Gillette · T4D Series (Tier 4 Final Prime Diesel)

Gillette T4D-2500

250 kW standby · Diesel · Liquid-cooled

250 kW Tier 4 Final / Stage 5 diesel generator with Volvo Penta TAD1381VE 12.8L engine. SCR aftertreatment, DEF, Basler DGC-2020 controller. Made in USA.

Gillette Gillette T4D-2500 generator — specifications and details
Standby power
250 kW / 250 kW prime
Voltage options
120/208V, 120/240V, 277/480V, 346/600V
Frequency / Phase
60 Hz · 3-phase
Engine
Volvo Penta TAD1381VE · 12.8L
EPA / Emissions
Tier 4 Final
Alternator
Stamford S4L1D-D311
CommercialHealthcareprime-powerGovernmentrentalData Centers
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Overview#

The Gillette T4D-2500 is a 250-kilowatt Tier 4 Final / EU Stage V dual-certified diesel generator on Volvo's TAD1381VE — a 12.8L turbocharged inline-6 with SCR aftertreatment. Rated at 250 kW for both standby and prime. Stamford S4L1D alternator, Basler DGC-2020 controller.

The T4D-2500 begins the 12.8L Tier 4 Final sub-family (T4D-2500, T4D-3000, T4D-3500) — the Tier 4 counterpart to the SPVD-3000/3500/4000 Tier III models.

Our service experience#

The Volvo 12.8L in Tier 4 Final configuration adds SCR and DEF to the same engine platform we service extensively on SPVD and Blue Star Tier III units. The core engine maintenance is identical — the additional service item is the DEF system: fluid quality, catalyst condition, and diagnostics monitoring.

Engineering specifications

Physical

Length
200 in
Width
72 in
Height
82 in
Wet weight
6,077 lb

Acoustic

Sound @ 7m, full load
83 dBA
Enclosure
Sound-attenuated

Fuel system & runtime

Fuel use @ full load
18.2 GPH

Documents & downloads

Spec sheets & manuals

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Configure your Gillette T4D-2500

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.

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Estimate runtime for the Gillette T4D-2500

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

14.2 hours(0.6 days)

Fuel consumption ≈ 14.04 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-2500 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.

ComponentSymptomTypical hoursSeverity
DEF system (SCR catalyst)Derate warning, NOx fault, DEF quality alert4,380+moderate
Fuel qualityInjector fouling, hard starting4,380+moderate
BatteryFailed to start, slow crank8,760+minor

Frequently Asked Questions

Is the TAD1381VE related to the SPVD-2500's TAD852GE?
The TAD1381VE is the Tier 4 Final variant of the 12.8L Volvo platform — related to the TAD1351GE in the SPVD-3000 (Tier III, same 12.8L) but with SCR aftertreatment and Stage V certification. Both are 12.8L inline-6 engines with Delphi E3 fuel injection.
What DEF consumption at 250 kW?
Approximately 6% of diesel consumption. At 18.2 gal/hr diesel, expect ~1.1 gal/hr DEF. Plan DEF storage and delivery logistics alongside diesel supply.

Compatible equipment

Engine

Transfer switches

More in the T4D Series (Tier 4 Final Prime Diesel)

100–600 kW Tier 4 Final diesel with equal standby and prime ratings — Volvo VE-series with SCR.

View all 7models in this series →

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