Epiroc EC 90T - Prefilling; Prefilling the HP-Accumulator; Prefilling Pressures for HP-Accumulators; Filling Procedure

Instructions
6 © Construction Tools GmbH | 3390 5140 01 | 2020-09-15
Original Instructions
3 Prefilling
A hydraulic breaker with factory-made depressurised
HP-accumulator and piston accumulator is marked with
a corresponding label located on the hydraulic breaker's
hose connection.
Accumulators must be filled with nitrogen minimum class
4.0, ultra-clean, N
2
99.9 vol.%.
n
Place the hydraulic breaker on a pallet or timber sup-
port blocks. The breaker box service opening must
be facing upwards.
n
Follow the instructions to prefill a depressurised ac-
cumulator within an ambient temperature range of
-20°C to +40°C (-4°F to +104°F).
n
Adjust to the correct pressure at operating tempera-
ture during commissioning.
n
Follow all instructions in the Safety and operating in-
structions as well as the national/regional laws and
regulations valid in the country of use.
3.1 Prefilling the HP-accumulator
n
Pressurise the HP-accumulator in accordance with
the ambient temperature.
3.1.1 Prefilling pressures for HP-
accumulators
HP-accumulator 0.9l and 1.5l
50,0
55,0
60,0
65,0
-20 -10 0 +10 +20 +30 +40
y
x
x = Ambient temperature [°C]
y = Prefilling pressure [bar]
For better readability please refer to the enlarged version
of this diagram at the end of this Prefilling instruction.
3.1.2 Filling procedure
The following accessories can be supplied:
• 1 accumulator filling device with accessories, part
number 3360920415
From the available or supplied service box you will re-
quire:
• 1 nitrogen cylinder 2l, part number 3363034504
or
• 1 nitrogen cylinder 5l, part number 3363034506
• 1 pressure-relief valve, part number 3361329516
• 1 country-specific adapter, if required (see additional
document, document number 3390710601)
When filling the HP-accumulator, please observe the di-
agram above and follow the instructions provided step
by step.
N
O
P
Q SR
O
1.
Remove the Allen screws(N) and the pairs of lock
washers(O).
2.
Remove the plate(P) respectively the plates(P) from
the breaker box.
3.
Remove the protective cap(S) from the HP-accumu-
lator's(Q) filler adapter(X).