JLG H340AJ, Operation And Safety Manual

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SECTION 5 - EMERGENCY PROCEDURES
3121633 5-3
If it is necessary to raise the jib in order to properly perform the
auxiliary descent procedure, use the following procedure.
1. From the ground control console, place the Platform/
Ground Select switch in the Ground position.
2. Pull out the Power/Emergency Stop control.
3. Hold down the Auxiliary Descent Enable Switch, hold up the
jib lift control switch and operate the hand pump located
next to the hydraulic tank to raise the jib.
NOTE: The manual pump for jib lift is only operable if a malfunction of
the primary hydraulic pump has occurred.
5.5 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.