403D-15 Industrial Open Power Unit

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The Perkins 400 Series is an extensive family of engines in the 0.5-2.2 litre range. The 3 cylinder 403-15 model is the mid-range 400 Series engine, combining performance, low operating costs and a compact package. From a packaging point of view, the 403-15 is the ideal engine for small industrial applications. Its simple, robust mechanical fuel system makes it easy to install and maintain.


1.5 litre, 3 cylinder

18.4-25.1 kW (24.7-33.7 hp)

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

A 1.5 litre IOPU offering you the advantages of an industrial engine, with the convenience of a cost effective cooling and filtration solution

Power Rating

Minimum Power 27.9 HP 20.8 kW Less
Maximum Power 32.5 HP 24.2 kW Less
Maximum Torque 69.6 lb-ft @ 1800 rpm 94.4 Nm @ 1800 rpm Less
Rated Speed 2800-3000 rpm 2800-3000 rpm Less

Emission Standards

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


Bore 3.3 in 84.0 mm Less
Stroke 3.5 in 90.0 mm Less
Displacement 91.0 in³ 1.5 l Less
Aspiration Naturally aspirated Naturally aspirated Less
Rotation from Flywheel End Anti-clockwise Anti-clockwise Less
Number of Cylinders 3 inline 3 inline Less
Cooling System Liquid Liquid Less
Combustion System Indirect injection Indirect injection Less
Cycle 4 stroke 4 stroke Less
Compression Ratio 22.5:1 22.5:1 Less

Engine Dimensions*

Width 19.6 in 497.0 mm Less
Height 31.2 in 793.0 mm Less
Dry Weight 434.0 lb 197.0 kg Less
Length 32.3 in 820.0 mm Less


Note 1 *Final dimensions dependent on selected options *Final dimensions dependent on selected options Less

A lifetime of low cost

The 400 Series offers highly competitive performance and fuel economy. Through appropriate use of technology, these engines have been designed to be reliable and to offer low cost of ownership in the wide variety of markets they serve.

Across an extensive power band, the 400 Series range offers you the ability to configure a solution to your specific machine, territory and market requirements.

Overlapping power bands between models and an extensive range of options gives the opportunity to optimise performance and functionality, adding customer value to the application.

We provide one year warranties for constant speed engines and two year warranties for variable speed models as standard.

As a 400 Series end user, you also benefit from Perkins world class product support and service coverage that comes from being a full range power solutions provider.

Compact design

The compact design of these engines makes them suitable for a range of applications, including skid steer loaders, mini excavators, wheel loaders, welders, lift platforms, lighting towers, small tractors, air compressors, turf care machinery and materials handling machinery.

Each of the six core engines of the 400 Series is configured for either Stage IIIA/Tier 4 Interim or Stage IIIB/Tier 4 Final emission standards, giving you flexibility depending on your market.

Performance and refinement

The 400 Series lineup gives you a seamless power range of 8.2-50 kW (11-67 hp) in 2, 3 and 4 cylinder models designed with a family look and feel. The range offers a wide variety of ratings and configurations that can be tailored to meet the most exacting needs.

The selective use of indirect and direct injection fuel systems enables Perkins to offer world-class engine refinement and low noise levels.

403D-15 Industrial Open Power Unit Standard Equipment

Air inlet system
  • Cast iron exhaust manifold - side outlet
  • Inlet manifold
  • Mounted air cleaner

Control system
  • 12 volt alternator
  • 12 volt starter motor
  • Electronic Shut Off Solenoid (ESOS)

Cooling system
  • Coolant pump belt driven
  • Coolant temperature switch
  • Mounted radiator and fan

Flywheel and flywheel housing
  • SAE 4 flywheel housing
  • SAE flywheel size 7½

Fuel system
  • Fuel injection pump
  • Fuel filter

  • Cast iron engine block
  • Glow plug starting aid

Oil system
  • Lubricating oil pressure switch
  • Lubricating oil sump
  • Spin on lubricating oil filter