HP-accumulator
As safety−related components, high pressure
accumulators are subject to special safety
regulations.
Overhauling high pressure accumulators is only
permitted if carried out by professionals.
Professionals are people who are authorised to
overhaul high pressure accumulators according to
national regulations.
Contact the Atlas Copco Customer Center/Dealer
in your area for a professional.
A. Lower shell
B. Upper shell
C. Fastening screws
D. Connecting screws
WARNING Component coming loose
abruptly
The HP-accumulator is under pressure, even when
the hydraulic system has been depressurised.
Screw connections and parts of the HP-
accumulator might come loose abruptly and cause
injuries.
►
Never unscrew the cover or the upper shell
from a pressurised HP-accumulator.
►
Have the HP-accumulator checked in
accordance with the national / regional safety
provisions.
Visual check
Once a week carry out a visual check of the HP-
accumulator.
In case of damages, safe, trouble-free operation is
ensured only if the complete HP-accumulator is
replaced.
◆
Immediately replace the complete HP-
accumulator if you detect:
- cracks/fissures,
- distortion/deformation,
- corrosion,
- thread damage to the threaded bores.
◆
If broken or missing connecting screws are
detected the HP-accumulator shells needs to
be checked for cracks, deformations and
damage to the threaded bores by a
professional. All connecting screws must be
replaced.
◆
Never operate the hydraulic breaker if you
detect any damage to the HP-accumulator.
The HP-accumulator can be replaced on site.
Contact the Atlas Copco Customer Center/Dealer
in your area.
Checking the fastening screws
Once a week, check that the HP-accumulator
fastening screws are tight.
◆
Check that the fastening screws (C) are tight.
◆
Tighten any loose fastening screws to the right
tightening torques (see chapter Bolt
connections / Tightening torques).
◆
If any of the HP-accumulator fastening screws
are broken, replace all fastening screws.
Checking the gas pressure
After the first installation of the hydraulic breaker,
the gas pressure of the HP-accumulator must be
checked at least once during the first week.
If no loss of gas is found, the second check is to be
carried out after three months.
If no change in gas pressure is found at that stage,
then testing can be performed annually.
Further checks, e.g. prior to installation and regular
checks, are to be carried out in accordance with
national regulations.
The gas pressure changes with the gas
temperature. Before checking the gas pressure it is
necessary to wait until the temperature of the HP-
accumulator has levelled to about 20 °C.
The gas pressure can be checked by measuring
the velocity of the pressure drop in the hydraulic
system. Use a pressure gauge (measuring range ≥
250 bar).
1. Place the hydraulic breaker on timber support
blocks. The breaker box service opening must
be facing upwards.
2. Depressurise the hydraulic system before
disconnecting a hydraulic hose (see chapter
Depressurising the hydraulic system).
3. Remove the cover of the service opening.
HB 2000, 2000 DP, 2500, 2500 DP Safety and operating instructions
© Construction Tools GmbH | 3390 5090 01 | 2016-05-23
Original instructions
53
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