JLG 1100S Service Manual - Manual (Page 153)

SECTION 4 - BOOM & PLATFORM
3121256 – JLG Lift – 4-5
Dual Capacity System (1100SJP Only)
The Dual Capacity System on this machine is a multiple
envelope control system as opposed to an indication sys-
tem. The control system changes the working envelope
and moment limits to match the capacity select mode to
either the 500 lb. (230 kg) mode or the 1000 lb. (450 kg)
mode. It then displays the capacity mode on the platform
and ground display panel and controls the positions of the
boom within the allowable envelope for that mode. This
mode is selectable by the operator with the dual capacity
select switch on the platform control panel. The 500 lb.
(230 kg) mode has the largest envelope and allows the
use of the side swing jib. The 1000 lb. (450 kg) mode has
a smaller envelope and requires the jib to be fixed in the
centered position. To select the 1000 lb. (450 kg) mode
the boom must already be in the smaller 1000 lb. (450 kg)
envelope and the jib must be centered (+/-10 degrees)
verified to the control system by the jib centered limit
switch mounted on the side swing rotator. When the oper-
ator selects the 1000 lb. (450 kg) mode and these condi-
tions are met, the capacity light changes from 500 lb. (230
kg) to 1000#, jib swing is disallowed, and the envelope
and permitted moment values are changed accordingly.
When the operator selects the 1000 lb. (450 kg) mode and
these conditions are not met, both capacity lights will
flash, the platform alarm will sound, and all functions
except jib swing will be disabled until the capacity select
switch is put back into the 500 lb. (230 kg) position. Oper-
ation of jib swing in this condition can be used to find the
center position of the jib as the jib swing function will stop
when the center position is reached.
NOTE: For more detailed information concerning system
adjustment and operation, refer to Section 6 - JLG
Control System.
Electronic Platform Leveling
The electronic platform leveling system uses two tilt sen-
sors (mounted on either side of the pivot weldment), a
control valve (mounted to the platform support), a level
cylinder, and the platform control module (mounted in the
platform control box) to automatically measure and con-
trol the incline of the platform with respect to gravity. While
in the automatic position of the boom control select plat-
form leveling is active while operating drive, telescope, lift
or swing and is not active while operating any other func-
tion (e.g. rotate, jib, or steer). While in the manual position
of the boom control select, platform leveling is active while
operating lift only. The system controls the platform angle
relative to gravity using a set point established during
power-up (cycling of the EMS) or at the conclusion of a
manual platform level override by the operator using the
platform level override switch from either the platform or
the ground control. In other words the operator can chose
a platform incline other than level with gravity and the sys-
tem will maintain that incline automatically.
If a fault occurs in the platform leveling system the follow-
ing will occur:
• Automatic platform leveling will stop (except when
there is a fault in only one sensor)
• The platform level fault indicator will flash
• The platform alarm will sound
• All functions will default to creep speed if in platform
mode and the boom is out of the transport position.
Refer to Transport Position Sensing System.
To reset the fault the emergency stop switch should be
recycled.
NOTE: For more detailed information concerning system
adjustment and operation, refer to Section 6 - JLG
Control System.