QSB6.7 QSB5.9 common rail pressure relief valve for Cummins parts 3963808

QSB6.7 QSB5.9 common rail pressure relief valve for Cummins parts 3963808

product description

introduce

The Common Rail Pressure Relief Valve with part number 3963808 is an important component for Cummins QSB6.7 and QSB5.9 engines. Here is a detailed introduction:

### Basic Information
- **Part Number**: The main part number is 3963808, which may have some cross - reference numbers. It is applicable to various vehicle brands and models equipped with Cummins QSB6.7 and QSB5.9 engines, including some models of trucks, buses, and construction machinery.
- **Function**: The primary function of this valve is to maintain the fuel pressure in the common rail system of the engine within a safe and appropriate range. In the common rail fuel injection system of Cummins QSB6.7 and QSB5.9 engines, the fuel is stored in the common rail at a high pressure. The pressure relief valve monitors the pressure in the common rail and opens when the pressure exceeds the set value to release the excess fuel back to the fuel tank, thereby preventing the fuel system from being damaged due to excessive pressure.

### Working Principle
- The pressure relief valve operates based on the principle of balancing the spring force and the fuel pressure. Inside the valve, there is a spring - loaded plunger. Under normal operating conditions, the spring force keeps the plunger in a closed position, blocking the fuel passage. When the pressure in the common rail rises above the set pressure, the fuel pressure overcomes the spring force, causing the plunger to move and open the valve, allowing the fuel to flow out through the relief passage. As the fuel pressure decreases to the normal range, the spring force pushes the plunger back to the closed position, stopping the fuel from flowing out.

### Installation and Maintenance
- **Installation**: The pressure relief valve is usually installed on the common rail of the fuel injection system. The specific installation location may vary slightly depending on the engine model and the overall layout of the vehicle or equipment. During installation, it is necessary to ensure that the valve is properly connected and sealed to prevent fuel leakage.
- **Maintenance**: Regular inspection and maintenance of the pressure relief valve are required. Check for any signs of fuel leakage, loose connections, or damage to the valve. Clean the valve regularly to remove dirt and debris that may affect its performance. It is also recommended to check the pressure - relief set value regularly to ensure that it is within the normal range. If any problems are found, the valve should be repaired or replaced in a timely manner to ensure the normal operation of the fuel injection system.

### Troubleshooting
- If the engine experiences problems such as abnormal fuel pressure, rough idling, or reduced power, the common rail pressure relief valve may be faulty. Some common problems include a stuck valve plunger, a damaged spring, or a leaky valve seat. To troubleshoot, first check the external connections and appearance of the valve. Then, use a pressure gauge to measure the fuel pressure in the common rail to determine if it is within the normal range. If the pressure is abnormal, further inspection of the pressure relief valve is required, and it may need to be replaced if necessary. necessary.

COMPANY INFORMATION

Guangzhou Tengsong Machinery Equipment Co., Ltd. is a large-scale enterprise loed in Guangzhou, a famous city in China, where the largest distribution center for construction machinery parts is loed in Asia. Founded in 2003, with more than 18 years of practice and experience, we have established a complete ordering and delivery service system. Our company specializes in wholesale OEM spare parts for construction machinery companies.

Company Profile

广州腾松工程机械设备有限公司，专业柴油发动机配件，18年行业经验，专注于工程机械、农业、发电机组、船舶、挖掘机、装载机、推土机、平地机、起重机、卡车、叉车等DAILY REFINING品牌机械发动机配件。我们与欧洲、美洲、中东和东南亚地区合作，并在50多个国家建立了业务关系。

DAILY REFINING品牌：品质与创新的发动机零部件品牌

DAILY REFINING 是一个致力于提供高品质创新型发动机零部件的品牌。通过持续的研发和严格的质量控制，DAILY REFINING 为全球汽车和机械行业提供高品质的发动机零部件解决方案。本文将介绍 DAILY REFINING 品牌在发动机零部件领域的核心价值、技术实力及其卓越地位。

DAILY REFINING 的品牌核心价值体现于其对品质和可靠性的承诺。他们注重产品性能、耐用性和安全性，并致力于为客户提供卓越的发动机零部件。品牌价值观包括卓越的品质、领先的创新能力和客户满意度，这些价值观贯穿于 DAILY REFINING 的产品和服务之中。

日精拥有专业的研发团队和先进的生产设备，奠定了坚实的技术实力基础。他们持续投入研发，并与行业领先的合作伙伴携手，不断推动发动机零部件技术的创新。日精的发动机零部件经过严格的测试和质量控制，确保其在各种工况下的可靠性和卓越性能。

DAILY REFINING 的发动机零部件产品线广泛覆盖船舶、工业机械等多个应用领域。我们提供活塞、曲轴、缸套、缸盖等各种类型的零部件，以满足不同发动机的需求。无论是传统的燃油发动机还是先进的电动汽车发动机，DAILY REFINING 都致力于提供高质量、高性能的发动机零部件。

DAILY REFINING对产品质量有着严格的把控和保障。他们采用先进的生产工艺和质量管理体系，确保每一个发动机部件都符合高标准。DAILY REFINING的零部件经过长期的实验和验证，即使在严苛的工作环境下也能保持稳定可靠的性能。

作为一家专注于品质与创新的发动机零部件品牌，DAILY REFINING凭借卓越的技术实力和不懈的努力，在业界树立了良好的口碑。他们提供多样化的发动机零部件解决方案，为全球汽车和机械行业的发展做出了重要贡献。未来，我们期待DAILY REFINING继续引领发动机零部件领域的创新，为客户提供更可靠、更高性能的发动机零部件，推动整个行业的发展。