JLG 120HX ANSI Service Manual User Manual
Page 43
SECTION 2 - PROCEDURES
3120686
– JLG Lift –
2-23
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 pin into position with a soft
headed mallet. Secure pin with setscrews.
4.
Connect all wiring to ground control box.
5.
Using all applicable safety precautions, operate lift-
ing equipment in order to position boom lift cylinder
so that holes in cylinder rod end and boom structure
are aligned. Insert lift cylinder pin.
6.
If necessary, gently tap pin into position with a soft
headed mallet, ensuring that pin plate holes are
aligned with attach holes in boom structure. Install
pin attaching bolts, washers and lockwashers.
7.
Shut down machine systems.
8.
Connect hydraulic lines running along side of boom.
9.
Install boom length/angle sensor box. Adjust boom
length/angle sensor box in accordance with para-
graph 2-26.
10.
Using all applicable safety precautions, operate
machine systems and raise and extend boom fully,
noting the performance of the extension cycle. If
chattering is apparent, extend chain system requires
adjustment.
11.
Retract and lower boom, noting performance of
retraction cycle. If chattering is apparent, retract
chain system requires adjustment.
12.
Shut down machine systems.
13.
Adjust extend and retract chain systems as required
and secure adjustment locknuts.
14.
As necessary, lubricate all points requiring lubrica-
tion.