The Loader Lift Control Valve Spool for CASE 580 L / Super L / L Series 2 is a precision-machined hydraulic valve component designed to regulate the oil flow for the loader lift function. It plays a critical role in ensuring smooth, responsive, and controlled lifting and lowering of the front loader arms.
Manufactured to OEM specifications, this spool is engineered for high-pressure hydraulic systems and heavy-duty working conditions commonly found in construction, excavation, and agricultural applications. The accurate tolerances help minimize internal leakage, prevent jerky movements, and maintain stable loader performance.
This control valve spool is ideal for replacing worn, scratched, or sticking spools that cause issues such as slow lift response, uneven movement, oil bypass, or loss of hydraulic efficiency. Suitable for professional repair, overhaul, or full hydraulic valve reconditioning.
Key Features:
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Precision-machined for exact hydraulic flow control
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Ensures smooth loader lift and lowering operation
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Reduces internal leakage and pressure loss
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High wear resistance for long service life
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Direct replacement for original loader lift valve spool
Application Area:
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Loader lift hydraulic control valve
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Front loader lifting system
Common Symptoms of a Faulty Loader Lift Control Valve Spool -
Loader arms lift slowly or inconsistently
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Loader jerks or shakes during lifting or lowering
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Loader does not lift even though the hydraulic pump is functioning
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Loader arms drop by themselves when control lever is in neutral
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Troubleshooting Guide
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Inspect the spool for wear, scoring, scratches, or corrosion
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Check for internal leakage caused by worn spool lands
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Ensure the spool moves freely inside the valve bore without binding
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Verify that hydraulic oil is clean and free from contamination
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Inspect valve body for damage before installing a new spool
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Replace damaged or worn spools to restore proper loader lift operation
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� Note: Continued operation with a worn spool may lead to further damage to the control valve body and reduced hydraulic system efficiency.
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Excessive hydraulic oil leakage or internal bypass
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Control lever feels stiff, sticky, or does not return smoothly
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Loss of hydraulic pressure under load
CASE 580 L / SUPER L / L Series 2 装载机提升控制阀阀芯 是一款高精度液压阀组件，主要用于控制装载机前臂提升与下降时的液压油流量，确保操作顺畅、反应灵敏及动作稳定。
该阀芯按照原厂规格加工，适用于高压力液压系统，能够承受建筑、工程及农业作业中的重负荷工况。精准的加工公差可有效减少内泄漏，防止提升时抖动、卡滞或无力等问题。
当原有阀芯因长期使用出现磨损、刮伤或卡死，导致装载机升降缓慢、动作不平稳或液压压力不足时，更换此阀芯可有效恢复液压系统的正常性能。适合专业维修、液压阀翻新及整修使用。
产品特点：
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高精度加工，液压控制准确
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提升与下降动作平稳顺畅
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减少内漏，提高液压效率
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耐磨性强，使用寿命长
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可直接替换原厂装载机提升阀阀芯
适用部位：
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装载机提升控制阀
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前装载臂液压系统
装载机提升控制阀阀芯常见故障症状
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装载臂提升 缓慢或不稳定
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提升或下降过程中出现 抖动、顿挫
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液压泵正常但装载机 无法提升
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操作杆处于中位时，装载臂 自动下沉
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排查与解决方法
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检查阀芯表面是否有 磨损、拉伤或腐蚀
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确认是否因阀芯磨损造成 内泄漏
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检查阀芯在阀体内 是否能顺畅滑动
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确保液压油 清洁无杂质
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安装新阀芯前检查阀体是否损坏
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更换磨损阀芯可有效恢复提升系统性能
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� 提示： 长时间使用磨损阀芯可能会损坏整个控制阀阀体，增加维修成本。
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液压系统 内泄漏严重
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操作手柄 卡滞、不顺畅
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负载时液压压力不足
