JLG 600SC_660SJC Operator Manual - Manual (Page 68)

SECTION 6 - EMERGENCY PROCEDURES
6-2 – JLG Lift – 3120897
Manual Descent (If Equipped)
The manual descent valves are used, in the event of total
power failure, to retract and lower the boom using gravity.
The manual descent valves are located on the right side of
the turntable (in tank compartment). Look for the instruc-
tion decal located on the right side of turntable below con-
trol valve. This system should be used if there is a total
power failure since the valves will permit use of gravity to
retract and lower the boom. The procedures are as fol-
lows:
1. To lower and retract the boom: Close knob #1
(clockwise), open knob #2 (counterclockwise).
Observe the boom powertrack to see if the boom is
lowering and retracting. When the boom is com-
pletely retracted, go to STEP #2. (If no movement is
observed, go to step #2).
2. To lower boom: Open knob #1 (counterclockwise),
knob #2 must remain open.
6.4 EMERGENCY OPERATION
Use of Ground Controls
KNOW HOW TO USE THE GROUND CONTROLS IN AN
EMERGENCY SITUATION.
Ground personnel must be thoroughly familiar with the
machine operating characteristics and the ground control
functions. Training should include operation of the
machine, review and understanding of this section and
hands-on operation of the controls in simulated emergen-
cies.
Operator Unable to Control Machine
IF THE PLATFORM OPERATOR IS PINNED, TRAPPED OR
UNABLE TO OPERATE OR CONTROL THE MACHINE:
DO NOT OPERATE WITH PRIMARY POWER SOURCE (ENGINE OR
ELECTRIC MOTOR) IF PERSONS ARE PINNED OR TRAPPED. USE
AUXILIARY POWER INSTEAD.
1. Operate the machine from ground controls ONLY
with the assistance of other personnel and equip-
ment (cranes, overhead hoists, etc.) as may be be
required to safely remove the danger or emergency
condition.
2. Other qualified personnel on the platform may use
the platform controls with regular or auxiliary power.
DO NOT CONTINUE OPERATION IF CONTROLS
DO NOT FUNCTION NORMALLY.
3. Cranes, forklift trucks or other equipment which may
be available are to be used to remove platform
occupants and stabilize motion of the machine in
case machine controls are inadequate or malfunc-
tion when used.
Platform or Boom Caught Overhead
If the platform or boom becomes jammed or snagged in
overhead structures or equipment, do not continue opera-
tion of the machine from either the platform or the ground
until the operator and all personnel are safely moved to a
secure location. Only then should an attempt be made to
free the platform using any necessary equipment and per-
sonnel. Do not operate controls to cause one or more
wheels to leave the ground.
Post Incident Inspection and Repair
Following any incident, thoroughly inspect the machine
and test all functions first from the ground controls, then
from the platform controls. Do not lift above 10 feet (3 m)
until you are sure that all damage has been repaired, if
required, and that all controls are operating correctly.
6.5 INCIDENT NOTIFICATION
It is imperative that JLG Industries, Inc. be notified imme-
diately of any incident involving a JLG product. Even if no
injury or property damage is evident, the factory should
be contacted by telephone and provided with all neces-
sary details.
Contact your local JLG office.
It should be noted that failure to notify the manufacturer of
an incident involving a JLG Industries product within 48
hours of such an occurrence may void any warranty con-
sideration on that particular machine.