Operator Unable To Control Machine; Platform Or Boom Caught Overhead; Manual Descent With Engine Running And Electrical Power - JLG X500AJ Operation And Safety Manual

SECTION 5 - EMERGENCY PROCEDURES

Operator Unable to Control Machine

IF THE PLATFORM OPERATOR IS PINNED, TRAPPED OR
UNABLE TO OPERATE OR CONTROL MACHINE:
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 OPERA-
TION 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.

Platform or Boom Caught Overhead

If the platform or boom becomes jammed or snagged
in overhead structures or equipment, rescue platform
occupants prior to freeing the machine.
NOTE: The engine runs the hydraulic pump which provides
the hydraulic pressure for the hydraulic system.
The electric power provides power for the hydraulic
proportional valve solenoids to open and close which
operate various solenoids and relays on the hydraulic
system. In the event either/or both are not operating
properly, the following procedures will allow the low-
ering of the boom and platform.
5-2
Manual Descent with Engine Running and Electrical
Power
ENSURE BOOM IS NOT POSITIONED OVER THE OUTRIGGERS OR OVER-
HEAD OF PERSONNEL BEFORE LOWERING.
Using Platform/Remote Control Box from Platform
(See Figure 5-1.)
The manual descent system is provided as an emergency
means to lower personnel in the platform.
1. Check that the emergency stop button (item 10) is
in the ON position by turning it clockwise.
2. Press and hold down button 4 (item 4)
with the hazard symbol on the plat-
form/remote control box. The LCD dis-
play (item 14) will indicate the triangle
symbol seen on the button in LCD posi-
tion 8.
3. Select a boom function to operate by moving it's
controller in the direction for lowering.
4. When finished, release the emergency lowering
switch (item 4).
5. Position (press) the emergency stop switch to the
OFF position.
– JLG Lift – 3121636