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Rehlko KDI-TCL 3404U4/22 Industrial Diesel Engine

The Rehlko KDI‑TCL 3404U4/22 is a compact 4‑cylinder turbo common‑rail diesel engine delivering 55.4 kW (74 hp) at 2600 rpm. It’s designed for OEM machinery and industrial equipment that need strong, dependable power in a space-efficient package, with modern fuel injection and a well-supported engine platform for long-term service and parts availability.
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Quick Spec Check

Engine Series:
Industry Type:
Engine Speed:
Power kW:
Max Torque:
Emissions:
KDI Series
Industrial
2200 rpm
55.4
375 @ 1400rpm
EU STAGE IIIB, US TIER4 FINAL
The Rehlko KDI‑TCL 3404U4/22 brings the KDI platform into a higher-output, 4‑cylinder format, rated at 55.4 kW (74 hp) @ 2600 rpm. Built around turbocharging and common‑rail fuel injection, it’s well-suited to equipment that needs confident working power, consistent performance under load, and a modern diesel package that integrates cleanly into compact machine bays.
For OEMs, the KDI 3404 family is attractive because it balances power density with practical installation. The 4‑cylinder layout supports smooth operation for applications where refinement and steady-duty performance matter, while the turbo common‑rail configuration helps deliver responsive output for real-world duty cycles.
The best results come from matching the engine to the full installation package — cooling capacity, intake/exhaust routing, mounting points, and electrical interfaces. If you’re replacing an existing unit or specifying for a build, share the current engine plate code and application details and we’ll help confirm the correct variant and fitment before ordering.
Engine Details
Information on the main core details of the engine
Engine Series

KDI Series
Industry Type

Industrial
Engine Perfomance
Engine Speed

2200 rpm
Power kW

55.4
Max Torque Nm

375 @ 1400rpm
Emissions Compliant
Emissions

EU STAGE IIIB, US TIER4 FINAL
Design Features
SAE Connection

SAE3/11.5
Radiator

Yes
Fan

Yes
Technical Features
Aspiration

Turbo Aftercooled
Cylinders

4
Injection System

DI
Injection Equipment

HPCR
EGR

Yes
DOC

Yes
DPF

No
CAC

Yes
Physical Characteristics
Engine Length

726mm
Engine Width

576mm
Engine Height

816mm
Engine Weight

394kg (Dry)

Technical Documents

Technical Datasheet

Parts & Warranty

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Parts List

Applications

The Rehlko KDI‑TCL 3404U4/22 is a strong fit for compact industrial and mobile machinery that needs 55.4 kW at 2600 rpm from a modern 4‑cylinder diesel. Typical applications include construction and utility equipment, industrial power units, pumps, compressors, and specialist OEM machinery where dependable output and serviceability are priorities.
It’s particularly relevant where equipment runs for extended periods under load and benefits from the smoothness and stability of a 4‑cylinder platform. In OEM builds, correct selection comes down to duty cycle, cooling pack sizing, and packaging constraints. In replacement scenarios, matching the exact variant code is essential, as KDI 3404 models can differ by emissions configuration and integration details.