Boom Maintenance; Removal - JLG 600A Service And Maintenance Manual

4.2 BOOM MAINTENANCE

Removal

1. For platform/support removal see platform/support
removal diagram. (Boom Maintenance. S Models).
2. Remove rotator and slave level cylinder from fly
boom as follows:
a. Tag and disconnect hydraulic lines to rotator.
Use suitable container to retain any residual
hydraulic fluid. Cap hydraulic lines and ports.
b. Remove hardware from pin #1. Using a suitable
brass drift and hammer remove pin #1 from the
fly boom.
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
20 inches (50.8 cm) to gain access to slave lev-
eling 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.
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SECTION 4 - BOOM & PLATFORM
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.
Figure 4-3. Reassembly of Components - Rotator and
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 CON-
TAMINANTS 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.
– JLG Lift –
Slave Leveling Cylinder
4-3