Hydraulic breaker operates too slowly
Cause Remedy By
Insufficient hydraulic oil delivery volume Check the engine speed and/or mode stage of the carrier
and the operation pressure and adjust
Carrier driver
The connecting fitting in the pressure and
tank line has come loose
Check the connecting fitting and tighten Carrier driver
Shut-off valve in pressure and/or tank line
partly closed
Check the shut-off valve and open Carrier driver
Flow resistance on oil filter or oil cooler
too high
Check the oil filter and oil cooler, clean or renew them Carrier driver
Gas pressure in piston accumulator too
high
Check the gas pressure in the piston accumulator and
release some gas if required
(see chapter
Checking the pressure in the piston accumulator and
Release the pressure from the piston accumulator)
Carrier driver
Working tool jams in the lower breaker
part
Correct the direction of the carrier boom. The pressing
force must act in the axial direction of the hydraulic
breaker.
Check the shaft of the working tool and deburr if required.
Check the working tool and the wear bush for wear and
replace if required
(see chapter
Checking the working tool and
Checking the wear bushes and impact ring)
Carrier driver
Inside diameter of tank line too small Check the inside diameter and change if required
Observe the minimum inside diameter!
(see chapter Technical specifications)
Workshop
Return pressure too high Check and lower the return pressure Atlas Copco Customer
Center/Dealer in your area
Hydraulic oil return to the tank via a valve
section
Connect the hydraulic oil return circuit directly to the tank
or filter
Carrier driver or Atlas Copco
Customer Center/Dealer in
your area
Diaphragm in high-pressure accumulator
defective
(Hose at port »P« is flailing about wildly)
Replace the high-pressure accumulator
Observe the national safety regulations!
Workshop
Hydraulic oil temperature in the tank
higher than 80 °C
Check the oil level in the hydraulic tank and top up if
required
Carrier driver
Hydraulic oil pressure too low Check the pressure; adjust as required; Fit new type-
tested pressure relief cartridges where necessary
Workshop
Impact force too low
Cause Remedy By
Gas pressure too low Check the gas pressure and fill the piston accumulator
(see chapter Filling/topping up the piston accumulator)
Carrier driver
The pump of the hydraulic installation
does not deliver sufficient oil
Check the pump characteristic with a measuring device
and compare it to the original details; renew the pump if
required
Checking:
Atlas Copco Customer
Center/Dealer in your area
Replacing:
by carrier manufacturer’s
customer service
HB 2000, 2000 DP, 2500, 2500 DP Safety and operating instructions
© Construction Tools GmbH | 3390 5090 01 | 2016-05-23
Original instructions
59
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