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Introduction
2-1 GENERAL DESCRIPTION
The XLB-4232 DC Boom Lift is designed and manufactured for positioning personnel
with their tools and equipment at overhead work locations. The rated work basket load
capacity is 300 lbs. for the XLB-4232. Basket elevation is by two hydraulic cylinders
acting on the boom sections. A hydraulic powered motor and worm gear rotates the boom
360° around a vertical axis. The hydraulic power unit includes a reservoir, pump, and
control valves.
On the battery powered (DC Model) boom lift, dual 24 Volt, 39 Amp, one horsepower,
DC electric motors drive the hydraulic pump. The DC motor is powered by four 6 Volt
DC, 245 Amp-hour, deep charge batteries connected in series. A 40 amp, automatic, on-
board battery charger is provided for recharging the batteries at the end of each work
period.
Two control panels use directional selector switches and hydraulic valves to control the
direction and speed of boom lift and rotation. One set of operator controls is provided for
ground operation and another set is provided for operation from the basket. Elevation and
rotation controls are operational only when the moving boom section is within a
programmed safe operating zone. Only one boom motion is permitted at a time, and only
as long as the boom is within the safe operating zone. When a selected boom motion
reaches a safe operating limit, the motion ceases and another motion must be selected
within the safe operating zone.
Outrigger and wheel position interlock safety switches prevent lifting operations until the
four outriggers are properly deployed and the full weight of the boom lift is loaded onto
the outriggers.
Boom elevation speeds are selected from low to high by a toggle switch. A hydraulic hose
failure at either retract-cylinder port will cause a velocity fuse to close and stop the return
oil flow. It is strongly recommended that no one adjust or tamper with these safety
devices. If service is required, please notify Bil-Jax for detailed instructions.
Emergency lowering of the basket is by a manual valve on the base of the lift cylinder.
Pushing in and turning 1/4 turn manually retracts the upper boom lift cylinder. The boom
may need to be manually rotated to a clear area before lowering.
The boom lift cylinders will not rust or corrode during storage since the cylinder rod is
fully immersed in oil. It is important that the cylinder rods be kept clean and undamaged
for the protection of the cylinder head packings.
