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3 — OPERATION
3-5
Boom Operator Levers
Five boom operator levers position proportional hydraulic valves to extend and retract
three boom lift cylinders, the boom rotation drive motor, and the basket swivel cylinder.
Pulling a boom operator lever extends the cylinder to raise the boom. Pushing a boom lift
operator lever lowers the related boom. How far the lever is pushed or pulled controls the
boom lift speed.
Pulling the boom rotation or basket rotation operator lever turns the boom or basket
clockwise. Pushing the operator lever turns the boom or basket counterclockwise. How
far the lever is pushed or pulled controls the rotation speed.
When released, the boom operator levers return to the center (valve-off) position. A decal
located in front of the valve manifold shows which boom motion is controlled by each
operator lever.
Hydraulic Hand Pump
The basket control station is equipped with a hydraulic hand pump. In case lift boom op-
erating power is lost, the hand pump is available to manually lower the lift boom. Hold-
ing the related operator lever in position and smoothly operating the hand pump lowers
the lift boom or swivels the work basket to another position.
Engine Start Pushbutton (Gas Model only)
Pressing the engine start pushbutton restarts the gasoline engine while in the work bas-
ket. The pushbutton should only be pressed until the engine starts. The engine should not
be cranked longer than 15 seconds at a time. Over-cranking will burn up the starter mo-
tor.
Audible Alarm
An audible alarm is located in the basket station control panel. The audible alarm sounds
whenever the key switch is on and the boom lift is out of level.
115 Volt Outlet
The 115 Volt AC outlet is provided for running electrical power tools in the work basket.
A connecting power cord must be plugged in to a suitable power source. The power plug
is located on the inside of the trailer frame, near the tow end of the trailer. The outlet is
rated for a 15-ampere load. Do not overload the accessory power circuit.