DeWalt D25901, Manual

10

ENGLISH

• 

when breaking harder materials, set the dial to 
«7» (full power).

Fitting and adjusting the side handle 

(fig. 7)

The side handle (f) can be mounted on the front of 
the machine to suit both RH- and LH-users.

WARNING:

 Always operate the machine  

with the side handle properly mounted.

1. Unscrew the side handle clamp knob (p).
2. Slide the side handle assembly onto the  

machine locating the steel ring (h) in the  
mounting area (X). The correct position of the 
side handle is between head and middle of the 
tube.

3. Adjust the side handle (f) to the desired angle.
4. Slide and rotate the side handle to the desired 

position.

5. Lock the side handle in place by tightening the 

clamp knob (p).

Instructions for use

WARNING:
• 

 Always observe the safety instructions 
and applicable regulations.

• 

 Be aware of the location of pipework and 
wiring.

• 

 Apply a pressure of approx. 20 - 80 kg  
to the tool. Excessive force does not 
speed up chiselling but decreases tool 
performance and may shorten tool life.

Switching on and off (fig. 1)

Switching on: set the on/off switch (a) to position 1. 
Switching off: set the on/off switch (a) to position 0.

Demolition, chasing and channelling 

(fig. 1)

1. Select the appropriate chisel, and clean and 

grease its shank.

2. Insert the chisel and check whether it is  

properly locked.

3. Set the desired impact energy level.
4. Fit and adjust the side handle (f) and make sure 

it is firmly tightened.

5. Hold the tool at both handles (b, f) and switch 

on. The tool now runs in continuous operation.

6. Always switch off the tool when work is finished 

and before unplugging.

Various types of chisels are available as an option.
Only D

e

WALT recommended accessories should be 

used with this product.

MAINTENANCE

Your D

e

WALT power tool has been designed to 

operate over a long period of time with a minimum 
of maintenance. Continuous satisfactory operation 
depends upon proper tool care and regular cleaning

• 

This machine is not user-serviceable. Take the 
tool to an authorised D

e

WALT repair agent after 

approximately 100 hours of use. If problems 
occur before this time contact an authorised 
D

e

WALT repair agent.

Accessory maintenance (fig. 8)

Accessory maintenance at the right time guarantees 
optimal results in application and a long and efficient 
accessory life.
Grind the chisels on grinding discs. Refer to figure 8 
for the appropriate angles of the following chisels:

spade-shaped chisel (i) 
cold chisel (j) 
pointed chisel (k) 
U-shaped chisel (l) 
hollow chisel (m) 
mortar chisel (n) 
toothed chisel (o)

WARNING: 

These chisels can be 

reground only a limited number of times. 
If in doubt, contact your dealer for 
recommendations.

WARNING:

 Ensure that the cutting edge 

does not show discolouration caused by 
too much pressure. This may impair the 
hardness of the accessory.