OverviewCompact 4-cylinder diesel engine designed for prime and standby power applications. The Perkins 904J-E36TAG ElectropaK meets EU Stage V emissions and is engineered for straightforward integration into generator sets and off-highway electrical power systems.
Features at a glance- Dependable power: Proven core design and world-class manufacturing deliver reliable mechanical output and quiet operation across ratings. Turbocharging with smart wastegate available.
- Integration flexibility: ElectropaK configuration simplifies radiator, control and mounting interfaces for varied generator applications and OEM requirements.
- Low lifetime cost: Optimised fuel consumption for prime duty, hydraulic tappets, long oil-change intervals and service-free aftertreatment reduce operating and maintenance costs.
Key specs- Gross Mechanical Output: 50–61 kW
- Typical Electrical Output: 54–66 kVA (43–53 kWe)
- Emissions: EU Stage V
- Displacement: 3.6 L
- Rated speed: 1500 / 1800 rpm
Standard equipment- Air inlet system: Standard air cleaners
- Cooling system: 50:50 water/glycol mix; ElectropaK includes radiator
- Control system: Full electronic control with SAE J1939 CAN bus support and waterproof connectors for harsh environments
- Flywheels and housing: Includes SAE No. 2 and SAE No. 3 flywheel housings
- Fuel system: Electronic high-pressure common rail with protective filter design
- Oil system: Aluminium, flat-bottomed isolated sump
- Emissions control: NRS – NOx Reduction System
Technical specifications- Model: 904J-E36TAG
- Brand: Perkins
- Gross Mechanical Output: 50–61 kW
- Typical Electrical Output (50 Hz): Prime 60 kVA; Standby 66 kVA
- Typical Electrical Output (60 Hz): Prime 43 kWe; Standby 47 kWe
- Emissions: EU Stage V
- Rated speed: 1500 / 1800 rpm
- Number of cylinders: 4 vertical inline
- Bore × Stroke: 98 mm × 120 mm
- Displacement: 3.6 L
- Compression ratio: 17:1
- Aspiration: Turbocharged aftercooled
- Combustion system: Direct injection
- Rotation (flywheel end): Anti-clockwise
- Cooling system: Liquid
- Typical alternator efficiency: 89.5–92%
- Switchable: Yes
- ElectropaK dimensions (typical): L 1056 mm; W 693 mm; H 1083 mm
- Dry weight (ElectropaK, typical): 511 kg
- Note: Final dimensions and outputs dependent on selected options; prime and standby definitions per manufacturer.