Pressurizing the fuel system after service is essential for proper fuel system operation and efficient starting. The OTC 5869 Fuel System Priming Pump is an ideal tool for providing pressurized diesel fuel to bleed the air from the system, allowing for immediate, proper fuel pressure. The high-quality, 3 gallon stainless steel tank prevents corrosion while the heavy-duty hand pump assembly provides smooth operation and long life. Attaches to the system with a 'compu-check' quick-connect fitting at the end of a 6 foot pressure hose. Applications include Detroit Diesel S60, MBE900, and MBE4000. Similar to J-47912.