JLG X550AJ Operator Manual - Manual (Page 94)

SECTION 5 - EMERGENCY PROCEDURES
5-14 – JLG Lift – 3128791
Using The Emergency Descent In The Case Of
An Outrigger Losing Contact With The Ground
One or more of the outriggers may loose contact with the
ground which will result in the platform/remote control box
functions being inoperable except for emergency lowering.
To restore platform/remote control box functions, lower and
retract the booms and then reposition the machine and
properly set the outriggers.
Use the emergency descent from the platform if possible by
using the following sequence, fully retract main boom, fully
lower jib, fully lower tower boom, and fully lower main boom.
If this is not possible, have a properly trained person on the
ground bypass the platform safety devices and allow the
operator in the platform to lower and retract the booms or
allow emergency manual operations to bring the platform
back to the ground.
1. Locate and use the safety device bypass key as stated
above.
2. Activate the safety device bypass by turning the key in a
counterclockwise direction and hold it in position (see
decal).
3. The safety devices BYPASS icon will appear
on the platform/remote control box display.
4. Operate the machine from the platform/remote control
ONLY carrying out operations that allow the tower boom
lowering, main boom retract and jib lowering. The main
boom must be fully retracted prior to operating swing
and main boom lowering functions.
NEVER PERFORM OPERATIONS DIFFERENT TO THOSE LISTED OR
THAT CAN IN SOME WAY REDUCE THE STABILITY OF THE
MACHINE. THE ORDER OF THE BOOM MOVEMENTS MUST BE
DONE IN A WAY TO PREVENT ANY OPERATION THAT REDUCES
THE STABILITY OF THE MACHINE.
5. Once the booms and jib are fully lowered and aligned,
release the key and follow the instructions above to
secure the key.