Assembly And Adjustments - DeWalt D25911 Manual

Date Code Position (Fig. A)
The production date code
by a 2‑digit week and is extended by a 2‑digit factory code.
Description (Fig. A)

WARNING: Never modify the power tool or any part of it.
Damage or personal injury could result.
On/off switch
1
Main handle
2
Chisel position index collar
3
Tool holder/sleeve
4
Bail/loop style auxiliary handle
5
Screw for handle mounting
6
Speed control dial
7
Tool Tag mounting holes
8
Date code
9
Yellow service indicator LED
10
Intended Use
Your heavy‑duty breaker is designed for breaking or
demolishing concrete, masonry, stone and asphalt.
DO nOT use under wet conditions or in the presence of
flammable liquids or gases.
Your heavy‑duty breaker is a professional power tool.
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.

ASSEMBLY AND ADJUSTMENTS


WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect tool from power
source before making any adjustments or removing/
installing attachments or accessories. An accidental
start‑up can cause injury.
Bail/Loop Style Auxiliary Handle (Fig. B)

WARNING: To reduce the risk of personal injury, ALWAYS
operate the tool with the bail/loop style auxiliary handle
properly installed and securely tightened. Failure to do so
may result in the bail/loop style auxiliary handle slipping
during tool operation and subsequent loss of control. Hold
tool with both hands to maximize control.
The bail/loop style auxiliary handle
the gear case and may be rotated 360˚ to permit right‑ or
left‑hand use.
consists of a 4‑digit year followed
9
clamps to the front of
5
Mounting the Bail/Loop Style Auxiliary Handle
(Fig. B)
1. Widen the ring opening
auxiliary handle 5 by rotating the screw for handle
mounting counterclockwise.
6
2. Slide the assembly onto the nose of the tool through
the ring opening 11 and onto the chisel position index
collar , past the chisel holder and sleeve.
3
3. Rotate the bail/loop style auxiliary handle to the
desired position.
4. Lock the bail/loop style auxiliary handle in place by securely
tightening the screw for handle mounting
clockwise so that the assembly will not rotate.
Chisel and Tool Holder

WARNING: Burn hazard. ALWAYS wear gloves when
changing chisels. Accessible metal parts on the tool and
chisels may get extremely hot during operation. Small bits
of broken material may damage bare hands.
Inserting and Removing SDS max® Accessories
(Fig. C)
This machine uses SDS max® chisels (refer to the inset in
Figure C for a cross‑section of an SDS max® chisel shank).
1. Clean the chisel shank.

WARNING: Do not apply lubricant to the machine.
2. Pull back the locking sleeve
3. Release the locking sleeve and turn the chisel slightly until
the locking sleeve snaps into position.
4. Pull on the chisel to check if it is properly locked. The
hammering function requires the chisel to be able to move
axially several centimetres when locked in the chisel holder.
5. To remove a chisel pull back the locking sleeve
the chisel out of the tool holder
Indexing the Chisel Position (Fig. D)
The chisel can be indexed and locked into 12 different positions.
1. Insert the chisel as described above.
2. Rotate the chisel position index collar
the arrow until the chisel is in the desired position.
Setting the Electronic Impact Energy Control
Dial (Fig. A)
Turn the dial 7 to the desired level. The higher the number, the
greater the impact energy. With dial settings from 1 (low) to
7 (full power) the tool is extremely versatile and adaptable for
many different applications.
The required setting is a matter of experience, for example:
• When chiseling soft, brittle materials or when minimum
break‑out is required, set the dial to 1 or 2 (low);
• When breaking harder materials, set the dial to
7 (full power).
11 of the bail/loop style
6 , rotating it
and insert the chisel shank.
4
and pull
4
4 .
3 in the direction of
English
7