Grove Published 07-06-2017, Control # 406-03 3-25
CD5520/YB5520 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
Hoist Operation
Before making a lift, be sure all persons are clear of the load.
A falling load can cause injury or death.
Know the capacity of the crane. The operator must be
familiar with the crane’s capacity chart before lifting a load.
See Capacity Chart, page 4-1. A falling load or crane tip-over
can cause injury or death.
To Raise the Hookblock
1. With the Hoist Speed Select Switch, press the top for
high speed or the bottom for low speed hoist operation.
2. Press the accelerator pedal to increase the engine
speed to maximum rpm.
3. Slowly pull back on the hoist control lever (Figure 3-36)
until the desired raising speed is obtained. The further
the control is pulled back the faster the hookblock will
raise
To Stop Hoist Rotation
Slowly move the control lever to the neutral position and
decrease the engine speed to idle.
To Lower the Hookblock
1. With the Hoist Speed Select Switch, press the top for
high speed or the bottom for low speed hoist operation.
2. Press the accelerator pedal to increase the engine
speed to maximum rpm.
3. Slowly push forward on the hoist control lever
(Figure 3-36) until the desired lowering speed is
obtained. The further the control is pushed forward the
faster the hookblock will lower.
WARNING
When lifting a load, keep your eyes on the load at all
times. If you must look away, stop the movement of the
load first. A moving load can cause injury or death.
Always have a flagman give assistance if you can not see
a moving load. Be sure you can see the flagman at all
times. Agree in advance to hand signals to be used (see
Hand Signals, page 2-36). A moving load can cause injury
or death and/or property damage.
CAUTION
Never put side loads on the boom. Side loads can
damage the swing gearbox. Move the boom so that it is
directly above the load before lifting the load.
Do not let the hookblock touch the boom head. An
automatic cutout device is installed on this crane to
prevent the hookblock from being pulled into the boom
head. When the hookblock touches the anti-double
blocking bracket (Figure 3-33) hanging from the boom
head, a switch is activated and the hydraulic flow to raise
the drop block is stopped. A horn will sound, warning the
operator that the block has touched the bracket. The
operator must then lower the hookblock to stop the horn
and allow for other boom functions.
The above information also pertains when a boom
extension is attached to the boom.
WARNING
When lifting at high boom angles with an extended boom,
it is crucial to maintain proper side slide pad adjustment.
See Boom Adjustments in the Service Manual. Visually
check the lateral straightness of the boom before raising
the load. Lifting with a boom which is not visually straight
may cause boom failure and could result in injury or
death.
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