DeWalt DC901 Mode D'emploi page 31

To refresh your battery pack, place the battery in the
charger as usual. Leave the battery pack for at least
8 hours in the charger.
Hot/Cold Pack Delay
When the charger detects a battery that is too hot or
too cold, it automatically starts a Hot/Cold Pack
Delay, suspending charging until the battery has
reached an appropriate temperature. The charger
then automatically switches to the pack charging
mode. This feature ensures maximum battery life.
Deep discharge protection
The battery pack is protected against deep
discharging when it is used in the tool.
Inserting and removing bits (fi g. A & C)
• Open the chuck by turning the sleeve (15)
counterclockwise and insert the bit shank.
• Place the bit in the chuck as far as it will go and
lift slightly before tightening.
• Tighten fi rmly by turning the sleeve clockwise.
• To remove the bit, proceed in reverse order.
Selecting the operating mode (fi g. D)
The tool can be used in the following operating
modes:
- Screwdriving
- Rotary drilling: for steel, wood and plastics
- Percussion drilling: for masonry
• To select the screwdriving mode, align the
collar (5) with the symbol (16) on the housing.
• To select the rotary drilling mode, align the
collar (5) with the symbol (17) on the housing.
• To select the percussion drilling mode, fi rst select
the rotary drilling mode and then align the symbol
on the collar (4) with the indicator (18) on the
collar (5).
WARNING: Do not select the operating
mode when the tool is running.
Adjusting the torque (fi g. D)
The collar of this tool has a wide range of positions
for the adjustment of the torque to suit the size of
the screw and the workpiece material. For torque
adjustment, refer to the section "Screwdriving".
• Select the torque by aligning the symbol or
number on the collar (4) with the indicator (18) on
the collar (5).
Forward/reverse slider (fi g. E)
• To select forward or reverse rotation, use the
forward/reverse slider (2) as shown (see arrows
on tool).
WARNING: Always wait until the motor
has come to a complete standstill before
changing the direction of rotation.
Three-gear selector (fi g. F)
Your tool is fi tted with a three-gear selector (6) to
vary the speed/torque ratio.
1 low speed/high torque
2 medium speed/medium torque
3 high speed/low torque
For speed rates, refer to the technical data.
• Do not change gears at full speed or during use.
Instructions for use
WARNING:
• Always observe the safety instructions
and applicable regulations.
• Be aware of the location of pipework and
wiring.
• Apply only a gentle pressure to the tool.
Excessive force does not speed up
drilling but decreases tool performance
and may shorten tool life.
Prior to operation:
• Make sure your battery pack is (fully) charged.
• Make sure the battery pack is properly seated.
• Insert the appropriate bit.
• Mark the spot where the hole is to be drilled.
Switching on and off (fi g. A & E)
• To run the tool, press the variable speed switch
(1). The pressure exerted on the variable speed
switch determines the tool speed.
• To stop the tool, release the switch.
• To lock the tool in the off position, move the
forward/reverse slider (2) to the central position.
Screwdriving (fi g. A)
• Select the drilling mode using the collar (5).
• Select forward or reverse rotation using the
slider (2).
• Set the collar (4) to position 1 and begin
screwdriving (low torque).
• If the clutch ratchets too soon, adjust the collar
to increase the torque as required.
E N G L I S H
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