JLG 80HX_HX+6 ANSI Operator Manual - Manual (Page 64)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3-26 – JLG Lift – 3120270
11. Wheel Drive/4 Wheel Drive.
The two position 2 WHEEL DRIVE/4 WHEEL DRIVE
control switch allows the operator to select high
speed (2 WHEEL DRIVE) or low speed (4 WHEEL
DRIVE).
TO AVOID PERSONNEL INJURY OR MACHINE DAMAGE, USE
SLOW FUNCTION SPEED CONTROL WHEN POSITIONING THE
PLATFORM IN CLOSE QUARTERS.
12. Drive Speed.
The two-position DRIVE SPEED control switch
allows the operator to select high pump flow, pro-
viding additional speed to the drive function when
positioned to HIGH.
13. Drive.
The WHEEL DRIVE controller (proportional con-
trols) or WHEEL DRIVE control lever (hydraulic con-
trols) provides driving either forward or backward
when positioned to FORWARD or REVERSE. The
controller is ramped to allow infinitely variable driv-
ing speed between fast and slow.
14. 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 to UP or DOWN.
15. Platform Rotate (If Equipped).
The PLATFORM ROTATE control switch allows
operator to rotate the basket to the left or right when
positioned to the desired direction.
16. Choke (If Equipped).
A push-button switch supplies power to the choke
solenoid for cold weather starting.
17. Glow Plug (If Equipped).
This push-button switch when depressed supplies
power to the diesel engine glow plugs for cold
weather start. See diesel engine operator manual
for instructions.
18. Auxiliary Power.
The AUXILIARY POWER control switch energizes
the electrically operated hydraulic pump, when
actuated. The switch must be held ON for duration
of auxiliary 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 hydrau-
lic flow.
WHEN OPERATING ON AUXILIARY POWER, DO NOT OPERATE
MORE THAN ONE FUNCTION AT THE SAME 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 position-
ing when operating in close quarters in the following
sequence:
a. Position PLATFORM/GROUND switch to
PLATFORM.
b. Position the IGNITION/EMERGENCY STOP
switch to ON.
c. Depress and hold the footswitch.
d. Operate appropriate control switch or lever for
desired function and hold.
e. Position AUXILIARY POWER switch to ON and
hold.
f. Release AUXILIARY POWER switch, selected
control switch or lever, and footswitch.
g. Position IGNITION/EMERGENCY STOP switch
to OFF.