JLG 800A Operation And Safety Manual page 49

SECTION 3 - MACHINE CONTROLS AND INDICATORS
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 running.
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 pressure, 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.)
3-4
6. Tower Telescope
The TOWER TELESCOPE control switch provides extending
and retracting of the tower boom when positioned to IN or
OUT. This function works only when the tower boom is fully
elevated (lift up).
TO AVOID UPSET AND SERIOUS INJURY, DO NOT OPERATE MACHINE IF TOWER LIFT
AND TELESCOPE FUNCTIONS DO NOT OPERATE IN THE ABOVE SEQUENCE.
7. 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 connect-
ing 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.
– JLG Lift – 3121209