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18. Double insulated tools are equipped with a polarized plug (one blade is wider than the other). This plug will fit in a polarized outlet only one way. If the plug does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a polarized outlet. Do not change the plug in any way. Double Insulation eliminates the need for the three wire grounded power cord and grounded power supply system. 6 19. Dispose of expended batteries properly. The Porter-Cable Model 8823 Battery Pack contains rechargeable, nickel-cadmium batteries. These batteries must be recycled or disposed of properly. Drop off expended battery packs at your local replacement battery retailer, your local recycling center, or at a Porter-Cable Service Center (see list on back page of this manual). Applicable fees for the collection and recycling of these batteries (in the United States), have been paid to the RBRC™. For further information, call: 1-800-8-BATTERY. FUNCTIONAL DESCRIPTION FOREWORD Your Porter-Cable Cordless Hammer Drill/Driver is designed to drill holes and drive fasteners in various materials as indicated in the following chart: RBRC™ is a Trademark of the Rechargeable Battery Recycling Corporation. MAXIMUM CAPACITIES SPEED RANGE DRILLING DRIVING MILD STEEL ALUMINUM WOOD SELF-FEED BIT WOOD SCREWS LOW 3/8" 3/8" 1" 3/8" HIGH 3/8" 3/8" 1/2" #10 SWITCH OPERATION Squeeze trigger switch (A) Fig. 1 to start motor. Release trigger to stop motor. As the trigger is squeezed, the motor speed increases. NOTE: A low volume, high pitched tone is normal while the switch is in the variable speed mode. FORWARD/REVERSE • Make sure that the trigger switch (A) Fig. 1 is in the "OFF" position before attempting to change the direction of rotation. • Push button (B) Fig. 1 toward the left side of the drill for FORWARD (clockwise) rotation. • Push button (B) Fig. 1 toward the right side of the drill for REVERSE (counter-clockwise) rotation. • Place button (B) Fig. 1 in the center position to lock trigger switch in the "OFF" position. ELECTRIC BRAKE When the trigger switch is released, an electric brake automatically engages to stop spindle rotation. 7 A B Fig. 1 INSTALLING AND REMOVING DRILL AND SCREWDRIVER BITS Always set the reversing button to the center (locked "OFF") position when installing and removing bits. 1. The three-jaw chuck is designed for self-centering of the bit. Open jaws large enough by turning the sleeve (A) Fig. 2 counterclockwise, when viewing the chuck from the bit end, so that the bit shank can be inserted easily. 2. Clean and insert the smooth end of the bit as far as it will go into the chuck, or up to the flutes for small bits. 3. While holding the bit with one hand, turn the sleeve (A) Fig. 2 clockwise until the bit is gripped in the chuck. 4. Tighten the chuck by turning the sleeve (A) clockwise. Tighten securely. A Fig. 2 Do not operate the drill motor while installing or removing bits. This action may cause the bit to be thrown from the chuck, causing personal injury. 5. To remove the bit, reverse procedure. ADJUSTING TORQUE COLLAR The clutch unit provides twenty clutch settings, a “Drill” (solid lock-up) setting (and a hammer position for the hammer drill). Lowest torque is available at setting #1, with maximum torque available at the “Drill” setting. The amount of output torque may be adjusted by rotating the front collar (A) Fig. 3A, so that the desired torque setting is aligned with the index mark (B) Fig. 3A. In general, lower torque settings are used for driving small screws and other delicate work, while higher torque settings are used for driving larger screws. The “Drill” position is used for drilling and for driving very large screws. The Model 977 is equipped with a hammer setting (A) Fig. 3B. The hammer position is used when “impacting” is needed to assist in the drilling operation (concrete, bricks, etc.). The hammering function will not engage unless the torque collar is set A B A Fig. 3A Fig. 3B to the hammer position AND the drill bit is pushed against the work. TWO-SPEED GEAR SHIFT The Model 966, 977, and 978 cordless tools all have a two-speed gear shift which provides spindle speed ranges of approximately 0 to 450 RPM (LOW) and 0 to 1400 RPM (HIGH) for Models 977and 978, and 0-400 RPM (LOW) and 0-1300 RPM (HIGH) for Model 966. To change speed ranges, release trigger switch to stop motor. Slide speed selector (A) Fig. 4 backward for HIGH speed or forward for LOW speed. 8 The low speed position is normally used when drilling larger holes and when driving or removing screws. The high speed position is normally used for drilling small holes. DRIVER BIT STORAGE Convenient storage areas with retaining clip (B) Fig. 4 for screwdriver bits are provided on each side of the tool. A B Fig. 4 SIDE HANDLE Model 977 is shipped with a side handle (A) Fig. 5 to provide additional control and support during high torque drilling and driving operations. To use, screw...
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