• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Blade  Pitch
Ditch  Cut

Equipment Operator Basic - Beginning construction equipment operators manual
Page Navigation
  227    228    229    230    231  232  233    234    235    236    237  
For normal grading operations, the upright position on the blade is used. For a greater cutting action, the backward pitch is used. For a greater mixing and rolling action on the material being side tasted, use a slight forward   pitch. When   spreading,   finishing,   or maintaining surface material, use a full forward pitch. This pitch accomplishes a partial compaction of the surface materials and assures filling any low spots. When selecting the correct blade pitch, you have to think about the type of operation, type of material, depth of cut, and speed of operation. Experience and practice enhance  your  skills  to  know  which  pitch  positions achieves the best blading results for the type material. Scarifying Scarifying  is  breaking  up  hard  or  compacted materials, using the scarifier on the grader. A decision to scarify a road or not depends on the availability of water to obtain the proper moisture content of the material and the amount of traffic that travels the road. The proper moisture content supports the binding of the material required for compaction and is also used as dust control. Just placing fill material on a dirt road to fill the ruts and potholes is a temporary fix. The fill material does not bind in the ruts and potholes and, therefore, will NOT remain in place. The proper way to reshape a dirt road full of ruts and potholes is to scarify the surface to the depth of the depressions. This  breaks  up  all  the  compacted surrounding surface materials. After scarifying the material, blade mix the surface materials, reshape the road,  and  compact. for Figure 10-23.—Marking cut. To  scarify  extremely  hard  or  consolidated  material, remove  alternate  scarifier  teeth.  This  will  ease  passage of the scarifier through the material. CAUTION Never make sharp turns with the scarifier teeth  in  the  ground.  Making  sharp  turns damages the scarifier and possibly bends or breaks the teeth. During prestart operations, check the scarifier teeth wear. When the caps are worn enough to cause damage to the shank, replace the cap (fig. 10-22). Figure  10-22.—Scarifier  tooth. Figure 10-24.—45-degree position of the blade. 10-10







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.