JLG 2658E3 Service Manual - Manual (Page 34)

SECTION 2 - PROCEDURES
2-22 – JLG Lift – 3120878
2.19 POTHOLE PROTECTION SYSTEM LIMIT
SWITCH
Adjustment
1. With the pothole protection system in the fully down
position, mount the limit switch on the bracket in the
rear of the machine.
2. Adjust the switch to provide for 1.6mm maximum
clearance between the roller and the cam.
WHEN MOUNTING OR ADJUSTING THE LIMIT SWITCH, BE SURE
THAT THE SAFETY PROP IS BEING USED PROPERLY
3. Tighten the switch mounting hardware.
2.20 JLG SMART SYSTEM™ ANALYZER KIT
INSTRUCTIONS
WHEN INSTALLING A NEW SMART SYSTEM CONTROLLER ON
THE MACHINE, IT WILL BE NECESSARY TO PROGRAM THE CON-
TROLLER FOR THE PROPER MACHINE CONFIGURATION,
INCLUDING OPTIONS. REFER TO ANALYZER KIT NO. 2901443.
WHEN INSTALLING A NEW SMART SYSTEM CONTROLLER ON
THE MACHINE, ELECTRICAL SILICONE GREASE, JLG PART
NUMBER 0100076 OR 7016397, MUST BE APPLIED TO THE BACK
OF THE CONTROLLER.
IT IS A GOOD PRACTICE TO AVOID PRESSURE-WASHING ELEC-
TRICAL/ELECTRONIC COMPONENTS. SHOULD PRESSURE-
WASHING BE UTILIZED TO WASH AREAS CONTAINING ELECTRI-
CAL/ELECTRONIC COMPONENTS, JLG INDUSTRIES, INC. REC-
OMMENDS A MAXIMUM PRESSURE OF 52 BAR (750 PSI) AT A
MINIMUM DISTANCE OF 30.5 CM (12 IN) AWAY FROM THESE
COMPONENTS. IF ELECTRICAL/ELECTRONIC COMPONENTS
ARE SPRAYED, SPRAYING MUST NOT BE DIRECT AND BE FOR
BRIEF TIME PERIODS TO AVOID HEAVY SATURATION.
INTRODUCTION
The JLG designed SMART System™ is a 24 Volt multiplex
motor control unit installed on the electric scissor lift mod-
els 1532E3, 1932E3, 2033E3, 2046E3, 2646E3 and
2658E3.
The SMART System™ has reduced the need for exposed
terminal strips, diodes and trimpots and provides simplic-
ity in viewing and adjusting the various personality set-
tings for smooth control of: acceleration, deceleration,
creep and max-speed for the lift, drive, steering and
optional power deck functions. The function select mem-
brane board, in the upper control box, also eliminates the
need for toggle switches and a separate power enable
button as this feature is built into each function select but-
ton on the board itself.
The lift, drive and optional power deck functions are con-
trolled by a joystick, with steering being controlled by a
rocker switch built into the top of the joystick. Drive, lift,
and the optional power deck functions are selected by
first pushing the appropriate momentary select buttons on
the membrane board and then moving the joystick either
in the “A” or “B” direction. If the joystick is not activated
within three seconds of selecting a function, it will be nec-
essary to re-select a function. High drive and positive trac-
tion are used in conjunction with the drive function.
The motor controller will control current output, as pro-
grammed for smooth operation and maximum cycle time.
Ground control speeds for platform lift and the optional
power deck are also programmed into the motor control-
ler. The motor controller also features an adjustable time
limit for positive traction. Another power saving feature is
the high speed drive current limit. This feature will auto-
matically control the drive speed and controller output
when it exceeds the pre-set current limit for a specified
time and reduce the motor speed, thus conserving power.
For safety, the machines are equipped with pothole pro-
tection and elevation cutback. The pothole protection is
employed as the platform is raised. If the pothole protec-
tion does not extend, the drive function will be disabled.
When the platform is raised, the drive function goes into
creep mode.
Figure 2-21. JLG SMART System™ Controller