Preventative Maintenance, Advanced Upgrades and Custom Solutions
All Major Brands Serviced
Caterpillar, Cummins, Kohler, MTU, Generac, Olympian, John Deere, Detroit, Doosan, etc.
24/7 Emergency Service
Rapid response times for critical situations.
Comprehensive Diagnostics & Tools
Advanced diagnostic equipment and specialized tools.
Experienced & Certified Technicians
EGSA-certified technicians and over 50 years of experience.
Dedication to Uptime
Minimizing downtime and ensuring continuous operation.
Parts Availability
Quick access to genuine and aftermarket parts.
Preventative Maintenance
No two power systems are the same; applications, loads, and environmental factors vary from site to site. While the guide below outlines our standard recommended preventative maintenance for the first 36 months of operation, we recognize that your facility may have unique demands. We are fully equipped to customize a service plan that specifically aligns with your equipment usage and uptime requirements.
Our typical maintenance plan includes:
PM2 + 4hr Load Bank Test
(PM1 + All Filters & Oil Change)
PM3
(PM2 + Coolant, Hoses, Gaskets & Thermostats Change)
PM / Service Items
| Maintenance Item | Minor Service (PM 1) |
Major Service (PM 2) |
Major Service + (PM 3) |
Load Bank |
| ▶ 31 Point Inspection Items (Click to Show/Hide) |  |
|
|
|
| Air Inlet System & Air Filter | ✔ | ✔ | ✔ | |
| Alternator | ✔ | ✔ | ✔ | |
| Barrel Insulation | ✔ | ✔ | ✔ | |
| Batteries | ✔ | ✔ | ✔ | |
| Battery Charger | ✔ | ✔ | ✔ | |
| Bearing(s) | ✔ | ✔ | ✔ | |
| Belts, Hoses & Connections | ✔ | ✔ | ✔ | |
| Block Heater | ✔ | ✔ | ✔ | |
| Breaker(s) | ✔ | ✔ | ✔ | |
| Collect Oil & Coolant Samples | ✔ | ✔ | ✔ | |
| Coolant & Coolant Filter(s) | ✔ | ✔ | ✔ | |
| Crankcase Breather(s) | ✔ | ✔ | ✔ | |
| Exhaust Manifold | ✔ | ✔ | ✔ | |
| Fan and Fan Drive | ✔ | ✔ | ✔ | |
| Fuel Filters – Prim/Sec | ✔ | ✔ | ✔ | |
| Fuel Lines & Connections | ✔ | ✔ | ✔ | |
| Fuel Tank & Rack | ✔ | ✔ | ✔ | |
| Gauges | ✔ | ✔ | ✔ | |
| Governor and controls | ✔ | ✔ | ✔ | |
| Jacket Water Heater | ✔ | ✔ | ✔ | |
| Oil & Oil Filter(s) | ✔ | ✔ | ✔ | |
| Radiator | ✔ | ✔ | ✔ | |
| Remote Annunciators/Alarms | ✔ | ✔ | ✔ | |
| Safety Controls | ✔ | ✔ | ✔ | |
| Starter | ✔ | ✔ | ✔ | |
| Turbocharger(s) | ✔ | ✔ | ✔ | |
| Valves and Valve Rotators | ✔ | ✔ | ✔ | |
| 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 Tests | ||||
| 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 | ✔ | |||
Recommended 36-Month Maintenance Schedule
| Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | Q1 | Q2 | Q3 | Q4 | |
| PM1 | |
|
|
|
|
|
|
|
||||
| PM2 | |
|
|
|||||||||
| PM3 | |
|||||||||||
| Load Bank | |
|
|
Schedule Your Service Today
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
What They’re Saying
Generator Service Calls
VIDEOS
ARTICLES
Case Study: Protecting Uptime for a Regional Data Center Through Rapid Cooling System Diagnostics
Industry: Data Center / IT InfrastructureLocation: Denver Metropolitan Area, ColoradoService Provide…
Case Study: Improving Start Reliability for a Natural Gas Generator At an Oil and Gas Operations Site
Industry: Oil and GasLocation: Weld County, ColoradoService Provided: Fuel System Diagnostic, Regula…
Case Study: Streamlining Fuel Delivery and Account Setup for an Agricultural Processing Facility
Industry: Agriculture / Food ProductionLocation: Northern ColoradoService Provided: Fuel Delivery Se…
Case Study: Transparent Project Billing for a Manufacturing Facility’s Generator Removal and Fuel Tank Disposal
Industry: Industrial ManufacturingLocation: Greater Denver Area, ColoradoService Provided: Generator…
Case Study: Clarifying Major vs Minor Preventative Maintenance for a Healthcare Facility
Industry: Healthcare / RehabilitationLocation: Fort Collins, ColoradoService Provided: Preventative …
Case Study: Resolving Persistent Start Failures Caused by Gas Pressure and Regulator Issues
Industry: Healthcare / Medical OfficeLocation: Longmont, ColoradoService Provided: Generator Diagnos…
Learn about our generator Preventative Maintenance packages
Preventative Maintenance
Tailored PM schedules (monthly, quarterly, semi-annual, annual).
Fluid analysis, filter changes, visual inspections, system checks.
Benefits: Extended lifespan, reduced breakdowns, optimized performance.
Emergency Repair
24/7 availability, rapid on-site response.
Troubleshooting, fault diagnosis, component replacement.
Focus on getting power restored quickly and safely.
Load Bank Testing
Purpose: Verifying generator capacity, removing wet stacking.
Types: Resistive, reactive, inductive (if applicable).
Benefits: Ensures generator performs under real-world conditions.
Major Overhauls
When a generator needs significant attention.
Extending the life of existing assets.
Cost-effective alternative to replacement.
Control Panel & ATS
Troubleshooting, repair, and upgrades for control systems.
Ensuring seamless power transfer.
Fuel System Maintenance
Preventing fuel contamination issues.
Fuel polishing, tank cleaning, filter replacement.