JLG 110HX ANSI Service Manual - Manual (Page 109)

SECTION 2 - PROCEDURES
3120636 – JLG Lift – 2-85
2. Boom Angle Sensor Adjustment
a. With the platform level, the boom fully retracted
and at 45 (+/- 1) degrees elevation, measure the
DC voltage at TP5 on the Load Radius Circuit
Card.
b. Loosen the three screws securing the sensor to
the box and rotate the sensor until 7.1 (+/- 0.1)
Volts DC is measured at TP5. Tighten the screws
on the sensor.
c. Return the boom to horizontal.
3. Radius Adjustment and Display Lights Setting Pro-
cedure
a. On the Load Radius Circuit Card, measure TP11
and adjust potentiometer P6 for a reading of 0.0
Volts DC.
b. On the Load Radius Circuit Card, measure TP8
and adjust potentiometer P2 for a reading of
2.548 Volts DC.
c. On the Load Radius Circuit Card, measure TP9
and adjust potentiometer P3 for a reading of 5.0
Volts DC.
d. Telescope the boom until the leading edge of
the red marking tape is exposed from the mid
boom. Adjust potentiometer P2 until the red light
just turns on and the blue light turns off.
e. Measure TP2 and adjust potentiometer P4 until
TP7 measures 0.05 Volts DC more than TP2.
This determines the length of the boom (critical
length) where the lift down speed limiter is
turned on.
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110HX Dual Capacity
1. Length Indicator Adjustment
a. Level the frame before beginning any adjust-
ments.
b. Make all adjustments with the engine running
unless otherwise noted.
c. Fully retract the boom.
d. On the Load Radius Circuit Card, measure TP10
and insure that 10 (+0.1/-0) Volts DC is present.
e. On the Load Radius Circuit Card, adjust P1 to
1.151 Volts DC while measuring TP1.
f. Make the following adjustment with the power
off.
On the Load Radius Circuit Card, disconnect
connector J2 (the 6 pin connector on the printed
circuit board). Measure between Pin (6) of the
socket connector and ground (TB1-1), adjust
potentiometer P5 to a value of 1340 (+/- 5)
Ohms.
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Adjust the 5K Ohm potentiometer in the boom
cable reel by loosening the three screws holding
it in place.
NOTE: When checking the resistance on the 6 pin connec-
tor as outlined in step (c), be sure to use connector
pins (6) and (3) corresponding to pins (6) and (3) on
plug 2 on the circuit card.
Rotate the 5K Ohm potentiometer until you mea-
sure 100 Ohms between Pin (3) and Pin (6) on
the 6 pin plug connector which mates with J2.
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Tighten the three (3) screws on the 5K Ohm
potentiometer in the boom cable reel.
g. Turn the power on and measure TP2. It should
be 1.237 Volts DC. Re-adjust the 5K Ohm poten-
tiometer if necessary.
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