Our Services

Reliable, Expert Support for Legacy Hydro Governor Systems

At Heritage Hydro Governor Service, Inc. (HHGS), we specialize in the service, repair, and restoration of legacy hydroelectric governing equipment. Our team has over 30 years of experience—most of it hands-on with Woodward Governor Company systems—and we’re known across the U.S. for precise work, fast turnarounds, and expert technical support.

Whether it’s a scheduled overhaul or an emergency breakdown, we bring the tools, the knowledge, and the dedication to keep your hydropower equipment performing at its best.

Field Services – On-Site Expertise When You Need It Most

Our on-site field service technicians are available nationwide to inspect, troubleshoot, maintain, and restore governor systems and auxiliaries.

Field services include:

Mechanical governor inspection and performance evaluation
System troubleshooting and diagnostics
Calibration, tuning, and performance adjustments
Minor and major repairs using OEM and equivalent components
Emergency response and outage mitigation
Start-up and commissioning support
Staff training at your facility

We are fully mobile, safety-certified, and capable of working in high-security or remote hydro locations.

In-House Repair & Overhaul Services

For more complex rebuilds and component restoration, HHGS operates a fully equipped shop specializing in legacy mechanical equipment. Our technicians are trained to restore components to OEM specifications or better.

Shop services include

Overhaul of Woodward XX Herringbone Gear Pumps and 20 Series Rotary Gear Pumps
Repair and rewinding of motors
Rebuild of Permanent Magnet Generators and Speed Switches
Testing of PMGs and Pumps
Restoration of hydraulic auxiliaries
Custom machining and re-manufacturing as needed

Preventive Maintenance & Service Agreements

Routine service is key to maximizing system longevity and avoiding costly downtime. HHGS offers customizable preventive maintenance plans and ongoing service contracts for utilities, co-ops, and municipalities.

Benefits:

Scheduled inspections and overhauls
Emergency response prioritization
Historical tracking of equipment condition
Access to OEM-equivalent parts inventory
Dedicated technical support

We tailor every agreement to your site’s size, equipment type, and operational needs.

Emergency & Crisis Response

Downtime isn’t an option when your plant is under pressure. HHGS offers rapid deployment of technicians and parts for urgent repairs and failure response.

We are equipped to:

Respond quickly to outages or critical equipment failures
Perform on-site diagnostics and restoration
Coordinate fast repairs if replacement components are needed
Minimize operational disruptions with real-time communication

Training & Technical Support

We don’t just fix equipment—we help your team understand it. HHGS offers on-site training for operators, maintenance teams, and new hires working with Woodward mechanical governors.

Support services include: