Generator Maintenance, Repairs, and Custom Solutions
Quarterly PM1 inspections, annual PM2 load bank testing, and multi-year PM3 overhauls.
24/7 Emergency Service & Repairs
Rapid response times for critical situations.
Caterpillar, Cummins, Kohler, MTU, Generac, Olympian, John Deere, Detroit, Doosan, etc.
Single and three-phase portable generators with same-day delivery and on-call support.
Bulk diesel delivery, emergency refueling, fuel polishing, and tank cleaning services.
ATS installations, control panel upgrades, frequency conversions, generator painting, system sizing & more…
Preventative Maintenance
We recommend a Preventative Maintenance 1 every quarter. This 31-point inspection examines all critical components to identify potential issues before they become costly problems.
PM1 Inspection Items
| Maintenance Item | PM 1 | PM 2 | PM 3 | Load Bank Test |
| Air Inlet System & Air Filters | ✔ | ✔ | ✔ | |
| Alternator | ✔ | ✔ | ✔ | |
| Barrel Insulation | ✔ | ✔ | ✔ | |
| Batteries | ✔ | ✔ | ✔ | |
| Battery Charger | ✔ | ✔ | ✔ | |
| Bearings | ✔ | ✔ | ✔ | |
| Block Heater | ✔ | ✔ | ✔ | |
| Breakers | ✔ | ✔ | ✔ | |
| Collect Oil & Coolant Samples | ✔ | ✔ | ✔ | |
| Controller | ✔ | ✔ | ✔ | |
| Coolant & Coolant Filters | ✔ | ✔ | ✔ | |
| Crankcase Breather(s) | ✔ | ✔ | ✔ | |
| Engine Oil & Oil Filters | ✔ | ✔ | ✔ | |
| Exhaust Manifold | ✔ | ✔ | ✔ | |
| Fan and Fan Drive | ✔ | ✔ | ✔ | |
| Fuel Filters – Primary / Secondary | ✔ | ✔ | ✔ | |
| Fuel Lines | ✔ | ✔ | ✔ | |
| Fuel Tank | ✔ | ✔ | ✔ | |
| Gauges | ✔ | ✔ | ✔ | |
| Governor | ✔ | ✔ | ✔ | |
| Hoses & Connections | ✔ | ✔ | ✔ | |
| Jacket Water Heater | ✔ | ✔ | ✔ | |
| Radiator | ✔ | ✔ | ✔ | |
| Remote Annunciators & Alarms | ✔ | ✔ | ✔ | |
| Safety Controls | ✔ | ✔ | ✔ | |
| Starter | ✔ | ✔ | ✔ | |
| Turbocharger(s) | ✔ | ✔ | ✔ | |
| Vibration Isolators | ✔ | ✔ | ✔ | |
| Voltage | ✔ | ✔ | ✔ | |
| Water Pump | ✔ | ✔ | ✔ | |
| Water Separator | ✔ | ✔ | ✔ | |
| Additional Service Items | ||||
| Change Oil | ✔ | ✔ | ||
| Change Filters (Oil, Coolant, Fuel, Air) | ✔ | ✔ | ||
| Change Coolant | ✔ | |||
| Change Rubber Hoses & Belts | ✔ | |||
| Change Thermostats & Gaskets | ✔ | |||
| Collect Fuel Samples | Upon Request | Upon Request | Upon Request | |
| Transfer Test | Upon Request | Upon Request | Upon Request | |
| Visual ATS Inspection | Upon Request | Upon Request | Upon Request | |
| Change Batteries | Upon Request | Upon Request | Upon Request | |
| Load Bank Test | ||||
| Accurate Temperature Gauge Test | ✔ | |||
| Auto Start Test & Tag Verifications | ✔ | |||
| Check Temperature with Heat Gun | ✔ | |||
| Coolant Leaks | ✔ | |||
| Engine Alternator Test | ✔ | |||
| Full Rating Tests | ✔ | |||
| Gauge Adjustment Tests | ✔ | |||
| Gauge Compliance Tests | ✔ | |||
| Oil Leaks | ✔ | |||
| Pre-Alarm Verification | ✔ | |||
| Shut Down Verification | ✔ | |||
PM2 Inspection + Load Bank Test
Once a year, your industrial generator needs a Preventative Maintenance 2. This includes everything in our quarterly PM1 inspection, plus an oil change, air filters & coolant filters replacement, and a load bank test.
PM3 Inspection
Every three to six years, we perform our most comprehensive service. This Preventative Maintenance 3 includes all PM2 items plus replacement of coolant, hoses, gaskets, and thermostats.
Request Service
Join our Maintenance Program to lock in pricing and automated scheduling or Contact us now at 877-866-6895 to be connected with one of our experienced sales reps.
Ask about our rental units to bridge the gap during maintenance or repairs.
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.
Additional Generator Services
In addition to preventative maintenance, we offer a full range of specialized and non-PM services to support changing power requirements, site conditions, and equipment upgrades. These services are often project-based and performed as needed.
Automatic Transfer Switch (ATS) Services
- Expert ATS sizing and installation assistance
- Site preparation and planning for seamless integration
- Customized solutions for various backup power scenarios
Control Panel Installations & Upgrades
- Implement advanced monitoring and control systems
- Compatible with major brands: Deep Sea Electronics, Woodward Controllers, Caterpillar EMCP, Cummins Power Command
- Enhance remote monitoring, load sharing, and peak shaving capabilities
Custom Generator Fabrication
- Skilled fabricators for unique power generation projects
- Customized trailers, enclosures, and specialized equipment
- Turn your power generation concept into reality
Generator Battery Services (outside of scheduled PM)
- Comprehensive battery testing and replacements
- Partnerships with leading battery suppliers
- Ensure reliable starts and consistent performance
Generator Frequency Conversions
- Specialized 60 Hz to 50 Hz conversions for international operations
- Engine modifications and third-party frequency converter installations
- Customized solutions for global power requirements
Generator Oil Analysis
- On-site and lab-partnered oil testing
- Rapid results for informed maintenance decisions
- Proactive approach to generator health and longevity
Generator Painting and Aesthetics
- High-quality painting services for generator refurbishment
- Enhance the appearance of your power equipment
- Protect your generator from environmental factors
Industrial Generator System Sizing
- On-site analysis and customized power planning
- Expert consultations for optimal generator sizing
- Engineering services for complex power requirements
Load Bank Testing for Generators (outside of scheduled PM)
- Generator phase conversions
- Tailored solutions to meet changing power distribution needs
- Complimentary testing for all generator sales
- On-site load bank testing services for larger industrial generators
- Ensure optimal performance and reliability under various load conditions
Voltage ChangesControl Panel Installations & Upgrades
- Convert between 480V and 277V configurations
- Hourly rate service available for all customers
- Expert assessment of generator reconfiguration possibilities
Voltage Regulator Replacements
- Diagnostics and replacement for malfunctioning regulators
- Upgrades to meet specific voltage regulation requirements
- Expertise in both self-contained and separate regulator systems
Other Services
- Paralleling configurations for increased power capacity
- Transformer installation and configuration
- On-site troubleshooting for rapid issue resolution
- Customized planned maintenance programs
F.A.Q.
Frequently Asked Questions
How often should I service my industrial generator?
We recommend servicing your generator at least twice a year, typically every 3 months, under normal operating conditions. Critical standby units or generators in harsh environments may require quarterly service. Regular preventive maintenance includes changing the oil and filters, inspecting plugs and belts, testing the battery, and running the generator under load. In addition to these services, it’s wise to exercise the generator (run it with a load) monthly, or weekly for critical systems, to keep the engine and alternator in good shape
Following this schedule will greatly improve reliability and ensure your generator is ready to perform when an outage strikes.
Can you help with emergency generator repairs?
Yes – we offer 24/7 emergency repair services. We know that generator failures don’t always happen 9–5, and downtime can be very costly. Our technicians are on-call around the clock and can be dispatched quickly to your site in an emergency. We’ll troubleshoot the issue, work to get the generator running immediately (even if via a temporary fix), and then provide a full repair solution. Our goal is to minimize your downtime in any way possible. We also keep rental generators available as a stop-gap measure if a repair requires significant time – either way, we’ve got you covered in an emergency.
Do you provide generator rental services during maintenance?
We service all major commercial/industrial generator brands. This includes diesel and natural gas generators from manufacturers such as Caterpillar, Cummins, Generac, Kohler, MTU, Detroit Diesel, Katolight, and many others. Our team’s multi-brand expertise means you don’t need separate service providers for different gensets in your fleet – we can maintain and repair them all. We also handle the associated equipment like transfer switches (ASCO, Thomson, Zenith, etc.) and control systems. Chances are if it produces power, we have experience with it!
Do you provide generator rental services during maintenance?
Absolutely. We maintain a fleet of portable rental generators that can be delivered to your site to supply power during scheduled maintenance or extended repairs
If your primary generator needs to be taken offline for a major service or overhaul, we’ll arrange a temporary generator to keep your facility powered with minimal interruption. Rental units are available in a range of sizes to suit your load. This ensures you have continuous power even when your main generator is out of service. Just let us know you’ll need a backup, and we’ll include a rental setup as part of the maintenance plan.
Can Generator Source handle large-scale industrial generator installations?
Yes – we have extensive experience with large-scale installations and complex power projects. Our team has handled projects up to and beyond 20 MW in capacity, involving multiple large generators in parallel. We provide end-to-end project management for these jobs: engineering design, logistical planning (including heavy equipment transport and cranes), on-site installation, and final commissioning. We also have the technical expertise to implement advanced controls for synchronizing multiple generators, and we’ve worked on systems for hospitals, data centers, manufacturing plants, and utility peaking sites. If you have a big power project, we have the know-how and resources to execute it successfully from start to finish.
We Sell & Service All Major Brands
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