Grove Published 11-10-2014, Control # 524-00 4-25
RT880E SERVICE MANUAL BOOM
AUXILIARY BOOM NOSE
Description
The auxiliary boom nose (rooster sheave) (see Figure 4-3) is
used on the boom to simplify single part and maximum part
cable usage. The rooster sheave is installed on the main
boom nose and is secured by attach pins that pass through
the rooster sheave and the main boom nose.
INSTALLING THE BI-FOLD MANUAL BOOM
EXTENSION
1. Before installing the boom extension make sure the
crane is set up on outriggers using normal setup proce-
dures. Refer to Section 3 - Operating Controls and Pro-
cedures in the Operator Manual.
NOTE: An auxiliary crane with sling is required to install
the bi-fold boom extension.
2. Check the transport condition of the bi-fold extension.
3. Using an auxiliary crane, attach sling to the bi-fold exten-
sion.
4. Lift the bi-fold extension in front of the main boom with
the auxiliary crane and lock the 33 ft (10.1 m) section to
the right of the main boom head (Figure 4-4).
5. Pin the left side to the boom nose.
6. Establish electrical connection between the extension
and the main boom.
7. For units equipped with hydraulic luffing boom exten-
sion, establish hydraulic connections between the
extension and the main boom.
NOTE: You can also install the bi-fold swingaway boom
extension in front of a 16 ft (4.9 m) section when
6462-1
Item Description
1 Auxiliary Boom Nose
2 Sheave Assembly
3End Cap
4Screw
5 Hitch Pin
6 Hitch Pin Clip
7 Lock Pin
8 Chain
9 Cotter Pin
10 S-Hook
11 Main Boom Nose
1
2
3, 4
5
6
7
8, 9, 10
11
FIGURE 4-3
DANGER
To prevent serious injury or death, always wear personal
protective equipment; i.e., a hard hat, eye protection,
gloves and metatarsal boots.