GROVE
Published 10-21-2011, Control # 055-03
5-5
5540F/YB5515 OPERATOR’S MANUAL
ATTACHMENTS
5
BOOM EXTENSION
Installing the Boom Extension
To use the boom extension it must be attached to the boom
head. The boom extension can be attached by performing
the following procedures:
1.
Completely retract the boom sections and lower the
boom assembly to its horizontal position.
2.
Remove the pin from the boom extension anchor
bracket (Location No. 1 in Figure 5-9. Remove the pin at
location No. 2.
3.
Swing the boom extension at pivot point No. 3. Align and
engage the boom extension with mounting hole (No. 4)
on the boom head.
NOTE:
It may be necessary to extend the boom slightly to
align the holes on the boom head with the pin hole
on the boom extension to install the pin.
4.
Remove the pins at locations No. 5 and No. 6. Swing the
boom extension (No. 7) away from the boom assembly
and install and secure pin No. 5 at location No. 8.
5.
Continue swinging the boom extension around to the
front of the boom head until pin No. 6 can be installed
and secured at location No. 9.
6.
Remove the outmost retaining pin at location No. 11. Flip
the deflector sheave bracket into an upright position.
Install and secure the pin removed at location No. 11 into
location No. 12.
7.
Remove the hoist block from the hoist wire rope.
8.
Remove the wire rope from the boom head sheaves.
9.
Using the hoist control release more wire rope from the
hoist drum and install the wire rope over deflector
sheave at the base of the boom extension.
10.
Remove the two pins (A and B, Figure 5-9 inset) and
place the wire rope over sheave No. C. Install and
secure pins A and B. The pins must not interfere with the
wire rope.
11.
Disconnect the anti-double blocking switch wires from
the connection at the boom head. Insert the wire
connector from the anti-double blocking switch in the
boom extension into the connector coming from the
boom assembly.
12.
Attach the downhaul block to the wire rope.
Stowing the Boom Extension
1.
Lower the boom to its horizontal position. Fully retract
the boom sections.
2.
Remove downhaul weight.
3.
Remove the two pins (A and B, inset Figure 5-9) from
the boom extension head assembly.
4.
Operate the hoist control and wind the wire rope onto the
hoist drum. Be sure the rope winds properly onto the
hoist drum. Install and secure the two pins.
5.
Disconnect the anti-double blocking switch wires from
the main boom wires at the connection at the boom
head.
FIGURE 5-8
Reference Only
