580M2 REAR CONTROL VALVE SPOOL - DIPPER

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

Compatible Models

• 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