Technical data

ENGLISH
9
Package contents
The package contains:
1 Demolition hammer
1 Side handle
1 Pointed chisel (D25901, D25941)
1 Plastic case
1 Instruction manual
1 Exploded drawing
Check for damage to the tool, parts or
accessories which may have occurred during
transport.
Take the time to thoroughly read and
understand this manual prior to operation.
Description (fi g. 1)
Your DEWALT demolition hammer has been
designed for professional applications.
a. On/off switch
b. Rear handle
c. Electronic impact energy control dial
d. Chisel position index collar
e. Tool holder/sleeve
f. Side handle
INTENDED USE
The D25899, D25901 and D25941 heavy-duty
demolition hammers are designed for heavy duty
demolition, chipping and chasing applications in
concrete, brick, stone and other masonry materials.
DO NOT use under wet conditions or in presence of
flammable liquids or gases.
These heavy-duty demolition hammers are
professional power tools. DO NOT let children come
into contact with the tool. Supervision is required
when inexperienced operators use this tool.
Residual risks
In spite of the application of the relevant
safety regulations and the implementation of
safety devices, certain residual risks cannot be
avoided.
These are:
– Impairment of hearing.
– Risk of dust inhalation.
– Risk of personal injury due to prolonged use.
– Risk of burns due to accessories becoming
hot during operation.
Soft start feature – D25901, D25941
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 – D25901,
D25941
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 –
D25901 only (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: NEVER use a light socket.
NEVER connect the live (L) or
neutral (N) wires to the earth
pin marked E or
.
WARNING: 115 V units have to
be operated via a fail-safe isolating
transformer with an earth screen
between the primary and secondary
winding.
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 1.5 mm
2
. When
using a cable reel, always unwind the cable
completely. Also refer to the following table.