JLG 600SC_660SJC Service Manual - Manual (Page 71)

SECTION 4 - BOOM & PLATFORM
3120898 – JLG Lift – 4-31
Important Reminders
OPTIMIZER:
• The Optimizer only has (3) usable keys during the
scrolling and data entering steps these keys are; (+) (-)
(ENTER). (RUN) does not work with the Crawler
Series, also the other keys are covered with a white
decal.
• Always keep your foot on the footswitch to read the
Optimizer display while checking from the platform or
MTB; failure to do so will clear the screen display.
• Static checks on the unit using the Optimizer can be
accomplished in the platform, it’s tricky to run the
engine and change the settings from the platform.
Once the drive/steer joystick is brought back to the
neutral position, you only have seconds to adjust your
settings, if you cannot accomplish this, what ends up
happening the timer times out and now you will have to
remove your foot from the foot switch to reset, causing
your optimizer to clear and return to it’s original start-
up default setting.
• If possible two people can adjust the machine settings
easily and quickly, plugging the optimizer at the MTB,
this way the optimizer will never clear it’s display as
long as the operator in the platform has his foot on the
footswitch while the engine is running, all adjustments
can be made from the technician at the MTB, while the
operator in the platform can test the new settings to the
controls.
• During the scanning of the menus on the Optimizer,
there is no way to back up to a certain setting if you
mistakenly passed it up, you must scroll through the
(+) key to get where you want.
• Always remember to keep the Superflex powered up
when storing data using the ENTER key, failure to do
so will lose all changed data back to original default
settings.
• For any reason the Optimizer shows an INTIALIZING
SYSTEM displayed, check the power connections
between the Optimizer and the Superflex, a poor com-
munication link maybe the problem, check for proper
wiring hook ups at both Optimizer connections, drive/
steer joystick and drive pump EDC connections
.
DIGISENSOR:
• When you lift the lid on the control panel there will be
two digisensors with two red LED’s on each one, they
are positioned one vertically and one horizontally, the
one vertical is (DRIVE) (DS2), the one horizontally is
STEER (DS1).
• When you activate STEER the way the LED’s are posi-
tioned you would think the left LED on the horizontal
digisensor would light? It doesn’t the right one does,
the digisensor moves CCW when using left and CW
using right, the same applies for DRIVE. To check to
see if a digisensor is any good, try a resistance check.
Remove the plug from the micro switch follow the red
wires from digisensors on the drive/steer controller,
also remove the main plug which holds the ground
wires (black from the digisensor), next set your voltme-
ter to ohm’s install your positive lead into the plug
where you will see two red wires loaded into the same
connector install the lead here, next take your ground
and install it into two individually separate ground pins
in the other plug following the black wires coming out
of the digisensors, the first pin at the top of the plug
should read approximately 8.5 ohms the second pin
should read approximately 8.8 ohms, remember this is
without any movement of the joystick.
• The field has two types of digisensors installed on our
Crawlers, early version is a gray plastic appearance
with two led’s, and current production which is a gold
colored metal version with two red led’s, neither one is
waterproof.