Page 151 - Moving the Earth_ The Workbook of Excavation

ROCK, SOIL, AND MUD

ROCK, SOIL, AND MUD 3.45

FIGURE 3.35 Walking out on cross poles.

If the tractor is too badly bogged down to turn, the only available anchor is not directly in line,
and the winch is of a type that the cable runs off the spool on an angle pull, then run the cable out
until it is slack, then hold it with a crowbar or stick so that it reels on the side of the spool opposite
to the direction of the anchor. When the pull begins, it will be off center and will have a tendency
to turn the tractor in line with the anchor. If it does not do this, it will wind onto the drum in a spiral
making one or more loops before reaching the edge on the anchor side, moving the tractor a short
distance. The line can then be slacked and the procedure repeated.
If the angle between tractor direction and anchor is too great, a second anchor must be used and
a chain from that adjusted to hold the cable in line. Use of a snatch or pulley block, as shown in Fig.
3.37, will prevent damage to the cable from the chain hook. If alignment is satisfactory but the winch
does not have enough power to debog the machine, a pulley may be chained to the anchor and the
winch line passed around that and back to the tractor drawbar. This will nearly double the pull.

Dozer Down Pressure. If the tractor is equipped with a hydraulic bulldozer, but no winch, the blade
should be raised; planks, poles or other floats placed, dug or driven under it; and down pressure