Wear Pads; Boom Limit Switches; Boom Cleanliness Guidelines - JLG E450A Service And Maintenance Manual

4.5 WEAR PADS

1. Shim up wear pads until snug to adjacent surface.
2. Replace wear pads when worn to thickness shown
below.
Figure 4-3. Wear Pad Thickness
3. Adjust wear pads as follows:
a. Loosen jam nut on adjustment bolt, turn bolt CW
until wear pad is snug to adjacent surface.
b. After adjustments have been made, tighten the jam
nuts on wear pad bolts.

4.6 BOOM LIMIT SWITCHES

Refer to Figure 4-4., Boom Limit Switches for adjustments to
be made to the two Boom Limit Switches which bolt in place
on the upright.
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SECTION 4 - BOOM & PLATFORM
4.7

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.
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