The J 900299 Valve Spring Retainer is a critical engine valve train component used in the cylinder head and valve mechanism of CASE 580 E, Super E, K, Super K, L, and Super L backhoe loaders equipped with Cummins diesel engines.
This retainer is installed at the top of the valve spring, securing the valve spring in position and maintaining correct valve alignment during engine operation. It plays an essential role in ensuring stable valve movement, proper sealing, and consistent engine performance, especially under high temperature and high-load conditions.
Manufactured by DCEC (Dongfeng Cummins Engine Company), this component meets Original Cummins specifications, ensuring precise fitment, correct hardness, and long service life. It is commonly replaced during cylinder head overhauls, valve spring replacement, or full engine rebuilds to restore optimal valve train operation.
Key Functions:
Secures the valve spring in the cylinder head
Maintains correct valve positioning and spring compression
Supports smooth and reliable valve operation
Essential for proper combustion and engine efficiency
Compatible Models:
CASE 580 E
CASE 580 Super E
CASE 580 K
CASE 580 Super K
CASE 580 L
CASE 580 Super L
Application Area:
Engine Cylinder Head
Valve Mechanism
Valve Train Assembly
Brand:
DCEC (Original Cummins)
J 900299 气门弹簧固定座（Valve Spring Retainer） 是一款用于 CASE 580 E、Super E、K、Super K、L 及 Super L 系列挖掘装载机 的 发动机气门机构关键零件，适用于搭载 Cummins 柴油发动机的机型。
该零件安装在 气门弹簧顶部位置，用于固定气门弹簧并保持气门在工作中的正确位置。它对确保 气门稳定开启与关闭、密封性能以及发动机整体运行效率 起着至关重要的作用，尤其在高温、高负荷工况下更为关键。
此产品由 东风康明斯（DCEC） 生产，符合 Original Cummins 原厂技术规格，在尺寸精度、材料强度及耐久性方面均达到发动机使用要求。常用于 气缸盖大修、气门系统维修或整机发动机翻修工程。
主要功能：
固定气门弹簧，防止移位
保持气门正确位置与弹簧预紧力
确保气门机构平稳可靠运作
对发动机燃烧效率与性能至关重要
适用机型：
CASE 580 E
CASE 580 Super E
CASE 580 K
CASE 580 Super K
CASE 580 L
CASE 580 Super L
应用位置：
发动机气缸盖
气门机构
气门传动系统
品牌：
DCEC（康明斯原厂）
