JLG X19J Operator Manual - Manual (Page 96)

6.5.4 EMERGENCY DESCENT CONTROLLED FROM THE GROUND IN THE EVENT
OF SUDDEN OPERATOR ILLNESS, WITH THE MOTOR RUNNING AND ELECTRI‑
CAL SYSTEM FAULT
This emergency descent function is used only if the operator feels ill while the motor is run‑
ning and the electrical system has broken down or if it is not possible to perform the pre‑
vious emergency operations.
Any movement of the arms must be performed AT THE MINIMUM SPEED POSSIBLE.
‑ Remove the proportional valve adjusting knob from the electrical
components compartment and place it in the corresponding adju‑
sting screw located in the proportional valve compartment.
‑ Tighten the knob. THE POSITION OF THE KNOB ADJUSTS
MOVEMENT SPEED. TIGHTENING INCREASES SPEED;
ALWAYS CARRY OUT MOVEMENTS AT THE SLOWEST
SPEED POSSIBLE.
‑ Take the key opening the distributor controls’ protection, if any,
from the keys group inside the electrical components compart‑
ment.
‑ Insert the key and open the distributor controls’ protection, if any,
to access the controls.
‑ Use the levers and/or buttons corresponding to the ON‑OFF coils
accessible from the bottom of the distributor protection so as to
enable the required movement, following the instructions on the
sticker positioned near the controls.
The sequence of movements is the following:
‑ retract extension arm
‑ fold jib arm
‑ fold first‑second arm
‑ fold third arm.
‑ At the end of the emergency operation, loosen the knob on the
proportional valve completely and remove it, reclose the protec‑
The sole purpose of the emergency descent from the ground is to bring the basket to the
ground in order to assist the operator, all other uses are prohibited.
During this procedure it is prohibited to perform any operations other than those described
above, for example to extend the telescopic arm or the jib arm, to move the stabilisers and
generally to perform operations that may cause the machine to lose stability.
D ISTRIBUTOR
PROTECTION
A DJUSTING
SCREW
A DJUSTING
KNOB
O N ‑ OFF LEVERS / BUTTONS
X19JR0620113 92
BOOM LIFT MODELS X19J
JLG