WHY THE HYDRAULIC BREAKER DOES NOT STRIKE OR STRIKES SLOWLY?

Why is my hydraulic breaker not working?

The hydraulic breaker operates by using the hydraulic system to drive the piston back and forth. The strikes generated by this movement ensure smooth operation. However, if your hydraulic breaker fails to strike, strikes intermittently, or has a low strike frequency and weak impact, there could be several reasons.

Insufficient high-pressure oil flow:

Cause: The pipeline might be blocked or damaged, or there may not be enough hydraulic oil.

Solution: Inspect and repair the pipeline; check the oil supply system.

Sufficient high-pressure oil, but the breaker does not strike:

Causes:

  • Incorrect connection of the inlet and return pipes
  • Working pressure lower than specified
  • Stuck reversing spool
  • Stuck piston
  • Excessive nitrogen pressure in the accumulator or nitrogen chamber
  • Closed stop valve
  • Oil temperature exceeding 80 degrees

Solutions:

  1. Correct the connections
  2. Adjust the system pressure
  3. Clean and repair the valve core
  4. Check piston mobility by hand; replace the guide sleeve or piston if necessary
  5. Adjust nitrogen pressure in the accumulator or nitrogen chamber
  6. Open the shut-off valve
  7. Check the cooling system and lower the oil temperature to working levels

Piston moves but does not strike:

Cause: The hydraulic rock breaker chisel might be stuck.

Solution: Remove the drill rod and inspect for damage to the drill rod pin or chisel. Check for a broken piston in the inner jacket or any obstruction, and clean it up if needed.

How long should you use a hydraulic breaker for?

Hydraulic breakers are critical tools in excavation and demolition. Like all attachments for skid steers or excavators, operators need to follow specific guidelines when using hydraulic breakers, also known as hydraulic hammers, holerams, or rock hammers. Here are some key do’s and don’ts to maximize the performance and lifespan of your hydraulic breaker attachments.

Do’s

  • Ensure flow testing for your equipment: Each hydraulic breaker company specifies the required gallons per minute, working pressure, backpressure, and relief. If your carrier does not supply oil within these specifications, your warranty may be voided, and the breaker may not perform optimally.
  • Perform daily visual inspections: Hydraulic breakers and attachments endure significant stress, vibration, and recoil. Operators should inspect for grease on the lower bushing, loose fasteners, and leaking hoses daily.
  • Grease every two hours: Regular greasing keeps out dust, reduces heat at contact points, and prevents premature wear on tool bushings. Insufficient lubrication can cause galling on the shank of the demolition tool and damage to the tool retainer.

Don’ts

  • Avoid cycling your breaker longer than 20 seconds: Reposition the tool every 15 to 30 seconds, especially if it’s not moving steadily through the material. Keep the breaker as perpendicular as possible and apply steady downward pressure to reduce recoil.
  • Don’t start breaking large pieces in the middle: This approach increases the breakout force required, stressing the breaker and overheating the tool. Start near the edges to provide a break towards an area, enhancing production and reducing stress on the breaker.
  • Never blank fire your hydraulic breaker: Blank firing, when the hammer cycles without being firmly planted against material, causes stress on the tool, tool retainers, tool holder/chuck housing, and tie rods/side bolts. Avoid firing the breaker in midair and release the trigger before the tool is completely through the material.
  • Do not use your hydraulic breaker in water: Using hydraulic hammers underwater without an air compressor as per manufacturer guidelines can lead to catastrophic failure.Encourage operators to report safety or performance issues immediately. Addressing problems early is cost-effective and helps protect your hydraulic hammer.

Contact A&D

If you need a new or remanufactured hydraulic breaker, wear parts, demolition tools, or accessories, A&D can assist you. We offer a variety of hydraulic breaker attachments to meet your needs. Call us today at +86 151 6684 1341 to learn more about available attachments and pricing.

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