JLG 600A_AJ Service Manual - Manual (Page 185)

SECTION 4 - BOOM & PLATFORM
3121201 – JLG Lift – 4-9
Installation
1. Using a suitable lifting device, position tower boom
assembly on turntable so that the pivot holes in both
boom and turntable are aligned.
2. Install tower boom pivot pin, ensuring that location
of hole in pin is aligned with attach point on turnta-
ble.
3. If necessary, gently tap pin into position with soft
headed mallet. Secure pin mounting hardware.
4. Using all applicable safety precautions, operate lift-
ing device in order to position lower boom lift cylin-
der so that holes in the cylinder rod end and tower
boom structure are aligned. Insert the lift cylinder
pin, ensuring that location of hole in pin is aligned
with attach point on tower boom.
5. Connect all wiring connections at ground controls.
6. Connect all hydraulic lines running from aft end of
tower boom assembly to ground controls.
7. Using suitable lifting device, position upright on
tower boom assembly so that the pivot holes in both
upright and tower boom are aligned.
8. Using all applicable safety precautions, operate lift-
ing device in order to position upright leveling cylin-
der so that holes in the cylinder barrel end and
upright structure are aligned. Insert the level cylinder
pin, ensuring that location of hole in pin is aligned
with attach point on upright.
9. Align upper lift cylinder with attach holes in upright.
Using a soft head mallet, install the cylinder pin
upright and secure with mounting hardware.
10. Align master cylinder with attach holes in upright.
Using a soft head mallet, install the cylinder pin
upright and secure with mounting hardware.
4.4 BOOM CLEANLINESS GUIDELINES
The following are guidelines for internal boom cleanliness
for machines that are used in excessively dirty environ-
ments.
1. JLG recommends the use of the JLG Hostile Envi-
ronment Package to keep the internal portions of a
boom cleaner and to help prevent dirt and debris
from entering the boom. This package reduces the
amount of contamination which can enter the boom
but does not eliminate the need for more frequent
inspections and maintenance when used in these
types of environments.
2. JLG recommends that you follow all guidelines for
servicing your equipment in accordance with the
instructions outlined in the JLG Service & Mainte-
nance Manual for your machine. Periodic mainte-
nance and inspection is vital to the proper operation
of the machine. The frequency of service and main-
tenance must be increased as environment, severity
and frequency of usage requires.
3. Debris and foreign matter inside of the boom can
cause premature failure of components and should
be removed. Methods to remove debris should
always be done using all applicable safety precau-
tions outlined in the JLG Operation & Safety Manual
and the JLG Service & Maintenance Manuals.
4. The first attempt to remove debris from inside the
boom must be to utilize pressurized air to blow the
debris toward the nearest exiting point from the
boom. Make sure that all debris is removed before
operating the machine.
5. If pressurized air cannot dislodge the debris, then
water with mild solvents applied via a pressure
washer can be used. Again the method is to wash
the debris toward the nearest exiting point from the
boom. Make sure that all debris is removed, that no
“puddling” of water has occurred, and that the
boom internal components are dry prior to operating
the machine. Make sure you comply with all federal
and local laws for disposing of the wash water and
debris.
6. If neither pressurized air nor washing of the boom
dislodges and removes the debris, then disassem-
ble the boom in accordance to the instructions out-
lined in the JLG Service & Maintenance Manual to
remove the debris.