The dozer has a hydrostatic drive system, which transfers power from the engine to the tracks. This system elimi-
nates the conventional transmission and does not employ bevel gears or a driveline. This system also eliminates
the steering clutch.
The system is comprised of hydraulic fluid tank, hydraulic pumps and control systems, high-pressure lines to carry
oil between various components, hydraulic motors, and final drive assemblies.
The hydrostatic power train is a dual path hydrostatic transmission with high-pressure, closed drive loops. The dual
path system allows the machine to perform pivot turns and to counterrotate. In straight line driving, equal pressure
is supplied by each drive loop. To cause machine to turn, each drive loop supplies a different amount of pressur-
ized oil, based on operator input, causing one track to be driven faster than the other.
The hydrostatic powertrain system and implement hydraulic system share a single hydraulic fluid tank.
Figure 3. Powertrain Components.