Figure 12-33.Dragline fairlead.
normally requires a larger diameter drag cable. The
The construction industry rates dragline buckets in
length of the hoist wire rope is also shorter than normal
different types and classes. The types and classes are as
to avoid cross winding on the hoist drum. The drag
cable pulls the bucket through the material when
digging. When the bucket is raised by the hoist wire
. Type I (light duty)
rope and moved to the dump point, dump the bucket by
. Type II (medium duty)
releasing the tension on the drag cable.
. Type III (heavy duty)
NOTE: Do not lubricate the drag cable. If the drag
. Class P (perforated plate)
cable is lubricated and pulled through the dirt, it retains
the dirt, which causes damage to the wire rope.
. Class S (solid plate)