JLG 3246E2 ANSI Service Manual - Manual (Page 44)

SECTION 2 - PROCEDURES
2-30 – JLG Lift – 3120737
2.16 TILT SWITCH ADJUSTMENT
NOTE: The machine is equipped with a tilt switch (sensor),
factory set to activate when the machine is elevated
and out of level in any direction at 5 ° and will cut out
drive. Consult factory for tilt sensor adjustment. The
only field adjustment necessary is leveling the switch
on the spring loaded studs. There are two methods
of adjustment, a manual adjustment and an adjust-
ment using a voltmeter.
PERFORM TILT ALARM SWITCH LEVELING PROCEDURE A MINI-
MUM OF EVERY SIX MONTHS TO ENSURE PROPER OPERATION
AND ADJUSTMENT OF SWITCH.
Manual Adjustment
1. Park the machine on a flat, level surface and ensure
the machine is level.
NOTE: Ensure switch mounting bracket is level and
securely attached.
2. Level the base of the indicator by tightening the
three flange nuts. Tighten each nut through approxi-
mately one half of its spring travel. DO NOT ADJUST
THE “X” NUT DURING THE REMAINDER OF THE
PROCEDURE.
3. With the electrical connections complete, slowly
tighten one of the “Y” nuts until the circuit is closed
(the light on the Platform Control Console illumi-
nates, the tilt alarm sounds).
4. Slowly back off the nut, counting the number of
turns, until the circuit is closed again.
.
5. Divide the number of turns determined in step 4 in
half. Tighten the nut this many turns. The line deter-
mined by this nut and the “X” nut is now parallel to
the ground.
6. Repeat steps 3 through 5 for the remaining “Y” nut.
The switch is now level.
7. Individually push down on one corner at a time;
there should be enough travel to cause the switch to
trip. If the switch does not trip in all three tests, the
flange nuts have been tightened too far. Loosen the
“X” nut and repeat steps 3 through 7.
2.17 VOLTMETER ADJUSTMENT
1. Park the machine on a flat, level surface and ensure
the machine is level.
2. If the motor is not running, turn the ignition switch to
on.
3. Connect the black lead of the voltmeter to ground
and the red lead to the small wire protruding from
the pot on the bottom of the sensor.
4. Adjust the leveling nuts to obtain the highest possi-
ble voltage reading (between 4.0 and 4.3 volts).
5. Check the voltage at the trip point in all four direc-
tions. If the voltage reading is not symmetrical,
repeat step 4 above.
Figure 2-7. Tilt Switch Leveling
Manual Adjustment