Hydraulic Breaker Oil Leakage: Causes, Solutions, and Professional Support

The hydraulic breaker, as a key attachment for excavators, delivers powerful impact through hydraulic pressure and piston movement. It is widely used in mining, roadwork, and concrete demolition. However, one of the most common technical challenges faced by operators is oil leakage. If ignored, it affects performance, reduces efficiency, and can even cause severe equipment damage. Understanding the causes and taking proper action is essential for safe and productive operations.

1. Oil leakage at low pressure but normal at high pressure
This issue often points to assembly surface roughness not meeting standard requirements. A surface that is too rough will weaken the seal and cause oil seepage under low pressure. At higher pressure, seals expand temporarily, masking the defect.
Solution: Improve surface roughness to between 3.2–6.3 μm and select sealing components with slightly lower hardness, ensuring stronger adaptability and tighter sealing.

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2. Oil leakage at low temperature but normal at high temperature
Operators sometimes find that the breaker leaks oil in cold weather, but works properly in warmer conditions. This is usually caused by excessive eccentricity in the structure or incorrect seal material choice. At low temperature, seals shrink or harden, losing elasticity.
Solution: Adjust the design to reduce eccentric load and choose sealing materials optimized for low‑temperature environments, so they maintain elasticity and reliable sealing across different climates.

3. Piston rod dripping oil after each stroke
When the piston rod oil ring enlarges and drops oil after every movement, the dust seal is usually the root problem. Poor lip design scrapes away the oil film from the rod, leading to leakage.
Solution: Replace the dust seal with a type that retains the lubricant film while effectively blocking dust. This ensures both proper lubrication and leak prevention.

Professional service matters
Leakage in a hydraulic breaker must not be underestimated. It affects efficiency, increases maintenance cost, and threatens long‑term reliability. A trusted hydraulic breaker manufacturer brings proven experience and technical capability to handle these issues. Fast diagnosis, precision parts, and expert after‑sales support are critical for contractors who rely on equipment every day.

Whether you operate a small hammer for backhoe or a heavy breaker for mining, proactive inspection and professional help are the most effective ways to eliminate oil leakage. With the right solution provider, your hydraulic breaker can continue delivering stable, cost‑effective, and safe performance in every project.