Kohler · REOZ Series (Diesel Commercial Standby)
500 kW standby · Diesel · Liquid-cooled
500 kW diesel commercial/industrial standby generator powered by John Deere. Suitable for hospitals, data centers, and large commercial complexes.
The Kohler 500REOZJ is a 500-kilowatt diesel generator powered by a John Deere engine at 1800 RPM. This unit serves large commercial and industrial standby applications including hospitals, data centers, and manufacturing facilities.
OnPoint Generators services Kohler REOZ diesel generators throughout Northern California. We service units in this class with annual NFPA 110 maintenance, semi-annual inspections, and load bank testing up to full rated capacity.
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Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimated runtime
7.3 hours(0.3 days)
Fuel consumption ≈ 27.39 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.
Manufacturer-recommended intervals for the Kohler 500REOZJ under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.
| Component | Symptom | Typical hours | Severity |
|---|---|---|---|
| Fuel quality / degradation | Injector fouling, hard starting, filter clogging | 4,380+ | moderate |
| Turbocharger | Power loss, excessive smoke under load | 12,000+ | moderate |
| Battery (starting) | Failed to start, slow crank | 8,760+ | minor |
Kohler's diesel commercial standby series — 10 to 510 kW, John Deere and Kohler engines, built for life-safety loads.
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We service every major OEM and stock genuine parts for the most common models.