Page 152 - Moving the Earth_ The Workbook of Excavation
P. 152
ROCK, SOIL, AND MUD
3.46 THE WORK
FIGURE 3.36 Climbing a cable ramp.
FIGURE 3.37 Changing angle of pull.
applied to the blade. If the hydraulic system is in good condition, this will raise the front of the
tracks clear of the mud. Poles may then be forced under the tracks, or the holes filled with rocks,
and the tractor can walk out after raising the blade. If the dozer will not raise the tractor, and there
is enough oil in the system, try letting the machine cool off, as a worn pump will develop better
pressure on thick, cold oil. If it still will not work, or if there is no time to wait, proceed as suggested
for a plain tractor.
Cable Dozer. If a tractor equipped with a cable bulldozer is stuck, and plenty of pulleys and
extra cable are available, the blade might be supported by a chain, and the control drum rigged to
pull it out. The heavy pull of multiple lines should be through the drawbar or blade.
