Boom Maintenance; Removal - JLG E450A Service And Maintenance Manual

SECTION 4 - BOOM & PLATFORM

4.4 BOOM MAINTENANCE

Removal

a. Remove hardware securing the cover plate on the
side of the base boom section and remove hose
clamps. Disconnect wiring harness from ground
control harness connector.
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDIATELY AFTER DIS-
CONNECTING LINES TO AVOID ENTRY OF CONTAMINANTS INTO SYSTEM.
b. Tag and disconnect hydraulic lines from boom to
control valve. Use a suitable container to retain any
residual hydraulic fluid. Cap hydraulic lines and
ports.
NOTE: The Main Boom weighs approximately 450lbs. (204kg).
c. Using a suitable lifting equipment, adequately sup-
port boom weight along entire length.
d. Remove hardware securing the lift cylinder pin.
Using a suitable brass drift and hammer, remove pin
from the base boom.
e. Remove hardware securing the master cylinder pin.
Using a suitable brass drift and hammer, remove pin
from the base boom.
4-6
f. Remove hardware securing the base boom pin.
Using a suitable brass drift and hammer, remove pin
from the upright.
g. Using all applicable safety precautions, carefully lift
boom assembly clear of upright and lower to
ground or suitable supported work surface.
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