JLG 740AJ Operator Manual - Manual (Page 44)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-4 – JLG Lift – 3121295
5. Engine Start/Auxiliary Power Switch
or
Engine Start/ Auxiliary Power Switch /Function Enable.
To start the engine, the switch must be held "UP"
until the engine starts.
To use auxiliary power, the switch must be held
“DOWN” for duration of auxiliary pump use. Aux
power can only be used if the engine is not run-
ning.
If equipped, the enable switch must be held
"DOWN" to enable all boom controls when the
engine is running.
NOTE: Auxiliary power only works if there is no engine oil pres-
sure, and is disabled if engine is running.
NOTE: Functions will operate at a slower than normal rate
because of the lesser flow of hydraulic fluid delivered.
WHEN USING AUXILIARY POWER, DO NOT OPERATE MORE THAN ONE
FUNCTION AT A TIME. (SIMULTANEOUS OPERATION CAN OVERLOAD
THE AUXILIARY PUMP.)
6. Hourmeter
An hour meter, installed in the bottom portion of the
Ground Control box, registers the amount of time the
machine has been in use, with engine running. By con-
necting into the oil pressure circuit of the engine, only
engine run hours are recorded. The hour meter registers
up to 9,999.9 hours and cannot be reset.
7. Platform/Ground Select Switch
A three position, key operated switch supplies power to
the platform control console when positioned to PLAT-
FORM. With the switch key held in the GROUND posi-
tion, power is shut off to platform and only ground
controls are operable.
NOTE: With the Platform/Ground Select Switch in the center posi-
tion, power is shut off to controls at both operating sta-
tions.