This aftermarket replacement manual primer pump, identified as part number 2447222126NO, is designed as a compatible alternative for Bosch fuel systems. It serves as a direct replacement for original Bosch manual primer pumps with part numbers 2447010038 and 2447010039. Essential for diesel engines, a manual primer pump is used to bleed air from the fuel system and ensure a continuous flow of fuel to the injection pump, facilitating easier starting after maintenance or when the fuel tank has run dry. This non-original component offers a cost-effective solution for maintaining the fuel priming function in various agricultural, construction, and industrial machinery that utilize the specified Bosch fuel system components. Manufactured to meet functional specifications, it provides reliable performance for effective fuel system priming, ensuring your equipment operates smoothly. Please note, this is a high-quality aftermarket part and not an OEM (Original Equipment Manufacturer) Bosch product.