Safety and operating instructions
52 © Construction Tools GmbH | 3390 5201 01 | 2023-05-15
Original Instructions
8 Troubleshooting
8.1 The hydraulic breaker does not start
Cause Remedy By
Pressure and tank lines swapped Check the laying of the pressure and tank lines and con-
nect correctly (see chapter Making the hydraulic con-
nections )
Carrier driver
Shut-off valve in pressure and/or
tank line closed
Check the shut-off valve and open Carrier driver
Gas pressure in piston accumula-
tor too high
Check the gas pressure in the piston accumulator and ad-
just it to the correct value (see chapter Checking the
pressure in the piston accumulator and Release the
pressure from the piston accumulator)
Carrier driver
Oil level in tank too low Check the oil level and top up oil Carrier driver
Defective couplings blocking
pressure and tank lines
Check coupling and replace defective coupling halves Workshop
Faults in the electrical system of
the hydraulic breaker installation
Check the electrical system of the hydraulic breaker instal-
lation and clear faults
Workshop
Magnet on switch-on valve dam-
aged
Replace the magnet Workshop
Operating pressure too low Check the carrier engine speed, the pump delivery and
the pressure relief valve; check the operating pressure
Adjust settings and replace defective parts if required
Carrier driver or
Epiroc Customer
Center / Dealer in
your area
8.2 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 pres-
sure 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 accumula-
tor too high
Check the gas pressure in the piston accumulator and re-
lease 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
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