XLB-4232 DC
3-8
3-3 EMERGENCY LOWERING
The XLB-4232 DC Boom Lift is equipped with a manual emergency lowering valve that
can lower the basket in case of a power failure or an emergency situation. The emergency
lowering valve is located at the base of the lift cylinder.
Before lowering, it may be necessary to manually rotate the boom if it is over hanging an
obstruction. See the following section for this procedure.
To lower the work basket, push and turn the knurled knob counter-clockwise to desired
speed of descent (Figure 3-4). After lowering, press and turn the knob clockwise to close
the valve.
EMERGENCY
LOWERING
KNOB
Figure 3-4. Emergency Lowering Valve
3-4 MANUAL BOOM ROTATION
The boom lift is equipped with an emergency rotation handle (crank) that can be used to
rotate the boom in case of a power failure or other emergency situation.
Use the following procedure to manually rotate the boom:
1. Loosen the crank stowage tube thumbscrew (Figure 3-5).
2. Remove the crank.
3. Install the crank on the hex end of the worm gear drive screw as shown.
4. Turn the crank handle to rotate the boom.
CRANK
STOWAGE
TUBE
CRANK
IN USE
THUMBSCREW
Figure 3-5. Boom Rotation
