DeWalt DCH481 Original Instructions Manual page 33

Anti-Rotation System (Fig. D)
In addition to the clutch, an anti-rotation system offers increased
user comfort and safety through an on-board, anti-rotation
technology capable of detecting if the user loses control of
the hammer. When a jam is detected, the torque and speed are
reduced instantly. This feature prevents self rotation of the tool
reducing the occurrence of wrist injuries.
The anti-rotation system indicator
indicate status.
Indicator Diagnosis
OFF Tool is functioning
normally
SOLID Anti-Rotation
System has
been activated
(ENGAGED)
Active Vibration Control
For best vibration control, hold the tool as described in Proper
Hand Position.
The active vibration control neutralises rebound vibration from
the hammer mechanism. Lowering hand and arm vibration,
it allows more comfortable use for longer periods of time and
extends the life of the unit.
The hammer only needs enough pressure to engage the active
vibraton control. Applying too much pressure will not make
the tool drill or chip faster and active vibration control will
not engage.
ASSEMBLY AND ADJUSTMENTS

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start-up can cause injury.

WARNING: Use only D
e
Inserting and Removing the Battery Pack
from the Tool (Fig. B)
nOTE: Make sure your battery pack
To Install the Battery Pack into the Tool
Handle
1. Align the battery pack 1 with the rails inside the tool's
handle (Fig. B).
2. Slide it into the handle until the battery pack is firmly seated
in the tool and ensure that you hear the lock snap into place.
To Remove the Battery Pack from the Tool
1. Press the release button
2
out of the tool handle.
2. Insert battery pack into the charger as described in the
charger section of this manual.
11 will illuminate to
Solution
Follow all warnings and instructions
when operating the tool.
With the tool properly supported,
release trigger. The tool will function
normally when the trigger is depressed
again and the indicator light will go out
WALT battery packs and chargers.
1 is fully charged.
and firmly pull the battery pack
Fuel Gauge Battery Packs
Some D WALT battery packs include a fuel gauge which
e
consists of three green LED lights that indicate the level of
charge remaining in the battery pack.
To actuate the fuel gauge, press and hold the fuel gauge
button 12 . A combination of the three green LED lights will
illuminate designating the level of charge left. When the level
of charge in the battery is below the usable limit, the fuel gauge
will not illuminate and the battery will need to be recharged.
nOTE: The fuel gauge is only an indication of the charge left on
the battery pack. It does not indicate tool functionality and is
subject to variation based on product components, temperature
and end-user application.
Side Handle (Fig. A)

WARNING: To reduce the risk of personal injury, ALWAYS
operate the tool with the side handle properly installed.
Failure to do so may result in the side handle slipping
during tool operation and subsequent loss of control. Hold
tool with both hands to maximize control.
The side handle 3 clamps to the front of the gear case and
may be rotated 360˚ to permit right- or left-hand use. The side
handle must be tightened sufficiently to resist the twisting
action of the tool if the accessory binds or stalls. Be sure to grip
the side handle at the far end to control the tool during a stall.
To loosen side handle, rotate counterclockwise.
Bit and Bit Holder

WARNING: Burn Hazard. ALWAYS wear gloves when
changing bits. Accessible metal parts on the tool and bits
may get extremely hot during operation. Small bits of
broken material may damage bare hands.
The hammerdrill can be fitted with different bits depending on
the desired application. Use sharp drill bits only.
SDS-Max Bit Holder (Fig. A, C, F)
To insert a drill bit or other accessory:
1. Insert the shank of the bit about 19 mm into SDS-Max tool
holder .
8
2. Push and rotate bit until it locks in place. The bit will be
securely held.
3. To release bit, pull the sleeve
OPERATION
Instructions for Use

WARNING: Always observe the safety instructions and
applicable regulations.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start-up can cause injury.
Proper Hand Position (Fig. F)

WARNING: To reduce the risk of serious personal injury,
ALWAYS use proper hand position as shown.
EngLIsH
9 back and remove the bit.
31