Operation Manual

ENGLISH
27
INTENDED USE
The D25899, D25901 and D25941 heavy-duty
demolition hammers are designed for heavy-duty
demolition, chipping and chasing applications.
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.
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
(fi g. 1)
D25901 ONLY
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.
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.
For 115 V units with a power rating exceeding
1500 W, we recommend to fit a plug to BS4343
standard.
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.
ASSEMBLY AND ADJUSTMENT
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)
D25901
This machine uses SDS Max
®
chisels (refer to the
inset in fig. 4 for a cross-section of a chisel shank).
Only DEWALT recommended accessories should be
used with this product.