DeWalt DHS790 - ASSEMBLY; FEATURES AND CONTROLS

7
ENGLISH
Unpacking Your Saw
Check the contents of your miter saw carton to make sure that you have received all parts. In
addition to this instruction manual, the carton should contain:
1 DHS790 miter saw
1 Base extension (right)
1 Base extension (left)
May include:
1 DeWALT Corded power supply (excluding N version)
2 60V batteries (excluding N version)
1 Dual port charger (excluding N version)
In bag:
1 Blade wrench
2 Clamps
2 Lock washers
2 Wing nuts
1 Material clamp
1 Dustbag
1 Instruction manual
Intended Use
This miter saw is designed for professional sawingapplications.
DO NOT use under wet conditions or in presence of flammable liquids orgases.
This miter saw is a professional power tool. DO NOT let children come into contact with the tool.
Supervision is required when inexperienced operators use thistool.
Familiarization (Fig. A, E)
Your miter saw is not fully assembled in the carton. Refer to the Assembly section for assembly
instructions. Open the box and lift the saw out by the convenient lifting handle
18
, as shown in
FigureE. Place the saw on a smooth, flat surface such as a workbench, strong table or DeWALT
miter saw stand. Examine FigureA to become familiar with the saw and its various parts. The
section on adjustments will refer to these terms and you must know what and where the
partsare.
Fig. E
18

CAUTION: Pinch Hazard. To reduce the risk of injury, keep thumb underneath the operating
handle
1
when pulling the handle down. The lower guard will move up as the handle
is pulled down which could cause pinching.The handle is placed close to the guard for
specialcuts.
Press down lightly on the operating handle
1
and pull out the lock down pin
17
. Gently release
the downward pressure and hold the arm allowing it to rise to its full height. Use the lock down
pin when carrying the saw from one place to another. Always use the lifting handle
18
or the
hand indentations
28
to transport thesaw.
Transporting the Saw (Fig.A, H)

WARNING: To reduce the risk of serious personal injury, turn tool off and remove
the battery packs or power supply before transporting, making any adjustments,
cleaning, repairing, or removing/installing attachments or accessories. An accidental
start-up can causeinjury.

WARNING: To reduce the risk of serious personal injury, ALWAYS lock the rail lock
knob
22
, miter lock lever
6
, bevel lock knob
26
, lock down pin
17
and fence
adjustment knobs (
53
, Fig.H) before transportingsaw.
In order to conveniently carry the miter saw from place to place, a lifting handle
18
has been
included on the top of the saw arm and hand indentations
28
in thebase.
To transport the saw, lower the arm of the saw and press in the lock down pin
17
to secure
thearm.
Head Lock Down Pin (Fig. A)

WARNING: The lock down pin should be used ONLY when carrying or storing the
saw. NEVER use the lock down pin for any cuttingoperation.
To lock the saw head in the down position, push the head down, push the lock down pin
17
in
and release the saw head. This will hold the saw head safely down for moving the saw from place
to place. To release, press the saw head down and pull the pinout.
ASSEMBLY

WARNING: To reduce the risk of serious personal injury, turn tool off and remove
the battery packs or power supply before transporting, making any adjustments,
cleaning, repairing, or removing/installing attachments or accessories. An accidental
start-up can causeinjury.
NOTE: Your miter saw is fully and accurately adjusted at the factory at the time of manufacture.
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. Take a little time now to follow these
directions carefully to maintain the accuracy of which your saw iscapable.
Assembling the Base Extensions (Fig. F)

WARNING: Base extensions must be assembled to both sides of the saw's base before using
thesaw.
1. Locate the preassembled threaded stud
55
underneath the saw’sbase.
2. The extension
13
should be oriented as shown in the illustration, sliding fully rearward in the
U-shaped supports.
3. Clamp the extension’s rods against the miter saw base by inserting the clamp
56
over the
threaded stud, followed by the washer
57
, and tightening the wing nut
58
. Ensure the
extension is secure by pulling on the extension to verify no movement.
4. Repeat steps 1 through 3 on the other side.
13
Fig. F
56
58
57
55
Bench Mounting (Fig. A)
Mounting holes
5
are provided in all 4 feet to facilitate bench mounting. (Two different-sized
holes are provided to accommodate different sizes of screws. Use either hole, it is not necessary
to use both.) Always mount your saw firmly to a stable surface to prevent movement. To enhance
the tool’s portability, it can be mounted to a piece of 1/2" (12.7 mm) or thicker plywood which
can then be clamped to your work support or moved to other job sites andreclamped.
NOTE: If you elect to mount your saw to a piece of plywood, make sure that the mounting
screws don’t protrude from the bottom of the wood. The plywood must sit flush on the work
support. When clamping the saw to any work surface, clamp only on the clamping bosses where
the mounting screw holes are located. Clamping at any other point will interfere with the proper
operation of thesaw.

CAUTION: To prevent binding and inaccuracy, be sure the mounting surface is not warped
or otherwise uneven. If the saw rocks on the surface, place a thin piece of material under one
saw foot until the saw sits firmly on the mountingsurface.
FEATURES AND CONTROLS

WARNING: To reduce the risk of serious personal injury, turn tool off and remove
the battery packs or power supply before transporting, making any adjustments,
cleaning, repairing, or removing/installing attachments or accessories. An accidental
start-up can causeinjury.
Use of CUTLINE™ LED Worklight (Fig.A)

CAUTION: Do not stare into worklight. Serious eye injury couldresult.
The CUTLINE™ LED Worklight can be turned on by the momentary switch
19
. The light will
automatically turn off within 20 seconds if the saw is not in use. The light is also activated
automatically every time the tool's main trigger
2
ispulled.
To cut through an existing pencil line on a piece of wood, turn on the CUTLINE™ worklight
using the momentary switch
19
(not with the main trigger), then pull down on the operating