WOODWARD 8561-628 PSG NEW GOVERNOR-motor-5484-803 -24VDC -4 RPM

The Woodward 8561-628 PSG governor represents a pressure-compensated simple governor (PSG) designed for precise speed control in marine diesel engines and auxiliary systems. This unit, fitted with motor 5484-803 operating at 24VDC and 4 RPM, offers important speed regulation for marine propulsion and power generation applications.

Technical Specifications for Woodward 8561-628 PSG governor

Governor Configuration:

• Model: Woodward 8561-628 PSG (Pressure-compensated Simple Governor)

• Motor: 5484-803, 24VDC, 4 RPM

• Serial Number: 20105148

• Output: Enhanced work capacity compared to standard SG governors (source)

• Operating Mode: Isochronous or droop control capability.

  
  

Key Performance Characteristics: The PSG governor includes Woodward's compensation system, which has a buffer piston, needle valve, and compensating land on the pilot valve. This design allows for stable isochronous operation and lets it run in traditional droop mode for parallel generation applications.

Marine Engine Applications

Marine vessels require sophisticated speed control systems to maintain engine performance under varying load conditions. The governor responds to load fluctuations caused by rough weather, propeller immersion variations, and operational changes that could otherwise damage engine components. (source)

Primary Applications:

• Marine Diesel Generators: Essential for maintaining frequency stability in ship electrical systems.

• Propulsion Systems: Speed regulation for main engines under varying sea conditions.

• Auxiliary Equipment: Control of pumps, compressors, and other engine-driven machinery.

Control System Integration

Modern marine automation systems rely more and more on integrated control platforms that mix traditional governors with digital monitoring features. The 8561-628 PSG connects with larger engine management systems to offer coordinated control of fuel delivery, emissions compliance, and performance improvement. (source)

Operational Benefits:

• Isochronous Control: Maintains constant speed regardless of load variations.

• Pressure Compensation: Enhanced stability through advanced hydraulic damping.

• Reversible Operation: Adaptable to different engine rotation directions.

Maintenance and Reliability

Research shows that marine diesel engine governors need careful calibration to manage the natural traits of reciprocating engines, such as speed variations and differences between cylinders. The PSG's compensation system tackles these issues with its advanced hydraulic control mechanism.

Calibration Considerations:

The needle valve compensation system needs precise adjustment for the best performance. For isochronous operation, open the needle valve 3-4 turns from fully closed, then gradually close it until hunting stops while keeping control responsive.

Installation Requirements

Physical Specifications:

• Mounting: Standard base configuration with horizontal orientation.

• Oil Supply: Minimum 25 psi engine oil pressure (source).

• Electrical: 24VDC motor supply with 4 RPM output.

• Linkage: Direct connection to fuel rack or actuator systems.

Environmental Considerations: 

Marine environments present unique challenges, including temperature variations, vibration, and humidity. The cast iron construction and sealed hydraulic system provide durability under these tough conditions.

Performance in Marine Service

Field experience shows that properly configured PSG governors greatly improve engine reliability and fuel efficiency in marine applications. The system can maintain precise speed control in different sea conditions. This reduces mechanical stress and extends engine life.

Operational Advantages:

• Reduced speed variations when load changes

• Improved fuel efficiency from optimized engine operation

• Better system stability in parallel generation setups

• Minimal maintenance needs with proper installation

Marine Masters has this Woodward 8561-628 PSG governor with motor 5484-803 in stock and ready for worldwide delivery. As trusted marine equipment suppliers for over 30 years, we provide tested and certified units along with complete documentation and technical support. Whether you need emergency replacement parts or parts for planned maintenance, our team ensures quick dispatch and dependable delivery to ports around the world.

Contact us today for compatibility verification, technical specifications, or immediate quotation. we respond within hours to keep your vessels operational.