Operation - DeWalt DCF891 Original Instructions Manual

EnGLIsh
Worklight (Fig. A, C)
The worklight 6 is activated when the variable speed trigger
is depressed. Pressing the worklight switch
cycle through low illumination, high illumination, and off.
nOTE: The worklight is for lighting the immediate work surface
and is not intended to be used as a flashlight.
Mode Selector (Fig. A, C)
Your tool is equipped with a mode selector
to select one of three speeds or Precision Wrench™ mode. Select
the mode based on the maximum speed/torque needed and
control the speed of the tool using the variable speed trigger
switch .
1
Precision Wrench™ (Fig. C)
In addition to low speed impacting modes, this tool features
the Precision Wrench™ mode which grants the user greater
control in both fastening and loosening applications. When set
in forward, the tool will fasten at 2000 RPM until impact begins.
The tool will then pause for 0.5 seconds before continuing
to impact at a rate of 3250 IPM, 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 and
rate of 3250 IPM. 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.
specifications
Mode
Low Mode Normal Impacting
Medium Mode Medium Impacting
High Mode High Speed Impacting 0–2000 forward
Precision Wrench™ Mode Precision Wrench™
Anvil (Fig. A)

WARNING: Use only impact accessories. Non-impact
accessories may break and cause a hazardous condition.
Inspect accessory prior to use to ensure that it contains
no cracks.

CAUTION: Inspect anvils, detent pins, and hog rings prior
to use. Missing or damaged items should be replaced
before use.
Place the switch in the locked off (centre) position or remove
battery pack before changing accessories.
Anvil with Detent Pin (Fig. D)
DCF892
To install an accessory on the anvil, align the hole in the side
of the accessory with the detent pin
the accessory on until the detent pin engages in the hole.
32
repeatedly will
15
7 which allows you
Application RPM
0–600 forward
0–2000 reverse
0–1200 forward
0–2000 reverse
0–2000 reverse
0–2000 forward
0–2000 reverse
14 on the anvil 3 . Press
Depression of detent pin may be necessary to aid installation
of accessory.
1
To remove an accessory, depress the detent pin through the
hole and pull the accessory off.
Anvil With Hog Ring (Fig. D)
DCF891
To install an accessory on the hog ring anvil, firmly push
accessory onto the anvil
allow the accessory to slide on. After accessory is installed, the
hog ring applies pressure to help provide accessory retention.
To remove an accessory, grasp the accessory and firmly pull
it off.

OPERATION

Instructions for Use

WARNING: Always observe the safety instructions and
applicable regulations.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start-up can cause injury.
Proper Hand Position (Fig. E)

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 10 .
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.
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.
. The hog ring compresses to
3 13
1 to start operation.