DeWalt DHS780 - Assembly and Adjustments; Pre-Operation Safety for Assembly; Assembly Procedures; Tool Operations

13
ENGLISH
2. Using a hex wrench, attach the screw
65
through the washer
66
, through the base
extension
14
, and into the holes on thebase.
3. Ensure the extension is secure by pulling on the extension to verify nomovement.
4. Repeat steps 1 through 3 on the otherside.
NOTE: Make sure the extensions are level with the work surface so that the workpiece rests
evenly. A straight workpiece should have no gap between it and the baseextensions.
Installing and Removing the Battery Packs from the Tool (Fig.C1)
NOTE: For best results, make sure your battery packs are fullycharged.
To install the battery packs
21
into the tool, align the battery packs with the rails on the side
of the motor housing and slide them in until they are firmly seated in the tool and ensure that
they do not disengage. Insert the dust cover
40
into the corded power supply receptacle
38
in between thebatteries.
NOTICE: Keep the dust cover in place whenever the corded power supply is not
inuse.
To remove the battery packs from the tool, press the battery release button
31
and firmly
pull the battery packs out. Insert them into the charger as described in the charger section of
thismanual.
Fuel Gauge Battery Packs (Fig. C2)
Some
DeWALT
battery packs include a fuel gauge which consists of three green LED lights that
indicate the level of charge remaining in the batterypack.
To actuate the fuel gauge, press and hold the fuel gauge button. A combination of the three
green LED lights will illuminate designating the level of charge left. When the level of charge
in the battery is below the usable limit, the fuel gauge will not illuminate and the battery will
need to berecharged.
NOTE: The fuel gauge is only an indication of the charge left on the battery pack. It does
not indicate tool functionality and is subject to variation based on product components,
temperature and end-userapplication.
Installing and Removing the Corded Power Supply into and from
Tool (Fig.D–F)
Before inserting the corded power supply into your tool, remove the end of the dust cover
40
from the tool's corded power supply receptacle
38
. Pull the dust cover away from the tool’s
corded power supply receptacle so that it does not interfere with insertion of the corded
power supply. Inspect the corded power supply receptacle for debris. Debris inside the
receptacle can prevent the corded power supply from fully seating. If debris is present, clean it
using low pressure air. Refer to Cleaning the Corded Power SupplyReceptacle.
NOTICE: The corded power supply is for AC power sources only when used with this tool.
Use with DC power sources could result in damage to thetool.
To install the corded power supply into your tool:
1. With the corded power supply unplugged, align its AC connector with the tool's corded
power supply receptacle
38
then snap intoplace.
2. Ensure that it is fully seated in the tool and does notdisengage.
3. Attach the dust cover
40
to the dust cover holder (
41
, Fig.E) in the corded powersupply.
4. Secure the cord clip
42
into the tool's cord clip holder (
43
, Fig.F). Firmly press the clip
into theholder.
5. With the tool turned off, plug the corded power supply into a standard 230 V household
electric power outlet. UK 115V units should be plugged into a 115V transformer. Do not
attempt to use the corded power supply on any othervoltage.
6. Use the tool according to the tool instructions, making sure the cord is located so that it
will not be stepped on, tripped over, or otherwise subjected to damage orstress.
7. To remove the corded power supply from the tool, first unplug the corded power supply
from the outlet, then press the release button
39
and firmly pull the corded power supply
out of the tool. Firmly press the end of the dust cover
40
into the tool’s corded power
supply receptacle
38
.
Changing or Installing a New Saw Blade
Removing the Blade (Fig. A, H–K)

WARNING: To reduce the risk of injury, wear gloves when handling the sawblade.

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. Be sure
the trigger switch is in the OFF position. An accidental start-up can causeinjury.
• Never depress the spindle lock button while the blade is under power orcoasting.
• Do not cut light alloy and ferrous metal (containing iron or steel) or masonry or fibre
cement product with this mitresaw.
DHS780 FIG. A, H, J, K)
1. Disconnect the saw from the power supply or removebatteries.
2. Raise the arm to the upper position and raise the lower guard
1
as far aspossible.
3. Depress the spindle lock button
49
while carefully rotating the saw blade by hand until
the lockengages.
4. Keeping the button depressed, use the other hand and the wrench
26
provided to loosen
the blade screw
44
. (Turn clockwise, left-hand threads.)
5. Remove the blade screw
44
, outer clamp washer
45
, adapter
46
and blade
47
. The
inner clamp washer
48
may be left on thespindle.
NOTE: For blades with a blade hole of 15.88 mm, the 25.4 mm blade adapteris notused.
Description (Fig. A, D)

WARNING: Never modify the power tool or any part of it. Damage or personal injury
couldresult.
1
Lower guard
2
Operating handle
3
Carrying handle
4
Trigger switch
5
Trigger lock-off button
6
Bench mounting holes
7
Mitre lock handle
8
Mitre release button
9
Mitre detent override lever
10
Kerf plate
11
Mitre scale pointer
12
Mitre scale
13
Mitre scale screws
14
Base extension handles
15
Fence
16
Bevel scale
17
Bevel scale pointer
18
Lock down pin
19
Slide lock lever
20
XPS™ on/off switch
21
Battery packs
22
Rails
23
Rail lock knob
24
Rail adjustment screw
25
Dust port
26
Hex wrench
27
Bevel lock knob
28
Clamp hole
29
Bevel stop override knob
30
Date code (Fig. D)
31
Battery release buttons
32
Wing nut
33
Depth adjustment screw
34
Grooving stop
35
Fence adustment knob
36
Padlock hole
37
Fence lanyard
Intended Use
Your
DeWALT
DWS780 mitre saw has been designed for professional cutting of wood, wood
products and plastics. When using the appropriate saw blades, sawing aluminium is also
possible. It performs the sawing operations of cross-cutting, bevelling and mitring easily,
accurately andsafely.
This unit is designed for use with a nominal blade diameter 305 mm carbide tipblade.
DO NOT use under wet conditions or in the presence of flammable liquids orgases.
This mitre saw is professional power tools. DO NOT let children come into contact with the
tool. Supervision is required when inexperienced operators use thistool.

WARNING! Do not use the machine for purposes other thanintended.
• Young children and the infirm. This appliance is not intended for use by young children
or infirm persons withoutsupervision.
• This product is not intended for use by persons (including children) suffering from
diminished physical, sensory or mental abilities; lack of experience, knowledge or skills
unless they are supervised by a person responsible for their safety. Children should never
be left alone with thisproduct.
ASSEMBLY AND ADJUSTMENTS

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: Use only
DeWALT
battery packs, corded power supply andchargers.
Unpacking (Fig. A, G)
1. Open the box and lift the saw out by the con venient carrying handle
3
, as shown in
FigureG.
2. Place the saw on a smooth, flatsurface.
3. Release the rail lock knob
23
, and push the saw head back to lock it in the rearposition.
4. Press down lightly on the operating handle
2
and pull out the lock down pin
18
.
5. Gently release the downward pressure and hold the operating handle, allowing it to rise to
its fullheight.
Bench Mounting (Fig. A, GG)
Holes
6
are provided in all four feet to facilitate bench mounting. Two different-sized holes are
provided to accommodate different sizes of screws or bolts. 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 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 or bolts 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.
Assembling the Base Extensions (Fig. II)

WARNING: Base extensions must be assembled to both sides of the saw's base
before using thesaw.

WARNING: Be sure to adjust the base extensions using the mounting slots so they
are level with the saw'sbase.
1. Locate the holes above the hand indentations on the side of thebase.