page 6
OPERATION
Using the Forward/Reverse Switch (Fig. 7)
The forward/reverse switch may be set to three positions: forward,
reverse and lock. Due to a lockout mechanism, the forward/reverse
switch can only be adjusted when the trigger is not depressed. Always
allow the motor to come to a complete stop before using the forward/
reverse switch.
1.
For
forward
(clockwise) rotation, push the forward/reverse switch
in the direction shown. Check the direction of rotation before use.
2.
For
reverse
(counterclockwise) rotation, push the forward/reverse
switch in the direction shown. Check the direction of rotation before
use.
3.
To lock the trigger, push the forward/reverse switch to the center
position. The trigger will not work when the forward/reverse switch is
in the locked position. Always lock the trigger or remove the battery
pack before performing maintenance, changing accessories, storing
the tool and any time the tool is not in use.
Starting, Stopping and Controlling Speed
This impact wrench may be operated at any speed from 0 to full speed.
1.
To
start
the tool, pull the trigger.
2.
To vary the driving speed, increase or decrease pressure on the trig-
ger. The further the trigger is pulled, the greater the speed.
3.
To
stop
the tool, release the trigger.
Impacting Techniques
The longer a bolt, screw, or nut is impacted, the tighter it will become. To
help prevent damaging the fasteners or workpieces, avoid excessive im-
pacting. Be particularly careful when impacting smaller fasteners because
they require less impacting to reach optimum torque.
Practice with various fasteners, noting the length of time required to reach
the desired torque. Check the tightness with a hand-torque wrench. If the
fasteners are too tight, reduce the impacting time. If they are not tight
enough, increase the impacting time.
Impacting for two seconds is generally sufficient for a 3/8" bolt and one
second for a 5/16" bolt. However, oil, dirt, rust or other matter on the
threads or under the head of the fastener affects the degree of tightness.
The torque required to loosen a fastener averages 75% to 80% of the
tightening torque, depending on the condition of the contacting surfaces.
However, if rust or corrosion causes seizing, more torque may be required.
On light gasket jobs, run each fastener down to a relatively light torque
and use a hand torque wrench for final tightening.
To reduce the risk of injury, wear safety
goggles or glasses with side shields.
WARNING!
WARNING!
To reduce the risk of injury, keep hands and
away from the bit and all moving parts.
WARNING!
To reduce the risk of explosion, electric shock
and property damage, always check the work
area for hidden pipes and wires before drilling.
WARNING!
To reduce the risk of injury, only grasp tool by
handle and red insulated surfaces (Fig. 8). Do not
hold gray gear case when impacting or drilling.
Fig. 8
Fig. 7
Forward
Reverse
Forward/
Reverse switch
