ supplies New, Used, and Reconditioned WOODWARD SMM40 Speed Adjusting Motors depending on customer requirements and budget, with worldwide shipping and technical support.
The WOODWARD SMM40 is a compact, high-precision reversible DC gear motor specifically developed for governor speed adjustment. Rather than acting as a simple electric motor, it provides slow, controlled rotary movement that adjusts the governor speed-setting mechanism with exceptional accuracy.
The SMM40 is widely installed on marine auxiliary engines, diesel generator sets, offshore power units, and industrial engines equipped with Woodward mechanical or electro-hydraulic governors.
Its operating principle is straightforward yet highly reliable. When the governor controller sends a 24VDC command, the internal gear reduction system rotates the governor adjustment shaft in either the clockwise or counterclockwise direction. This movement changes the fuel rack or governor reference position, allowing the engine speed to increase or decrease gradually without sudden fluctuations.
Because of this controlled movement, the SMM40 contributes directly to:
The robust Japanese construction by Samurai Denki ensures dependable performance in harsh marine environments, where vibration, humidity, and continuous operation demand durable and high-quality components.
The WOODWARD SMM40 24VDC Speed Adjusting Motor is engineered to deliver highly accurate and reliable engine speed adjustment in demanding marine environments. Designed for continuous operation, it combines precision mechanical gearing with dependable electrical performance to ensure smooth governor control on diesel engines and generator sets.
Unlike conventional DC motors, the SMM40 is specifically built for governor applications where gradual, controlled movement is essential for maintaining stable engine RPM and generator frequency.
The SMM40 incorporates a precision reduction gearbox that converts the motor's rotation into slow, controlled movement. This allows the governor to make fine speed corrections without overshooting, ensuring smooth engine response during changing load conditions.
Manufactured by Samurai Denki for Woodward applications, the motor features a rugged metal housing that withstands vibration, temperature changes, and continuous engine room operation. Its durable construction makes it suitable for long-term service aboard commercial vessels.
The motor operates on a 24VDC power supply and supports reversible rotation. Depending on the control signal polarity, it can increase or decrease engine speed, making it ideal for automatic governor control systems.
The internal gear train delivers high torque at low speed, allowing the governor adjustment shaft to move smoothly and accurately. This design minimizes wear on governor components while improving overall control stability.
Despite its robust performance, the SMM40 has a compact footprint that allows installation on various Woodward governor models without requiring significant modifications to existing engine control systems.
With proper installation and periodic inspection, the SMM40 requires minimal maintenance. Routine checks of electrical connections, mounting hardware, and operational performance are generally sufficient to ensure long service life.
One of the motor's primary advantages is its contribution to maintaining constant generator frequency. By enabling precise governor adjustments, the SMM40 helps prevent frequency fluctuations that could affect sensitive onboard electrical equipment.
When multiple generators operate in parallel, accurate speed control is essential for balanced load sharing. The SMM40 assists the governor in maintaining synchronization and equal load distribution between generator sets.
| Specification | Details |
|---|---|
| Product Name | Speed Adjusting Motor |
| Manufacturer | Woodward / Samurai Denki Co., Ltd. |
| Model | SMM40 |
| Part Number | 1766-523 |
| Operating Voltage | 24 VDC |
| Motor Type | Reversible DC Gear Motor |
| Function | Governor Speed Adjustment |
| Rotation | Clockwise / Counter-Clockwise |
| Installation | Woodward Governor Assembly |
| Typical Application | Marine Diesel Engine Governors |
| Environment | Marine Engine Room |
| Country of Manufacture | Japan |
The SMM40 Speed Adjusting Motor is commonly responsible for:
The WOODWARD SMM40 Speed Adjusting Motor is used across a wide range of marine propulsion and power generation systems. Its reliability and precision make it a preferred choice for commercial vessels, offshore installations, and industrial power applications.
Container vessels rely on multiple auxiliary generators to supply electrical power for navigation systems, cargo handling equipment, reefer containers, and accommodation services. The SMM40 ensures stable governor control and generator frequency during varying electrical loads.
Bulk carriers often experience significant changes in power demand during cargo operations. The governor motor enables smooth engine speed regulation, supporting efficient generator performance throughout loading and unloading operations.
Safety and uninterrupted electrical power are critical aboard tanker vessels. The SMM40 contributes to stable generator operation, supporting cargo pumps, engine room automation, ballast systems, and safety equipment.
Gas carriers require highly dependable power generation for cargo containment, monitoring, and control systems. Accurate governor adjustment provided by the SMM40 helps maintain reliable engine performance under demanding operational conditions.
Offshore support vessels, drilling units, FPSOs, and platform supply vessels depend on continuous electrical power for dynamic positioning systems, cranes, winches, and mission-critical equipment. The SMM40 plays a vital role in maintaining generator stability.
Cruise ships and ferries require consistent electrical power for propulsion support, hotel services, navigation equipment, and passenger comfort systems. The governor motor helps maintain stable frequency and efficient load sharing between generators.
Research ships and commercial fishing vessels operate a variety of specialized equipment that requires stable electrical power. Accurate governor speed control minimizes voltage and frequency variations, protecting sensitive onboard instruments.
The WOODWARD SMM40 24VDC Speed Adjusting Motor (Part No. 1766-523) is designed to operate with a wide range of Woodward governor systems used in marine propulsion and power generation. It provides accurate electrical-to-mechanical speed adjustment, enabling automatic governor control under varying engine loads.
Although always verify compatibility using the governor model and part number, the SMM40 is commonly associated with the following systems:
The SMM40 is frequently installed on Woodward UG governor assemblies used for medium-speed and high-speed marine diesel engines. It enables remote speed adjustment without manual intervention and improves overall governor responsiveness.
Many auxiliary engines equipped with the Woodward 2301 electronic controller utilize an external speed adjusting motor such as the SMM40. Together, they provide accurate frequency regulation, load sharing, and automatic synchronization.
Modern ships often operate multiple diesel generators in parallel. The SMM40 assists governor systems in maintaining synchronized engine speed, ensuring equal load distribution and stable electrical power generation.
The motor works alongside marine automation equipment including:
Because of its dependable operation, the SMM40 supports stable communication between the governor and higher-level engine automation systems.
Governor systems are critical to the safe operation of marine diesel engines. Even a minor failure in the speed adjustment mechanism can affect generator synchronization, frequency stability, and engine performance. For this reason, maintaining access to genuine replacement parts is essential.
SM MARINE SERVICE™ supports ship owners, ship managers, repair workshops, and marine engineers with a comprehensive range of Woodward governor spare parts.
Our supply capabilities include:
Each supplied unit can be inspected before shipment, and reconditioned units undergo functional testing to verify operational performance.
Our worldwide sourcing network enables us to locate discontinued or hard-to-find governor components for older marine engines, helping vessel operators minimize downtime and reduce maintenance costs.
In addition to supplying spare parts, SM MARINE SERVICE™ provides technical assistance for the diagnosis, repair, testing, and calibration of Woodward governor equipment.
Our engineering support includes:
Experienced technicians inspect the governor motor, gearbox, electrical circuits, and mechanical linkages to identify the root cause of speed control problems.
Every repaired or reconditioned motor can be tested for correct rotational direction, operating voltage, mechanical movement, and overall performance before delivery.
Following installation, governor calibration is essential to ensure proper engine response, stable frequency, and accurate load sharing. Our technical team can provide guidance for calibration procedures.
Typical issues addressed include:
To maximize the service life of the SMM40 Speed Adjusting Motor:
Proper preventive maintenance reduces unexpected failures and helps maintain reliable engine speed control throughout the vessel's operating life.
The WOODWARD SMM40 is a precision reversible DC gear motor designed to adjust the speed setting of Woodward governor systems installed on marine diesel engines and generator sets. It converts electrical control signals into accurate mechanical movement, enabling smooth engine speed regulation.
Part Number 1766-523 is a genuine WOODWARD/Samurai Denki Speed Adjusting Motor designed for selected Woodward governor assemblies operating on a 24VDC power supply.
The standard operating voltage is 24 VDC, making it compatible with most marine automation and governor control systems.
The SMM40 is commonly used on:
Common symptoms include:
Yes. Many SMM40 motors can be repaired depending on the condition of the motor windings, gearbox, bearings, electrical terminals, and mechanical components. A complete inspection should always be performed before deciding on replacement.
Yes. SM MARINE SERVICE™ supplies:
depending on customer requirements, technical specifications, and project budget.
Yes. We provide worldwide shipping to ship owners, ship management companies, offshore contractors, repair workshops, and marine service companies.
Publicly available technical documentation for Woodward governor equipment may include:
For the correct documentation, always verify the governor model and motor part number before downloading or servicing the equipment.
SM MARINE SERVICE™ is a trusted supplier of marine automation, navigation, electrical, and engine control equipment, serving customers worldwide with reliable products and professional technical support.
Our experienced team understands the operational demands of commercial vessels and offshore installations. Whether you require a single replacement governor motor or complete engine control system support, we are committed to delivering quality products, competitive pricing, and responsive customer service.
We support a wide range of marine equipment, including:
We provide comprehensive services including:
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SM MARINE SERVICE™ supplies both New Equipment and Reconditioned Equipment depending on customer requirements and budget.
We provide worldwide supply, sourcing, repair, calibration, technical support, and spare parts services for:
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info@smmarineservice.com
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Nazmul Hasan Bhuiyan
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The WOODWARD SMM40 24VDC Speed Adjusting Motor (Part No. 1766-523) is a vital component in marine diesel engine governor systems, delivering accurate speed adjustment, stable generator frequency, and dependable load sharing performance. Manufactured for demanding marine applications, this precision motor helps ensure reliable engine operation, improved fuel efficiency, and long-term system stability across commercial vessels, offshore platforms, and industrial power generation facilities.
Whether you are performing scheduled maintenance, replacing a failed governor motor, or upgrading your vessel's engine control system, selecting the correct WOODWARD SMM40 Speed Adjusting Motor is essential for maintaining safe and efficient operations.
SM MARINE SERVICE™ is your reliable global partner for WOODWARD governor motors, marine automation equipment, engine control components, and genuine spare parts. We supply new, used, and professionally reconditioned equipment, backed by technical expertise, worldwide logistics, repair services, calibration, and after-sales support.
If you are searching for the WOODWARD SMM40 24VDC Speed Adjusting Motor Part No. 1766-523, require technical assistance, or need support with marine governor systems, contact SM MARINE SERVICE™ today. Our experienced team is ready to assist ship owners, ship managers, marine engineers, offshore operators, and repair facilities with high-quality products, competitive pricing, and dependable technical solutions for marine automation and engine control systems worldwide.
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