JLG 1350SJP Service Manual - Manual (Page 236)

SECTION 4 - BOOM & PLATFORM
4-2 – JLG Lift – 3121142
Drive/Steer – Boom Function Interlock System (CE
ONLY)
The Drive/Steer – Boom Function Interlock System uses the
Transport Position Sensing System to sense when the boom is
out of the transport position. All controls are simultaneously
functional when the booms are within the transport position
as on the standard machine. When the boom is beyond the
transport position, the control functions are interlocked to
prevent simultaneous operation of any boom function with
drive/steer. The first function set to be operated in this mode,
becomes the master function set. In other words, while oper-
ating drive/steer functions the boom functions are inoperable.
Likewise, while operating boom functions drive/steer func-
tions are inoperable.
NOTE: For more detailed information concerning system adjust-
ment and operation, refer to Section 6 - JLG Control Sys-
tem.
Jib Stow System
This machine is equipped with a full function side swing rota-
tor that is mechanically limited to 90 degree rotation to the
left and electrically limited to 90 degrees to the right through
the use of a positive action limit switch mounted on the rota-
tor assembly. The machines stowed length can be reduced to
facilitate transportation on standard trailers by swinging the
jib further to the right using the hydraulic power of the side
swing rotator. The control system will prevent swinging the jib
past the 90 degree position unless the axles are retracted, the
boom is in the transport position, and the jib stow override
button on the platform control panel is held in combination
with the jib swing function switch. When the jib is stowed,
automatic platform leveling is disabled, the boom is restricted
to the transport position, and axle extension is disabled. This
system is functional only in the 500 lb. (230 kg) mode of the
Dual Capacity System.
NOTE: For more detailed information concerning system adjust-
ment and operation, refer to Section 6 - JLG Control Sys-
tem.
Envelope Tracking System
The Envelope Tracking System uses the envelope control sen-
sors to enhance the control of the boom within the working
envelope. Due to the shape of the working envelope, the max-
imum boom angle varies with telescope length. To maintain
unrestricted operation of the boom, the lift down function is
automatically introduced while telescoping in only when the
boom is on the rearward edge of the envelope. This only
occurs when telescoping in along the rearward edge and is
not used elsewhere within the envelope or when telescoping
out. Envelope tracking is disabled with any envelope or
moment violations or failures. The envelope tracking function-
ality and be turned off using the manual position of the boom
control select switch. Refer to Boom Control Select.
NOTE: For more detailed information concerning system adjust-
ment and operation, refer to Section 6 - JLG Control Sys-
tem.