DeWalt DCN891 - Pin and Fastener Troubleshooting; Concrete Fastener Issues; Actuating the Tool

ENGLISH
11
4. Release the trigger and raise the nailer from the
worksurface.
NOTE: The tool motor returns to full speed
automatically without the contact trip
6
beingdepressed.
5. Repeat steps 2–4 to actuate the nextnail.
Pin/Fastener Troubleshooting
Properly driven pin Over driven pin
CONCRETE
Pin does not hold in the concrete.
Cause:
- Too hard/high
strengthconcrete.
- Hard or large aggregate
inconcrete.
Action:
- Use shorter pin.
- Switch to higher
powersetting.
Pin does not drive deep enough.
Cause:
- Pin too long.
- Power setting too low.
Action:
- Use shorter pin.
- Switch to higher
powersetting.
Pin drives too deep.
Cause:
- Pin too short for application.
- Power setting too high.
Action:
- Use longer pin.
- Switch to lower
powersetting.
Fig. H
3
NOTICE: Driving pins into soft materials at high
power settings will cause excessive wear to your
tool and may result in early failures.
Power
Setting
Application Typical Pin Length
1
Fastening to Low Strength Concrete/
Masonry (<4000 psi)
3/4" to 1-1/4" typ.
2
Fastening to High Strength Concrete
(>4000 psi)
3/4" to 1" typ.
3
Fastening to High Strength Concrete
(>4000 psi)
Fastening to structural steel;
Fastening through plywood, insulation,
or fixture
1/2" to 2-1/4" typ.

WARNING: Pins must be driven straight into the
material. Do not tilt nailer while driving fasteners.
Refer to Fig.I. Pin retention values improve when the
tool is fired perpendicular to the material.
Fig. I
Actuating the Tool (Fig. A)

WARNING: Always wear proper eye [ANSI Z87.1
(CAN/CSA Z94.3)] and ANSI S12.6 (S3.19) hearing
protection when operatingtool.
The motor rotation speed is automatically restored after
driving a pin to allow fast consecutive nailing.
1. Release the trigger lock-off
2
.
2. Push the contact trip
6
against the worksurface.
3. Pull the trigger switch
1
to actuate thetool.