DeWalt DWS778 - OPERATION; General Use and Safety; Saw Cut Procedures; Straight, Sliding, Mitre, and Bevel Cuts

11
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
2
to raise the lower blade
guard
6
and remove the saw blade
7
.
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
36
are
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
15
completely
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
20
to carry thesaw.
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
26
must be perfectly parallel to
the table when the saw head is fullydepressed.
1. Press the lower guard lock up release lever
2
(Fig.A).
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
4
(Fig.G).
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.
6. If adjustment is required, proceed as follows (Fig. F):
a. Loosen the locknut
37
in the bracket
38
under the upper dust
extraction nozzle and adjust the screw
39
as required, proceeding in
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
counterclockwise to loosen. Move the
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
10
and squeeze the mitre latch
11
to release the rotating table/mitre arm
12
.
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
41
on the mitre scale
13
are
justvisible.
6. Place a square
42
against the left side of the fence
15
and blade
7
.

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
14
(Fig.I) and move the scale/mitre
arm assembly left or right until the blade is at 90° to the fence as
measured with the square
42
(Fig.J).
b. Retighten the mitre scale screws
14
.
Checking and Adjusting the Blade to the Table
(Fig.B,K–M)
1. Loosen the bevel clamp handle
21
(Fig.K).
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
7
(Fig.L).

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
21
and turn the vertical position
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
24
,
loosen the bevel scale screws
45
that secure the scale and move the
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
is located in the leftposition.
2. Loosen the bevel clamp handle
21
by pulling it outward then down
and move the saw head to theleft.
3. This is the 45° bevelposition.