Platform Or Boom Caught Overhead; Manual Swing Override - JLG 450A Operation And Safety Manual

SECTION 5 - EMERGENCY PROCEDURES

Platform or Boom Caught Overhead

If the platform or boom becomes jammed or snagged in over-
head 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 immedi-
ately. Report the problem to the proper maintenance per-
sonnel. Do not operate the machine until it is declared safe
for operation.
5-2
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.
3121658