How to Prevent the Most Common Hydraulic Failures

At Bailey, we want to keep you moving forward, always. So, we’ve decided to highlight the most common hydraulic failures, and more importantly, how to prevent them through smart maintenance and component selection.

1. Fluid Contamination

The Problem:

Contaminants like dirt, metal particles, and water are the leading causes of hydraulic system failures. They accelerate wear, clog components, and reduce efficiency.

Prevention:

Implement strict filtration practices. Use high-quality filters and replace them on schedule. Store fluid properly, use clean transfer equipment, and regularly test fluid cleanliness. Sealed reservoirs and desiccant breathers can further reduce contamination risk.

2. Overheating

The Problem:

Excessive heat degrades hydraulic fluid, damages seals, and reduces system efficiency.

Prevention:

Maintain proper fluid levels and ensure cooling systems (heat exchangers, fans) are functioning correctly. Use the right viscosity fluid for your operating environment, and monitor system temperature regularly to catch issues early.

3. Improper Fluid Selection

The Problem:

Using the wrong hydraulic fluid can lead to poor lubrication, increased wear, and system inefficiency.

Prevention:

Always follow manufacturer recommendations for fluid type and viscosity. Consider operating temperature ranges and load conditions when selecting fluid. Periodic fluid analysis helps confirm performance and identify degradation.

4. Air Entrapment and Aeration

The Problem:

Air in the system causes erratic operation, noise, and increased oxidation of fluid.

Prevention:

Check for loose fittings, cracked hoses, and low fluid levels. Ensure proper reservoir design and return line placement to minimize turbulence. Bleed the system after maintenance to remove trapped air.

5. Seal Failure

The Problem:

Worn or damaged seals lead to leaks, contamination, and loss of pressure.

Prevention:

Inspect seals regularly for wear, hardening, or cracking. Use seals compatible with your hydraulic fluid and operating conditions. Avoid excessive heat and pressure spikes that can shorten seal life.

6. Hose and Fitting Failures

The Problem:

Hoses can crack, burst, or loosen over time, leading to leaks or sudden system failure.

Prevention:

Perform routine visual inspections for abrasion, bulging, or leaks. Make sure hoses are properly routed and secured to prevent rubbing or kinking. Replace hoses based on service life, not just visible damage.

7. Pump Failure

The Problem:

Hydraulic pumps can fail due to cavitation, contamination, or excessive wear.

Prevention:

Maintain proper inlet conditions to prevent cavitation. Check for adequate fluid supply and avoid restrictions. Keep fluid clean and monitor for unusual noise or vibration. Regularly check alignment and operating pressures.

8. Cylinder Drift or Leakage

The Problem:

Internal leakage in cylinders can cause drift, reducing precision and efficiency.

Prevention:

Check cylinder seals and rods for wear or scoring. Maintain clean fluid to prevent internal damage. Rebuild or replace cylinders showing signs of internal bypassing before failure worsens.

9. Valve Malfunction

The Problem:

Sticking or worn valves can disrupt flow control, leading to erratic system behavior.

Prevention:

Keep fluid clean and free of varnish buildup. Exercise valves periodically to prevent sticking. Inspect for wear and replace components as needed to maintain precise control.

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Hydraulic failures don’t have to be inevitable. With the right components, proper system design, and a proactive maintenance strategy, you can significantly extend equipment life and reduce downtime.

At Bailey, we’re committed to delivering hydraulic solutions that keep your equipment and your business moving forward. Reach out to us today for a free consultation.