ENGLISH
7
1 Keyless chuck (D25144)
1 Instruction manual
  •  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 (fig. 1, 5, 8)
     WARNING: Never modify the power 
tool or any part of it. Damage or 
personal injury could result.
  a. Variable speed switch
  b. Main handle
  c. Forward/Reverse lever
  d. Mode selector
  e. Mode selector button
  f. SDS Plus tool holder
  g. Depth adjustment rod
  h. Side handle
  i. Depth rod button
  j. Sleeve
  k. Dust cover
  l. Date code
  m. Locking collar (D25144)
  n. Keyless chuck (D25134/D25144)
  o. Lock-on button
INTENDED USE
The D25032 heavy-duty rotary hammer has been 
designed for professional drilling, hammerdrilling, and 
screwdriving. The D25033, D25133 and D25144 
heavy-duty rotary hammers have been designed for 
professional drilling, hammerdrilling, screwdriving and 
light chipping. 
DO NOT use under wet conditions or in presence of 
flammable liquids or gases.
These hammerdrills are professional power tools. 
DO NOT let children come into contact with the 
tool. Supervision is required when inexperienced 
operators use this tool.
 • Young children and the infirm. This appliance 
is not intended for use by young children or 
infirm persons without supervision.
  •  This product is not intended for use by persons 
(including children) suffering from diminished 
physical, sensory or mental abilities; lack of 
experience, knowledge or skills unless they are 
supervised by a person responsible for their 
safety. Children should never be left alone with 
this product.
Torque Limiting Clutch
All rotary hammerdrills are equipped with a torque 
limiting clutch that 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.
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 IEC 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 
DeWALT service organisation.
Using an Extension Cable
If an extension cable is required, use an approved 3–
core extension cable suitable for the power input of 
this tool (see technical data).The minimum conductor 
size is 1.5 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.
Selecting the Operating Mode  
(fig. 2)
The tool can be used in the following operating 
modes:
   Rotary drilling: for screwdriving and for 
drilling into steel, wood and plastics