Safety and operating instructions
58 © Construction Tools GmbH | 3390 5203 01 | 2019-08-06
Original Instructions
Cause Remedy By
pressure in the piston accumulator
and Release the pressure from the
piston accumulator)
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 mini-
mum inside diameter! (see chapter
Technical specifications)
Workshop
Return pressure too high Check and lower the return pressure Epiroc 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 Epiroc Customer
Center / Dealer in your area
Diaphragm in high-pressure accumula-
tor defective (Hose at port »P« is flail-
ing about wildly)
Replace the high-pressure accumula-
tor
Observe the national safety regula-
tions!
Workshop
Hydraulic oil temperature in the tank
higher than 80°C (176°F)
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 re-
quired; Fit new type-tested pressure
relief cartridges where necessary
Workshop
8.3 Impact force too low
Cause Remedy By
Gas pressure too low Check the gas pressure and fill the
piston accumulator (see chapter Fill-
ing / topping up the piston accu-
mulator)
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: Epiroc Customer Center /
Dealer in your area
Replacing: by carrier manufacturer’s
customer service
8.4 Impact rate too high and impact force too low
Cause Remedy By
No gas in piston accumulator Check the gas pressure and fill the
piston accumulator (see chapter Fill-
ing/topping up the piston accumu-
lator)
Carrier driver
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