Intended Use - DeWalt DWP849 Guide D'utilisation

Your risk from these exposures varies, depending on how often you do this type of work. To
reduce your exposure to these chemicals: work in a well ventilated area, and work with approved
safety equipment, such as those dust masks that are specially designed to filter out microscopic
particles.
• Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling and
other construction activities. Wear protective clothing and wash exposed areas with
soap and water. Allowing dust to get into your mouth, eyes, or lay on the skin may promote
absorption of harmful chemicals.
WARNING: Use of this tool can generate and/or disperse dust, which may cause serious and
permanent respiratory or other injury. Always use NIOSH/OSHA approved respiratory protection
appropriate for the dust exposure. Direct particles away from face and body.
CAUTION: Use extra care when working into a corner because a sudden, sharp movement
of the polisher may be experienced when the wheel or other accessory contacts a secondary
surface or a surface edge.
• The label on your tool may include the following symbols. The symbols and their definitions are
as follows:
V ......................volts
Hz ....................hertz
min ..................minutes
...............direct current
....................Class I Construction
........................(grounded)
....................Class II Construction
........................(double insulated)
.../min .............per minute
SAVE THESE INSTRUCTIONS
Motor
Be sure your power supply agrees with the nameplate marking. Voltage decrease of more than
10% will cause loss of power and overheating. D
operate, check power supply.
COMPONENTS (Fig. 1)
WARNING: Never modify the power tool or any part of it. Damage or personal injury could
result.
A. Speed control wheel
B. Cushion tool rest (DWP849 only)
C. Variable speed trigger switch
D. Brush inspection cap
E. Spindle lock button
F. Auxiliary handle

INTENDED USE

The DWP849 and DWP849X heavy-duty polishers are designed for polishing painted or unfinished
metal, fiberglass, and composite surfaces in professional applications. Common examples of use
include but are not limited to: auto/marine/RV/motorcycle detailing and finish correction, boat
construction and repair, and metal or concrete finishing.
Do not use in the presence of flammable liquids or gases. Do not let children come into contact
with the tool. Supervision is required when inexperienced operators use this tool.
Auxiliary Handle (Fig. 1)
An auxiliary handle (F) is furnished with your tool and can be installed on either side of the gear
case. This handle should be used at all times to maintain complete control of the tool.
A bale handle (H) is also provided with the DWP849X and can be used in place of the auxiliary
handle.
Variable Speed Trigger Switch (Fig. 1)
These tools are equipped with a variable speed trigger switch that permits speed control from 0
to 3500 RPM. To turn the tool on, squeeze the trigger switch (C) shown in Figure 1 until the tool
starts to run. The farther you depress the trigger, the faster it will operate. Releasing the trigger
turns the tool off.
Use lower speeds for applying liquid waxes and polishes and higher speeds for removing dried
liquid. Use the highest speed (fully depress trigger) for buffing the car to a final lustre.
The tool can be locked on for continuous use by squeezing the trigger switch fully and depressing
the lock button (G) shown in Figure 1. Hold the lock button in as you gently release the trigger
switch. The tool will continue to run. To turn the tool off from a locked-on position, squeeze and
release the trigger switch once. Do not unplug the tool with the switch in the locked-on condition.
Make sure the tool is not locked on when plugging in.
The variable speed trigger switch (C) has a no-volt release function. In the event of a power outage
or other unexpected shut down, the trigger switch needs to be cycled (depress the trigger switch,
release, then depress again) to restart the tool. Do not unplug the tool with the trigger switch in the
locked-on condition. Make sure the tool is not locked on when plugging in. If the tool is plugged
back in with the trigger switch in the locked-on position, the tool will not run until the trigger switch
(C) is cycled as described above.
NOTE: The trigger switch can only be locked on with the tool running at the maximum RPM
designated by the speed control wheel (A).
Speed Control Wheel (Fig. 1)
The maximum speed of your tool can be changed by rotating the speed control wheel (A) to the
desired setting. The wheel incorporates detents to prevent inadvertent wheel movement and
to facilitate speed selection. For added versatility, the trigger switch may be locked in its full on
position and tool speed changed by means of the speed control wheel (A) alone.
The electronic speed control not only lets you select the speed to suit the job, but also helps to
maintain that speed as you load the tool by pressing down. It's this feature, coupled with the
variable speed trigger switch, that make this tool such a value.
The speed control wheel (A) can be set for any speed between 600 and 3500 RPM and the
variable speed switch will then control tool speed from zero to the wheel setting. For example: A
control wheel setting of 2200 RPM will allow the variable speed switch to operate the tool between
zero and 2200 RPM, depending on how far the trigger switch is depressed. A wheel setting of 600
RPM would allow the switch to operate the tool from zero to 600 RPM.
The electronic speed control feature comes into play whenever the trigger switch is fully depressed
and the tool is running at the selected speed determined by the setting of the control wheel. As
you load the tool by pushing it down on the work surface, (with the trigger fully depressed) the
electronic circuit inside the tool will compensate for the loading and maintain the selected speed.
If the speed selected by the control wheel is 2200 RPM, as in the example above, the tool will
maintain 2200 RPM, as it is loaded.
It is important to remember two things about electronic speed control:
1. The electronic speed control operates only when the trigger switch (C) is fully depressed.
2. The effect of electronic speed control is much easier to observe at lower speed settings
(2600 RPM and below), than at high speeds. As the tool approaches 3000 RPM, the effect is
considerably less dramatic.
Keep in mind that, with a conventional polisher running at a typical no-load speed of 2400 RPM,
the tool slows down to about 2000 RPM under a polishing load. Your DWP849 or DWP849X will
continue to run at 2400 RPM (or any speed you select with the control wheel) as a load is applied.
Since it doesn't slow down, the speed may be greater than you're used to, so some extra caution
should be observed until you get the "feel" of your polisher. If you feel the speed is too great, you
can, of course, slow the tool down with either the trigger switch or the control wheel.
Spindle Lock Button (Fig. 1)
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. Before reconnecting the tool, depress and release the
trigger switch to ensure that the tool is off.
In order to prevent the spindle of the tool from rotating while installing or removing accessories, a
spindle lock button (E) has been provided in the gear head of the machine. To lock the spindle,
depress and hold the lock button. NEVER DEPRESS THE SPINDLE LOCK BUTTON WITH THE
TOOL RUNNING OR COASTING.
Wool Ingestion Shields (Fig. 1, 2)
The wool ingestion shields (K) are designed to reduce the amount of wool, dust, and debris that
gets ingested by the motor during normal use. The goal of the ingestion shields is to improve
durability as compared to a unit without the ingestion shields.
Each ingestion shield can be easily removed for cleaning by removing the mounting screw (L),
followed by sliding the shield back towards the trigger end of the tool and then lifting it off.
The wool ingestion shields can be cleaned with soap and water and a soft bristle brush in the event
they get clogged with polish and debris. Clean the shields as soon as you start to see buildup on
the outside.
Your tool may come with a set of wool ingestion shields. The wool ingestion shields are available
at extra cost from your local dealer or authorized service center.
Soft Rubber Gear Case Cover (Fig. 1)
The soft rubber gear case cover (J) is designed to eliminate metal gear case scuffs on painted or
polished surfaces.
The soft rubber gear case cover can be removed if required. To take off the cover, remove the
three mounting screws and lift the cover over the gear case.
Your tool may come with a soft rubber gear case cover. The soft rubber gear case cover is
available at extra cost from your local dealer or authorized service center.
OPERATION
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. Before reconnecting the tool, depress and release the
trigger switch to ensure that the tool is off.
Polishing pads with a diameter of 6", 7" or 9" (15.2, 17.8 or 22.9 cm) may be used with the
DWP849 and DWP849X.
A ................amperes
W ...............watts
.............alternating current
.............alternating or direct current
n o ..............no-load speed
...............earthing terminal
..............safety alert symbol
BPM ...........beats per minute
RPM ...........revolutions per minute
WALT tools are factory tested; if this tool does not
E
G. Trigger locking button
H. Bale handle
I. Spindle
J. Soft rubber gear case cover
K. Wool ingestion shield
FIG. 1
F
B
E
DWP849
I
H
E
DWP849X
J
I
FIG. 2
FIG. 3A
DWP849
M
N
O
I
E
FIG. 4
Attaching and Removing Polishing Pads (Fig. 3)
WARNING: To reduce the risk of serious personal injury, do not allow any loose portion of the
polishing bonnet or its attachment strings to spin freely. Tuck away or trim any loose attachment
strings. Loose and spinning attachment strings can entangle your fingers or snag on the workpiece.
NOTE: Both the DWP849 and the DWP849X may use either type of polishing pad assembly
described below.
TO ATTACH POLISHING PAD WITH RUBBER BACKING PAD (FIG. 3A)
1. To attach polishing pad (N), push the hub of the clamp washer (M) through the hole in the
center of the polishing pad as far as it will go.
2. Engage the hexagonal hole in the backing pad (O). Holding the three pieces firmly together,
place the assembly on the tool spindle (I).
3. Hold the spindle lock button (E) while turning the pads clockwise to thread them completely on
the spindle.
TO ATTACH POLISHING PAD WITH HOOK AND LOOP BACKING PAD (FIG. 3B)
1. Attach hook and loop foam or wool pad (P) to hook and loop backing pad (Q), being careful to
center the backing pad with the foam or wool pad.
2. Screw backing pad (Q) onto spindle (I), while depressing spindle lock button (E).
TO REMOVE PADS
Turn them by hand in the opposite direction from normal rotation to allow lock button to engage
spindle, then unscrew pads in normal direction for right-hand thread.
Polishing (Fig. 4)
These instructions and suggestions are intended to familiarize new operators in overall general
operation of power polishing. You will develop your own techniques which will make the job easier
and faster as you learn power polishing.
• You should use utmost care when power polishing around or over sharp objects and contours
of the car body. It is very important to use the correct pressure while polishing various sections
of an automobile body. For example, light pressure should be applied when polishing over
sharp edges of body panels, or over edges of the rain gutter along the top.
• Since everyone does not use the same type of power polish, we recommend you clean and
polish a test section on a flat area of the car first. From this test section, you can judge the
strength or cleaning action of your power polish.
• Remember, all power polish is not the same. Different brands will react differently on various
painted surfaces. Also, you are now using a power polisher with power polish. This is entirely
different from any hand application which you may have done before. Wash the car before
power polishing it. Washing will remove loose dirt, scum, road salt, etc. which could act as an
abrasive and damage paint. Loose dirt, etc. will also clog the polishing pad and you will have to
clean it more often.
• Without turning the tool on, grasp the handles of the tool and pick it up (Fig. 4). Keep the
tool away from your body and depress the trigger switch. Make sure you have a firm grip on
the handles and operate the tool freely without forced effort or unnecessary pressure. The
side handle can be easily changed to either side of the tool for left-handed or right-handed
operation.
NOTE: The high speed rubbing action of the polishing bonnet upon the surface of an automobile
can build a static charge on the metal portions of this tool. This can result in a sensation of a very
short mild electric shock when the metal area of the tool is touched, and will be more noticeable
A
G
E
C
D
A
A
G
E
D
C
K
A
K
L
FIG. 3B
P
DWP849X
Q
I
E
B
E