JLG 120HX Service Manual - Manual (Page 46)

SECTION 2 - PROCEDURES
2-24 – JLG Lift – 3120819
2.13 TILT ALARM SWITCH
PERFORM TILT ALARM SWITCH LEVELING PROCEDURE A MINI-
MUM OF EVERY SIX MONTHS TO ENSURE PROPER OPERATION
AND ADJUSTMENT OF SWITCH.
NOTE: Each machine is equipped with a tilt alarm switch
(sensor). The switch is factory set to activate at 5
degrees and will illuminate a warning light and sound
a warning horn. In addition, if the boom is above hor-
izontal when the switch is activated, LIFT and
SWING will go to creep speed. Consult factory for tilt
sensor adjustment. The only field adjustment neces-
sary is leveling the switch on the spring loaded
studs. There are two methods of adjustment, a man-
ual adjustment and an adjustment using a voltmeter.
Manual Adjustment
1. Park the machine on a flat, level surface. Ensure
machine is level and tires are filled to rated pressure.
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 it’s spring’s 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
and the light on the Platform Control Console illumi-
nates.
4. Slowly back off the nut, counting the number of
turns, until the circuit is again closed and the light
again illuminates.
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
YELLOW
BLACK
WHITE
RED
Figure 2-8. Tilt Switch Adjustment - Voltmeter
X
Y
Y
Figure 2-9. Tilt Switch Adjustment - Manual