Kohler · REOZ Series (Diesel Commercial Standby)
410 kW standby · Diesel · Liquid-cooled
410 kW diesel commercial standby generator powered by John Deere. Mid-range diesel workhorse for commercial, healthcare, and institutional applications.
The Kohler 400REOZJD is a 410-kilowatt diesel generator powered by a John Deere engine at 1800 RPM. Typical applications include commercial buildings, healthcare facilities, and institutional campuses.
OnPoint Generators services Kohler REOZ diesel generators throughout Northern California. We typically structure accounts for mid-range diesel units around annual NFPA 110 service plus semi-annual fuel and filter inspections.
Ready to order this model?
Lock the enclosure, fuel system, transfer switch, and add-ons — we'll confirm pricing, availability, and lead time within one business day. Prefer a free-form quote? That option is still here.
Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimated runtime
8.4 hours(0.3 days)
Fuel consumption ≈ 23.84 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 400REOZJD 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.
Kohler
400 kW diesel standby with sub-3% THD -- John Deere 6135HF485S. Healthcare and data center default in this power class.
400 kW standby · Diesel · Liquid-cooled
400 kW diesel commercial standby generator powered by John Deere. Mid-range diesel workhorse for commercial, healthcare, and institutional applications.
Kohler
500 kW diesel standby -- John Deere 6135HFG75, sub-3% THD. Decision-Maker controller for load management and paralleling.
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.
Kohler
400 kW industrial gaseous -- PSI/Doosan D219L with PM alternator, sub-3% THD. No fuel tank, no SPCC, lower emissions than diesel.
400 kW standby · LPG · Liquid-cooled
400 kW LPG industrial standby generator. Enclosed gaseous standby with PSI/Doosan engine and pilot-excited permanent-magnet alternator.
We service every major OEM and stock genuine parts for the most common models.