Jlg 1350SJP Service Manual User Manual Page 239

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SECTION 4 - BOOM & PLATFORM
3121142 – JLG Lift – 4-5
Dual Capacity System
The Dual Capacity System on this machine is a multiple enve-
lope control system as opposed to an indication system. 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 opera-
tor with the dual capacity select switch on the platform con-
trol 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) enve-
lope 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 operator selects the 1000
lb. (450 kg) mode and these conditions are met, the capacity
light changes from 500 lb. (230 kg) to 1000#, jib swing is disal-
lowed, 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 capac-
ity lights will flash, the platform alarm will sound, and all func-
tions except jib swing will be disabled until the capacity select
switch is put back into the 500 lb. (230 kg) position. Operation
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 adjust-
ment and operation, refer to Section 6 - JLG Control Sys-
tem.
Electronic Platform Leveling
The electronic platform leveling system uses two tilt sensors
(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 control the incline of the
platform with respect to gravity. While in the automatic posi-
tion of the boom control select (item 33) platform leveling is
active while operating drive, telescope, lift or swing and is not
active while operating any other function (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 opera-
tor can chose a platform incline other than level with gravity
and the system will maintain that incline automatically.
If a fault occurs in the platform leveling system the following
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 recy-
cled.
NOTE: For more detailed information concerning system adjust-
ment and operation, refer to Section 6 - JLG Control Sys-
tem.
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