Maintenance - DeWalt DCF801 Instruction Manual

impact, providing the user with greater control and reducing
the chance of overtightening or damaging material.
When set in reverse, the tool will impact at a normal speed.
Upon sensing that the fastener has broken free, the tool will
cease to impact and will reduce speed to help prevent "run-
off" of loose hardware.
Precision Wrench™ Mode
Lo Mode
Hi Mode
Variable Speed Trigger and Forward/
Reverse Control Button (Fig. A)
The tool is turned on and off by pulling and releasing the
3
variable speed trigger . The farther the trigger is depressed,
the higher the speed of the tool. Your tool is equipped with
a brake. The chuck will stop as soon as the trigger switch is
fully released.
A forward/reverse control button
rotational direction of the tool and also serves as a
lock-off button.
• To select forward rotation (clockwise), release the trigger
and depress the forward/reverse control button on the
right side of the tool.
• To select reverse (counterclockwise), depress the
forward/reverse control button on the left side of
the tool.
NoTE: The center position of the control button locks the
tool in the off position. When changing the position of the
control button, be sure the trigger is released.
NoTE: Continuous use in variable speed range is not
recommended. It may damage the switch and should
be avoided.
NoTE: The first time the tool is run after changing the
direction of rotation, you may hear a click on start up. This is
normal and does not indicate a problem.
Worklights (Fig. A)

CAUTION: Do not stare into worklights. Serious eye
injury could result.
6
The worklights are located around the quick release
chuck or anvil. The worklights are activated when the trigger
is depressed. If the trigger switch remains depressed, the
worklights will remain on.
The beam will automatically turn off 20 seconds after the
trigger switch is released.
NoTE: The worklights are for lighting the immediate work
surface and are not intended to be used as a flashlight.
Usage (Fig. A)

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.
DCF902
Precision Wrench™
Low Speed Impacting
High Speed Impacting
4
determines the
2. Press variable speed trigger switch
Release variable speed trigger switch to stop operation.
Always check torque with a torque wrench, as the
fastening torque is affected by many factors including
the following:
Voltage: Low voltage, due to a nearly discharged
-
battery, will reduce fastening torque.
accessory size: Failure to use the correct accessory
-
size will cause a reduction in fastening torque.
Bolt size: Larger bolt diameters generally require
-
higher fastening torque. Fastening torque
will also vary according to length, grade, and
torque coefficient.
Bolt: Ensure that all threads are free of rust and other
-
debris to allow proper fastening torque.
Material: The type of material and surface finish of
-
the material will affect fastening torque.
Fastening time: Longer fasten ing time results in
-
increased fastening torque. Using a longer fastening
time than recommended could cause the fasteners
to be overstressed, stripped or damaged.
Your impact tool can generate the following
maximum torque:
Cat # Nm
DCF801 163.8
DCF902 169.5

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 D WALT power tool has been designed to operate
e
over a long period of time with a minimum of maintenance.
Continuous satisfactory operation depends upon proper tool
care and regular cleaning.
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.
Accessories

WARNING: Since accessories, other than those offered
by D WALT, have not been tested with this product, use
e
of such accessories with this tool could be hazardous.
To reduce the risk of injury, only D
accessories should be used with this product.
ENglIsh
3
to start operation.
Ft.‑Lbs. In.‑Lbs
120.8 1450
125 1500
WALT recommended
e
27