Dozer Designs Push the Cutting Edge by ProQuest


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									Crawler        I   Dozers

The John Deere 764 HSD defines a new machine form that fills a gap between           The cab-forward design on the Komatsu dozers improves visibility to the blade,
finish dozers and motor graders.                                                     eases operation for less experienced operators and allows for a smoother ride.

         Dozer Designs Push the Cutting Edge
         After years of evolution, there is a full-scale revolution.
                                                                          By Curt Bennink

A     fter a decade of slow evolution,
      2008 marks the advent of revo-
lutionary change in dozer designs.
                                         lized. For example, the 764 HSD
                                         could replace a finish dozer and a
                                         grader in applications where you
                                                                                     tional dozer, enabling faster grading
                                                                                     speeds. “We are able to final grade at
                                                                                     up to twice the speed of a steel track
                                                                                                                               grading ability of a motor grader in
                                                                                                                               that case.” He claims the 764 HSD
                                                                                                                               would actually be more maneuver-
Convention has been placed on the        are simply finishing up a building          machine,” notes Drescher. “As the         able than a grader in this situation.
sideline as “clean sheet” designs        pad or a section of road. “It has the       technology advances for grade con-           In addition, an 18-mph top speed
have resulted in the introduction of     potential on a site to replace some of      trol systems, we will probably exceed     through its hydrostatic transmission
unique solutions to previous limita-     the machines that are only working          that a little bit.”                       allows the 764 HSD to move quickly
tions. Following is a look at three of   part of the time,” says Drescher. “You         The length combined with 6.2-psi       across large jobsites. “Because it does
the most innovative concepts intro-      can then dedicate those machines to         ground pressure and center-pivot          have rubber tracks, you can go across
duced this year.                         another job where they are working          articulation offer some unique oper-      any paved or finished structures
                                         all of the time.”                           ating characteristics. “It allows you     without damage to the surfaces,”
Defining a new                               The unique specifications of the        to do some pretty close in and pre-       says Drescher. “You eliminate the
machine category                         764 HSD give it advantages in cer-          cise work, like fine grade rock in a      need to either board over the surface
   This Spring, the John Deere 764       tain applications. With a 22-ft. 5-in.-     finish parking lot,” says Drescher. “It   or put the equipment on a lowboy
HSD (High-Speed Dozer) took              long base, it is longer than a tradi-       has the flotation of a dozer and the      and haul it to the end of the site.”
CONEXPO-CON/AGG attendees                                                                                                         For jobsites that are close together,
by surprise. With a profile unlike                                                                                             the 764 HSD can easily be roaded. “It
any dozer currently on the market,                                                                                             has turn signals, flashing warning
the quad rubber-tracked 764 HSD is                                                                                             lights and slow-moving vehicle license
intended to bridge the gap between a                                                                                           plate capability,” notes Drescher.
dozer and a motor grader in certain                                                                                               At 200 hp, the 764 HSD is not
applications.                                                                                                                  going to replace a primary scraper
   “It is going to show really well                                                                                            tractor. But it is equipped to pull
in any application that requires a                                                                                             rear-mounted attachments such as
machine with pushing ability that                                                                                              sheepsfoot compaction wheels, land
can work around finished pavement,                                                                                             planes or smaller pull-type scrapers.
plus requires mobility on a jobsite,”                                                                                          “We have shown it is a real versatile
says Dan Drescher, product mar-                                                                                                machine with an 11- or 12-yd. dolly
ket manager - crawlers, John Dee
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