The Rear Bucket Control Valve Spool for CASE 580 M2, M3 and N Series is a precision-engineered hydraulic component designed to control hydraulic oil flow for the backhoe rear bucket function.
This spool ensures smooth and accurate bucket curl, dump, and holding operation under heavy working conditions. Manufactured to OEM standards, it is suitable for high-pressure hydraulic systems commonly used in construction and excavation applications.
Precision machining and tight tolerances help reduce internal leakage, maintain stable hydraulic pressure, and improve operator control. This spool is a direct replacement for worn or damaged original spools that cause poor bucket performance.
Key Features:
Precision-machined for accurate hydraulic control
Smooth and stable bucket curl & dump operation
Minimizes internal leakage and pressure loss
High wear resistance and long service life
Direct replacement for rear bucket control valve spool
Application:
Rear control valve assembly
Backhoe bucket hydraulic system
Common Symptoms:
Bucket movement is slow or weak
Bucket jerks during curl or dump
Bucket cannot hold position and drifts
Bucket drops when lever is in neutral
Loss of hydraulic pressure 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 for contamination
Replace worn spool to restore bucket 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 系列后部铲斗控制阀阀芯 是用于控制后挖掘铲斗动作的高精度液压阀组件，负责铲斗的收斗、放斗及保持动作。
该阀芯按照原厂规格制造，适用于高压液压系统，可确保铲斗动作平稳、有力及精准。高精度加工有效减少内泄漏，维持稳定液压压力，提升操作手感。
当原阀芯出现磨损、拉伤或内泄漏时，会导致铲斗无力、动作缓慢或自动下沉。更换此阀芯可恢复后部控制阀及铲斗系统的正常性能。
产品特点：
高精度加工，液压控制准确
铲斗收放动作顺畅稳定
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铲斗控制阀阀芯
适用位置：
后部控制阀总成
挖掘机铲斗液压系统
常见故障症状：
铲斗动作缓慢或无力
铲斗收放时抖动
铲斗无法保持位置
操作杆中位时铲斗自动下沉
负载时液压压力不足
排查方法：
检查阀芯是否磨损或刮伤
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
