JLG 120HX Operator Manual - Manual (Page 38)

SECTION 3 - USER RESPONSIBILITIES AND MACHINE CONTROL
3-8 – JLG Lift – 3120818
6. Lift Control (Extend-A-Reach).
A three-position EXTEND-A-REACH lift control
switch provides raising/lowering of the Extend-A-
Reach when positioned up or down.
7. Telescope Control.
The three-position TELESCOPE control switch pro-
vides extension and retraction of the boom, when
positioned to in or out.
8. Swing Control.
The three-position SWING control switch provides
360 degrees continuous turntable rotation when
positioned to right or left.
WHEN OPERATING ON AUXILIARY POWER, DO NOT OPERATE
MORE THEN ONE FUNCTION AT THE SAME TIME. SIMULTA-
NEOUS OPERATION CAN OVERLOAD THE AUXILIARY PUMP
MOTOR.
9. Auxiliary Power Control.
A toggle type AUXILIARY POWER control switch
energizes the electrically operated auxiliary hydrau-
lic pump, when actuated. The switch must be held in
the ON position for the duration of auxiliary pump
use.
The auxiliary pump functions to provide sufficient oil
flow to operate the basic machine functions should
the main hydraulic pumps or engine fail. The auxil-
iary pump enables the telescope, lift, and swing,
functions to be operated.
It should be noted that the functions will operate at a
slower than normal rate due to the lower amount of
hydraulic flow provided.
10. Circuit Breaker.
The 3 amp circuit breaker return control power to the
High Engine circuit when depressed.
11. Hourmeter.
An hourmeter, installed in the ground control box,
registers the amount of time the machine has been
in use, with the engine running. The hourmeter reg-
isters up to 9,999.9 hours and cannot be reset.
12. Voltmeter.
An voltmeter, installed in the ground control box,
indicates battery condition (i.e. charging or dis-
charging).
13. Oil Pressure Gauge.
An oil pressure gauge, installed in the ground con-
trol box, provides an indication of the engine lubri-
cating oil pressure. Normal operating pressure at
2000 rpm is 40 to 60 psi.
14. Axles Set Indicator.
The AXLES SET indicator provides a visual indica-
tion that the extendable axles are properly set. It
consists of a green indicator that lights up when the
axles are extended and the retaining pins are prop-
erly installed.
TO AVOID SERIOUS INJURY, DO NOT OPERATE MACHINE IF ANY
CONTROL LEVERS OR TOGGLE SWITCHES CONTROLLING
PLATFORM MOVEMENT DO NOT RETURN TO THE OFF POSITION
WHEN RELEASED.
15. Rotate (If equipped).
The three position platform ROTATE control switch
permits rotation of the platform when positioned to
left or right.
16. Level.
The three position platform LEVEL control switch
allows the operator to compensate for any differ-
ence in the automatic self leveling system by posi-
tioning the control switch to up or down.