FUNCTIONAL DESCRIPTION
CAUTION:
•Always be sure that the tool is switched off and unplugged before adjusting or checking function on the tool.
Speed change
For Model DA4031 only
13
1.Pointer
2.Speed change knob
3.Lock button
Switch action
1
1. Switch trigger
2
003031
Two speed ranges can be preselected with the speed change knob.
To change the speed, depress the lock button and turn the speed change knob so that the pointer points to the
003021
CAUTION:
•Before plugging in the tool, always check to see
that the switch trigger actuates properly and returns to the "OFF" position when released.
To start the tool, simply pull the switch trigger. Release the switch trigger to stop.
position 1 for low speed or the position 2 for high speed.
CAUTION:
• | Use the speed change knob only after the tool |
| comes to a complete stop. Changing the tool |
| speed before the tool stops may damage the tool. |
• | Always set the speed change knob carefully into |
| the correct position. If you operate the tool with the |
| speed change knob positioned halfway between |
Reversing switch action
1
A 
B
1.Reversing switch lever
the position 1 and the position 2, the tool may be |
damaged. |
Torque limiter
For Model DA4031 only
The torque limiter will actuate when a certain torque level is reached (for lower speed setting: position 1). The motor will disengage from the output shaft. When this happens, the bit will stop turning.
003028
Switch handle mounting positions
This tool has a reversing switch to change the direction of rotation. Depress the reversing switch lever from the A side for clockwise rotation or from the B side for counterclockwise rotation.
CAUTION:
• | Always check the rotational direction before |
21
3 
4 
1.Mark
2.Motor housing
3.Lock button
4.Handle
operation. |
• Use the reversing switch only after the tool comes |
to a complete stop. It will damage the tool to |
change the rotational direction before the tool |
stops. |
003034
The switch handle can be rotated to either 90° left or right to fit your work needs. First, unplug the tool. Press the lock button and rotate the switch handle until the 
mark on the lock button is aligned with that on the motor housing. The switch handle will be locked in that position.
5
