The Woodward SG Governor is a hydraulic speed-droop governor for small diesel, gas, and gasoline engines where isochronous control is not required. The speed-droop design achieves stability and enables load division between paralleled units. Available with 10.8 or 21.7 inch-pounds (1.2 or 2.5 J) of work capacity over 36 degrees of terminal shaft travel.
Key Features
Governor
- Hydraulic speed-droop governor
- Work capacities: 10.8 or 21.7 in-lb (1.2 or 2.5 J)
- 36° terminal shaft (output) travel
- Speed-droop design for stability and parallel load division
- Typically operates at 2,400 or 3,600 rpm at rated engine speed
- Controls down to approximately 25% of normal speed
- Uses engine oil or oil from separate sump (no independent sump)
Options
- Vertical return-spring cover (with or without spring)
- Pittman PM speed-setting motor option
- Guide plug for low-speed stop screw (non-motor versions)
- External return spring option for 10.8 in-lb models
- Special configurations for non-standard speed requirements
Applications
- Small diesel, gas, and gasoline engines
- Speed-droop applications where isochronous control is not required
- Parallel engine operation with load division
- Pump, compressor, and generator drive
Drake Controls Services
Drake Controls is a Woodward Authorized Distributor. The Woodward SG Governor is obsolete — last-time-buy ended April 2023 and Woodward’s published repair window has also closed — so new factory production is no longer orderable. Drake can check remaining unused inventory, and overhaul of existing units may still be possible: submit a repair request or email service@drakecontrols.com. For replacements, a governor application engineer can identify the correct PSG Governor configuration for your engine. See the SG Governor lifecycle and replacement record in the Obsolescence Finder.