2-25
OPTIONAL EQUIPMENT OPERATIONS
BOOM EXTENSION CAPACITY CHART:
The boom extension will increase the main boom reach by 20 feet (6.1 m). It will also pin
in 3 positions relative to the main boom: In Line, 15° Offset, and 30° Offset. The main
boom and boom extension capacity charts must both be considered when using the
boom extension. The smaller capacity selected between the 2 charts must be used.
Consider this example: The boom extension is offset to 15° and the main boom angle is
40°. The load radius is 52 feet (15.8 m). The boom is over the side on outriggers. The
main boom load chart (on page 2-16) shows a capacity of 3100 pounds (1380 kg) at 52
feet (16 m). The boom extension chart shows a capacity of 2600 pounds (1180 kg) at
the angles described. Since 2600 (1180 kg) is the lower of the two capacities, it is the
limiting capacity. Remember that the downhaul weight is 180 pounds (82 kg). The
actual load on the hook is limited to 2600 (1180) minus 180 (82), which equals 2420
pounds (1100 kg).
INSTALLING BOOM EXTENSION ON TIP OF BOOM:
N O T I C E
Use appropriate ladders/steps to gain access to the boom tip to perform this
installation.
1. Set the outriggers.
2. Raise and extend boom 30 feet (9 m) above the ground, paying out load line until
hook is just above ground.
3. Position boom over front, lower and retract boom leaving the load line on the
ground.
4. If the sheave block is installed, remove it.
5. Remove load line from tip sheaves and lay over opposite side of stored boom
extension.
6. Make sure the front stow pin is in place and the attach pins are removed from the
lugs on the boom tip and the mating lugs on the boom extension.
7. Remove the rear locking pin and swing the boom extension away from the rear end
of the boom until the attaching lugs mesh on the right side of the boom.
8. Insert the attach pins in the right-hand lugs and retain them with the hairpin cotters.
9. Remove the front stow pin. Extend boom to disengage from storage bracket.
Swing the boom extension around to the front until the outer lugs mesh.
10. Insert the attach pins in their outer lugs and retain them with hairpin cotters. To
insert the fourth pin, it may be necessary to rock boom extension side to side, or up
and down.
11. Replace the rear stow pin and front stow pin in their brackets for storage and insert
their hairpin cotters.
Summary of Contents for RT-300-2G
Page 6: ...1 2 DIMENSIONAL DATA Courtesy of Crane Market...
Page 7: ...1 3 RT 300 2G TURNING DIMENSIONS Courtesy of Crane Market...
Page 16: ...Courtesy of Crane Market...
Page 24: ...2 8 Courtesy of Crane Market...
Page 33: ...2 17 CAPACITY CHART FOR RT 300 2G Courtesy of Crane Market...
Page 34: ...2 18 CAPACITY CHART FOR RT 300 2G METRIC Courtesy of Crane Market...
Page 55: ...3 9 Courtesy of Crane Market...
Page 66: ...Courtesy of Crane Market...
Page 67: ...Courtesy of Crane Market...
Page 88: ...Courtesy of Crane Market...
Page 89: ...Powered by TCPDF www tcpdf org Courtesy of Crane Market...
