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Mechanical Pumps

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Our range of mechanical pumps includes traditional Rotary and Inline Injection Pumps. These pumps, including both purely mechanical and some early electronically-assisted versions (like the Delphi DP series), are renowned for their reliability and are crucial for maintaining older, high-mileage engines in 4×4, commercial transport, agricultural, and industrial equipment.
A Mechanical Pump uses mechanical means—such as a rotary distributor or plungers in an inline unit—to precisely time and meter the fuel quantity delivered to the engine’s injectors. While lacking the fine electronic control of newer systems, these pumps are durable and are the lifeblood of many legacy diesel workhorses still operating today.
At Cairns Diesel Service, we specialise in providing new and expertly reconditioned exchange pumps, ensuring that these critical components perform reliably for years to come.

Our comprehensive inventory of Mechanical Pumps covers essential engine platforms from leading manufacturers, including:

Toyota: We stock pumps for many of the most famous and reliable Toyota engines, including the naturally aspirated 1HZ (4.2L Land Cruiser / Coaster), the early turbo-diesel 1HD-T, and the commercial 3L and 5L Hilux and Hiace engines.

Nissan: We provide pumps for the TD42 and TD42-T (4.2L) engines found in the Nissan Patrol.

Perkins & CAT: Extensive coverage for industrial and power generation applications, including pumps for the Perkins 1104C and 1104D engines, often used in Gensets and CAT equipment.

Holden & Isuzu: Including Zexel pumps for older Holden Rodeo models with the 4JB1 and 4JB1-T engines.

Cummins: Supplying remanufactured fuel supply pumps for heavy-duty engines like the M11, N14, and QSM11.

JCB / New Holland / Iveco: Providing Delphi (Lucas/CAV) DP series pumps for various construction, agricultural, and commercial engines, such as the JCB 444TC.

We stock and service systems from key original equipment manufacturers, including Denso, Zexel, Delphi (Lucas/CAV), and Bosch. Trust Cairns Diesel Service to deliver the quality replacement Mechanical Pump you need to keep your classic diesel engine running strong.