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The Drywall Sander has an articulating sanding head. The head can swivel in
multiple directions, allowing the abrasive pad to conform to the work surface
(Figs. 6, 7, and 8). This action enables you to sand the top, middle, and bottom
of a wall or ceiling joint without changing position.
1. Turn the vacuum cleaner switch ON (I). (Model 7800 only).
To reduce the risk of personal injury, ALWAYS wear a
respirator approved by NIOSH for “Dust and Mist”.
2. Turn Drywall Sander switch ON (I).
3. Position the Drywall Sander lightly against the work surface. Apply just
enough pressure to align the sanding head with the work surface.
4. Apply additional pressure to engage the abrasive pad on the work surface.
Move the sander in an overlapping pattern to smooth the drywall compound
down to a “featheredge”.
The 7800 Sander is equipped with a variable speed control. Adjust the speed by
turning the control knob (B) Fig. 4. The control knob is numbered “1” through “5”.
The setting “1” is the slowest speed (approximately 1000 RPM) and “5” is the
fastest speed (approximately 2,000 RPM).
Use the higher speed settings for fast stock removal. Use the lower speed setting
to reduce removal rate for more precise control. The Model 7801 Drywall Sander
has a constant speed of 2,000 RPM.
SPEED CONTROL
BRUSH-TYPE SKIRT
A brush-type skirt (A) Fig. 5 surrounds the
abrasive pad on the Model 7800. This
skirt serves two purposes:
It extends below the surface of the
abrasive pad to prevent the abrasive
from “gouging” the work.
It helps contain the drywall dust until
the vacuum cleaner pulls it away.
Replace the skirt if it is damaged or if it
is worn excessively. Replacement skirts
are available from any PORTER-CABLE
Service Center.
Since the Model 7801 requires no
vacuum cleaner, the skirt is shorter, but
still prevents "gouging".
•
•
B
Fig. 5
A
TO REPLACE A SKIRT
To reduce the risk of serious personal injury, turn tool off and dis-
connect tool from power source before installing and removing accessories,
before adjusting or changing set-ups or when making repairs. An accidental
start-up can cause injury.
1. Remove abrasive pad (see Abrasive Pad Replacement).
2. Use phillips screwdriver to remove the six retaining screws (B) Fig. 5.
3. Lift the skirt out of housing.
4. Position the new skirt to the housing and install the six retaining screws.
5. Replace the abrasive pad.
SANDING DRYWALL