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With over 50 years of experience and service teams across Colorado, Florida, and Texas, we help organizations stay powered and prepared year-round.
Customized Generator Maintenance Plans for Industrial and Commercial Systems
Your generator is only reliable if it’s maintained regularly. Preventative maintenance is essential to ensure your system performs when you need it most. At Generator Source, we offer structured generator preventative maintenance service plans tailored to your operation schedule, system size, and compliance requirements. Whether your generator runs weekly or only during emergencies, our certified technicians provide consistent, thorough service to extend equipment life and prevent costly failures.
What Is Generator Preventative Maintenance?
Preventative maintenance is a scheduled service program designed to keep your generator running at optimal performance. Rather than waiting for problems to arise, this approach identifies potential issues before they lead to system failure.
Preventative Maintenance Packages
PM1 – Minor Service
This is a 30-point inspection that includes a complete operational check of your generator system. Coolant and oil samples are taken and sent for lab analysis to identify signs of wear or contamination. This service remains the same whether performed monthly, quarterly, or semi-annually.
PM2 – Major Service
This is a full annual service that includes all items from the Minor (PM1) inspection, plus an oil and filter change. We also pair this visit with a load bank test to verify that the generator can carry its rated load without issue. The PM2 service ensures your generator is both mechanically and electrically ready for operation.
Generator Preventative Maintenance Services We Offer
30-point visual and operational inspection
Oil and coolant sampling and analysis
Oil and filter changes (during PM2)
Battery testing and charging system checks
Exhaust and air intake evaluation
Fuel system inspection and filter replacement
Load bank testing and documentation
Inspection of belts, hoses, and gaskets
Why Preventative Maintenance Matters
A backup generator is only as dependable as its last service. Without preventative care, your system is vulnerable to mechanical wear, fluid contamination, sensor failure, and electrical degradation, often without visible warning signs. Many failures occur because generators are not tested or inspected until they are already needed. Preventative maintenance ensures your unit is never out of service when it matters most.
- Reliable generator startup during emergencies
- Early detection of engine or alternator problems
- Extended generator lifespan and lower lifetime cost
- Compliance with insurance, NFPA 110, and local regulations
- Peace of mind for facilities that depend on continuous uptime
Generator Preventative Maintenance Checklist
Each preventative maintenance visit includes a structured checklist to ensure every critical component of your generator system is inspected, tested, and documented. Below is a summary of what our technicians evaluate during PM1 and PM2 service appointments.
PM1 – Minor Maintenance Checklist (All Visits)
✓ Perform 30-point visual and operational inspection
✓ Record generator hours and check service logs
✓ Inspect coolant levels, pressure, and condition
✓ Draw coolant and oil samples for lab analysis
✓ Inspect battery condition, terminals, and voltage
✓ Check charger and alternator output
✓ Test and inspect control panel and alarms
✓ Inspect air intake and exhaust system for blockages
✓ Inspect belts, hoses, gaskets, and mounting points
✓ Confirm fuel level, inspect lines, and check for leaks
✓ Run generator and monitor startup and idle behavior
✓ Check oil level, appearance, and pressure readings
✓ Review recent fault codes and diagnostic alerts
PM2 – Major Maintenance Checklist (Annual Service)
✓ Drain and replace engine oil
✓ Replace oil filter(s)
✓ Replace fuel filter(s) as needed
✓ Inspect and clean air filter(s)
✓ Perform full load bank test
✓ Verify voltage and frequency under load
✓ Document load bank test results and generator response
✓ Reset service intervals and confirm sensor calibrations
Brands We Service
We provide preventative maintenance for all major generator brands, including:
Industries We Support
Healthcare and Life Safety
We help hospitals, clinics, and care facilities meet NFPA 110 standards through scheduled inspections, load testing, and full documentation of every service visit.
Manufacturing and Production
Preventative maintenance reduces unplanned shutdowns and protects critical equipment during outages. We help factories maintain uptime with routine generator care.
Utilities and Public Works
Generators at water treatment plants, lift stations, and municipal facilities must perform without fail. Our maintenance programs support power reliability across public infrastructure.
Telecommunications and Data Centers
From telecom towers to server rooms, our PM services support continuous uptime and protect data from power-related disruptions.
Commercial Property Management
We maintain generators for office buildings, apartments, and shopping centers, ensuring HVAC, elevators, and security systems are protected during grid failures.
Agriculture and Food Storage
Farm and processing facilities depend on generators to power irrigation, storage refrigeration, and operations during peak seasons. We keep their systems tuned and ready.
In-Shop and Field Generator Maintenance
Our team performs preventative maintenance both in our service centers and on location. Each visit includes detailed inspection reports, fluid analysis results, and service recommendations. Generator Source operates fully equipped facilities in:
24/7 Service Available
Generator Source Locations
With 24/7 service, nationwide shipping, and state-of-the-art facilities across Colorado, Florida, and Texas, Generator Source is your trusted partner for power solutions wherever you are.
Why Choose Generator Source?
- 50 years of industry expertise in commercial generators
- PM1 and PM2 plans designed for all use levels
- Certified technicians and detailed inspection documentation
- Load bank testing included in annual service
- Fast, local service with national reliability
Still have questions or looking for more information?
Generator Source specializes in low-hour, used, new, and surplus generator sets. We have a wide variety of generator sizes and models to fit any project. We are not a broker, we own what we sell.
Call us today (877-866-6895) or click Contact Us to be connected with one of our experienced sales reps.
We have 350+ generators in stock and ready to ship!
