Maintenance - DeWalt DW831 Instruction Manual

Fitting a Backing Pad and Sanding Disc
DW831
Backing pads are available as optional accessories. To fit the pad,
follow instructions provided with the accessory.
CAUTION: Proper guard must be re-installed for grinding wheel
applications after sanding applications are complete.
CAUTION: Accessories must be rated for at least the speed
recom mended on the tool warning label. Wheels and other
accessories running over rated speed can fly apart and cause injury.
Accessory ratings must always be above tool speed as shown on
tool nameplate.
Mounting Grinding Wheels (Fig. 9–12)
Grinding wheels are available as optional accessories.
1. Place the backing flange on the grinder spindle (Fig. 9).
2. Place the wheel against the flange. (For the DW831, center the
grinding wheel on the backing flange pilot.)
3. Screw the threaded flange onto the spindle (Fig. 10).
4. Rotate the spindle by hand while pressing the spindle lock button
(Fig. 11) until the spindle locks, preventing the spindle from
rotating.
5. Securely tighten the threaded flange with the supplied spanner
wrench (Fig. 12).
FIG. 9
FIG. 10
FIG. 11
Fitting Wire Cup Brushes
The wire cup brush screws directly on the spindle of the machine
without the use of flanges. A Type 27 guard is required when using
wire brushes or wheels.
CAUTION: Wear work gloves when handling wire cup brushes.
Wire brushes can become sharp.

MAINTENANCE

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.
Cleaning
WARNING: Blow dirt and dust out of all air vents with clean, dry air
at least once a week. To minimize the risk of eye injury, always wear
ANSI Z87.1 approved eye protection when performing this.
WARNING: Never use solvents or other harsh chemicals for
cleaning the non-metallic parts of the tool. These chemicals may
weaken the plastic materials used in these parts. Use a cloth
dampened only with water and mild soap. Never let any liquid get
inside the tool; never immerse any part of the tool into a liquid.
14
FIG. 12