Safety and operating instructions
12 © Construction Tools GmbH | 33905146 01 | 2019-09-05
Original Instructions
2.8 Hydraulic installation,
precautions
WARNING Hydraulic pressure too high
If the hydraulic pressure is too high, the parts of the hy-
draulic attachment will be exposed to excessively high
loads. Parts can break loose or burst causing serious in-
juries.
u Lay the drain line of the pressure relief valve directly
in the tank to ensure the safe functioning of the pres-
sure relief valve!
u The pressure relief valve must be set at the maxi-
mum static pressure.
u The pressure relief valve setting must be checked to
ensure that the maximum static pressure (see chap-
ter Technical specifications) of the hydraulic instal-
lation is not exceeded at any time. Attach a lead seal
to the pressure relief valve.
u Prior to their first use, the safety facilities on the hy-
draulic installation must be checked by a profes-
sional/authorised monitoring body for their quality
(CE mark etc.), suitability and proper functioning.
u If any significant changes are made to the hydraulic
installation, a new acceptance inspection is to be
carried out in accordance with the relevant national
safety provisions.
WARNING Hot hydraulic oil squirting out
The hydraulic system is under high pressure. Hydraulic
lines may spring a leak or burst. Hydraulic oil squirting
out can lead to serious injury.
u When attaching the hydraulic attachment do not lay
any hydraulic lines through the carrier's cab.
u Only use hydraulic lines which comply with the fol-
lowing quality requirements:
- Hydraulic hoses with 4 reinforcement steel wires
according to DINEN856 4SH,
- Hydraulic pipes, seamless cold-drawn steel pipes
according to DINEN10305
2.9 Special parts, precautions
2.9.1 HP-accumulator
DANGER Danger of explosions
The HP-accumulator of the hydraulic breaker is filled
with nitrogen (N
2
). Filling it with any other gas may trig-
ger an explosion and lead to serious, possibly fatal, in-
juries.
u Only fill the HP-accumulator with nitrogen (N
2
).
u Do not carry out any welding and soldering work to
the HP-accumulator.
u Check the HP-accumulator in accordance with the
national safety provisions.
WARNING Component coming loose abruptly
Risk of bursting
The HP-accumulator is under pressure, even when the
hydraulic system has been depressurised. Screw con-
nections might come loose unexpectedly and cause in-
juries.
u Never unscrew the cover or the upper shell from a
pressurised HP-accumulator.
u Never carry out mechanical processing to the HP-ac-
cumulator.
2.9.2 Piston accumulator
DANGER Danger of explosions
The integrated piston accumulator is filled with nitrogen
(N
2
). Filling it with any other gas may trigger an explo-
sion and lead to serious, possibly fatal, injuries.
u Only fill the piston accumulator with nitrogen(N
2
).
WARNING Component coming loose abruptly
The piston accumulator is under pressure, even when
the hydraulic system has been depressurised. The filling
valve might come loose unexpectedly and cause in-
juries.
u Never unscrew the filling valve »G« from the pres-
surised piston accumulator.
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