1204E-E44TTA Industrial Open Power Unit

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Our 1200 Series Tier 4 interim engines offer a smart solution for customers operating in EU Stage IIIB/U.S. EPA Tier 4 Interim equivalent territories. Ideally suited to large and medium-sized machines for construction, agriculture and materials handling – and also available as an IOPU – there's a Perkins 1200 Series engine for you. With common hook up points and multiple options, our solutions support your move to the more stringent Stage IV/Tier 4 Final emission standards.


4.4 litre

117-129.4 kW (157-173 hp)

Designed to meet EU Stage IIIB/U.S. EPA Tier 4 Interim equivalent emission standards

Our IOPUs are designed to be productive and to offer the impressive power density that allows our customers to maximise their profitability. The 1204E-E44TTA IOPUs is series turbocharged.

Power Rating

Minimum Power 156.9 HP 117.0 kW Less
Maximum Power 173.5 HP 129.4 kW Less
Rated Speed 2200 rpm 2200 rpm Less

Emission Standards

Emissions EU Stage IIIB/U.S. EPA Tier 4 Interim equivalent EU Stage IIIB/U.S. EPA Tier 4 Interim equivalent Less


Bore 4.13 in 105.0 mm Less
Stroke 5.0 in 127.0 mm Less
Displacement 268.5 in³ 4.4 l Less
Aspiration Series turbocharged aftercooled Series turbocharged aftercooled Less
Rotation from Flywheel End Anti-clockwise Anti-clockwise Less
Combustion System Direct injection Direct injection Less
Compression Ratio 16.5:1 16.5:1 Less
Number of Cylinders 4 inline 4 inline Less
Total Coolant Capacity 2.85 gal (US) 10.8 l Less
Cooling System Liquid Liquid Less
Total Lubricating Capacity 3.6 gal (US) 13.5 l Less

Engine Dimensions

Dry Weight 1543.2 lb 700.0 kg Less

Engine Dimensions*

Height 45.3 in 1150.0 mm Less
Length 56.4 in 1433.0 mm Less
Width 45.3 in 795.0 mm Less

Aftertreatment Dimensions* - DOC/DPF > 82 kW (110 hp)

Diameter 10.6 in 270.3 mm Less
Height 11.8 in 300.5 mm Less
Length 32.6 in 828.0 mm Less
Weight 81.6 lb 37.0 kg Less
Width 14.3 in 365.0 mm Less

A lifetime of low cost

We designed our 1200 Series Tier 4 interim engines with optimised fuel consumption in mind, matching them to the operating cycles of a wide range of equipment and applications.

Low cost maintenance is achieved through hydraulic tappets, multi-vee belts, service free aftertreatment and 500 hour oil-change intervals.

Easy to switch

All the engines in our 1200 Series share common hook up points and option availability, ensuring our solutions can support your move to the more stringent Stage IV/Tier 4 Final emission standards. Our technology consistently delivers with a minimum of difficulty.

Like you, we believe there is no need for a trade-off between meeting emission standards and delivering on performance. The 1200 Series tackles the emissions challenge head-on and gives you improved productivity levels and fuel consumption compared to previous generation Stage IIIA/Tier 3 engines.

Ideal for downsizing

High power density, combined with excellent torque in our 1200 Series Tier 4 interim range allows you to select a more compact engine where previously you might have used an engine of a higher cubic capacity. This downsizing has several benefits, including the potential to save you money and provide more space to package aftertreatment units.

Tailored for your machine

Your needs are our top priority, which is why we provide tailored technology solutions. Working closely with OEMs, we have developed the 1200 Series with hundreds of variables so that it easily fits into your machine.

Our 1200 Series interim engines come with two year warranties as standard and great value extended service contracts.

1204E-E44TTA Industrial Open Power Unit Standard Equipment

Aftertreatment technology
  • 3ʺ flex pipe kits available with a variety of elbow options for turbocharger connection
  • DOC – Diesel Oxidation Catalyst
  • DPF – Diesel Particulate Filter

Air inlet system
  • Standard air cleaners

Control system
  • Full electronic control system, all connectors and wiring looms waterproof and designed to withstand harsh off-highway environments
  • Flexible and configurable software features and J1939 standard communications I/O

Cooling system
  • Engine mounted radiator with top tank temperature 108°C (226°F)
  • 50:50 water glycol mix

Flywheels and flywheel housing
  • Wide choice of drivetrain interfaces, including SAE No. 2 and SAE No. 3 configurations

Fuel system
  • Electronic high pressure common rail
  • Standard and heavy duty fuel filtration

  • Available with or without a balancer
  • Pusher or puller fan options

Oil system
  • Wide choice of sumps for different applications

Power take-off
  • SAE A and SAE B flanges on left-hand side. Additional SAE A flange available on left-hand side. Engine power can also be taken from the front of the engine on some applications. Factory fitted compressors are also available.

Standard emissions control equipment
  • NRS - NOx Reduction System