JLG 600SC_660SJC Service Manual - Manual (Page 72)

SECTION 4 - BOOM & PLATFORM
4-32 – JLG Lift – 3120898
Crawler Tracking Adjustments
NOTE: Before making any tracking adjustments, make sure
the tracks are free of debris and adjusted per Ser-
vice Manual.
To properly adjust the tracks on the Crawler, you will need
a stopwatch, pencil & paper and two fixed landscape
objects to use as a guide for centering the tracks. The
guide tube mounted on the top front of the base boom is
used as a cross hair for centering the machine between
the two fixed landscape objects. To achieve proper adjust-
ment of the tracks we must first set the tracks to drive in a
straight line in FWD & REV. in both speeds low and high.
Use the following default settings as a starting point, once
everything is entered in the Optimizer, mark off a 50 ft.
(low) and a 200 ft. (high) start to finish point to use as a
measurement.
ADJUSTMENT EXAMPLE:
Position your machine inline with the two fixed landscape
objects, using the guide tube as your crosshair, now
squeeze the trigger on your joystick and operate the
machine in a straight line through the 50 ft. start to finish
line, checking the position of the machine and the amount
of seconds it took to drive 50 ft. Now record the low range
settings, take time to think things out, for example if your
machine is positioned too far to the left and timed out too
slow in low drive in the direction you were testing, you will
want to increase the settings on your low range adjust-
ment up and decrease the settings on your right track.
Remember the direction you moved, this will determine
which setting to change on the Optimizer, you will be able
to judge which track is moving faster when your testing
your machine, focus your attention to the links on the
tracks. Write the information down, so you won’t forget!
THRESHOLD:
Always keep in mind when adjusting Threshold, both
tracks have to operate simultaneously!
Maximum drive speed: 1.6 MPH
(STEER) (FWD) TRACK CHARACTERISTICS:
COUNTER STEERING:One track moves in the reverse
direction, the other the forward direction
GRADUAL STEER:One track comes to a stop, the oppo-
site track moves forward
(STEER) (REV) Is just the opposite of FWD.
Drive & Steer Function Check
IMPORTANT
BEFORE PLUGGING IN OPTIMIZER MAKE SURE THE WIRES ARE
INSTALLED CORRECTLY, ALSO KEYSWITCH IN PLATFORM POSI-
TION ONLY!!!!
Optimizer Plug: Red (1) Black (2) White (3) Green (4)
JLG Harness At Platform Control Box Optimizer Con-
nection:
Wht/Blk 58-1 (1) Orn/Red 49-2 (2) Orn/Red
49-3 (3) Wht/Red 57-1 (4)
The Superflex Controller is a rugged, microprocessor-con-
trolled device that can directly operate four bi-directional
electric over hydraulic valves. The Superflex receives
inputs from Digisensors mounted on the dual axis control-
ler (Drive/Steer) and converts these signals into propor-
tional PWM outputs to the EDC drive pumps A & B. Each
output signal can be independently fine-tuned and cali-
brated using the hand held Optimizer.
• THE FOLLOWING STEPS ARE VIEWING THE PER-
CENTAGE OF INPUT, TRAVELING INTO THE SUPER-
FLEX. THE FOLLOWING CAN BE DONE WITH OR
WITHOUT THE ENGINE RUNNING.
• THE FOLLOWING DEFAULT SETTING NUMBERS ARE
APPROXIMATE VALUES; THE SETTINGS YOU WILL
SEE ON YOUR UNIT MAY NOT BE IDENTICAL, THIS
IS DUE TO FRICTION, PART TOLERANCES AND
HOURS OF OPERATION.
• DRIVE AND STEER FUNCTIONS WILL REQUIRE ONE
TRACK TO MOVE SLOWER AND THE OPPOSITE
DIRECTION TO ACHIEVE PROPER TRACKING.
Controller Adjustment Optimizer
Default Setting
Optimizer
Manufacturing Setting
Threshold 15% 15%
Max Out (High) 85% 50%
Low Range 50% 70%
Ramp Up 0% 0.5%
Ramp Down 0% 0.5%
Drive Speed Feet Seconds
High 200 ft. 85-90
Low 50 ft. 80-85