Owner's manual

70
Model 644E Rev. 8/03
Operation
Boom Angle Indicator
The boom angle indicator (1) is a bubble type indicator with angular graduations (2)
from -20° to +80°. It is located on the left side of the outer boom (3) and is visible
from the operators position. Use this indicator to determine the boom angle when
reading the capacity chart (see “Using the Capacity Chart” on page 73).
Boom Extension Indicator
The boom extension indicator is a series of letters (4) that become visible as the
boom is extended. It is located on the left side of the intermediate boom (5) and is
visible from the operators position. Use this indicator to determine the boom
extension when reading the capacity chart (see “Using the Capacity Chart” on
page 73).
Indicators
OU0460
3
1
2
A B
OU0470
4
5