JLG EMERGENCY DESCENT – ARTICULATED – EC450AJ

Platform or Boom Caught Overhead

1. Shut off the machine.
2. Rescue all people in the platform before freeing the machine. Personnel must be
   out of the platform before operating any controls on the machine.
3. Use cranes, forklifts, or other equipment to stabilize motion of the machine to
   prevent a tip over as required.
4. From the ground controls, use the Auxiliary Power System (if equipped) to
   carefully free the platform or boom from the object.
5. Onceclear, restart the machine and return the platform to a safe position.
6. Inspect the machine for damage. If the machine is damaged or does not operate
   properly, turn off the machine immediately. Report the problem to the proper
   maintenance personnel. Do not operate the machine until it is declared safe for
   operation.

MANUAL SWING OVERRIDE

The manual swing override is used to manually swing the boom and turntable assembly
in the event of a total power failure when the platform is positioned over a structure or
obstacle. To operate the manual swing override, proceed as follows:

1. Using a 7/8 inch socket and ratchet wrench, locate nut on swing worm gear on
   left side of machine.
2. Install wrench on nut and ratchet in the direction desired

MACHINE SAFETY SYSTEM OVERRIDE (MSSO)

The Machine Safety System Override (MSSO) is only to be used to retrieve an
operator that is pinned, trapped, or unable to operate the machine. The MSSO
will override function controls that are locked out from the platform and
ground consoles. An example of this would be in the case of Load Sense System
activation.

Note: If the MSSO functionality is used, a fault indicator is set with a fault code in the
JLG Control System which must be reset by a qualified JLG Service Technician.
Note: Nofunctional checks of the MSSO system are necessary. The JLG Control System
will set a Diagnostic Trouble Code if the control switch is faulty.
Note: If the engine is not running, MSSO will function through the Auxiliary Power
system.

To operate the MSSO, perform the following:

1. From the Ground Control Console, place the Platform/Ground Select switch into
   the Ground position.
2. Pull out the Power/Emergency Stop control switch.
3. Start the engine.
4. Press and hold the MSSO switch and the control switch for the desired function.