JLG E45A_AJ ANSI Service Manual - Manual (Page 22)

SECTION 2 - PROCEDURES
2-6 – JLG Lift – 3120765
NOTE: The engine will automatically shut down under the
following conditions:
High Engine Oil Temperature
Low Engine Oil Pressure
Engine Overspeed
Generator Overvoltage
Batteries fully charged
TO AVOID INJURY FROM AN EXPLOSION, DO NOT SMOKE OR
ALLOW SPARKS OR A FLAME NEAR BATTERY DURING SERVIC-
ING. ALWAYS WEAR EYE AND HAND PROTECTION WHEN SER-
VICING BATTERIES.
Battery Charging (On Board Charger)
1. For maximum battery life:
a. Avoid completely discharging the batteries.
b. Fully charge the batteries each day the machine
is used.
c. Charge the batteries at available times between
charging.
d. Be sure the battery fluid covers the battery
plates before charging, but to avoid overflow, do
not top off the fluid level until charging.
2. To charge the batteries, connect the charger to a
115 volt source with a 15 amp minimum capacity.
3. The Charger will shut off automatically when the bat-
teries are fully charged.
4. The charge cycle is complete when the ammeter
reads 0 amps. Any reading indicates the charge
cycle is not complete.
5. Depleted batteries will take approximately 17 hours
to charge.
2.5 CYLINDERS - THEORY OF OPERATION
Upper Boom Lift, Mid Boom Lift, Lower
Boom Lift, Telescope, Slave, Master, Rotator,
and Steer
A double acting cylinder is one that requires oil flow to
operate the cylinder rod in both directions. Directing oil
(by actuating the corresponding control valve to the pis-
ton side of the cylinder) forces the piston to travel toward
the rod end of the barrel, extending the cylinder rod (pis-
ton attached to rod). When the oil flow is stopped, move-
ment of the rod will stop. By directing oil to the rod side of
the cylinder, the piston will be forced in the opposite direc-
tion and the cylinder rod will retract.
Figure 2-2. Batteries and Battery Charger