Document 57.4400.7200 - 1
st
Edition 03/2005
INDEX
vi
TELELIFT 3713 Elite - 4017 - 4514
INTRODUCTION
50bar fill pressure), and the service brake lines is
established so the flow is distributed to such lines and
the discharge line increasing, in this way, the pressure
(and as a result the braking force) on the lines of the
service brakes. When the sliders are in the rest position,
the lines of the service brakes are connected to the
discharge.
The pressure switch set at 2-10 bar, paralleled to on of
the two lines of the service brake, sends an electrical
signal when this brake is engaged.
The pressure switch set at 70 bar and connected to
port F, sends an electrical warning signal when the
pressure inside the feeding circuit of the brake lines is
too low to guarantee the minimum braking efficiency.
The accumulator with 1.5-lt. capacity and 35bar fill
pressure is connected to port R of system S6 and is
used to unlock the parking brake of the front axle
(pos.
26)
.
The command of the parking brake is controlled by a
special valve with lever control
(pos. 27)
located in the
driving cab. In relation to the position of the lever, the
release line of the parking brake is connected to the
pressure line (parking brake unlocked) or the discharge
line (parking brake locked).
The two pressure switches set at 10-20 bar send an
electrical warning signal when the parking brake is
activated (brake locked).
The Bucher electro-hydraulic modular distributor of the
ON/OFF type for open loops
(pos. 28)
drives the
movements of the outriggers and the sway function of
the machine. It receives oil from port B of the braking
system
(pos. 24)
and uses this to operate the cylinder
of the left outrigger
(pos. 29)
, the cylinder of the right
outrigger
(pos. 30)
and the right and left sway cylinders
(pos. 31)
and
(pos. 32)
. These two cylinders
(pos. 31)
and
(pos. 32)
are cross-connected, say the annular
chamber of one cylinder is connected to the annular
chamber of the other and vice versa. This connection
is consistent with the operation of the cylinder which
move out and in an opposite way one respect to the
other. All of these cylinders are equipped with double-
acting compensation valves with safety function.
On the inlet head of this control block there is a pressure
relief valve set at 220 bar. The oil flow which is not used
by the control block to operate the outriggers and the
machine sway function, is sent to the Casappa 20 cm
3
hydraulic gear motor
(pos. 34)
for the operation of the
cooling fan of the heat exchanger
(pos. 33)
. Inside the
motor housing, there are an anti-cavitation valve and a
pressure relief valve with by-pass function set at 140
bar.
Содержание TELELIFT 3713 Elite
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