Section 2: Power/Cable Controls; Hydraulic System - Allied Systems W8L Service Manual

Hydraulic System

The operation of the winch is controlled by an internal
hydraulic system. This system directs the fl ow of oil for
winch control functions. The suction and pressure fi lters
remove contaminants from the oil. The hydraulic pump
supplies pressurized oil for the system. The control valve
is connected by a cable to the control lever. The control
valve distributes and regulates the fl ow and pressure of
hydraulic oil to the clutches and brake while maintaining
the cooling oil fl ow.
A separate accumulator valve, mounted on the front of
the control valve body, controls the release of pressurized
oil from the accumulators. The accumulators provide
Power/Cable Controls
Figure 2-1 Hydraulic System (Power Controls) (Ratios #1 - #7)
pressurized oil for a limited amount of actuation if the
hydraulic pump is not functioning. This allows the release
of the winch brake when the tractor engine or the PTO is
not operating.
The operation of the winch is controlled by the clutches
and the brake except when the intermediate shaft is
disengaged for FREESPOOL.
When the tractor's PTO is operating, the hydraulic system
provides pressure and fl ow. The hydraulic fl ow path of the
various functions is depicted in Figures 2-8 through 2-12.
Section 2
2 - 1