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OPERATION
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.
Installing and Removing the Battery Pack
(Fig. G)
nOTE: For best results, make sure your battery pack is
fully charged.
To install the battery pack
6
battery pack with the rails inside the tool's handle and slide
it into the handle until the battery pack is firmly seated in
the tool and ensure that it does not disengage.
To remove the battery pack from the tool, press the release
button
5
and firmly pull the battery pack out of the tool
handle. Insert it into the charger as described in the charger
section of this manual.
Fig. G
6
5
Proper Hand Position (Fig. H)
WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown.
WARNING: To reduce the risk of serious personal injury,
ALWAYS hold securely in anticipation of a sudden
reaction.
Proper hand position requires one hand on the
main handle
.
4
Fig. H
Usage
Your impact tool can generate the following maximum
torque values.
nOTE: Output torque is dependent on the speed selected,
with the highest provided in Speed 3.
10
into the tool handle, align the
4
Ft.-lbs.
Low/High/
Cat #
Precision Wrench™
DCF894, DCF894H
0–150/0–330/0–330
CAUTION: Ensure fastener and/or system will
withstand the level of torque generated by the tool.
Excessive torque may cause breakage and possible
personal injury.
1. Place the accessory on the fastener head. Keep the tool
pointed straight at the fastener.
2. Press switch to start operation. Release switch to stop
operation. Always check torque with a torque wrench,
as the fastening torque is affected by many factors
including the following:
ʵ Voltage: Low voltage, due to a nearly discharged
battery, will reduce fastening torque.
ʵ Accessory size: Failure to use the correct accessory
size will cause a reduction in fastening torque.
ʵ Bolt size: Larger bolt diameters generally require
higher fastening torque. Fastening torque will
also vary according to length, grade, and torque
coefficient.
ʵ Bolt: Ensure that all threads are free of rust and other
debris to allow proper fastening torque.
ʵ Material: The type of material and surface finish of
the material will affect fastening torque.
ʵ Fastening time: Longer fasten ing time results in
increased fastening torque. Using a longer fastening
time than recom mended could cause the fasteners to
be overstressed, stripped or damaged.
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.
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 ANSI Z87.1 approved eye
protection when performing this.
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.
Accessories
WARNING: Since accessories, other than those
offered by D
WALT, have not been tested with this
e
product, use of such accessories with this tool could be
hazardous. To reduce the risk of injury, only D
nm
Low/High/
Precision Wrench™
200/447/447
WALT
e
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