JLG 400SJ Operation And Safety Manual page 40

SECTION 3 - MACHINE CONTROLS AND INDICATORS
WHEN OPERATING THE BOOM ENSURE THERE ARE NO PERSONNEL
AROUND OR UNDER PLATFORM.
6. Boom Lift Control.
Provides raising and lowering of the boom when posi-
tioned up or down.
7. Hourmeter.
Registers the amount of time the machine has been in
use, with the engine running. By connecting into the oil
pressure circuit of the engine, only engine run hours
are recorded. The hourmeter registers up to 9,999.9
hours and cannot be reset.
3-6
8. Platform/Ground Select Switch.
Supplies power to the platform control console when
positioned to PLATFORM. With the switch in GROUND
position, power is shut off to the platform control con-
sole, and only the controls on the ground control panel
are operable.
NOTE: With the Platform/Ground Select Switch in the center
position, power is shut off to controls at both operat-
ing stations. Remove the key to prevent the controls
from being actuated.
9. Swing Control.
Provides 360 degrees non-continuous turntable rota-
tion when positioned to the right or left.
10. Main Telescope Control.
Provides extension and retraction of the main boom,
when positioned to in or out.
– JLG Lift – 3121216