2
9
9.10
Hydraulic breaker used in tunnelling
Do not use the hydraulic breaker for tunnelling in
v
ol
v
ing o
v
erhead, horizontal or floor work before taking
pre
v
entati
v
e measures!
Penetration by dust, stone fragments and
/
or water can
lead to malfunctions during operation and may e
v
en
cause the hydraulic breaker to stop working.
Please always contact the Chicago Pneumatic Cus
tomer Center
/
dealer in your region
before
starting
work in a tunnel.
9.11
Working in high outside temperatures
The temperature of the hydraulic oil must be moni
tored to ensure it does not e
x
ceed
8
0°C.
I
f higher
temperatures are measured in the tank, oil cooler
must be fitted, and
/
or installation and pressure
−
relief
v
al
v
e ha
v
e to be checked.
O
nly use hydraulic oils of sufficient
v
iscosity.
I
n
summer and in tropical climates, the minimum re
q
uirement is a hydraulic oil of type H
L
P
6
8
.
9.12
Working in low outside temperatures
For temperatures down to 20°C below freezing there
are no special regulations.
At temperatures below minus 20°C, the carrier must
be warmed up prior to use in the way described by
the e
x
ca
v
ator manufacturer.
I
n the majority of cases,
carriers and attachments are kept in protected or
e
v
en heated areas when not in use.
Howe
v
er, if the carrier and the hydraulic breaker are
left out in the open, the carrier and all e
q
uipment
must be warmed up before the hydraulic breaker can
be started up. The e
x
ca
v
ator manufacturer’s regula
tions must be obser
v
ed in full.
E
nsure that the hydraulic oil in the carrier is at least
at 0°C.
The hydraulic breaker cannot be started up until the
oil temperature is o
v
er 0°C.
Please obser
v
e the e
x
ca
v
ator manufacturer’s regula
tions.
CAUTION!
During operations, lea
v
e the e
x
ca
v
ator engine and
pumps running e
v
en during breaks.
CAUTION!
At temperatures of below 0 °C there is an increased
risk of tool fracture.
This can be pre
v
ented by preheating the tool slowly
and gradually!
Note
The hydraulic breaker and e
x
ca
v
ator will not operate
to full capacity until the oil temperature has reached
at least
6
0°C.
CAUTION!
Feeding hot hydraulic oil to an e
x
tremely cold hy
draulic breaker will cause internal stresses in the unit
resulting in its failure.
I
f the breaker is used without preheating the oil
:
H
the breaker seals may fracture
H
he diaphragm in the highpressure accumulator
may tear
9.13
Operating the breaker with the cylinders fully extended or retracted
CAUTION!
O
perating the breaker with the sho
v
el
/
stick cylinders
fully e
x
tended or retracted must be a
v
oided at all
costs. These end positions are e
q
uipped with dam
ping functions; continuous operation at full e
x
tension
/
retraction can result in damage to the hydraulic cylin
ders.
