Hog Technologies STRIPE SH7500, Operation Manual

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Section 2 - Stripe Hog Systems
Dirt Shield
FELT GASKET
Dirt Shield & Felt Gasket Dirt Shield Installed
Typical Wear Brush & Wear Brush Clamp
Wear Brush
The wear brush clamped to the bottom of the
shroud provides a partial seal between the shroud
and pavement. The wear brush regulates vacuum
air flow into the shroud and reduces the amount
of debris and water exiting the blasting head dur-
ing waterblasting operations. The wear brush is
an important safety feature of the blasting head
system. It must be adjusted as it wears and re -
placed as necessary. The brush assembly should
be adjusted so the brushes are always making
light contact with the pavement.
To adjust the wear brush, lower the blasting heads
to the ground and note the gap between the wear
brush and the pavement. Loosen the brush clamp
on the shroud, then slide the wear brush enough to
eliminate the gap. Tighten the clamp and recheck.
Readjust if necessary.
Refer to the Maintenance section of this manual for
additional information on adjusting and replacing
the wear brush.
Dirt Shield
The dirt shield is a felt gasket and threaded stain-
less steel flat washer that protects the thru-shaft
seals and bearings from dirt and debris during
ultra-high pressure blasting operations. It is lo-
cated between the spray bar and the shroud. The
shield and felt gasket protects the shroud from
damage while the spray bar is rotating. The dirt
shield should be inspected prior to the start of
each shift as part of the pre-start procedure and
replaced if it becomes worn or damaged. When
installing a dirt shield, it should be adjusted fin -
ger tight. If it is set too tight it will prevent the
spray bar from rotating. (Refer to the Dirt Shield
Installation procedure in the Maintenance section
of this manual for instructions for replacing the
dirt shield).