3 — OPERATION
3-3
UPPER BOOM UP/DOWN Selector Switch
Holding the UPPER BOOM UP/DOWN selector switch in the UP position enables the
upper boom to rise. Holding the selector switch in the DOWN position enables the upper
boom to descend. Turning the SPEED CONTROL rheostat clockwise starts the boom
motion. The up or down boom motion continues until the rheostat is released, the selector
switch is released, or the upper boom reaches a hard stop or a safe travel limit.
ROTATION CW/CCW Selector Switch
Holding the ROTATION CW/CCW selector switch in the CW position enables the boom
to rotate in the clockwise direction. Holding the selector switch in the CCW position en-
ables the boom to rotate in the counterclockwise direction. Turning the SPEED
CONTROL rheostat clockwise starts the boom motion. Rotation continues until the rheo-
stat or the selector switch is released.
LOWER BOOM UP/DOWN Selector Switch
Holding the LOWER BOOM UP/DOWN selector switch in the UP position raises the
lower boom. Holding the selector switch in the DOWN position lowers the lower boom.
Turning the SPEED CONTROL rheostat clockwise starts the selected boom motion. The
up or down boom motion continues until the rheostat is released, the selector switch is re-
leased, or the lower boom reaches a hard stop or a safe travel limit.
SPEED CONTROL Rheostat
A BOOM UP/DOWN or ROTATION selector switch must be held in a motion-enable
position to enable the SPEED CONTROL rheostat. Turn the SPEED CONTROL rheo-
stat clockwise to start boom motion. All boom motion speeds ramp up electronically.
Turn the rheostat farther clockwise to increase the boom motion speed.
Lower Control Panel – Gas Model Only
The following engine controls are included on the lower control panel of the gas model
boom lift. These controls are not shown.
CHOKE Pushbutton
Pressing the CHOKE pushbutton engages the choke solenoid. For cold starting, press the
CHOKE pushbutton in for about 5 seconds while cranking the engine.
ENGINE START/STOP Selector Switch
Holding the START/STOP selector switch in the START position cranks the engine. The
engine should not be cranked longer than 15 seconds at a time. Over-cranking will burn
up the starter motor.
Holding the START/STOP selector switch in the STOP position stops the engine. The se-
lector switch must be held down until the engine stops running.
