The Bulldozer Is A Very Powerful Crawler That Is Equipped With A Blade. The Term Bulldozer Is Oftenused To Mean Any Type Of Heavy Machinery, Althoughthe Term Actually Refers To A Tractor That Is Fittedwith A Dozer Blade.Often Times, Bulldozers Are Large And Extremelypowerful Tracked Vehicles. The Tracks Give Themamazing Ground Mobility And Hold Through Very Roughterrain. Wide Tracks On The Other Hand, Help Todistribute The Weight Of The Dozer Over Large Areas,therefore Preventing It From Sinking Into Sandy Ormuddy Ground. Bulldozers Have Great Ground Hold And A Torquedivider That's Designed To Convert The Power Of Theengine Into Dragging Ability, Which Allows It Touse Its Own Weight To Push Heavy Objects And Evenremove Things From The Ground. Take The CaterpillarD9 For Example, It Can Easily Tow Tanks That Weightmore Than 70 Tons. Due To These Attributes, Bulldozers Are Used To Clear Obstacles, Shrubbery,and Remains Of Structures And Buildings.The BladeThe Blade On A Bulldozer Is The Heavy Piece Ofmetal Plate That Is Installed On The Front. Theblade Pushes Things Around. Normally, The Bladecomes In 3 Varieties:1. A Straight Blade That Is Short And Hasno Lateral Curve, No Side Wings, And Can Be Usedonly For Fine Grading.2. A Universal Blade, Or U Blade, Which Istall And Very Curved, And Features Large Side Wingsto Carry More Material Around.3. A Combination Blade That Is Shorter,offers Less Curvature, And Smaller Side Wings.ModificationsOver Time, Bulldozers Have Been Modified To Evolveinto New Machines That Are Capable Of Things Theoriginal Bulldozers Weren't. A Good Example Is That Loader Tractors Were Created By Removing Theblade And Substituting A Large Volume Bucketand Hydraulic Arms Which Will Raise And Lower Thebucket, Therefore Making It Useful For Scoopingup The Earth And Loading It Into Trucks.Other Modifications To The Original Bulldozerinclude Making It Smaller To Where It Can Operatein Small Working Areas Where Movement Is Verylimited, Such As Mining Caves And Tunnels. Verysmall Bulldozers Are Known As Calfdozers.HistoryThe First Types Of Bulldozers Were Adapted Fromfarm Tractors That Were Used To Plough Fields. Inorder To Dig Canals, Raise Earth Dams, And Partakein Earthmoving Jobs, The Tractors Were Equippedwith A Thick Metal Plate In The Front. Lateron, This Thick Metal Plate Earned The Name Blade.The Blade Of The Bulldozer Peels Layers Of Soiland Pushes It Forward As The Tractor Advances. The Blade Is The Heart And Soul Of The Bulldozer,as It Was The First Accessory To Make Full Usefor Excavation Type Jobs.As The Years Went By, When Engineers Needed Equipment To Complete Larger Jobs, Companies Suchas CAT, Komatsu, John Deere, Case, And JCB Startedto Manufacture Large Tracked Earthmoving Equipment.They Were Very Loud, Very Large, And Very Powerfuland Therefore Earned The Nickname "bulldozer".Over The Years, The Bulldozers Got Bigger, Morepowerful, And Even More Sophisticated. Theimportant Improvements Include Better Engines,more Reliable Drive Trains, Better Tracks, Andeven Hydraulic Arms That Will Enable More Precisemanipulation Of The Blade And Automated Controls.As An Added Option, Bulldozers Can Come Equippedwith A Rear Ripping Claw To Break Up Pavement Orloosen Rocky Soil.The Best Known Manufacturer Of Bulldozer Is CAT,which Has Earned A Vast Reputation For Makingtough And Durable, Yet Reliable Machines. Eventhough The Bulldozer Started Off A Modified Farmtractor, It Rapidly Became One Of The Most Usefulpieces Of Equipment With Excavating And Construction.PPPPP(word Count 605)
