JLG 600A_AJ Service Manual - Manual (Page 182)

SECTION 4 - BOOM & PLATFORM
4-6 – JLG Lift – 3121201
4.3 TOWER BOOM
Removal
1. Remove the tower upright as follows:
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDI-
ATELY AFTER DISCONNECTING LINES TO AVOID ENTRY OF CON-
TAMINANTS INTO SYSTEM.
a. Tag and disconnect hydraulic lines to upper lift
cylinder. Use suitable container to retain any
residual hydraulic fluid. Cap hydraulic lines and
ports.
b. Using suitable lifting device, support the upper
lift cylinder.
c. Remove mounting hardware from upper lift cyl-
inder barrel end. Using a suitable brass drift and
hammer remove pin #1 from tower upright.
d. Tag and disconnect hydraulic lines to master cyl-
inder. Use a suitable container to retain any
residual hydraulic fluid. Cap hydraulic lines and
ports.
e. Remove mounting hardware from master cylin-
der barrel end. Using a suitable brass drift and
hammer remove pin #2 from tower upright.
f. Disconnect wiring hardness to horizontal limit
switch and dual capacity limit switch.
g. Using a suitable lifting device, support the tower
upright.
h. Remove mounting hardware securing hose
bracket in tower upright, remove hose bracket.
i. Remove mounting hardware from tower leveling
cylinder. Using a suitable brass drift and ham-
mer remove pin #3 from tower upright.
j. Remove mounting hardware from upright pivot
pin. Using a suitable brass drift and hammer,
remove pin #4 from tower upright. Remove
upright from tower boom assembly.
2. Remove the tower boom as follows:
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDI-
ATELY AFTER DISCONNECTING LINES TO AVOID ENTRY OF CON-
TAMINANTS INTO SYSTEM.
a. Tag and disconnect all hydraulic lines from the
tower boom assembly to turntable components.
Use suitable container to retain any residual
hydraulic fluid. Cap hydraulic lines and ports.
b. Disconnect wiring harness from the ground con-
trol box.
c. Using suitable lifting device, support the tower
boom assembly at it’s approximate center of
gravity.
d. Remove mounting hardware from lower lift cylin-
der rod end. Using a suitable brass drift and
hammer, remove pin #1 from the tower boom
assembly.
e. Remove mounting hardware from tower boom
pivot pin. Using a suitable brass drift and ham-
mer, remove pin #2 from the turntable assembly.
Figure 4-5. Location of Components - Upright