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Why Maintain Hydraulic Motors & Valves – How to Extend Their Service Life
2026-04-27 17:50
Practical Maintenance Guide to Increase the Service Life of Hydraulic Motors and Hydraulic Valves
1. Vlog Opening
2. Why Hydraulic Motors and Valves Need Regular Maintenance
2. Serious Consequences Without Regular Maintenance
2.1 Failure of Hydraulic Valves
- Directional control valve for hydraulic motor jams, slow reversing or failure to switch
- Serious internal leakage, system pressure cannot be established normally
- Pressure regulating failure of relief valve and flow control valve
- Oil leakage at the valve group interface, resulting in increased energy consumption
2.2 Performance Failure of Hydraulic Motors
- Unstable speed, reduced output torque and abnormal noise
- Severe wear of internal friction parts, shortened service life
- Oil seal aging and oil seepage, affecting equipment safety
- Overheating of the whole machine and reduced operating efficiency
2.3 Overall Hydraulic System Risks
3. Scientific Maintenance Methods for Motors & Hydraulic Valves
3.1 Daily Inspection (Daily Before Startup)
- Check the hydraulic oil level, oil color and oil quality, replace deteriorated oil in time
- Check all valve groups, motor shaft seals and pipeline joints for oil leakage
- Monitor operating sound, vibration and hydraulic oil temperature
- Clean surface dust and oil pollution to prevent external impurities from entering the oil circuit
3.2 Regular Routine Maintenance
- Replace hydraulic oil filter and return oil filter regularly to reduce oil pollution
- Fasten the fixing bolts of valve group and hydraulic motor to avoid loosening caused by vibration
- Regularly test the flexibility of the spool to prevent jamming
3.3 Medium-term Overhaul
- Replace hydraulic oil regularly according to working conditions
- Disassemble and clean the internal oil passage of directional valves, throttle valves and relief valves
- Re-calibrate system pressure to ensure matching parameters of valves and motors
- Inspect and replace aging sealing accessories
3.4 In-depth Major Maintenance
Completely disassemble the hydraulic motor, detect wearing parts, bearings and friction pairs;
Overhaul all control valves, replace fatigue springs and damaged valve cores;
Inspect aging pipelines and optimize the whole hydraulic circuit characteristic matching.
4. Universal Maintenance Cycle Standard Table
| Maintenance Type | Time Cycle | Working Hour Cycle | Core Maintenance Content |
|---|---|---|---|
| Daily Inspection | Every day | / | Oil quality check, leakage inspection, surface cleaning |
| Routine Maintenance | Every 6 Months | 500 Hours | Replace filter element, fasten parts, clean valve body |
| Medium Maintenance | Every 1 Year | 1000–1500 Hours | Replace hydraulic oil, clean valve group, pressure calibration |
| In-depth Maintenance | Every 2 Years | 2000 Hours | Disassemble motor & valves, replace wearing parts and seals |
Note: For dusty, high-temperature and heavy-duty working conditions, all maintenance cycles need to be shortened by 30%–50%.
5. Vlog Summary & Core Tips
Regular maintenance of hydraulic motors and hydraulic valves is the most cost-effective way to extend equipment life.
Standard daily inspection + periodic replacement of wearing parts + regular pressure calibration, can:
✅ Extend component service life by 2–3 times
✅ Reduce failure rate and maintenance cost
✅ Ensure stable operation of high-pressure hydraulic system matching
✅ Avoid safety accidents and production shutdown losses
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