Use and Care Manual

ENGLISH
34
Repairs
The charger and battery pack are notserviceable.

WARNING: To assure product SAFETY and RELIABILITY,
repairs, maintenance and adjustment (including brush
inspection and replacement) should be performed by a
DeWALT factory service center or a DeWALT authorized
service center. Always use identical replacementparts.
Dust Extraction System (Fig. M)
The use of a dust extraction system is recommended to
reduce potentially harmful airborne dust and to prolong tool
and accessorylife.
Consult your dealer for further information on suitable dust
extractionsystems.
Maximum Recommended Capacities
RPM 0–1060
BPM 4980
Bits, Masonry Drilling 5/32"–3/8" (optimum drilling range)
Accessories

WARNING: Since accessories, other than those offered
by DeWALT, have not been tested with this product, use
of such accessories with this tool could be hazardous.
To reduce the risk of injury, only DeWALT recommended
accessories should be used with thisproduct.
Recommended accessories for use with your tool are
available at extra cost from your local dealer or authorized
servicecenter.
Cleaning

WARNING: Blow dirt and dust out of all air vents with
clean, dry air at least once a week. To minimize the
risk of eye injury, always wear approved eye protection
when performingthisprocedure.

WARNING: Never use solvents or other harsh
chemicals for cleaning the non‑metallic parts of the
tool. These chemicals may weaken the plastic materials
used in these parts. Use a cloth dampened only with
water and mild soap. Never let any liquid get inside the
tool; never immerse any part of the tool into aliquid.
MAINTENANCE

WARNING: To reduce the risk of serious personal
injury, turn unit off and remove the battery pack
before making any adjustments or removing/
installing attachments or accessories. An
accidental start‑up can causeinjury.
Your DeWALT 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.
Hammerdrill Operation (Fig. I)
1. Turn the mode selector
5
to the rotary hammer
symbol
17
.
2. When drilling, use just enough force on the hammer
to keep it from bouncing excessively or “rising” off the
bit. Too much force will cause slower drilling speeds,
overheating, and a lower drillingrate.
3. Drill straight, keeping the bit at a right angle to the work.
Do not exert side pressure on the bit when drilling as
this will cause clogging of the bit flutes and a slower
drillingspeed.
4. When drilling deep holes, if the hammer speed starts to
drop off, pull the bit partially out of the hole with the tool
still running to help clear debris from thehole.
5. For masonry, use carbide‑tipped bits or masonry
bits. A smooth even flow of dust indicates the proper
drillingrate.
SPECIFICATIONS
DCH172
20V Max*