Part No. 57.4400.9203 GTH-4016SR • GTH-4018SR
5
March 2010
Section 2 • Specification
SPECIFICATION
REV A
block
(59)
.
The four valves of the block
(59)
are linked to the
four stabilizer cylinder
(60, 62, 64
and
66)
which
are equipped with hydraulically piloted double
check valves
(61, 63, 65
and
67)
preventing any
movement of the cylinders when they are not
pressurized.
On the GTH-4018 SR only, the four valves of
the block
(59)
feed in parallel the four stabilizers
telescope lockout cylinders
(73)
through the
four stabilizers electrical lockout valve 2 ways/2
positions
(72)
.
On the stabilizers selector valves block
(59)
inlet
line, linked to the stabilizers up movements, a
pressure relief valve
(74)
, adjusted to 100 bar, is
installed.
The scope of this relief valve is to limit the
loads against the stabilizers telescope lockout
mechanisms, in case of failure of the stabilizers
telescope arm and rotating foot sequence control.
The scope of this additional circuit, which is installed
on the GTH-4018 SR only, is to give the right
functioning sequence to the stabilizers telescope
arms and rotating feet, since each of them is moved
by the same cylinder.
In order to reduce the number of hoses linking the
undercarriage and the turret sections of the hydraulic
circuit, a tank lines collector
(68)
is installed on the
turret receiving a number of tank lines coming from
several valves installed on the turret itself.
In order to improve the life of the hoses passing
through the slewing ring and connecting the
undercarriage and turret sections of the machine,
hydraulic circuit, single rotating joints
(69)
are
installed on each of these hoses and grouped
together on a single panel mounted on the central
section of the machine undercarriage.
