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SUBSYSTEM 2: HYDRAULIC SYSTEM
Hydraulic power for the Bark Blower is generated by a fixed-displacement hydraulic pump
that is driven off the engine auxiliary drive. The pump receives hydraulic fluid from the
29.5-gallon (112 L) reservoir through a service ball valve and suction hose. It is then delivered
to the hydraulic manifold through an unloading valve. This hydraulic manifold block has three
separate solenoid valves that control all of the functions of the Bark Blower machine.
The hydraulic oil should be replaced per the lubrication schedule or if the oil becomes milky or
gives off a burnt odor. The hydraulic oil filter must be replaced on schedule with a 5 absolute
micron filter.
At time of manufacture, this unit contains Finn Vulhydra hydraulic oil. The chart below illustrates
the operating temperature range of the Finn Vulhydra hydraulic oil as well as the closest ISO
equivalents.
NOTE: Use equal to, or better than, a 5 micron absolute filtration.
NOTE: The Finn Vulhydra hydraulic oil may be substituted for either of
the two ISO oils listed below. Please use the temperature chart
to determine what oil works best in your situation.
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