Chicago Pneumatic CP8750 Manual Del Operador página 6

To reduce the risk of injury, wear safety goggles
or glasses with side shields.
Starting and Stopping the Tool (Fig. 2)
This impact wrench is equipped with a rocker switch that offers both
forward and reverse rotation.
Fig. 2
Rocker
switch
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.
To reduce the risk of injury, keep hands and cord
away from the bit and all moving parts.
To reduce the risk of explosion, electric shock
and property damage, always check the work
area for hidden pipes and wires before drilling.
page 6
WARNING!
WARNING!
WARNING!
OPERATION
To reduce the risk of injury, only grasp tool by
handle and black insulated surfaces . Do not hold
gray gear case when impacting or drilling.
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 be-
cause 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.
On light gasket jobs, run each fastener down to a relatively light torque
and use a hand torque wrench for final tightening.
WARNING!