Emergency Operation; Manual Swing Override - JLG EC450AJ Operation & Safety Manual

Emergency Procedures
5.3

EMERGENCY OPERATION

5.3.1 Operator Unable to Control Machine
If the platform operator is pinned, trapped or unable to operate or control machine, do
the following:
1. Other personnel should operate the machine from ground controls only as
required.
2. Other qualified personnel on the platform may use the platform controls.
Do not continue operation if controls do not function properly.
3. Cranes, forklift trucks or other equipment can be used to remove platform
occupants and stabilize motion of the machine.
5.3.2 Platform or Boom Caught Overhead
If the platform or boom becomes jammed or snagged in overhead structures or
equipment, do the following:
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. Once clear, 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.
5.4

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.
86
WARNING
31219187 EC450AJ, EC520AJ