Use and Care Manual

10 11
1. To attach an accessory, pull the chuck
collar forward and insert the accessory
shank. Release the collar. It may be
necessary to pull the bit out slightly to
engage the holding mechanism.
2. To remove the accessory, pull the chuck
collar forward and remove the acces-
sory. Release the collar.
Fig. 4
Open (Release)
Closed (Locked)
Ball-retainer
groove
Attaching and Removing Accessories
(Cat. No. 9092-20, 9096-20, or other Impact
Wrenches using the Quick Change 1/2"
Square Drive to 7/16" Hex Adapter)
Cat. No. 9092-20 and accessory Cat. No.
48-66-0061 are intended for use with acces-
sories with a 7/16" Hex Quick Change shank.
Cat. No. 9096-20 is intended for use with
accessories with a 5/8" Hex Quick Change
shank. Both Hex Quick Change shanks have
a ball-retainer groove. They are not intended
for use with Hex Shank Bit Extensions.
Using the Forward/Reverse Switch
(Cat. No. 9072-20, 9072-22, 9092-20, and
9096-20)
This impact wrench is equipped with a
forward/reverse switch that may be set to
forward or reverse rotation.
1. For forward (clockwise) rotation, push
the forward/reverse switch in the direc-
tion shown. Check the direction of rota-
tion before use.
2. For reverse (counterclockwise) rotation,
push the forward/reverse switch in the
direction shown. Check the direction of
rotation before use.
Fig. 5
Forward
Reverse
Forward/ Reverse
Switch
WARNING
To reduce the risk of injury, wear
safety goggles or glasses with side
shields. Unplug the tool before
changing accessories or making
adjustments.
OPERATION
WARNING
To reduce the risk of injury, keep
hands and cord away from the bit
and all moving parts.
WARNING
To reduce the risk of explosion, elec-
tric shock and property damage, al-
ways check the work area for hidden
pipes and wires before drilling.
This impact wrench may be operated at
any speed from 0 to full speed. The speed
will remain variable up to the chosen speed
dial setting by use of the trigger. The speed
dial turns clockwise to increase the speed
or counterclockwise to decrease the speed
(Fig. 7).
1. Select a speed on the speed dial.
2. To start the tool, pull the trigger.
3. To vary the driving speed, increase or
decrease pressure on the trigger. The
further the trigger is pulled, the greater
the speed.
4. To stop the tool, release the trigger.
Rocker
switch
Fig. 8
Fig. 6
Starting, Stopping and Controlling Speed
(Cat. No. 9072-20, 9072-22, 9092-20, and
9096-20)
Fig. 7
Trigger
Speed dial
To increase
the speed
Starting and Stopping the Tool
(Cat No. 9070-20, 9071-20, 9075-20)
WARNING
To reduce the risk of injury, only
grasp tool by handle and red insu-
lated surfaces (Fig. 6). Do not hold
gray gear case when impacting or
drilling.
These impact wrenches are equipped with
a rocker switch that offers both forward and
reverse rotation.
1. For forward (clockwise) rotation, pull
the lower portion of the switch.
2. For reverse (counterclockwise) rotation,
pull the upper portion of the switch.
NOTE: To prevent damage to the motor and
internal mechanism, allow the motor to stop
completely before switching from forward to
reverse or from reverse to forward.
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 impacting. 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
suffi cient 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 fi nal tightening.