JLG 660SJ Service Manual - Manual (Page 188)

SECTION 4 - BOOM & PLATFORM
4-16 – JLG Lift – 3121202
Assembly
NOTE: For location of components See Section 4-18., Loca-
tion of Components - Articulating Jib Boom.
1. Align lift cylinder with attach holes in articulating jib
boom. Using a soft head mallet, install cylinder pin
#7 into articulating jib boom and secure with mount-
ing hardware.
2. Align rotator support with attach hole in articulating
jib boom. Using a soft head mallet, install rotator
support pin #6 into articulating jib boom and secure
with mounting hardware.
3. Align bottom tubes with attach holes in rotator sup-
port. Using a soft head mallet, install rotator support
pin #5 into articulating jib boom and secure with
mounting hardware.
4. Align articulating jib boom with attach hole in articu-
lating jib boom pivot weldment. Using a soft head
mallet, install rotator support pin #4 into articulating
jib boom and secure with mounting hardware.
5. Align bottom tubes with attach holes in articulating
jib boom pivot weldment. Using a soft head mallet,
install rotator support pin #3 into articulating jib
boom pivot weldment and secure with mounting
hardware.
6. Align articulating jib boom pivot weldment with
attach holes in fly boom assembly. Using a soft head
mallet, install pivot pin #2 into fly boom assembly
and secure with mounting hardware.
7. Align the slave leveling cylinder with attach holes in
articulating jib boom pivot weldment. Using a soft
head mallet, install slave leveling cylinder pin #1
into articulating jib boom pivot weldment and secure
with mounting hardware.
4.6 LIMIT SWITCHES AND CAM VALVE
ADJUSTMENT
Adjust switches and cam valve as shown in Figure 4-19.,
Horizontal Limit and Dual Capacity Limit Switches Adjust-
ments and Figure 4-20., Transport Switch Adjustments -
CE Machines Only.
4.7 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.