The Rear Dipper Control Valve Spool for CASE 580 M2, M3 and N Series is a precision-machined hydraulic component designed to control hydraulic oil flow for the backhoe dipper (arm in / arm out) function at the rear control valve.
This spool ensures smooth, accurate, and responsive dipper movement under heavy-duty working conditions. Manufactured to OEM standards, it is suitable for high-pressure hydraulic systems used in construction and excavation operations.
Precision machining and correct tolerances help minimize internal leakage, maintain consistent hydraulic pressure, and improve overall machine control. This spool is a direct replacement for worn or damaged original spools that cause poor dipper performance.
Key Features:
Precision-machined for accurate dipper control
Smooth and stable dipper in / out operation
Minimizes internal leakage and pressure loss
High wear resistance and long service life
Direct replacement for rear dipper control valve spool
Application:
Rear control valve assembly
Backhoe dipper hydraulic system
Common Symptoms:
Dipper movement is slow or weak
Dipper jerks during extension or retraction
Dipper cannot hold position
Dipper drifts when control lever is in neutral
Loss of hydraulic power under load
Control lever feels tight or sticking
Troubleshooting:
Inspect spool surface for wear or scoring
Check for internal oil bypass
Ensure spool moves smoothly inside valve bore
Check hydraulic oil condition and cleanliness
Replace worn spool to restore dipper performance
CASE 580 M SERIES 2
CASE 580 SUPER M SERIES 2
CASE 580 M SERIES 3
CASE 580 SUPER M SERIES 3
CASE 580 N
CASE 580 SUPER N
CASE 580 M2 / M3 / N 系列后部控制阀斗杆（Dipper）阀芯 是用于控制挖掘臂斗杆前后伸缩动作的高精度液压阀组件。
该阀芯负责斗杆的伸出与收回动作，确保操作平稳、反应灵敏并具备足够的液压力量。产品按照原厂规格制造，适用于高压液压系统，广泛用于工程与挖掘作业。
高精度加工可有效减少内泄漏，维持稳定液压压力，并提升整机操控性能。当原阀芯磨损或损坏时，更换该阀芯可恢复斗杆系统的正常工作状态。
产品特点：
高精度加工，斗杆控制准确
斗杆前后动作顺畅稳定
有效减少内泄漏
耐磨耐用，使用寿命长
可直接替换原厂后部斗杆控制阀阀芯
适用位置：
后部控制阀总成
挖掘机斗杆液压系统
常见故障症状：
斗杆动作缓慢或无力
斗杆伸缩时抖动
斗杆无法保持位置
操作杆中位时斗杆自动移动
负载时液压压力不足
排查方法：
检查阀芯是否磨损或拉伤
确认是否存在内泄漏
确保阀芯在阀体内滑动顺畅
检查液压油是否清洁
更换磨损阀芯以恢复性能
