When Does Your Hammer Need Repair?

Leaking Hydraulic Fluid is the Most Common Symptom that your Hammer Need Repair


Hydraulic fluid running down the tool bit is an obvious indicator that your hammer has a problem and is usually a strong indicator of failed piston seals.


Some other parts that may need replacement during a hammer overhaul:


Reseal – A hydraulic hammer rebuild always involves replacing all of the seals.


Diaphragm – This critical component of the accumulator mechanism and contains high-pressure nitrogen gas within the hammer. Leaks or rupture of the diaphragm will not allow the hammer to operate


Lower tool bushing – The most commonly replaced part in a hammer is the lower tool bushing. When hammering at an angle, and not perpendicular to the surface, the tool bit wears against the tool bushing. Improper tool grease maintenance will increase tool bushing wear. When the bushing becomes too worn and loose a cascade affect occurs – the tool bit slides slightly crooked in the hammer, the piston strikes the tool bit at an angle, which causes warping and fractures in the piston striking surface.


Tie rods – Tie rods, which hold the hammer together, fatigue over time and lose strength. Most manufacturers set limits on the reuse times of tie rods. Tie rods should be replaced in diagonal pairs across the hammer.


Piston – Damaged, cracked or worn pistons are not as common as other parts requiring repair. Sometimes, we can repair imperfections in a piston by polishing the cylinder. Some pistons are  deeply scored or broken, requiring replacement.


Tool bit – Tool bits that are hammered until they become very short will transfer heat faster into the hammer than longer tool bits. Excessive heat build-up can cause premature wear of parts inside the hammer and, eventually, contribute to a hammer’s failure.

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