Universal Diesel Compatibility: Engineered as a direct replacement hand primer feed pump for Zexel and Bosch systems found in Isuzu, Fuso, and Hino commercial trucks with 5.2L, 7.8L, and 7.7L engines. Wide Agricultural Application: Specifically designed to fit Case IH tractor models 770, 870, 970, and 1030, ensuring a perfect fit and reliable fuel delivery for heavy-duty farming equipment. OEM Specification Match: Replaces multiple OEM part numbers including 1666599004, 2447222126, ME717630, 9441610017, and 2447010038 for a seamless installation experience. Durable Aluminum Construction: Manufactured from high-grade aluminum to withstand harsh engine environments, providing superior resistance to corrosion and fuel-system pressure. Efficient Fuel Priming: Essential for bleeding air from the fuel system after filter changes or maintenance, ensuring rapid engine starts and consistent performance in industrial and automotive applications. Arko Tractor Parts New Aftermarket Diesel Primer Hand Feed Pump For Zexel Bosch OEM Part Numbers: 1665534W00, 1666599004, 2447222126, 9441610017, ME717630, 2447010038