DeWalt DWS778 Original Instructions Manual page 34

EnGLIsh
Removing the Blade
1. Unplug the saw.
2. Insert the 6 mm hex key 28 into the opposite location of the blade
shaft and hold it (Fig. E).
3. Use second hex key 28 as shown in Figure E as spindle lock.
4. Loosen the blade bolt 5 by turning clockwise. Remove the blade bolt
and the outer flange 4 .
5. Press the lower guard lock-up release lever
guard 6 and remove the saw blade
Installing a Blade
1. Unplug the saw.
2. Install the new saw blade onto the shoulder provided on the inner
flange 35 making sure that the teeth at the bottom edge of the blade
are pointing towards the fence (away from the operator).
3. Replace the outer flange 4 , making sure that the location lugs
engaged correctly, one on each side of the motor shaft.
4. Tighten the blade bolt 5 by turning counterclockwise while holding
the 6 mm hex key 28 engaged with your other hand (Fig. E).

WARNING: Be aware the saw blade shall be replaced in the described
way only. Only use saw blades as specified under Technical Data;
Cat. no.: DT4282 is suggested.
Transporting the Saw (Fig. A, B)

WARNING: To reduce the risk of serious personal injury,
ALWAYS lock the rail lock knob, mitre latch, bevel clamp handle, lock
down button and fence lock knobs before transporting saw. Never use
guards for transporting or lift up.
• Before transporting the saw, verify that the cord is disconnected.
• To transport the saw, lower the head and depress the lock down
button 25 .
• Lock the rail lock knob with the saw head in the front position, lock the
mitre arm in the full left mitre angle, slide the fence
inward and lock the fence lock knobs, then lock the bevel clamp
handle 21 with the saw head in the vertical position to make the tool
as compact as possible.
• Always use the base extension handles
ADJUSTMENTS

WARNING: To reduce the risk of injury, turn unit off and
disconnect machine from power source before installing and
removing accessories, before adjusting or changing set-ups
or when making repairs. Be sure the trigger switch is in the OFF
position. An accidental start-up can cause injury.
Your mitre saw was accurately adjusted at the factory. If readjustment
due to shipping and handling or any other reason is required, follow the
steps below to adjust your saw. Once made, these adjustments should
remain accurate.
Adjusting the Rails for Constant Cutting Depth
(Fig. A, B, F, G)
The blade must run at a constant cutting depth along the full length of the
table and must not touch the fixed table at the rear of the slot or at the front
of the rotating arm. To achieve this, the rails
the table when the saw head is fully depressed.
1. Press the lower guard lock up release lever
2. Press the saw head fully to the rear position and measure the height
from the rotating table 12 to the bottom of the outer flange
3. Loosen the rail lock knob 17 (Fig. B).
4. Keeping the saw head fully depressed, pull the head to the end of
its travel.
5. Measure the height indicated in Figure G again. Both values should
be identical.
32
2 to raise the lower blade
7 .
36 are
15 completely
20 to carry the saw.
26 must be perfectly parallel to
2 (Fig. A).
4 (Fig. G).
6. If adjustment is required, proceed as follows (Fig. F):
a. Loosen the locknut 37 in the bracket
extraction nozzle and adjust the screw
small steps.
b. Tighten the locknut 37 .

WARNING: Always check that the blade does not touch the table at
the rear of the slot or at the front of the rotating arm at 90° vertical
and 45° bevel positions. Do not switch on before having checked this!
Adjusting the Fence (Fig. H)
Lift the sliding fence lock lever 40
sliding fence 15 to a position that avoids the blade, then tighten the fence
lock lever by turning clockwise.

WARNING: The guide grooves can become clogged with sawdust. Use
a stick or some low pressure air to clear the guide grooves.
Checking and Adjusting the Blade to the Fence
(Fig. A, B, I, J)
1. Slacken the mitre latch 11 .
2. Place your thumb on the mitre arm
to release the rotating table/mitre arm
3. Swing the mitre arm until the latch locates it at the 0° mitre position.
4. Pull down the head and lock it in this position using the lock-down
button 25 .
5. Check that the two 0° markings
just visible.
6. Place a square 42 against the left side of the fence

WARNING: Do not touch the tips of the blade teeth with the square.
7. If adjustment is required, proceed as follows:
a. Loosen the mitre scale screws
arm assembly left or right until the blade is at 90° to the fence as
measured with the square 42
b. Retighten the mitre scale screws
Checking and Adjusting the Blade to the Table
(Fig. B, K–M)
1. Loosen the bevel clamp handle
2. Press the saw head to the right to ensure it is fully vertical and tighten
the bevel clamp handle.
3. Place a square 42 on the table and up against the saw blade

WARNING: Do not touch the tips of the blade teeth with the square.
4. If adjustment is required, proceed as follows:
a. Loosen the bevel clamp handle
adjustment stop screw 43 in or out with the hex wrench (as shown
in Fig. K) until the blade is at 90° to the table as measured with
the square.
b. If the bevel pointer 46 does not indicate zero on the bevel scale
loosen the bevel scale screws
scale as necessary.
Checking and Adjusting the Bevel Angle (Fig. K, M)
The bevel override allows the maximum bevel angle to be set at 45° or 48°
as required.
- Left = 45°
- Right = 48°
1. Make sure the override lever 44
2. Loosen the bevel clamp handle
and move the saw head to the left.
3. This is the 45° bevel position.
38 under the upper dust
39 as required, proceeding in
counterclockwise to loosen. Move the
10 and squeeze the mitre latch
12 .
41 on the mitre scale 13 are
15 and blade
14 (Fig. I) and move the scale/mitre
(Fig. J).
14 .
21 (Fig. K).
7 (Fig. L).
21 and turn the vertical position
45 that secure the scale and move the
is located in the left position.
21 by pulling it outward then down
11
7 .
24 ,