BULL DOZERS

These versatile equipments are commonly used in construction projects. It is essentially a heavy steel blade which is mounted on the front of a tractor. The tractor can be of the crawler or the wheel type. The heavy blade attached to the tractors pushes the material from one place to another. Bull dozers are classified on the basis of:

(A). Position of blades:

1. Bull dozers with blades perpendicular to the direction of movement.
2. Angle dozers in which the blade is set at an angle with the direction of movement

(B). Based on mountings:

1. Wheel mounted
2. Crawler mounted

(C). Based on the control:

1. Cable controlled
2. Hydraulically controlled

The earth moving bull dozer consist of a heavy blade of somewhat concave profile. The blade is attached to the body of the tractor with two arms and a supporting frame. The blade is held at the lower edge on the two heavily built push arms which are hinged to the track frame of the tractor. The top of the blade is supported by two brace arms attached to the push arms. The blade is projecting ahead at the bottom.

Application-

Bull dozer are mainly used for the following operations-

1. For spreading the earth fill
2. For opening up pilot roads through mountainous and rocky terrains
3. Clearing construction sites
4. Maintaining haul roads
5. Clearing land from the trees and stumps
6. Back filling trenches at construction sites by dragging the earth from one place to another