JLG X17J Plus Operator Manual - Manual (Page 100)

6.5.4 EMERGENCY DESCENT CONTROLLED FROM THE GROUND USING THE
HAND PUMP IN THE EVENT OF FAULTS ON ALL ENERGY SUPPLY SYSTEMS
This emergency descent function is only used if the electrical system and motors break down,
meaning one of the previous emergency operations cannot be performed.
The emergency descent from the ground can only be carried out using the hydraulic hand pump;
to move the basket, pump oil manually and simultaneously use the ground controls for the arm
movements.
To perform the emergency descent in the conditions described above, proceed as follows:
‑ Position on OFF the engine key and disconnect completely the
machine from the battery removing the battery cut‑off.
‑ Move the switch located on the hand pump to the position corre‑
sponding to movement of the aerial part.
‑ Withdraw the opening key of the distributor’s controls protection
from the engine keys group in the electrical components box.
‑ Insert the key and open the distributor’s controls protection to
access the controls.
‑ Press and hold the valve enabling knob.
The sole purpose of the emergency descent from the ground is to operate in the event of
system breakdown and to bring the basket to the ground, 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.
X17JPR0020413 96
BOOM LIFT MODELS X17JPLUS
JLG
A DJUSTING SCREW
K EYS GROUP