Hydraulic Breaker, also known as a percussion hammer, is a heavy mechanical device used to demolish concrete, asphalt, or stone materials. Hydraulic breakers are commonly seen in road construction and are preferred due to their high performance. Most mini excavators can be installed differently Hydraulic Breakers.

This article is about the installation and removal of Hydraulic Breaker for Mini Excavator.

Fundamental circuit

When piping the hydraulic lines on-base machine, it is important to know the fundamental circuit to which the piping belongs. Then the piping can be connected correctly, properly and quickly

This Image is shown one of the simplest hydraulic circuits in the case of the installation of a service port into the main control valve of the base machine.

Tips: If the piping method is different from the Image, consult us or attachment manufacturer.

Read More: The working principle of excavator attachments

General view

Check the piping lines for the correctness of such as pressure, flows or pressure loss, if the hydraulic pipe once are installed in the base machine.

A pressure control valve has to be installed if there is no pressure control valve on the main control valve of the base machine.

The standard view of the installation

Installation of Hydraulic Breaker

  • Set the hydraulic breaker on horizontal ground.
  • Remove the bucket from the base machine after disassembling the two pins
  • Move the base machine in the vicinity of the hydraulic breaker, align the pinhole of the arm with the pinhole of the hydraulic breaker, and then, insert the pins.
  • After the arm pin is inserted, lift the boom, and insert the hydraulic breaker on the wood blocks like 4-3-3. Extend the bucket cylinder, fit it to the bucket link’s hole and insert the pins.
  • Install the stop rings, align the bolt holes and insert the bolts, mutually lock the double nut.
  • Stop the engine of the base machine, turn off the main switch and discharge the air pressure in the hydraulic oil tank.
  • Remove the union caps from the hydraulic breaker pipe of the arm end, and connect the hoses after disassembling the hose plug
  • Connect the hoses to the stop valve at both sides of the arm.
  • Turn on the engine of the base machine, left the boom, operate the bucket cylinder and check the hose of hydraulic breaker is connected correctly.
  • Starts warming up the base machine.
  • Turn the stop valves to the “ON” position
ModelHose Diameter (inch)Length (mm)Working Pressure (bar)
45/53/68/75 1/21450140
85/100 3/41850170


  • Be careful so that dust may not enter the hydraulic breaker and base machine.
  • Install or remove the hydraulic breaker on the horizontal ground without mud or dust.
  • If the bucket cylinder is retracted, the installation will be easier.
  • If the stop rings are secured with one nut only, the service life of the bolt may be shortened or the bolt may be loosened out very quickly
  • Do not allow the oil to drop onto the ground.
  • Store the removed union cap and hose plug in the toolbox.
  • When installing or removing the oil hose and union cap, clean them fully to prevent the dust and mud from entering the hydraulic breaker of the base machine.
  • Warm up the base machine by idling for 5 minutes after starting the engine.
  • Move the boom and arm for approx. 5 minutes after warm-up operation to raise the hydraulic oil temperature of the base machine.

Removal of Hydraulic Breaker

  • Set the hydraulic breaker on clean and horizontal ground. Lock the packing brake of base machine.
  • Stop the engine.
  • Turn stop valve to “OFF” position.
  • Disconnect hoses from stop valves. Ensure no leakage occurs from hoses and stop valves.
  • Apply union cap and plug to hose ends fittings to prevent contamination.
  • Remove pins fixing fasteners.
  • Remove pins.
  • When pins have been withdrawn, move operating joystick slightly, to take the weight off remaining link pin.
  • Lift arm away from hydraulic breaker so that hydraulic breaker can be carried away, or another attachment mounted on-base machine.


  • Cover the hydraulic breaker already removed with sheet, and then store it indoors.
  • Personal injury can result from dropping pins during removal.
  • Wear safety shoes to protect feet.

JIANGTU Attachments, as a breaker manufacturer for 12 years. We could provide various types of hydraulic hammer breakers and the chisel selection recommendation and installation instructions for you. If you have any questions, please feel free to contact us.

JIANGTU Excavator Break adopts special carbon steel material and heat treatment processes to ensure that the wear of the piston hitting surface is minimized and the service life of the piston is maximized.

Piston production adopts precise tolerance control to ensure that the piston and cylinder can be replaced with a single product, reducing maintenance costs.

The shell of the breaker has put forward higher and higher requirements for its sealing system. The NOK brand oil seals ensure our hydraulic breaker has low (zero) leakage, low friction and wear, and long service life.

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