Diesel engine 403D-11

3-cylinderin-linewater cooling

Overview
The Perkins 400 Series covers compact industrial engines in the 0.5–2.2 L range. The 403D-11 is a 3‑cylinder, 4‑stroke open power unit delivering 19.7 kW, designed for space‑constrained industrial applications. Its simple mechanical fuel system and proven cast‑iron construction facilitate easy installation, service and long operational life.

Key specs (high level)
Maximum power: 19.7 kW
Maximum torque: 67 Nm @ 2400 rpm
Rated speed: 3400 rpm
Emissions: UN ECE R96 Stage IIIA

Features at a glance

• Low operating cost: competitive fuel economy and optimised power bands to reduce total cost of ownership; global product support and standard warranty for selected configurations.
• Compact package: engineered for skid steer loaders, mini excavators, small wheel loaders, welders, lift platforms, lighting towers, small tractors, air compressors, turf care and materials‑handling equipment.
• Refined performance: 3‑cylinder design offering a smooth power delivery within the Perkins 400 range, with indirect injection for noise and combustion control.

Standard equipment (selected)
Air System

• Cast iron exhaust manifold — side outlet
• Inlet manifold
• Mounted air cleaner

Electrical and Electronics

• 12 V alternator
• 12 V 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 5 flywheel housing
• SAE flywheel — 165.1 mm (6½ in)

Fuel System

• Fuel injection pump
• Fuel filter

General

• Cast iron engine block
• Glow plug starting aid

Oil System

• Lubricating oil pressure switch
• Lubricating oil sump
• Spin‑on lubricating oil filter

Product specifications (extract - tabular data represented line by line)
Power Rating
Maximum power: 19.7 kW
Maximum torque: 67 Nm @ 2400 rpm
Rated speed: 3400 rpm
Minimum power: 14.7 kW

Emission Standards
Emissions: UN ECE R96 Stage IIIA

General
Number of cylinders: 3 inline
Cycle: 4‑stroke
Bore: 77 mm
Stroke: 81 mm
Displacement: 1.1 L
Compression ratio: 23.0:1
Aspiration: Naturally aspirated
Combustion system: Indirect injection
Rotation from flywheel end: Anti‑clockwise
Aftertreatment: None specified
Cooling system: Liquid

Engine Dimensions*
Length: 777 mm
Width: 438 mm
Height: 729 mm
Dry weight: 129 kg

Notes / Disclaimer (excerpt)
*Final dimensions dependent on selected options

Technical highlights

• Model: 403D-11
• Manufacturer / Brand: Perkins
• Typical applications: small industrial equipment (skid steer loaders, mini excavators, wheel loaders, welders, lift platforms, lighting towers, small tractors, air compressors, turf care, materials handling)
• Approx. dry weight: 129 kg
• Approx. dimensions (L×W×H): 777 mm × 438 mm × 729 mm