Prior To Operation - DeWalt D28490 Instruction Manual

5. Screw the threaded sanding clamp nut (L) supplied with the backing pad
onto the spindle. The ring on the threaded clamp nut must face towards
the rubber backing pad.
6. Press the spindle lock button (C) and rotate the spindle (D) until it locks
in position.
7. Tighten the threaded sanding clamp nut (L) with the two-pin spanner.
8. Release the spindle lock.
9. To remove the rubber backing pad, loosen the threaded clamp nut (L)
with the two-pin spanner.
FIG. 6
D
Fitting a Wire Cup Brush
Screw the wire cup brush directly onto the spindle without the use of the
spacer and threaded flange.

Prior to Operation

• Install the guard and appropriate disc or wheel. Do not use excessively
worn discs or wheels.
• Be sure the inner and outer flange are mounted correctly. Follow the
instructions given in the Grinding and Cutting Accessory Chart.
L
• Make sure the disc or wheel rotates in the direction of the arrows on the
accessory and the tool.
• Do not use a damaged accessory. Before each use inspect the
accessory such as abrasive wheels for chips and cracks, backing pad
for cracks, tear or excess wear, wire brush for loose or cracked wires.
If power tool or accessory is dropped, inspect for damage or install an
undamaged accessory. After inspecting and installing an accessory,
position yourself and bystanders away from the plane of the rotating
accessory and run the power tool at maximum no-load speed for one
minute. Damaged accessories will normally break apart during this test
time.
• Never use blotters together with bonded abrasive products.
• Do not work with the grinding cup without a suitable guard in place.
• Do not strain the machine so heavily that it comes to a standstill.
After heavily straining the power tool, continue to run it at no-load
for several minutes to cool down the accessory. Do not touch
grinding and cutting discs before they have cooled down. The
discs can become very hot while working.
• Do not use the power tool with a cut-off stand.
OPERATION
Always observe the safety instructions and
WARNING:
applicable regulations.
WARNING: To reduce the risk of serious personal injury,
turn tool off and disconnect tool from power source
before making any adjustments or removing/installing
attachments or accessories. Before reconnecting the tool,
depress and release the trigger switch to ensure that the tool is off.
WARNING:
• Ensure all materials to be ground or cut are secured in
place.
• Secure and support the workpiece. Use clamps or a vice
to hold and support the workpiece to a stable platform.
It is important to clamp and support the workpiece
9