Safety and operating instructions
© Construction Tools GmbH | 3390 5203 01 | 2019-08-06
Original Instructions
31
6 Operation
WARNING Components bursting
Components of the swivel joint may burst. Metal parts
may become projectiles and cause serious injuries and
damage property.
u Never operate the hydraulic breaker without attached
swivel joint covers.
WARNING Hot hydraulic oil squirting out
The hydraulic system is under high pressure. If hydraulic
connections come loose, hydraulic oil will squirt out un-
der high pressure. Hydraulic oil squirting out can lead to
serious injury.
u Immediately switch off the hydraulic attachment and
the carrier if you detect any leaks in the hydraulic cir-
cuits.
u Depressurise the hydraulic system (see chapter De-
pressurising the hydraulic system).
u Repair any leaks before operating the hydraulic at-
tachment again.
WARNING Hot parts
The percussion unit, the working tool, hoses, pipes and
fittings become very hot during operation. Touching
them may lead to burns.
u Never touch hot parts.
u If you have to carry out activities where you have to
touch the parts, wait for them to cool down first.
NOTICE Environmental damage due to hydraulic oil
Hydraulic oil is environmentally harmful and must not
penetrate the ground or enter the water table or water
supplies.
u Collect any hydraulic oil which escapes.
u Dispose of it in accordance with the applicable envi-
ronmental regulations.
NOTICE Hydraulic oil too hot
The temperature of the hydraulic oil must not exceed
80°C (176°F). Higher temperatures will damage the
seals of the hydraulic breaker and the diaphragm of the
HP-accumulator.
u The temperature of the hydraulic oil must be moni-
tored.
u Shut off the carrier and the hydraulic breaker if you
measure an increased temperature in the tank.
u Check the hydraulic installation and the pressure re-
lief valve.
NOTICE Damage due to idling strokes
If the percussion piston carries out a hammer action
without hitting the working tool, it is carrying out an idling
stroke. If this happens it will lead to hydraulic peak pres-
sures which may damage the seals of the hydraulic
breaker and the carrier.
u Do not allow the percussion piston to carry out idling
strokes for a prolonged period of time.
6.1 Initial operation and operation
after long storage
Prior to first use and after more than eight weeks storage
of the hydraulic breaker, the pressure in the piston accu-
mulator must be checked.
n
Remove the protective cap from the aperture for the
working tool.
n
Remove the retainer bars.
n
Check the pressure in the piston accumulator without
exerting pressure (see chapter Piston accumulator).
n
Fill up the piston accumulator or release the pressure
from the piston accumulator until the piston accumu-
lator has reached the minimum gas pressure (see
chapter Piston accumulator). Use the tabular value
at ambient temperature, not at operating temperature
in this case.
n
Install the hydraulic breaker (see chapter Installa-
tion).
n
Operate the hydraulic breaker until the operating tem-
perature 60–70°C (140–158°F) has been
reached.
n
Follow all instructions as described in the chapter
Operation.
n
Check the pressure in the piston accumulator without
exerting pressure of the working tool (see chapter
Piston accumulator).
n
Fill up the piston accumulator to the required gas
pressure (see chapter Piston accumulator).
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