The Rehlko KDI‑TCQ 1903U3/26 is part of Rehlko’s KDI 1903 engine family and is rated at 42 kW (56 hp) @ 2600 rpm, making it well suited to compact equipment that needs confident working power without stepping up to a larger engine class. The KDI platform is widely specified across industrial and mobile applications, valued for its balance of performance, packaging efficiency, and long-term supportability.

For OEMs, the benefit is a modern diesel engine family with clear variant identification and well-established application coverage. For operators and service teams, it’s about predictable operation and a supportable lifecycle — with documentation, parts availability, and a variant code that helps keep procurement and maintenance aligned.

If you’re selecting this engine for a build, the most important step is confirming the integration package: cooling arrangement, intake/exhaust routing, mounting points, and electrical interfaces. Share your application and installation constraints and we’ll help confirm that 1903U3/26 is the correct match before you commit.