DeWalt D28730 Manual page 10

English
To best deflect sparks away from surrounding persons and
materials, loosen the spark deflector screw
deflector 3 and then retighten screw. Do not allow cordset to
come into contact with deflector or sparks as damage to cordset
may occur.
Trigger Switch (Fig. A)
To start the tool, depress the trigger switch 13 . To turn the tool
off, release the trigger switch. Keep hands and material from
wheel until it has coasted to a stop.To prevent unauthorized use
of tool, install a standard padlock (not included) into the padlock
hole 14 located in the trigger. There is provision for locking the
switch on.
Material Clamping and Supporting (Fig. B, C)
• Angles are best clamped and cut with both legs resting
against base.
• A spacer block 29 slightly narrower than the workpiece
can be used to increase wheel utilization (Fig. B).
• Long workpieces must be supported by a block
be level with top of base (Fig. C). The cut-off end
be free to fall downward to avoid wheel binding.
Vise Operation (Fig. A, D)
The vise has a quick travel feature. To release the vise
it is clamped tightly, turn the crank
two times to remove clamping pressure. Lift the vise lever
up. Pull crank assembly out as far as desired. The vise may
be shoved into work without cranking. Lower vise lever then
tighten vise on work by using crank.
Fence Operation (Fig. A, D, E)

WARNING: Turn off and unplug the tool before
making any adjustments or removing or installing
attachments or accessories. Be sure the trigger
switch is in the OFF position.
The fence 5 can be adjusted two ways: to change desired
cutting angle and to change spacing between the fence
and vise.
To Change the Desired Cutting Angle
Use the 8 mm hex key 7 provided to loosen (do not remove)
the two fence bolts 15 . Align the desired angle indicator line
with the slot line 28 in the base
bolts before use. For more accurate square cuts, disconnect the
power supply, loosen the two fence bolts, push arm down until
wheel extends into base. Place a square against the wheel and
adjust fence against the square. Securely tighten both fence
bolts before use. When making a miter cut, the vise
clamp securely, depending on the thickness of the workpiece
and the miter angle. Other aids (such as spring, bar or C-clamps)
will be necessary to secure the workpiece to the fence when
making these cuts.
8
2 , adjust the spark
31 so it will
32 should
6 when
8 counterclockwise one or
9
4 . Securely tighten both fence
6 may not
Removal and Installation of Wheels
(Fig. F, G)

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. Do not make
any adjustment while the wheel is in motion. Do not
make any adjustment while chop saw is plugged into
power supply.

WARNING: Always use gloves when handling wheels.

WARNING: Do not impact the wheel, and do not use a
wheel that has been dropped or impacted. Do not use a
chipped, deformed or damaged wheel.
1. Push in spindle lock
wheel lock lever engages slot in inside flange
30
wheel. Loosen the bolt
of the abrasive wheel with the 8 mm hex key
right-hand thread.
2. Remove the bolt
old wheel 10 .
3. Make sure flange surfaces are clean and flat. Install the new
abrasive wheel by reversing the above steps.
4. For safe operation, securely tighten bolt
the abrasive wheel
flanges 23 . Do not overtighten bolt

WARNING: Check the work surface that the chop saw
rests on when replacing with a new abrasive wheel. It
is possible that the wheel may contact ANY ITEMS OR
STRUCTURE THAT EXTENDS ABOVE work surface
(under the base) when the arm is fully lowered.
Soft Start Feature (D28730D only)
The soft start feature (Time Delay Relay--TDR) allows a slow
speed run-up over 300 ms to avoid an initial jerk when starting.
This feature is also particularly useful when the installed fuse
value is too low or not of inert character.
Operation Tips for More Accurate Cuts
• Allow the wheel to do the cutting. Excessive force will cause
the wheel to glaze reducing cutting efficiency and/or to
deflect causing inaccurate cuts.
• Properly adjust fence angle.
• Make sure material is laying flat across base.
• Properly clamp material to avoid movement and vibration.
Motor Brush Inspection and Replacement
(Fig. H, I)
BE SURE TOOL IS UNPLUGGED BEFORE INSPECTING BRUSHES.
Brushes should be regularly inspected for wear. To inspect
brushes, unscrew the two end cap screws
end cap 25 . To remove each brush
wire 27 terminal connection. Then carefully back the brush
spring out of the brush box and remove brush. Brushes should
12 and rotate wheel 10
21 counterclockwise in the center
21 , washer 22 , outside flange
21
10 in between inner 20
21 .
24 and remove the
26 , first unplug the shunt
by hand until
20 to lock
7 . Bolt has
23 and
to firmly secure
and outer