STRAIGHT BLADE.- The straight blade (fig. 11- 17) is ideal for general dozing when materials are to

Figure 11-17.-Straight blade.

Figure 11-18.-Angle blade.

Figure 11-19.-"U" blade.

be drifted short to medium distances. Blade curvature lifts the dirt high with a rolling action to lower resistance and speed drifting. These blades have the side advanced ahead of the center section and tilt up to 15 degrees, right and left.

ANGLE BLADE.- The angle blade (fig. 11-18) is a multipurpose tool that can be used for general dozing and for the side casting of materials. The angle blade can be positioned straight ahead or angled 25 degrees to either side. The moldboard has a greater curve than a straight blade to produce more rolling action.

"U" BLADE.- The "U" blade (fig. 11-19) drifts large volume loads efficiently over long distances. The center section lifts material high with a forward roll. The side sections are angled so they lift and roll materials inward, keeping the load centered with a minimum loss of material to the side. This type of blade has the sides well advanced ahead of the center section, causing a "U" shape. It may also be tilted 15 degrees, right or left.

Figure 11-20.-Ripper attachment.

Figure _11-21.-Winch attachment.

Rippers

The ripper attachment is mounted on the rear of the dozer (fig. 11-20). The ripper is a powerful tool used to break up compacted materials; to uproot boulders and stumps; to loosen shale, sandsstone, and asphalt pavement; and to rip up concrete slabs. After these materials are uprooted or ripped, they can be removed easier by supporting equipment.

NOTE: Care should be taken when turning with the ripper teeth in the ground, because damage to the ripper teeth and assembly can occur.