Installation - JLG 660SJ Service And Maintenance Manual

22. Align holes in aft end of mid boom section with holes in
wire rope mounting block. Secure with mounting hard-
ware.
NOTE: Boom wire ropes must be torqued after installation of
boom assembly.
23. Align holes in rod end of telescope cylinder with holes in
push bar. Install push bar pin and secure with mounting
hardware.
23. Install hydraulic lines and electrical cables, and harness-
ing powertrack components as follows:
a. Align holes in powertrack rail with attachment holes
in side of base boom section. Secure rail with
mounting hardware.
b. Install powertrack to rail with mounting hardware.
c. Attach push tube bracket to side of mid boom sec-
tion with mounting hardware.
NOTE: Do not over tighten attach bolt on push tube bracket. It
should pivot freely.
d. Install slide block and wear pads to powertrack rail
with mounting hardware.
e. Install powertrack to push tube with mounting
hardware.
f. Carefully feed hoses and electrical cables through
aft end of powertrack rail, powertrack, and push
tube.
g. Ensure all hoses and cables are properly routed
through powertrack rail, powertrack, and push tube.
Tighten or install all clamping or securing apparatus
to hoses or cables, as necessary.
h. Install powertrack cover and push tube rods with
mounting hardware.
Figure 4-21. Boom Powertrack Assembly
3121298

Installation

1. Using a suitable lifting device, position boom assembly
on turntable so pivot holes in both boom and turntable
are aligned.
2. Install boom pivot pin. Ensure location of hole in pin is
aligned with attach point on turntable.
3. If necessary, gently tap pin into position with soft
headed mallet. Secure pin mounting hardware.
4. Align push bar pivot hole with pivot holes in turntable.
Install push bar pivot pin, Ensure location of hole in pin
is aligned with attach point on turntable.
5. If necessary, gently tap pin into position with soft
headed mallet. Secure pin mounting hardware.
6. Connect all wiring to ground control box.
7. Connect all hydraulic lines running along side of boom
assembly.
8. Using all applicable safety precautions, operate lifting
device to position boom lift cylinder so holes in cylinder
rod end and boom structure are aligned. Insert lift cylin-
der pin. Ensure location of hole in pin is aligned with
attach point on boom.
9. Align holes in boom structure with hole in master cylin-
der. Insert master cylinder pin. Ensuring hole in pin is
aligned with attach point on boom.
10. Adjust retract and extend cables to proper torque. Refer
to paragraph 2-6, boom cable torque procedures.
11. Using all applicable safety precautions, operate machine
systems and raise and extend boom fully. Note exten-
sion cycle performance.
12. Retract and lower boom. Note retraction cycle perfor-
mance.
– JLG Lift –
SECTION 4 - BOOM & PLATFORM
4-13