DeWalt DW551 Instruction Manual page 6

154730/DW551 5/17/02 3:03 PM
FIG. 1
STEEL RING
PIN
BUSH
WASHER
RED GREEN
LED LED
Page 3
CLAMP KNOB
FIG. 2
ELECTRONIC IMPACT
CONTROL DIAL
BIT SHANK
GROOVE
Service and Power Indicator LEDs
(Fig. 2) The RED service indicator LED lights up when the carbon
brushes are nearly worn out to indicate that the tool needs servicing.
After approximately 8 hours of use the motor will automatically be
shut off. Take the tool to a D
inspection and maintenance.
The GREEN power-ON indicator LED lights up when the tool is
switched ON. If the indicator LED is lit but the tool does not start,
this indicates a motor related problem. If the indicator LED does not
light up and the tool does not start, this indicates an ON/OFF switch,
cord or outlet related problem.
Bit Installation (Fig. 3)
1. Clean, then smear the bit shank with grease.
2. Push in the retainer button and insert the bit with the groove
downward. Fully insert the bit shank into the hammer.
3. Release retainer button. To remove the bit, push in retainer button
and pull out bit.
3
FIG. 3
RETAINER BUTTON
WALT service location for routine
E