MAN.234 Rev.3 ENG - Use and maintenance manual S19HD PRO
page
10
of
83
2.3.1
Frame
The frame
1
(Picture 3) is a steel structure having a quality appropriate in
order to distribute the weight of the equipment when the MEWP is in driv-
ing position. The frame is equipped with 4 hydraulic jacks used for stabili-
sation [2 front stabilizers cylinders
2
(Picture 3), 2 rear stabilizers cylinders
3
(Picture 3). The base
4
(Picture 3) for the support slewing ring is on the
frame and through the rotation unit allows the tilting of the equipment.
2.3.2
Turret
The turret
5
(Picture 3), made of quality steel, is fixed to the bearing (slew-
ing ring). The rotation of the superstructure is allowed by a hydraulic motor
with brake normally closed, constrained to the turret.
2.3.3
Pantograph
The pantograph
6
(Picture 3)
is constituted by two parallel arms (panto-
graph upper crank
6'
(Picture 3)
and pantograph lower crank
6''
(Picture 3)
and by the pantograph connecting rod
7
(Picture 3).
The arms (tubular with
rectangular section, bended and electro-welded) and the connecting rod
are made with high quality steel sheets. The movement of the pantograph
(lifting and lowering the pantograph) is obtained thanks to the hydraulic cyl-
inder for lifting the pantograph
12
(Picture 3).
This cylinder is fastened to
the turret (barrel side) and to the upper pantograph crank (rod side) and is
equipped with double-acing balancing valve.
The pantograph has a working range from 0° to about +65° with respect to
the horizontal.
2.3.4
Telescopic boom
The telescopic boom
8
(Picture 3) is hinged to the turret. The telescopic
boom is composed of three elements: a fixed boom
9
(Picture 3) hinged to
the turret and two telescopic booms
10
11
(Picture 3).
The extraction movement (or return) of the telescopic boom is obtained by
moving the "telescopic boom extraction cylinder"
13
(Picture 3).
The lifting (or lowering) movement of the telescopic boom is obtained by
moving the "telescopic boom lifting cylinder"
14
(Picture 3).
2.3.5
Basket
The basket
16
(Picture 3) is connected to the second boom of the tele-
scopic element through the oscillating support
15
(Picture 3). It is made
with tubular aluminium or steel, bent, welded and hot galvanised, covered
in fibreglass
*
or made in a structure completely in fibreglass
*
; it is
equipped with side or front opening for operator access. The opening is
self-hinged and built to avoid accidental openings. The platform is provided
with attachments for the safety belts, a guard-rail at a height of 1.1 m from
the floor, an intermediate guard-rail and a foot guard band along all the
sides of the platform. The floor is in anti-skid and self-draining aluminium.
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