ATTACHMENTS CD5520/YB5520 OPERATOR MANUAL
5-4 Published 07-06-2017, Control # 406-03
Adjusting the Boom Extension Offset
The boom extension offset is adjustable by moving the boom
head to a negative 15° or 30°. With the boom attached it is
necessary to both raise or lower the jib boom and the boom
head simultaneously. The boom extension is very heavy and
must not be lifted and supported by one person.
1. Lower the hook and ball to the ground.
2. Provide adequate support at the end of the boom
extension. If a mechanical hoist or equivalent is
available, use it to support the boom extension. If no
hoist is available, use two or three persons to support
the end of the boom extension.
3. Remove the retaining clip and rope retention pin from
the top of the boom head (Figure 5-6).
4. Remove the lynch pin (Figure 5-7) from the pivot lock
pin.
5. With the boom extension supported, remove the pivot
lock pin (Figure 5-8). It will be necessary to remove the
boom extension weight on the pin in order to remove it.
6. Raise or lower boom extension until the desired offset
angle is achieved.
7. Install the pivot lock pin and lynch pin.
8. Install the rope retention pin and retaining clip into the
top of the boom head (Figure 5-6). Check that the wire
rope is not contacting retention pin at the top of the
boom head.
DANGER
The boom extension is very heavy. Use adequate support
to hold the boom from falling when the pivot anchor pin is
removed. A falling boom can cause serious injury or
death.
FIGURE 5-6
p0369
Pivot Lock Pin
Rope Retention
Pin
Reference Only