Hoses; Quick-Release Couplings; Hydraulic Oil; Nipple - Chicago Pneumatic BRK 25 Sicherheits- Und Betriebsanleitung

Safety and operating instructions

Hoses

For connection on the machine, the hydraulic hose
must be approved for a working pressure of at least
160 bar (2300 psi) and have a ½ in. (12.7 mm) inner
diameter. To resist exterior wear and tear, we
recommend using a 2-layer hydraulic hose. The
machine connection marked P (pump) is the oil inlet,
and the connection marked T (tank) is the oil outlet.
Always connect both hoses and make sure that all
hose connections are tight. Never carry the machine
by the hose.

Quick-release couplings

The original hydraulic hoses are fitted with Flat-Face
quick-release couplings that are strong and easy to
clean. The quick-release couplings are fitted so that
the male connection supplies oil and the female
connection receives oil.
NOTICE Wipe all couplings clean before
connecting. Ensure that couplings are clean and
correctly engaged before operation. Failure to do so
may result in damage to the quick couplings and
cause overheating and cause foreign matter to enter
the hydraulic system.

Hydraulic oil

In order to protect the environment, Chicago
Pneumatic recommends the use of biologically
degradable hydraulic oil. No other fluids must be
used.
♦ Viscosity (preferred) 20-40 cSt.
Viscosity (permitted) 15-100 cSt.
♦
Viscosity index Min. 100.
♦
Standard mineral or synthetic oil can be used. Make
sure to only use clean oil and filling equipment.
When the machine is used continuously, the oil
temperature will stabilise at a level which is called
the working temperature. This will, depending on
the type of work and the cooling capacity of the
hydraulic system, be between 20-40°C (68-104°F)
above the ambient temperature. At working
temperature, the oil viscosity must lie within the
preferred limits. The viscosity index indicates the
connection between viscosity and temperature. A
high viscosity is therefore preferred, because the oil
can then be used within a wider temperature range.
The machine must not be used, if oil viscosity fails
to remain within the permitted area, or if the
14
working temperature of the oil does not fall between
20°C (68°F) and 70°C (158°F).

Nipple

At delivery, breakers BRK 25 D, BRK 40 and BRK 40
VR are factory set to 20 l.p.m (EHTMA C). They can
not be adjusted to a higher flow. BRK 55, BRK 55 VR,
BRK 55 HBP, BRK 55 VR HBP, BRK 70, BRK 70 VR, BRK
70 HBP and BRK 70 VR HBP are supplied factory set
to 30 l.p.m (EHTMA D). There is a plastic bag in the
package with a label and restrictor nipple that should
be mounted on the tank line (T) if there is a need for
the breaker to be set to 20 l.p.m. The size of the
orifice is stamped on the nipple. BRK 95 and BRK 95
VR are supplied factory set to 30 l.p.m (EHTMA D).
They also have a plastic bag in the package with a
label and a nipple with no restrictor if there is a need
for the breaker to be operated at 40 l.p.m (EHTMA
E).
There is also a possibility for the breakers to be set
to intermediate flows (25 l.p.m and 35 l.p.m) as
specified in the table below. The nipples needed for
these settings are not supplied with the breaker, they
have to be ordered from the spare parts list.
BRK 95 HBP is supplied factory set to 30 l.p.m
(EHTMA D).
Oil flow rate
20 l.p.m 25 l.p.m
BRK no -
25 D restrictor
BRK no -
40 restrictor
BRK no -
40 VR restrictor
BRK restrictor restrictor
55 3.4 4.2
BRK restrictor restrictor
55 VR 3.4 4.2
BRK restrictor restrictor
70 3.4 4.2
BRK restrictor restrictor
70 VR 3.4 4.2
BRK - -
95
BRK - -
95 VR
BRK - -
95
HBP
3392 5166 90 | Original instructions
BRK 25, 40, 55, 70, 95
30 l.p.m 35 l.p.m 40 l.p.m
- - -
- - -
- - -
no - -
restrictor
no - -
restrictor
no - -
restrictor
no - -
restrictor
restrictor restrictor no
4.2 5.2 restrictor
restrictor restrictor no
4.2 5.2 restrictor
restrictor - -
5.2