Autoquip XLR AIR - Manual (Page 18)

18
1. Scissors lifts have maximum lifting capacity ratings (See the “Specifications”
section). The safety relief valve has been factory set to open at a point slightly
above the rated load and allows the oil to bypass into the reservoir. The safety
relief valve should not be adjusted for any reason as it could cause the motor
or pump to prematurely burn out. Applying loads exceeding the rated capacity of
the lift may result in excessive wear and damage to the lift.
2. This type of lift is designed primarily for in-plant applications and is furnished with
constant-pressure pushbutton controls. Actuating the "UP" button will cause oil to
enter the cylinders and the lift will rise.
3. When the desired height or upward travel of the platform is attained, removing the
operators’ hand from the switch or button deactivates the “UP” circuit. The oil stops
flowing and the upward
movement will stop. Once the control switch or button is
released the cylinders are locked into position at this height by a check valve in the
circuit .
4. To lower the lift, activate the "DOWN" button. Opening the down control valve
allows the oil in the cylinders to flow through the down valve at a controlled rate
and return oil to the reservoir.
5. When the desired height or downward travel of the platform is attained, removing
the operator’s hand from the switch or button deactivates the “DOWN” circuit. The
oil stops flowing from the cylinders and the downward movement will stop
. Once
the control switch or button is released the cylinders are locked into position at this
height by a check valve in the circuit .
CAUTION!
Do not operate the power unit on relief for more than a few
seconds. When on relief, the valve will make a squealing sound.
OPERATING INSTRUCTIONS