SECTION 5 - HYDRAULICS
5-18
3121774
Turret Rotation
Turret rotation is carried out by a rotation hydraulic motor
moved by a worm screw on a bearing ring.
Turret could be rotated 180° each side till a mechanical
block, achieving a total rotation.
Emergency Gravity Descent System
Cylinders for 1
st
and 2
nd
booms, 3
rd
boom and jib are
equipped with a coil valve for gravity emergency descent,
they are controlled by the control module when the
remote control button “gravity emergency descent” is
pressed.
When they are fed they open a calibrated passage and
under the gravity effect (weight) they will allow oil to get
out from the bottom of the cylinder flowing back to the
tank (through the ON-OFF valves), so that booms will slow
down.
The coil valve for gravity emergency descent has a blue
cap.
Figure 5-24. Mechanical Block
MECHANICAL BLOCK
Figure 5-25. Valve for Gravity Emergency
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