JLG 740AJ ANSI Operator Manual - Manual (Page 58)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-12 – JLG Lift – 3121650
ONLY USE THE PLATFORM LEVELING OVERRIDE FUNCTION FOR SLIGHT LEVELING OF
THE PLATFORM. INCORRECT USE COULD CAUSE THE LOAD/OCCUPANTS TO SHIFT OR
FALL. FAILURE TO DO SO COULD RESULT IN DEATH OR SERIOUS INJURY.
3. Platform Leveling Override
A three position switch allows the operator to
adjust the automatic self leveling system. This
switch is used to adjust platform level in situa-
tions such as ascending/descending a grade.
4. Horn
A push-type Horn switch supplies electrical
power to an audible warning device when pressed.
5. Power/Emergency Stop Switch
A two-position red mushroom shaped switch
furnishes power to Platform Controls when
pulled out (on). When pushed in (off ), power is
shut off to the platform functions.
6. Engine Start/Auxiliary Power
When pushed forward, the switch energizes
the starter motor to start the engine.
The Auxiliary Power control switch energizes
the electrically operated hydraulic pump.
(Switch must be held on for duration of auxil-
iary pump use.)
The auxiliary pump functions to provide sufficient oil flow to
operate the basic machine functions should the main pump
or engine fail. The auxiliary pump will operate tower boom
lift, tower telescope, main boom lift, main telescope and
swing.
7. Fuel Select (Dual Fuel Engine Only) (If
Equipped)
Gasoline or liquid propane fuel may be
selected by moving the switch to the appropriate position. It
is unnecessary to purge the fuel system before switching
fuels, so there is no waiting period when switching fuels
while the engine is running.