Operation Manual

ENGLISH
28
DO NOT use under wet conditions or in presence of
flammable liquids or gases.
These rotary hammers are professional power tools.
DO NOT let children come into contact with the
tool. Supervision is required when inexperienced
operators use this tool.
Soft Start Feature
The soft start feature allows to build up speed slowly,
thus preventing the drill bit from walking off the
intended hole position when starting. The soft start
feature also reduces the immediate torque reaction
transmitted to the gearing and the operator if the
hammer is started with the drill bit in an existing hole.
Torque Limiting Clutch
The torque limiting clutch reduces the maximum
torque reaction transmitted to the operator in case
of jamming of a drill bit. This feature also prevents
the gearing and electric motor from stalling.
The torque limiting clutch has been factory-set and
cannot be adjusted.
Electronic Speed and Impact
Control (fi g. 2)
The electronic speed and impact control (b) offers
the following advantages:
– use of smaller accessories without risk of
breakage
– minimised break-out when chiselling or drilling in
soft or brittle materials
– optimal tool control for precise chiselling
Service Indicator LED (fi g. 2)
The red service indicator LED (c) lights up when the
carbon brushes are nearly worn out to indicate that
the tool needs servicing. After a further 8 hours of
use the motor will automatically be shut off.
The carbon brushes are not user-serviceable.
Take the tool to an authorized DEWALT repair agent.
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 charger is double insulated
in accordance with EN 60745; therefore
no earth wire is required.
WARNING: 115 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
D
EWALT service organization.
Mains Plug Replacement
(U.K. & Ireland Only)
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
An extension cord should not be used unless
absolutely necessary. Use an approved extension
cable suitable for the power input of your charger
(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.
Inserting and Removing SDS Max
®
Accessories (fi g. 3, 4)
This machine uses SDS Max
®
drill bits and chisels
(refer to the inset in fig. 4 for a cross-section of an
SDS Max
®
bit shank).
1. Clean and grease the bit shank.
CAUTION: Only apply a slight amount
of lubricant to the bit shank. Do not
apply lubricant to the machine.