Troubleshooting for hydraulic cylinders used in plows
Hydraulic cylinders for plows
Hebei Runhe Hydraulic Machinery Co., Ltd. has dedicated twelve years to the hydraulic field. Leveraging a professional R&D team and advanced production processes, we provide reliable hydraulic cylinders for plows to various agricultural machinery. This article offers specialized solutions for common valve core sticking and cavitation issues encountered during the operation of plow hydraulic cylinders.
1. Solutions for Stuck Spool and Clogged Valve Bores
(1) Identifying Fault Symptoms
When plow hydraulic cylinders exhibit sluggish operation, misoperation, or complete failure, it is likely caused by a stuck spool in the flow control valve or directional valve, or by clogged valve bores. These faults directly impact tillage efficiency and can even cause work interruptions in severe cases.
(2) Systematic Troubleshooting Process
First, inspect hydraulic fluid contamination. Take a sample to observe color, viscosity, and impurity levels. Normal hydraulic fluid should be clear and transparent with no suspended particles. Cloudy fluid or metal particles indicate system wear or contamination.
Next, examine valve bodies for debris or gummy deposits. Disassemble valve assemblies to inspect spool surfaces for scratches or burrs, and check bore walls for smoothness. Thoroughly clean all components using a specialized cleaning agent to ensure unobstructed flow paths.
(3) Professional Remediation Measures
For minor sticking, attempt repeated valve spool operation to flush contaminants with hydraulic fluid. Severe sticking requires disassembling the entire valve assembly for deep cleaning. Replace all system filters, including suction, pressure, and return line filters. Thoroughly clean the hydraulic reservoir to remove sediment from the bottom.
When valve body wear exceeds permissible limits, immediately replace damaged components. It is recommended to simultaneously replace all hydraulic oil, ensuring the new oil meets a cleanliness standard of NAS 8 or higher. After reassembly, perform a system circulation flush until oil cleanliness meets specifications.
2. Prevention and Treatment of Cavitation Issues
(1) Cavitation Formation Mechanism
Cavitation is one of the common failures in hydraulic cylinders, primarily caused by the rupture of bubbles in the hydraulic fluid. When the fluid exhibits poor anti-foaming properties, bubbles are easily generated. Simultaneously, rapid changes in hydraulic pressure accelerate the formation and rupture of bubbles, particularly in areas with frequent pressure fluctuations such as the inlet and return ports of hydraulic cylinders.
(2) Comprehensive Preventive Measures
Selecting high-quality, anti-foaming hydraulic oil is crucial for preventing cavitation. Choose hydraulic oil with excellent anti-emulsification and anti-foaming properties, and regularly monitor oil quality. Maintain oil temperature within normal ranges, avoiding overheating—typically controlling it between 30-60°C (86-140°F). Optimize hydraulic system design to reduce pressure fluctuation frequency. Install buffer devices at cylinder inlet and return ports to mitigate pressure shocks. Ensure system integrity to prevent air ingress. Regularly inspect pump and valve components to maintain stable system operation.
Hebei Runhe Hydraulic Machinery Co., Ltd. manufactures hydraulic cylinders for plows using specialized materials and processes that significantly enhance cavitation resistance. Through optimized structural design and precision manufacturing techniques, we ensure product reliability under harsh operating conditions.
Choosing our products means choosing reliability and expertise. We are committed to providing enduring power support for your agricultural mechanization operations with superior products and comprehensive services.
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