Epiroc EC 40T User Manual

Safety and operating instructions
52 © Construction Tools GmbH | 3390 5203 01 | 2019-08-06
Original Instructions
n
Immediately replace the complete HP-accumulator if
you detect:
–
cracks/fissures,
–
distortion/deformation,
–
corrosion,
–
thread damage to the threaded bores.
n
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.
n
Never operate the hydraulic breaker if you detect any
damage to the HP-accumulator.
The HP-accumulator can be replaced on site. Contact
the Epiroc Customer Center / Dealer in your area.
7.12.2 Checking the fastening screws
Once a week, check that the HP-accumulator fastening
screws are tight.
n
Check that the fastening screws(C) are tight.
n
Tighten any loose fastening screws to the right tight-
ening torques (see chapter Bolt connections /
Tightening torques).
n
If any of the HP-accumulator fastening screws are
broken, replace all fastening screws.
We recommend changing of the o-rings on the fastening
screws when the regular replacement of all hydraulic
breaker seals is performed. The fastening screw o-rings
need replacing at least after every 1000 carrier operating
hours.
7.12.3 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 car-
ried 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 (68°F).
The gas pressure can be checked by measuring the ve-
locity of the pressure drop in the hydraulic system. Use a
pressure gauge (measuring range ≥ 250bar (3625psi)).
1.
Place the hydraulic breaker on timber support blocks.
The breaker box service opening must be facing up-
wards.
2.
Depressurise the hydraulic system before discon-
necting a hydraulic hose (see chapter Depressuris-
ing the hydraulic system).
3.
Remove the cover of the service opening.
4.
Connect the pressure gauge to the HP-accumulator
via the pressure line »P«.
5.
Close the tank line »T«.
You need an assistant to monitor the pressure
gauge.
WARNING Injury by impacts
A sudden movement of the carrier may cause your
assistant to be hit and injured by the boom or the hy-
draulic attachment.
u Only move the boom very slowly and in a con-
trolled manner while an assistant is within the
danger zone.
u Always keep sight of your assistant.
6.
Switch on the hydraulic breaker at the lowest possi-
ble engine rpm and mode level.
7.
Switch off the hydraulic breaker as soon as your as-
sistant indicates that the operating pressure (180bar
(2610psi)) is reached.
8.
Open the tank line »T« a little and slowly release
pressure.
9.
Watch the pressure gauge during the release proce-
dure. As soon as the gas pressure in the HP-accu-
mulator is reached, the indicator stops shortly and
then drops sharply to zero.
10.
Refilling is required if the gas pressure is lower than
50bar (725psi). Refilling must be performed by an
authorized person. Contact the Epiroc Customer
Center / dealer in your area.

Epiroc EC 40T Specifications

General

Brand	Epiroc
Model	EC 40T
Category	Industrial Equipment
Language	English