JLG 120HX Operator Manual - Manual (Page 44)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3-14 – JLG Lift – 3120818
12. Platform Level.
The PLATFORM LEVEL control switch allows the
operator to compensate for any difference in the
automatic self-leveling system by positioning the
switch up or down.
13. Platform Rotate.
The platform ROTATE control switch allows operator
to rotate the basket to the left or right when posi-
tioned to the desired direction.
14. Extend-A-Reach.
The EXTEND-A-REACH LIFT control switch allows
operator to raise or lower the snoot, as required.
15. Steer.
Controls operation of the front steer wheels. When
the steer switch is positioned right or left, the
machine will steer in the corresponding direction.
16. Axles Set Indicator (If equipped).
The green AXLES SET indicator lights to inform the
operator that the axles are set in position.
NOTE: One of the capacity indicator lights should be illumi-
nated at all times during operation. If no capacity
lights are on, a bulb is probably burned out. Opera-
tion of the machine must be halted until the lights are
working properly.
17. Capacity Indicator.
The capacity indicator displays to the operator the
maximum rated platform capacity and the maximum
radius for that capacity using colored lights and a
reach diagram. The operator must not exceed the
rated capacity or the rated radius for the load (per-
sonnel, tools, and supplies) shown on the indicator.
The blue light indicates operating within 500 lb.
range. A steady red light indicates you have
exceeded the machines operating radius. You must
immediately stop and ‘’LIFT UP’’ or ‘’TELE IN’’ until
the red light goes out. A blinking red light and a
buzzer sounding indicates you have exceeded the
platform load capacity (personnel, tools, and sup-
plies). You must immediately stop and ‘’LIFT UP’’ or
‘’TELE IN’’ until the red light goes out and the buzzer
stops. Check to make sure the load in the platform
does not exceed the rated capacity.
18. Auxiliary Power.
The AUXILIARY POWER control switch energizes the
electrically operated hydraulic pump, when actu-
ated. The switch must be held on for duration of aux-
iliary pump use.
The auxiliary pump functions to provide sufficient oil
flow to operate the basic machine system should the
main pump or engine fail. The auxiliary pump will
operator boom lift, telescope and swing.
It should be noted that the functions will operate at a
slower than normal rate because of lower hydraulic
flow.
WHEN OPERATING ON AUXILIARY POWER, DO NOTOPERATE
MORE THAN ONE FUNCTION AT THESAME TIME. SIMULTA-
NEOUS OPERATION CAN OVERLOAD THE AUXILIARY PUMP
MOTOR.
NOTE: The main function of the auxiliary power is to lower
the platform in the event of primary power failure.
Determine the reason for primary power failure and
have the problem corrected by a qualified service
technician.
NOTE: Auxiliary power is primarily intended for platform low-
ering in the event of primary power failure. However,
auxiliary power may be used for platform positioning
when operating in close quarters in the following
sequence:
a. Position PLATFORM/GROUND switch to PLAT-
FORM.
b. Pull the POWER/EMERGENCYSTOP switch out
to the on position.
c. Depress and hold footswitch.
d. Operate appropriate control switch or lever for
desired function and hold.
e. Position AUXILIARY POWER switch on and hold.
f. Release AUXILIARY POWER switch, selected
control switch or lever, and footswitch.
g. Push the POWER/EMERGENCY STOP switch to
the off position.
19. Torque Switch.
With the Torque Switch in the upper position, the
operator will have maximum drive motor speed and
minimum torque. With the switch in the lower posi-
tion, you have minimum drive motor speed and
maximum torque. Use maximum torque for driving
on slopes or rough terrain.