Black & Decker GCO1200C Instruction Manual page 8

WARNING:
Drill may stall (if overloaded or improperly used) causing a twist. Always
expect the stall. Grip the drill firmly with both hands to control the twisting action and
prevent loss of control which could cause personal injury. If a stall does occur, release
the trigger immediately and determine the reason for the stall before re-starting.
INSTALLING AND REMOVING THE BATTERY PACK FROM THE TOOL
WARNING:
Make certain the lock-off button is engaged to prevent switch actuation
before removing or installing battery.
TO INSTALL BATTERY PACK: Insert battery pack (5) into tool, until an audible click is
heard. Ensure battery pack is fully seated and fully latched into position.
TO REMOVE BATTERY PACK: Depress the battery release button (6) and pull battery
pack out of tool.
OPERATING INSTRUCTIONS
TRIGGER SWITCH & REVERSING BUTTON (FIGURE C)
• The drill is turned ON and OFF by pulling and releasing the trigger switch (1). The
farther the trigger is depressed, the higher the speed of the drill operates at.
• A forward/reverse control button (2)
determines the direction the tool turns
and and also serves as a lock off button.
• To select forward rotation, release the
trigger switch and depress the forward/
reverse control button to the left.
• To select reverse, depress the forward/
reverse control button the opposite direction.
NOTE: The center position of the control
button locks the tool in the off position.
When changing the position of the control
button, be sure the trigger is released.
TORQUE CONTROL (FIGURE D)
This tool is fitted with a torque adjustment
collar (3) to select the operating mode and
to set the torque for tightening screws.
Large screws and hard workpiece materials
require a higher torque setting than small
screws and soft workpiece materials.
• For drilling, set the collar to the drilling
position symbol
• For screwdriving, set the collar to the
desired setting. If you do not yet know the
appropriate setting, proceed as follows:
• Set the collar to the lowest torque setting.
• Tighten the first screw.
• If the clutch ratchets before the desired
result is achieved, increase the collar
setting and continue tightening the screw.
Repeat until you reach the correct setting.
Use this setting for the remaining screws.
KEYLESS CHUCK (FIGURE E)
WARNING:
Make certain the lock-off
button is engaged to prevent switch actuation
before installing or removing accessories.
To insert a drill bit or other accessory:
1. Grasp the rear half of the chuck (4)
with one hand and use your other
hand to rotate the front half (4a) in the
counterclockwise direction, as viewed
from the chuck end.
2. Insert the bit or other accessory fully into
the chuck, and tighten securely by holding
the rear half of the chuck and rotating the
front portion in the clockwise direction as
viewed from the chuck end.
C
2
D
E
4a
8
1
3
4