SECTION 4 - BOOM & PLATFORM
4-8
– JLG Lift –
3121659
Install Boom Assembly
1.
Using suitable lifting equipment, position boom assem-
bly on turntable so boom pivot holes in boom and turn-
table are aligned.
2.
Install boom pivot pin, ensuring location of hole in pivot
pin aligns with attach point on upright.
3.
Using all applicable safety precautions, operate lifting
equipment to position boom lift cylinder and level link
so holes in cylinder rod end and level link are aligned
with one in turntable. Insert cylinder pins.
4.
If necessary, gently tap pins into position with a soft
headed mallet. Ensure attach holes in pins are aligned
with attach holes in boom structure. Secure with hard-
ware.
5.
Connect all hoses and wiring.
6.
Install platform to boom assembly.
7.
Connect hoses and wiring at platform control station.
8.
Using all safety precautions, operate machine systems
and extend and retract boom for four or five cycles.
9.
Shut down machine systems and check for leaks.
4.2
BOOM CLEANLINESS GUIDELINES
The following are guidelines for internal boom cleanliness for
machines that are used in excessively dirty environments.
1.
JLG recommends the use of the JLG Hostile Environment
Package if available 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 environ-
ments.
2.
JLG recommends that you follow all guidelines for ser-
vicing your equipment in accordance with the instruc-
tions outlined in the JLG Service & Maintenance Manual
for your machine. Periodic maintenance and inspection
is vital to the proper operation of the machine. The fre-
quency of service and maintenance 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 precautions outlined in
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 com-
ply with all federal and local laws for disposing of the
wash water and debris.
6.
If neither pressurized air nor washing of the boom dis-
lodges and removes the debris, then disassemble the
boom in accordance to the instructions outlined in the
JLG Service & Maintenance Manual to remove the
debris.
Summary of Contents for JLG 450AJ
Page 2: ......
Page 32: ...SECTION 1 SPECIFICATIONS 1 18 JLG Lift 3121659 NOTES...
Page 80: ...SECTION 4 BOOM PLATFORM 4 2 JLG Lift 3121659 Figure 4 1 Boom Assembly...
Page 81: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 3 Figure 4 2 Main Boom Assembly Sheet 1 of 2...
Page 82: ...SECTION 4 BOOM PLATFORM 4 4 JLG Lift 3121659 Figure 4 3 Main Boom Assembly Sheet 2 of 2...
Page 83: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 5 Figure 4 4 Upper Boom Assembly...
Page 84: ...SECTION 4 BOOM PLATFORM 4 6 JLG Lift 3121659 Figure 4 5 Jib Assembly...
Page 118: ...SECTION 4 BOOM PLATFORM 4 40 JLG Lift 3121659 NOTES...
Page 156: ...SECTION 5 BASIC HYDRAULIC INFORMATION HYDRAULIC SCHEMATICS 5 38 JLG Lift 3121659 NOTES...
Page 164: ...SECTION 6 JLG CONTROL SYSTEM 6 8 JLG Lift 3121659 Figure 6 2 Tilt Sensor Location...
Page 169: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 13 Figure 6 7 Analyzer Connecting Points...
Page 181: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 25 Figure 6 19 Platform Module Sheet 1 of 2...
Page 182: ...SECTION 6 JLG CONTROL SYSTEM 6 26 JLG Lift 3121659 Figure 6 20 Platform Module Sheet 2 of 2...
Page 224: ...SECTION 6 JLG CONTROL SYSTEM 6 68 JLG Lift 3121659 NOTES...
Page 340: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 7 116 JLG Lift 3121659 NOTES...
Page 341: ......
