Atlas Copco Hydraulic Breaker HB4700

Warning: This procedure should be performed by trained personnel only.

Enter the current gas pressure in the piston accumulator

Is the gas pressure equal to or less than the minimum gas pressure?

If the gas pressure is less than the minimum, proceed to top up the piston accumulator.

Is the hydraulic breaker at operating temperature (60-70 °C)?

Lay down the hydraulic breaker.

Do not apply pressure to the working tool.

Remove the threaded plug from the filling valve 'G'.

Push the hose end of the test pressure gauge into the filling valve and note the pressure.

Check that the pipe clamps on the carrier are tight

Check the screw connections of the swivel joint covers and tighten as required

Replace damaged swivel joint covers

Warning: Chisel paste is environmentally harmful and must not penetrate the ground or enter the water table or water supplies.

Dispose of chisel paste polluted by dust and of cloths with chisel paste in accordance with the applicable regulations to avoid environmental hazards.

Regular cleaning and greasing of the installed parts and their holders safeguards their operation and improves the availability of the hydraulic breaker.

Can the floating ring move freely?

If the floating ring is stuck, remove the floating ring, counter ring and guide ring.

Is the space in front of the flexible wiper clean of all loose dust?

If the wiper is damaged, replace it.

Warning: This check requires trained personnel with PPE!

Enter the machine's hour meter reading

Upload a photo of the dismantled working tool

Is the percussion piston impact surface chipped?

Are there any visible cracks on the percussion piston impact surface?

If the surface is chipped or cracked, do not use the hydraulic breaker again.

Enter the name and contact of the Atlas Copco Customer Center/ Dealer in your area

Sign off on the percussion piston impact surface check

WARNING: Hot working tool. The tip of the working tool gets very hot during operation. Touching it may lead to burns. Never touch the hot working tool. If you have to carry out any activities, wait for the working tool to cool down first.

Remove the working tool (see the chapter Dismantling the working tool)

Check the impact surface of the working tool for chips and cracks

Check the impact surface of the working tool for deformation

Replace the working tool if you detect chips, cracks or deformations (B and C)

Check the wear condition of the impact ring if you detect deformations (B). Replace impact ring if necessary

Check the shaft of the working tool for wear whenever replacing it, but at least once every 100 operating hours

Replace the working tool if the shaft has worn to the minimum diameter Dmin