Diesel engine 904J-E36TAG

4-cylindercommon-railturbocharged

Overview
Perkins 904J ElectropaK is a 4‑cylinder, 3.6 L turbocharged aftercooled diesel engine engineered for generator-set applications. Designed for straightforward integration, the 904J meets EU Stage V and US EPA Tier 4 Final emissions requirements while offering a gross mechanical output of 50–55 kW and typical electrical output of 54–60 kVA (43–47 kWe) at 1500/1800 rpm.

Key Specifications

• Gross Mechanical Output: 50–55 kW
• Typical Electrical Output: 54–60 kVA (43–47 kWe)
• Emissions: EU Stage V, US EPA Tier 4 Final
• Rated Speed: 1500/1800 rpm

Features At A Glance

• Dependable power: Proven core engine design with world-class manufacturing ensures reliable, quiet operation and long service life. Turbocharging with smart wastegate available across ratings for high power density and efficiency.
• Integration flexibility: ElectropaK configuration simplifies installation and supports multiple application choices and control interfaces.
• Low lifetime operating cost: Fuel-optimised for prime and continuous duty. No additional fluids/additives required; hydraulic tappets, multi-vee belts, service-free aftertreatment and 500‑hour oil change intervals reduce maintenance burden.

Product Specifications (summary)
Total Power Range
Gross Mechanical Output | 50–55 kW
Typical Electrical Output | 54–60 kVA (43–47 kWe)
Rated Speed | 1500/1800 rpm

Emission Standards
Emissions | EU Stage V, US EPA Tier 4 Final

50 Hz Typical Electrical Output
Prime | 54 kVA
Standby | 60 kVA

60 Hz Typical Electrical Output
Prime | 43 kWe
Standby | 47 kWe

General
Number of Cylinders | 4 vertical inline
Bore | 98 mm
Stroke | 120 mm
Displacement | 3.6 l
Compression Ratio | 17:1
Aspiration | Turbocharged aftercooled
Combustion System | Direct injection
Rotation from Flywheel End | Anti-clockwise
Cooling System | Liquid
Aftertreatment | -
Typical Alternator Efficiency | 89.5-92%
Switchable | Yes

ElectropaK Dimensions
Length | 1056 mm
Width | 693 mm
Height | 1083 mm
Dry Weight | 511 kg

Engine Dimensions*
Width | 693 mm
Height | 1083 mm
Length | 1056 mm
Dry Weight | 511 kg

Disclaimer
*Final dimensions dependent on selected options

Definitions
Prime Power | Power available at variable load in lieu of a main power network. Overload of 10% permitted for one hour in every 12 hours of operation.
Standby Power | Power available at variable load in the event of a main power network failure. No overload is permitted.

Standard Equipment

• Air inlet system: Standard air cleaners
• Cooling system: 50:50 water glycol mix; ElectropaK - radiator fitted
• Control system: Flexible configurable software features with supported SAE J1939 CAN bus; full electronic control with waterproof connectors and wiring looms for harsh off-highway environments
• Flywheels and flywheel housing: Includes SAE No. 2 and SAE No. 3 flywheel housing
• Fuel system: Electronic high pressure common rail with protective filter design
• Oil system: Flat-bottomed, isolated aluminium sump
• Standard emissions control equipment: NRS – NOx Reduction System

Technical specifications

• Model: 904J-E36TAG
• Brand: Perkins
• Gross Mechanical Output: 50–55 kW
• Typical Electrical Output: 54–60 kVA (43–47 kWe)
• Emissions: EU Stage V, US EPA Tier 4 Final
• Rated Speed: 1500/1800 rpm
• Cylinders: 4 vertical inline
• Bore x Stroke: 98 mm x 120 mm
• Displacement: 3.6 l
• Compression Ratio: 17:1
• Aspiration: Turbocharged aftercooled
• Combustion: Direct injection
• Rotation: Anti-clockwise (from flywheel end)
• Cooling: Liquid
• Typical alternator efficiency: 89.5-92%
• ElectropaK dimensions (L x W x H): 1056 x 693 x 1083 mm
• ElectropaK dry weight: 511 kg
• Service intervals: 500 hour oil change intervals; service-free aftertreatment
• Standard equipment highlights: radiator-fitted ElectropaK, full electronic control, common rail fuel system, NRS emissions control