OPERATING CONTROLS AND PROCEDURES CD15 OPERATOR MANUAL
3-24 Published 3-30-2018, CTRL 636-05
Boom Lift Operation
Know the capacity of the crane. The operator must be
familiar with the crane’s capacity chart before lifting a load.
See how to read the capacity chart in Section 4 of this
manual. A falling load or crane tip-over can cause injury or
death.
Look for overhead obstructions before raising the boom.
Possible damage or electrocution could occur if the boom
comes in contact with over head power lines.
Always operate the hoist control to unwind the wire rope
when raising the boom. DO NOT let the hook block touch the
boom head. An automatic cutout device is installed on this
crane to inhibit the hook block from being pulled into the
boom head. When the hook block touches the anti-two-
blocking bracket (Figure 3-27) hanging from the boom head,
a switch is activated and the hydraulic flow to extend the lift
cylinder is stopped. A horn will sound, warning the operator
that the block has touched the bracket. The operator must
then lower the hook block to stop the horn and allow for
raising of the boom.
The above information also pertains when a boom extension
is attached to the boom.
To Raise the Boom
Press the accelerator pedal to increase the engine speed to
maximum RPM. Slowly pull back on the boom control lever
(Figure 3-30) until the desired raising speed is obtained. The
farther the control is pulled back the faster the boom will
raise.
NOTE: DO NOT fully raise the boom and dead end the
cylinder. If the cylinder dead ends, the RCL will
sense an overload situation and shutdown the hoist
operation. The bypass switch on the RCL must
then be actuated in order to resume operation.
To Stop Boom Movement
Slowly move the control lever to the neutral position and
decrease the engine speed to idle.
To Lower the Boom
Press the accelerator pedal to increase the engine speed to
maximum RPM. Slowly push forward on the boom control
lever (Figure 3-30) until the desired lowering speed is
obtained. The farther the control is pushed forward the faster
the boom will lower.
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