JLG 660SJ Service Manual - Manual (Page 115)

SECTION 4 - BOOM & PLATFORM
3120840 – JLG Lift – 4-13
c. Supporting the rotator, remove hardware from
pin #2. Using a suitable brass drift and hammer
remove pin #2 from the fly boom and remove
rotator.
d. Telescope boom fly section out approximately
50 cm to gain access to slave leveling cylinder.
(600AJ Model)
e. Supporting the slave cylinder, remove the hard-
ware from pin #3. Using a suitable brass drift
and hammer, remove pin #3 from the fly boom.
f. Tag and disconnect hydraulic lines to slave level-
ing cylinder. Use suitable container to retain any
residual hydraulic fluid. Cap hydraulic lines and
ports. Remove slave cylinder.
3. Remove powertrack from boom as follows:
a. Disconnect wiring harness connectors located in
tower upright.
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDI-
ATELY AFTER DISCONNECTING LINES TO AVOID ENTRY OF
CONTAMINANTS INTO SYSTEM.
b. Tag and disconnect hydraulic lines from connec-
tors at boom assembly. Use suitable container
to retain any residual hydraulic fluid. Cap
hydraulic lines and ports.
c. Disconnect dual capacity indicator limit switch
from side of boom section.
d. Remove hydraulic lines and electrical cables
from powertrack.
e. Using suitable lifting equipment, adequately
support powertrack weight along entire length.
f. Remove bolt #1 securing the push tube on the
fly boom section.
g. Remove bolt #2 securing the push tube on the
mid boom section.
h. With powertrack support and using all applica-
ble safety precautions, remove bolts #3, #4 and
#5 securing rail to the base boom section.
Remove powertrack from boom section.
4. Remove boom assembly from machine as follows:
a. Using a suitable lifting equipment, adequately
support boom assembly weight along entire
length.
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDI-
ATELY AFTER DISCONNECTING LINES TO AVOID ENTRY OF
CONTAMINANTS INTO SYSTEM.
b. Tag and disconnect hydraulic lines from tele-
scope cylinder. Use suitable container to retain
any residual hydraulic fluid. Cap hydraulic lines
and ports.
c. Remove hardware securing the lift cylinder rod
end to the base boom section.
d. Using a suitable brass drift and hammer, remove
the lift cylinder pin from base boom.
e. Remove hardware securing the master cylinder
rod end to the base boom section.
Figure 4-17. Reassembly of Components - Rotator and
Slave Leveling Cylinder
Figure 4-18. Location of Components - Boom
Powertrack (A Models)