Autoquip BASCULE BRIDGE - DOUBLE LEAF - Manual (Page 26)

Familiarize yourself with this operator’s manual before operating the equipment!!!
The Bascule Bridge has a maximum capacity rating (See the “Specifications” section).
The safety relief valve should not be adjusted for any reason as it could cause the
motor to prematurely burn out. Applying loads exceeding the rated capacity of the
bridge may result in permanent damage.
CAUTION!
OPERATING INSTRUCTIONS
Do not continue to activate the "UP" button if the bridge is not raising or if
it has reached the fully raised position. To do so may result in permanent
damage to the bridge.
UNITS WITH SAFETY LEG “WINGS”
Up Pushbutton
Pressing the “UP” pushbutton energizes the motor starter and energizes the safety legs
retract solenoid “B” through the bridge position limit switch circuit. The pump supplies
power to lift the Bascule Bridge, and the safety legs are powered to hold their fully
retracted position as the bridge rises.
When the Bascule Bridge approaches the vertical position, the safety legs will clear the
curb angle on the 24” cutout, the bridge position limit switch trips, de-energizing the
safety legs retract solenoid “B” and energizing the safety legs extend solenoid “A”. As
the Bascule Bridge continues to rise, the safety legs are powered out until they extend
over the curb angle.
When the safety legs are fully extended, the safety legs fully extended limit switches
trip, de-energizing the magnetic starter.
(See Figures 17 and 18)
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