Telescoping The Main Boom; Raising And Lowering The Jib (If Equipped); Function Speed Control; Machine Safety System Override (Msso) (If - JLG 400SC Operation And Safety Manual

SECTION 4 - MACHINE OPERATION

Telescoping the Main Boom

To extend or retract the main boom, use the Main
Telescope Control Switch to select In or Out move-
ment.

Raising and Lowering the Jib (If Equipped)

To raise or lower the Jib, use Jib Lift control to select Up
or Down until desired height is reached.
4.4

FUNCTION SPEED CONTROL

This control affects the speed of Telescope and
Jib Lift. Turning the knob all the way counter-
clockwise until it clicks puts Drive, Main Lift, Plat-
form Rotate, and Swing into Creep mode.
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4.5 MACHINE SAFETY SYSTEM OVERRIDE (MSSO)

(IF EQUIPPED)

The Machine Safety System Override (MSSO) is
used to override function controls for Emergency
Platform Retrieval only. Refer to Section 5.4,

Machine Safety System Override (MSSO) (If

Equipped) for operating procedures.
4.6

SKYGUARD OPERATION

SkyGuard provides enhanced control panel protection. When the
SkyGuard sensor is activated, functions in use at the time of actu-
ation will reverse or cutout. The SkyGuard Function Table pro-
vides more details on these functions.
During activation, the horn will sound and the SkyGuard beacon
(if equipped) will illuminate until sensor and footswitch are disen-
gaged.
If the SkyGuard sensor remains activated after function reversal
or cutout, depress and hold the SkyGuard Override Switch to
allow normal functions until the sensor is disengaged.
Consult the following illustrations to determine which type of
SkyGuard the machine has and how it is activated. Regardless of
type, SkyGuard function according to the SkyGuard Function
Table does not change.
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