Hilti SD 4500 Operating Instructions Manual page 13

7.1.3.2 Changing the bit holder on the SD 4500 3
NOTE
The chuck features a standard 1/4" hex. socket for insert
tools (bits, bit holder, bits for use with screw magazines).
1. Disconnect the supply cord plug from the power
en
outlet.
2. Pull the depth gauge away from the power tool,
releasing the click connection.
The bit holder is then exposed and can be changed.
3. Push the chuck toward the power tool, turn it slightly
and hold it securely.
Use the other hand to remove the bit holder.
7.1.3.3 Changing the bit holder on the SD 2500
NOTE
The chuck features a standardized 1/4" hex. socket for
insert tools (bits, bit holder, bits for use with screw
magazines).
1. Disconnect the supply cord plug from the power
outlet.
2. Pull the depth gauge away from the power tool,
releasing the click connection.
The bit holder is then exposed and can be changed.
3. Grip the bare metal of the bit holder and pull it
forward while easing it away from the gear housing.
The bit holder is released from the chuck.
7.1.4 Fitting / removing the belt hook
7.1.4.1 Fitting the belt hook 4
1. Fit the belt hook mounting lug into the ventilation
slot on the power tool.
2. Slide the belt hook forward.
3. Secure the belt hook with the retaining screw.
7.1.4.2 Removing the belt hook 5
1. Release the belt hook by removing the screw.
2. Slide the belt hook to the rear.
3. Pull the belt hook upwards out of the ventilation
slots.
7.2 Operation
CAUTION
The power tool and the screwdriving operation generate
noise. Wear ear protectors. Excessive noise may damage
the hearing.
8
7.2.1 Setting forward or reverse rotation 6
The forward / reverse switch is used to select the direction
of rotation of the drive spindle. An interlock prevents
operation of the switch while the motor is running.
1. Push the forward / reverse switch to the left (as seen
in the working direction) to set the power tool to
forward rotation.
2. Push the forward / reverse switch to the right (as
seen in the working direction) to set the power tool
to reverse rotation.
7.2.2 Switching on / off
1. Plug the supply cord into the power outlet.
2. The speed of the power tool can be controlled
smoothly (increased from minimum to maximum) by
pressing the control switch gradually.
NOTE The spindle rotates only when axial pressure
is applied.
7.2.3 Lockbutton for sustained operation 7
NOTE
The lockbutton for sustained operation allows the motor
to run continuously without need for constant pressure
on the control switch.
7.2.3.1 Switching on in sustained operating mode
1. Press the control switch fully.
2. While maintaining pressure on the control switch,
press the lockbutton and then release the control
switch.
7.2.3.2 Switching off after sustained operation
Press the control switch. The lockbutton returns to its
original position.
7.2.4 Removing a previously-driven screw 8
1. Remove the depth gauge or the magazine by pulling
it forward, away from the power tool.
2. Set the forward / reverse switch to the reverse
rotation position.
3. The screw can then be removed.