3 — OPERATION
3-5
Hand Grip and Trigger
A BOOM UP/DOWN or ROTATION pushbutton must be depressed to enable the hand
grip trigger. Pull the trigger up slowly to start boom motion. All boom motion speeds
ramp up electronically. Pull the trigger higher to speed up the boom motion.
POWER Pushbutton
When pressed, the POWER pushbutton disconnects electrical power to the upper control
panel. The POWER pushbutton should only be pressed to immediately stop all boom lift
motion. To resume control, rotate the pushbutton clockwise to disengage the switch.
Battery Charge Indicator (DC model only)
Indicator LEDs light up to indicate the level of charge remaining in the batteries. Lighted
green LEDs indicate a good charge level. Lighted yellow LEDs indicate the need for
charging soon. Lighted red LEDs warn that the battery charge level is low; boom opera-
tions should be halted until the batteries are recharged.
EMERGENCY DOWN Pushbutton
When pressed, the EMERGENCY DOWN pushbutton opens the upper cylinder retract
solenoid valve to allow a controlled basket descent. Limited battery power is required to
open the retract cylinder solenoid valve. This method of boom lowering should only be
used when the BOOM DOWN pushbutton or trigger control fails.
Upper Control Panel – Gas Model Only
The following engine controls are included on the upper 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 down for about 5 seconds while cranking the engine.
ENGINE START Pushbutton
Pressing the ENGINE START pushbutton cranks the engine. The engine should not be
cranked longer than 15 seconds at a time. Over-cranking will burn up the starter motor.
ENGINE STOP Pushbutton
Pressing the ENGINE STOP pushbutton stops the engine. The ENGINE STOP pushbut-
ton must be held down until the engine stops running.
