JLG 80HX_HX+6_HXER Service Manual - Manual (Page 50)

SECTION 2 - PROCEDURES
2-28 – JLG Lift – 3120863
Installation
1. Using suitable lifting equipment, position the assem-
bled boom on turntable so that boom pivot holes in
both boom and turntable are aligned.
2. Insert boom pivot pin, ensuring that locating slots in
pin are aligned with setscrew locating holes in pin
bushings.
3. If necessary, gently tap the pin into position with a
soft headed mallet. Secure the pin with setscrews.
4. Connect all wiring to the ground control box.
5. Using all applicable safety precautions, operate lift-
ing equipment in order to position the boom lift cyl-
inder so the holes in the cylinder rod end and boom
structure are aligned. Insert the lift cylinder pin.
6. If necessary, gently tap the pin into position with a
soft headed mallet, ensuring the pin plate holes are
aligned with the attach holes in the boom structure.
Install the pin attaching bolts, washers and lock-
washers.
7. Shut down all machine systems.
8. Connect the hydraulic lines running alongside of
boom.
9. Using all applicable safety precautions, operate the
machine systems and raise and extend the boom
fully, noting the performance of the extension cycle.
If chattering is apparent, the extend chain system
requires adjustment.
10. Retract and lower the boom, noting the performance
of the retraction cycle. If chattering is apparent, the
retract chain system requires adjustment.
11. Shut down all machine systems.
12. Adjust the extend and retract chain systems as
required and secure the adjustment locknuts.
13. As necessary, lubricate all points requiring lubrica-
tion.
2.13 TILT ALARM SWITCH
NOTE: There are two methods of adjustment, a manual
adjustment and an adjustment using a voltmeter.
PERFORM THE TILT ALARM SWITCH LEVELING PROCEDURE A
MINIMUM OF EVERY SIX MONTHS TO ENSURE PROPER OPERA-
TION AND ADJUSTMENT OF THE SWITCH.
Manual Adjustment
1. Park the machine on a flat, level surface. Ensure the
machine is level and the tires are filled to the rated
pressure.
NOTE: Ensure the switch mounting bracket is level and
securely attached.
2. Level the base of the indicator by tightening the
three flange nuts through approximately 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
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.
Figure 2-14. Tilt Switch Adjustment