rotation before the tool stops may damage the tool.
•If the switch trigger can not be depressed, check to see that the reversing switch is fully set to position
(A side) or 
(B side).
Selecting the action mode
1. Action mode change lever
1
008894
This tool has an action mode change lever. For rotation with hammering, slide the action mode change lever to the right ( 
symbol). For rotation only, slide the action mode change lever to the left ( 
symbol).
CAUTION:
•Always slide the action mode change lever all the way to your desired mode position. If you operate the tool with the lever positioned halfway between the mode symbols, the tool may be damaged.
ASSEMBLY
CAUTION:
•Always be sure that the tool is switched off and unplugged before carrying out any work on the tool.
Installing side grip (auxiliary handle)
Installing or removing drill bit
For Model HP1630
1. Chuck key
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008896
To install the bit, place it in the chuck as far as it will go. Tighten the chuck by hand. Place the chuck key in each of the three holes and tighten clockwise. Be sure to tighten all three chuck holes evenly.
To remove the bit, turn the chuck key counterclockwise in just one hole, then loosen the chuck by hand.
For Model HP1631
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| 1. | Sleeve |
1 | 2. | Ring | |
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008900
Hold the ring and turn the sleeve counterclockwise to open the chuck jaws. Place the bit in the chuck as far as it will go. Hold the ring firmly and turn the sleeve clockwise to tighten the chuck.
To remove the bit, hold the ring and turn the sleeve counterclockwise.
1. Side grip
Depth gauge
1
1
3
1.Depth gauge
2.Side grip
3.Grip base
008895
Always use the side grip to ensure operating safety. Install the side grip on tool barrel.
Then tighten the grip by turning clockwise securely at the desired position. It may be swung 360° so as to be secured at any position.
NOTE:
•The side grip cannot swing 360° when the depth gauge is installed.
2
008897
The depth gauge is convenient for drilling holes of uniform depth. Loosen the side grip and insert the depth gauge into the hole in the side grip. Adjust the depth gauge to the desired depth and tighten the side grip.
NOTE:
•The depth gauge cannot be used at the position where the depth gauge strikes against the tool body.
5