Speed Control - Porter-Cable 7800-XE Instruction Manual

To Start And Stop The Drywall Sander
Be certain that the power circuit voltage is the same as
that shown on the specification plate of the tool, and that
the switch is oFF "o". connect the tool to the power
circuit.
the Drywall sander is equipped with a "rocker" type
switch (a) Fig. 3. the top end of the switch button is
labeled "o" (oFF), and the bottom end of the button is
labeled "I" (on). to start the sander, press the bottom end
of the "I" switch. to stop the sander, press the top end of
the "o" switch.

Speed Control

the 7800 sander is equipped with a variable speed control. adjust the speed by turning the control
knob (B) Fig. 3. 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 1650 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 1650 rPm.
Brush-Type Skirt
a brush-type skirt (a) Fig. 4 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".
to RePlAce A skIRt
WARNING: to reduce the risk of injury, turn unit
off and disconnect it from power source before
installing and removing accessories, before
adjusting 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. 4.
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
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. 5, 6, and 7). this action enables you to sand the
top, middle, and bottom of a wall or ceiling joint without changing position.
FIG. 3
FIG. 4
8
a
B
a
B