The Winco DR35F4 is a 35 kW standby diesel generator powered by an FPT Industrial N45-family 4.5-liter turbocharged diesel engine with a Stamford alternator. It is the first FPT-powered unit in Winco's DR enclosed diesel standby series, available in single-phase (120/240V) and three-phase (277/480V) configurations. EPA Tier 4 Final certified. 100% US-made in Le Center, Minnesota since 1927.
The DR35F4 marks the transition from Isuzu to FPT engines in the DR lineup. At 35 kW and above, the DR series uses FPT Industrial diesel platforms from CNH Industrial — the same engine family that powers Case IH and New Holland agricultural equipment worldwide.
Winco has manufactured generators in Le Center, Minnesota since 1927 — making it America's oldest generator manufacturer. Every DR35F4 is built, wired, and tested at that US facility, with US labor and components.
The DR35F4's non-proprietary design is deliberate: an FPT Industrial engine (serviceable at any Case IH or New Holland dealer or independent diesel shop) paired with a Stamford alternator (the most widely deployed alternator in the world). This combination makes the DR35F4 fully independent from Winco's own distribution network. For municipalities, school districts, and federal facilities with Buy American procurement requirements, this is a qualifying US-manufactured product.
Oil and fuel filter changes every 500 hours or annually — diesel fuel sitting in a standby tank degrades, so the annual interval applies even on lightly exercised units. Air filter inspection at 500 hours. The FPT N45 engine uses standard diesel shop consumables available through any CNH Industrial dealer or diesel parts supplier.
The Stamford alternator requires periodic inspection of brushes, bearings, and winding insulation. No special tooling required. Major overhaul interval is 20,000 hours — a benchmark that long-cycle standby generators with low annual hours will rarely reach in their operational lifetime.
Transfer switch contacts should be exercised weekly. Standby generators that sit without load testing develop contact oxidation that causes slow or failed transfers during actual outages.
OnPoint Generators services Winco DR units throughout the Bay Area and Northern California. The FPT Industrial engine and Stamford alternator mean we can source parts through standard diesel channels — no waiting on a dedicated Winco dealer. The DR35F4 is a natural fit for public agencies, schools, and institutions where Buy American compliance and component independence matter more than smart monitoring or brand recognition. It is an honest, well-built US machine in a class where most competitors are assembled overseas.
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Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Estimated runtime
105.8 hours(4.4 days)
Fuel consumption ≈ 1.89 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.
Service intervals
Manufacturer-recommended intervals for the Winco DR35F4 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Air filter
Every 500 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours
Common failure modes
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 filter
Extended standby fuel degradation — change annually regardless of hours
500+
minor
Starting battery
Capacity loss in standby — float charge, test annually
4,380+
minor
Transfer switch contacts
Oxidation on standby generators — exercise weekly to maintain contact quality
8,760+
minor
Frequently Asked Questions
What is the standby kW rating of the DR35F4?
The DR35F4 is rated at 35 kW standby. It is available in both single-phase (120/240V) and three-phase (277/480V) configurations.
What engine does the DR35F4 use?
The DR35F4 uses an FPT Industrial N45 family 4.5-liter four-cylinder turbocharged diesel engine, built by CNH Industrial (Fiat Powertrain Technologies). This is the same engine family used in Case IH and New Holland agricultural equipment worldwide.
What makes Winco different from Generac or Kohler?
Winco generators use non-proprietary FPT Industrial engines and Stamford alternators — both globally supported components that any qualified diesel technician can service without OEM-specific tools or parts programs. Winco has manufactured generators 100% in Le Center, Minnesota since 1927. Generac and Kohler use proprietary engines and offer smart monitoring and denser dealer networks.
Is the DR35F4 EPA Tier 4 Final compliant?
Yes. The DR35F4 carries EPA Tier 4 Final certification — the most stringent non-road diesel emissions tier currently required for new installations.
Where are Winco generators made?
Winco generators are 100% manufactured in Le Center, Minnesota. Winco (formerly Winpower) has operated continuously at that facility since 1927 — making it America's oldest generator manufacturer. The factory, parts, and labor are all US-based.
What are the service intervals for the DR35F4?
Oil and fuel filter changes every 500 hours or annually (whichever comes first). Air filter inspection at 500 hours. Major overhaul at 20,000 hours. Transfer switch contacts should be exercised weekly to prevent oxidation during standby.
Who services Winco generators in Northern California?
OnPoint Generators services Winco units throughout the Bay Area and Northern California. Because the DR35F4 uses FPT Industrial engines and Stamford alternators — non-proprietary components — our technicians can source parts through standard diesel supply channels without waiting on a dedicated Winco dealer network.
More in the DR Series
USA-made Tier 4 diesel standby in enclosed packages — 13 to 175 kW on FPT and Isuzu engines.
