Hydraulic breaker operates too slowly
ByRemedyCause
Carrier driverCheck the engine speed and/or mode stage of the carrier
and the operation pressure and adjust
Insufficient hydraulic oil delivery volume
Carrier driverCheck the connecting fitting and tightenThe connecting fitting in the pressure and
tank line has come loose
Carrier driverCheck the check valve and openCheck valve in pressure and/or tank line
partly closed
Carrier driverCheck the oil filter and oil cooler, clean or renew themFlow resistance on oil filter or oil cooler too
high
Carrier driverCheck 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)
Gas pressure in piston accumulator too high
Carrier driverCorrect the direction of the carrier boom. The pressing force
must act in the axial direction of the hydraulic breaker.
Working tool jams in the lower breaker part
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)
WorkshopCheck the inside diameter and change if required
Observe the minimum inside diameter!
(see chapter Technical specifications)
Inside diameter of tank line too small
Atlas Copco Customer
Center/Dealer in your area
Check and lower the return pressureReturn pressure too high
Carrier driver or Atlas Copco
Customer Center/Dealer in
your area
Connect the hydraulic oil return circuit directly to the tank
or filter
Hydraulic oil return to the tank via a valve
section
WorkshopReplace the high-pressure accumulatorDiaphragm in high-pressure accumulator
defective
(Hose at port »P« is flailing about wildly)
Observe the national safety regulations!
Carrier driverCheck the oil level in the hydraulic tank and top up if requiredHydraulic oil temperature in the tank higher
than 80 °C
WorkshopCheck the pressure; adjust as required; Fit new type-tested
pressure relief cartridges where necessary
Hydraulic oil pressure too low
Impact force too low
ByRemedyCause
Carrier driverCheck the gas pressure and fill the piston accumulator
(see chapter Filling/topping up the piston accumulator)
Gas pressure too low
Checking:
Atlas Copco Customer
Center/Dealer in your area
Replacing:
by carrier manufacturer’s
customer service
Check the pump characteristic with a measuring device and
compare it to the original details; renew the pump if required
The pump of the hydraulic installation does
not deliver sufficient oil
Impact rate too high and impact force too low
ByRemedyCause
Carrier driverCheck the gas pressure and fill the piston accumulator
(see chapter Filling/topping up the piston accumulator)
No gas in piston accumulator
WorkshopReplace O-ringsO-rings defective
© 2012 Atlas Copco Construction Tools GmbH | No. 3390 5005 01 | 2012-05-03
Original instructions
60
HB 5800, 5800 DP, 7000, 7000 DP, 10000 DPTROUBLESHOOTING
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