300 kW Tier 4 Final / Stage 5 diesel generator with Volvo Penta TAD1383VE 12.8L engine. Water-to-air aftercooled, SCR+DEF, Basler DGC-2020. Made in USA.
The Gillette T4D-3000 is a 300-kilowatt Tier 4 Final / Stage V diesel generator on Volvo's TAD1383VE — a 12.8L inline-6 with water-to-air aftercooling and SCR aftertreatment. This is the T4D lineup's transition to H2O-to-air cooling (the T4D-2500 uses air-to-air). Rated at 300 kW for both standby and prime. Basler DGC-2020 controller.
The T4D-3000 combines two heat sources: the turbocharged 12.8L at 469 bhp AND the SCR catalyst system's exothermic reaction. Water-to-air aftercooling provides better charge cooling consistency under this combined thermal load. The Tier III SPVD-3000 (same 12.8L at 300 kW) uses air-to-air because it doesn't have the SCR heat contribution.
At 300 kW Tier 4 Final, the T4D-3000 requires both standard diesel service and DEF/SCR maintenance. The water-to-air aftercooler adds an additional coolant circuit to monitor. We treat every T4D service visit as three systems: engine, cooling, and aftertreatment.
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.
Estimate runtime on this tank
Estimated runtime
11.8 hours(0.5 days)
Fuel consumption ≈ 16.97 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 Gillette T4D-3000 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Coolant change
Every 6000 hours
Air filter
Every 1000 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours
Load bank test
Every 12 months
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
DEF system (SCR catalyst)
Derate warning, NOx fault, DEF quality alert
4,380+
moderate
Fuel quality
Injector fouling, hard starting
4,380+
moderate
Battery
Failed to start, slow crank
8,760+
minor
Frequently Asked Questions
Why does the T4D-3000 switch to water-to-air aftercooling?
At 300 kW from 12.8L (469 bhp, same as the Tier III SPVD-3000's TAD1351GE), the T4D-3000 uses H2O-to-air aftercooling for more effective charge cooling at high output with the additional heat from SCR aftertreatment. The T4D-2500 uses air-to-air; the T4D-3000 and T4D-3500 switch to water-to-air.
DEF consumption at 300 kW?
Approximately 6.3% of diesel. At 22.0 gal/hr diesel at full load, expect ~1.4 gal/hr DEF.
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