21
Section 2 - Components
Refer to the Wear Brush section in the Routine
Maintenance section of this manual for additional
information on adjusting and replacing the wear
brush.
NOTICE:
ALWAYS MAKE SuRE TO CHECK THE HOG HEAd FOR
SMOOTH ANd PROPER OPERATION BEFORE EACH SHIFT.
dO NOT uSE EquIPMENT THAT HAS NOT BEEN CHECKEd
THOROuGHLY.
High pressure water from the power system is
supplied by the UHP hose connected to a special
fitting at the top of the thru-shaft hydraulic pump
that is rotated by the spray bar.
The center of the rotating shaft is drilled to allow
high pressure water to pass through the pump
shaft to the spray bar. A special swivel seal as-
sembly provides a positive seal for the connection
to the high pressure hose while allowing the thru-
shaft to turn freely. A brass button seal provides
a positive seal for the spray bar to thru-shaft
connection.
The Hog Head design allows the operator to choose
several different length spray bars for specific
removal widths. The operator can choose spray
bar rotation speeds between 700 and 3000 RPM
using the adjustable control valve on the Ground
Hog handle.
Shroud
The shroud is the heavy duty stainless steel hous-
ing attached to the bottom of the thru-shaft motor
that encases the spray bar, keeping water and
debris contained for optimal vacuum extraction.
The vacuum hose is connected to the top of the
shroud by cam lock connectors.
Dirt Shield
The dirt shield threads onto the bottom of the
Thru-Shaft. It protects the lower radial bearing
by holding a special sized felt gasket against the
bottom of the shroud to help keep water and de-
bris away. The felt seal should be inspected and
adjusted whenever the spray bar is removed. The
dirt shield should be replaced if it is damaged or
worn and be adjusted “finger tight.” If it is too
tight it will prevent the spray bar from rotating.
dIRT SHIELd
FELT GASKET
Dirt Shield & Felt Gasket
Dirt Shield Installed
Shroud
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