Hydraulic Breaker Oil Leakage: Causes and Solutions for Optimal Performance

Hydraulic breakers operate on liquid static pressure, driving pistons for reciprocating motion. During the piston stroke, high-speed impacts on the rod can lead to oil leakage, a common occurrence in hydraulic breaker systems. The reasons for this phenomenon typically fall into two main categories: normal seal conditions and abnormal seal conditions. Let's delve into the detailed insights provided by hydraulic breaker manufacturers:

Normal Seal Conditions:

1. Oil leakage at low pressure but not at high pressure due to poor assembly surface roughness.

   • Solution: Improve surface roughness to 3.2~6.3umry and use softer seals.

2. Enlarged oil ring on the piston rod causing minor oil dripping with each stroke.

   • Solution: Replace the dust seal with a different type to prevent oil film scraping.

3. Oil leakage at low temperatures but not at high temperatures.

   • Solution: Address eccentricity issues or select seals suitable for cold temperatures.

Hydraulic breaker middle cylinder block

Abnormal Seal Conditions:

1. Hardened main oil seal surface with cracks on the sliding area.

   • Cause: Abnormally high working pressure and speed.

2. Hardened main oil seal surface leading to complete seal rupture.

   • Cause: Deteriorated hydraulic oil causing excessive temperatures and ozone damage to the seals.

3. Mirror-like smooth wear on the main oil seal surface.

   • Cause: Excessive pressure during micro-movements.

4. Uneven mirror-like wear on the main oil seal surface causing swelling.

   • Cause: Excessive side pressure or eccentricity, improper oil or cleaning agent usage.

5. Damages and scratches on the sliding area of the main oil seal.

   • Cause: Poor plating, rough mating surfaces, improper piston rod material with impurities.

6. Cracks at the top of the lip of the main oil seal.

   • Cause: Improper chamfering during assembly, inadequate installation or storage methods.

7. Pressure marks on the sliding area of the main oil seal.

   • Cause: Presence of foreign particles.

8. Cracks and fissures at the lip of the main oil seal.

   • Cause: Improper oil usage, extreme working temperatures, high back pressure, excessive speed, or pulsating pressures.

9. Carbonization and deterioration of the main oil seal.

   • Cause: Air entrapment leading to adiabatic compression.

10. Extrusion cracks at the bottom of the main oil seal.

    • Cause: Excessive pressure, large extrusion clearances, improper support ring use, or flawed installation groove design.

These detailed insights provide guidance on addressing hydraulic breaker oil leakage issues. We appreciate the comprehensive information shared by the hydraulic breaker manufacturers, and for more engaging content, stay tuned to our platform.