What are the key points to note in the maintenance and care of hydraulic equipment?

Key Points for Maintenance of Hydraulic Equipment

1. Control Oil Contamination & Maintain Cleanliness

• Ensuring hydraulic oil purity is critical for system reliability. Severe contamination is a leading cause of hydraulic failures (e.g., 80% of failures in a major factory were traced to polluted oil). Contaminated oil also accelerates component wear.
  2. Monitor Oil Temperature Rise
• Excessive temperature fluctuations in machine tools lead to:
  Reduced pump suction capacity & volumetric efficiency.
  b. Unstable pressure/speed and unreliable operations.
  c. Increased internal/external leakage.
  d. Accelerated oil oxidation.
  3. Prevent System Leakage & Air Ingestion
• Common failures include leaks and air entrainment. Countermeasures:
  • Improve machining/assembly precision of components and piping.
  • Use high-quality seals and enforce scheduled replacement.
  • Prioritize routine inspections.

4. Suppress Vibration & Noise

• Vibration loosens fasteners and pipe joints, causing leaks or pipe bursts. Severe cases may lead to safety incidents. Proactive mitigation is essential.
  5. Implement Daily & Periodic Inspections
• Hydraulic failures are oftenhidden, variable, and hard to diagnose. Structured inspections with maintenance logs help preempt major breakdowns and provide troubleshooting data.
  6. Enforce Scheduled Maintenance
• Regular tightening, cleaning, filtering, and replacement are mandatory due to vibration-induced loosening, wear, and contamination. Cover:
  • Hydraulic components/tank cleaning.
  • Oil and seal replacements.

7. Adhere to Process Discipline

• In automated high-volume production, operators must NOT arbitrarily increase system pressure/speed to accelerate cycles. Such practices raise power consumption, oil temperature, and failure risks.
  8. Maintain Equipment Technical Archives
• Detailed records supportfault analysis, spare parts management, and repairs. Archives are foundational for evidence-based decision-making.
  9. Establish Hydraulic Component Test Labs
• A dedicated facility ensures:
  • Repaired/in-stock components meet OEM specs.
  • Performance validation before reverse-engineering imports.

Four Common Hydraulic "Diseases"

• "Psychosis": Erratic operation (intermittent actions).
• "Cold Sweat": Severe leakage.
• "Tremors": Jerky/crawlingactuator movement.
• "High Fever": Abnormal oil temperature rise.

Conclusion: Scientific management, proactive diagnostics, and preventive measures can minimize or eliminate these issues.