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7
Soft Start Feature
The soft start feature allows the impact rate to build
up more slowly, thus preventing the chisel or point
from “bouncing” around on the masonry when
starting up.
Active Vibration Control
The active vibration control neutralises rebound
vibration from the hammer mechanism. Lowering
hand and arm vibration, it allows more comfortable
use for longer periods of time and extends the life of
the unit.
Electronic Impact Energy Control
(fi g. 1)
The electronic impact energy control (c) offers the
following advantages:
• use of smaller accessories without risk of
breakage
• minimised break-out when chiselling soft or
brittle materials
• optimal tool control for precise chiselling
Electrical Safety
The electric motor has been designed for one
voltage only. Always check that the power supply
corresponds to the voltage on the rating plate.
Your DEWALT tool is double insulated in
accordance with EN 60745; therefore no
earth wire is required.
WARNING: 120 V units have to
be operated via a fail-safe isolating
transformer with an earth screen
between the primary and secondary
winding.
If the supply cord is damaged, it must be replaced
by a specially prepared cord available through the
DEWALT service organisation.
Mains Plug Replacement
(Middle East and Africa)
If a new mains plug needs to be fitted:
• Safely dispose of the old plug.
• Connect the brown lead to the live terminal in
the plug.
• Connect the blue lead to the neutral terminal.
WARNING: No connection is to be
made to the earth terminal.
Follow the fitting instructions supplied with good
quality plugs. Recommended fuse: 13 A.
Using an Extension Cable
If an extension cable is required, use an approved
extension cable suitable for the power input of this
tool (see Technical Data). The minimum conductor
size is 1 mm
2
; the maximum length is 30 m.
When using a cable reel, always unwind the cable
completely.
ASSEMBLY AND 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.
WARNING: Always wear gloves when
changing accessories. The exposed
metal parts on the tool and accessory
may become extremly hot during
operation.
Inserting and Removing SDS Max
®
Accessories (fi g. 3, 4)
This machine uses SDS Max
®
chisels (refer to the
inset in Figure 4 for a cross-section of a chisel
shank).
Only DEWALT recommended accessories should be
used with this product.
1. Clean the chisel shank.
WARNING: Do not apply lubricant to
the machine.
2. Insert the chisel shank into the tool holder/
sleeve (e). Press and turn the chisel slightly until
the sleeve snaps into position.
3. Pull on the chisel to check if it is properly
locked. The hammering function requires
the chisel to be able to move axially several
centimetres when locked in the tool holder.
4. To remove a chisel, pull back the tool holder/
sleeve (e) and pull the chisel out of the tool
holder.
Indexing the Chisel Position (fi g. 5)
The chisel can be indexed and locked into
12 different positions.