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Unit Pumps (EUP): Individualised Precision for Heavy-Duty Performance
Cairns Diesel Service stocks a range of brand-new genuine unit pumps (EUP) and expertly remanufactured exchange unit pumps to keep your heavy-duty fleet moving efficiently.
Our selection focuses on the primary manufacturers and heavy-truck platforms that rely on this technology, including:

Mercedes-Benz: We supply genuine Bosch Unit Pumps for Mercedes-Benz commercial engines (such as the OM series), ensuring the reliability and longevity expected of the Actros and other heavy-haulage models.
Mack Trucks: Featuring EUP solutions for the powerful Mack E7 engine series, including the E7-350.
Renault: Providing precision-matched pumps for Renault heavy commercial vehicles that share engine platforms with the Mack E-Series.

We are proud to supply systems from world-leading manufacturers like Bosch, the primary pioneer of EUP technology. Whether you are looking for a New Bosch EUP or a cost-effective Reman Mack EUP, trust the certified experts at Cairns Diesel Service to provide the technical expertise and quality parts your heavy-duty engine requires.

About Unit Pumps
Also known as Electronic Unit Pumps (EUP), these components represent a modular approach to high-pressure fuel injection. Unlike a centralised injection pump, these pump systems utilise individual high-pressure pumps for each engine cylinder, driven directly by the engine’s camshaft. This design allows for exceptionally high injection pressures and precise electronic control over fuel delivery, making it a preferred choice for heavy-duty commercial vehicles and industrial engines.
The Unit Pump bridges traditional mechanical pumping and modern electronic management. By locating the pump close to the injector and controlling it via an integrated solenoid, the system minimises high-pressure line length, resulting in sharper injection timing and improved thermal efficiency. Because each pump operates independently, maintaining the health of these individual units is critical to ensuring balanced engine performance and preventing excessive vibration or power loss.