JLG E300 Service Manual - Manual (Page 125)

SECTION 4 - BOOM & PLATFORM
3121253 – JLG Lift – 4-27
4.3 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 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 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.
4.4 TILT SENSOR CHECK
PERFORM TILT SENSOR CHECK PROCEDURE A MINIMUM OF
EVERY SIX MONTHS TO ENSURE PROPER OPERATION AND
ADJUSTMENT OF SWITCH.
1. Check chassis out of level indicator light located on
the platform control console by driving, with the
machine in level position, up a suitable ramp of at
least 6° slope. Check the out of level alarm, with the
machine on the ramp, raise the upper boom until it
is parallel with the chassis. DO NOT RAISE ABOVE
THE PARALLEL POSITION. If the light does not illu-
minate, return the machine to a level surface, shut
down the machine, and contact a qualified techni-
cian before resuming operation.
2. If necessary, verify the tilt sensor with the analyzer.
Refer to Section 3.
4.5 FOOTSWITCH ADJUSTMENT
Adjust switch so that functions will operate when pedal is
at center of travel. If switch operates within last 1/4 inch
(6.35 mm) of travel, top or bottom, it should be adjusted.
4.6 BOOM LIMIT SWITCHES
Refer to Figure 4-9., Boom Limit Switches for adjustments
to be made of the two Limit Switches which bolt in place
on the main boom upright and turntable.