Mechanical Luffing Jib (Adjustable Boom Extension) - Manitowoc Grove RT9150E Operator's Manual

SET-UP AND INSTALLATION
Mechanical Luffing Jib (Adjustable Boom
Extension)
Extension Angle Adjusting Mechanism
Crushing Hazard!
Always secure the adjustable boom extension with an
auxiliary crane or set the nose of the extension on the
ground before you remove the adjusting pins when
adjusting the angle of the jib.
This prevents the extension from suddenly unfolding and
causing serious injury or death.
CAUTION
Risk of Equipment Damage!
Always fold up the deflection sheave before adjusting the
luffing jib angle.
This will prevent any interference between the deflection
sheave and extension.
Refer to Figure 4-57.
- 0°
1
- 20°
- 40°
1
xxxx
The jib angle is determined by the position of the adjusting
pin. There are three positions:
• 0° angle: (A) – For a 0° angle, the pin (1) is installed in
the front location and is secured with the retaining clip.
• 20° angle: (B) – For a 20° angle, the pin (1) is installed in
the rear location and is secured with the retaining clip.
4-38
WARNING
1
2
FIGURE 4-57
Published 2-23-2017, Control # 644-00
RT9150E OPERATOR MANUAL
• 40° angle: (C) – For a 40° angle, the pin (1) is removed
and stored in the holder (2) and secured with the
retaining clip.
Setting the Angle with an Auxiliary Crane
NOTE: The information in this section only applies to the
mechanical luffing jib. For operation of the
hydraulic luffing jib, refer to Raising and Lowering
the Hydraulic Boom Extension, page 3-157.
If an auxiliary crane is available, the boom extension can be
slung to set the angle.
If no auxiliary crane is available, refer to Setting the Angle
without an Auxiliary Crane, page 4-38.
1. Lift the extension with the auxiliary crane until the pin (1)
(Figure 4-57) is relieved of load.
2. Lift or lower the extension with the auxiliary crane until
the adjusting pin can be installed into the position for the
required angle, refer to Extension Angle Adjusting
Mechanism, page 4-38.
3. Lower the extension with the auxiliary crane and remove
the lifting gear.
If the lattice extension now touches the ground at the
current angle, the angle will set itself when the main
boom is raised.
Setting the Angle without an Auxiliary Crane
If an auxiliary crane is not available, the extension head must
rest on the ground before the angle is changed.
Tipping Hazard!
Always enter the RCL rigging code for the current rigging
mode of the crane. Only rotate the superstructure into the
working position permitted by the RCL rigging code set
according to the Load Chart.
This prevents the crane from overturning when the main
boom is extended.
The telescoping range which is enabled for the rigging
code is only permissible for telescoping without a load
and without hookblock/hook tackle.
W h e n t h e m a i n b o o m i s f u l l y e x t e n d e d , l o a d
measurement is not possible and the RCL monitoring
depends on the working radius. For this reason, you must
unreeve the hookblock. This prevents the crane from
overturning when the main boom is extended. Serious
injury or death may occur should the crane tip or overturn.
WARNING