OPERATING CONTROLS AND PROCEDURES CD15 OPERATOR MANUAL
3-22 Published 3-30-2018, CTRL 636-05
Boom Telescope Operation
NOTE: Always operate the hoist control to unwind the wire
rope when extending 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 telescope 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
extension of the boom.
The above information also pertains when a boom
extension is attached to the boom.
NOTE: Look for overhead obstructions before raising the
boom. Possible damage or electrocution could
occur if the boom comes in contact with overhead
power lines.
To Extend the Boom Sections
Press the accelerator pedal to increase the engine speed to
maximum RPM. Slowly push forward on the telescope
control lever (Figure 3-29) until the desired extend speed is
obtained. The farther the control is pushed forward the faster
the boom will extend.
To Stop Extension/Retraction
Slowly move the control lever to the neutral position and
decrease the engine speed to idle.
To Retract the Boom Sections
Press the accelerator pedal to increase the engine speed to
maximum RPM. Slowly pull back on the telescope control
lever (Figure 3-29) until the desired retract speed is
obtained. The farther the control is pulled back the faster the
boom will retract.
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