JLG 1350SJP Service Manual - Manual (Page 240)

SECTION 4 - BOOM & PLATFORM
4-6 – JLG Lift – 3121142
Boom Control Select
The boom control select switch is mounted on the platform
control panel and allows the operator the ability to select
between two different modes of boom control functionality:
automatic and manual. While in either mode, the Envelope
Control System and Moment Control System remains active.
When the boom control is selected to the automatic boom
control position, lift and telescope movements are coordi-
nated by the control system as described in the Controlled Arc,
Controlled Boom Angle, and Envelope Tracking descriptions.
These systems will remain active to automatically assist the
operator in keeping the boom within the envelope boundar-
ies.
When operating in the automatic mode, the following func-
tionality characteristics should be noted.
• While operating Lift Up, the boom may also telescope out
(Controlled Arc)
• While operating Lift Down, the boom may also telescope in
(Controlled Arc)
• While operating Swing or Drive, the boom may lift up or lift
down (Controlled Boom Angle)
• While operating Telescope In, the boom may lift down
when at high boom angles and the creep light is flashing
(Envelope Tracking)
In addition, when the boom control is selected to the auto-
matic position, the automatic platform leveling feature is
active during lift, telescope, swing, and drive movements as
described in the Electronic Platform Leveling System descrip-
tion.
When the boom control is selected to the manual position, lift
and telescope movements are controlled separately by the
operator effectively turning off the controlled arc, controlled
boom angle, and envelope tracking systems. Without these
systems being active, the control system will stop the move-
ments of the boom when the envelope boundaries are
reached and the functions that could violate the envelope will
be restricted. The platform alarm will sound and the BCS light
will flash with attempts to operate a restricted function. In
addition, when the boom control is selected to the manual
position, the automatic platform leveling feature is active only
during lift movements.
NOTE: For more detailed information concerning system adjust-
ment and operation, refer to Section 6 - JLG Control Sys-
tem.