Solenoid Valves For Emergency Descent; Safety Device Bypass Key - JLG X17JPLUS Operator, Safety, And General Maintenance Manual

MUX17JP021602 EMERGENCY DEVICE
10.3.SOLENOID VALVES FOR EMERGENCY DESCENT
Fig. 66 Solenoid valves for emergency descent
The cylinders of the first‐second booms, of the third boom and the JIB have a so‐
lenoid valve for emergency descent. Activating the emergency descent button on
the remote control ʺPush buttons (p. 59)ʺ energises these solenoid valves, which
allow the descent of the aerial part of the structure due to gravity. The use of this
emergency device depends on the platformʹs electrical system being powered.
10.4.SAFETY DEVICE BYPASS KEY
The machine has a key device that acts on the electrical circuit, bypassing the pla‐
tform safety systems. The device is situated on the cover of the electrical compo‐
nents compartment. The use of this selector switch is illustrated in the following
paragraphs on how to use the machine.
Boom Lift Models X17JPLUS 71