Black & Decker 5027 - Manual (Page 5)

Grease Replacement
The air tight construction of your
hammer prevents most grease
leakage so that the tool can be used
for a long time without the need for
grease replacement. About every 6
months you should clean out the
grease and add a fresh supply.
Mamtenance and
Inspection
CAUTION: Be sure to switch
power OFF and disconnect the plug
during maintenance and inspection.
INSPECTING THE BIT
Since use of a dull bit will
degrade efficiency and cause
possible motor malfunction, sharpen
or replace the bit as soon as dulling
is noted.
INSPECTING THE MOUNTING
SCREWS
Regularly inspect all mounting
screws and ensure that they are
properly tightened. Should any of the
screws be loose, retighten them
immediately. Failure to do so could
result in serious hazard.
INSPECTING THE CARBON
BRUSHES (FIG. 3)
The motor employs carbon
brushes which are consumable
parts. When they become worn to or
near “wear limit”, it could result in
motor trouble. When an auto-stop
carbon brush is used, the motor will
stop automatically when the brushes
are worn out. At that time, replace
both carbon brushes with new ones.
In addition, always keep carbon
brushes clean and ensure that they
slide freely within the brush holders.
REPLACEMENT PROCEDURE
Loosen the screw (Flexagon
socket hd. bolt M5 x 10) of the tail
cover, then remove the tail cover.
(Center spread) After removing the
brush cap, the carbon brush can be
removed. After replacing the carbon
brush, tighten the brush cap, then
mount the tail cover securely and
tighten the screws.
Important
TO assure product SAFETY and
RELIABILITY,repairs, maintenance
and adjustment (excluding brush
inspection and replacement) should
be performed by Black & Decker
Service Centers or other qualified
organizations, always using Black &
Decker replacement parts. When
servicing Double Insulated Tools,
USE ONLY IDENTICAL REPLACE­
MENT PARTS.
Precautions On Using
Your Pavement
Breaker
1. Always wear a face mask when
operating this tool.
2. Use earplugs when operating
for extended periods.
3. Be sure to lock the bit holder in
position.
4. The bit becomes extremely hot
during operation. Avoid touching
it without heavy gloves.
5. Check all screws for tightness
before operation.
6. When working at elevated
locations, be alert to objects and
persons below.
7. Wear steel toed shoes to
protect your feet from injury.
Double Insulation
DOUBLE-INSULATED tools are
constructed throughout with TWO
separate “layers” of electrical
insulation or one DOUBLE thickness
of Insulation between you and the
tool’s electrical system.
Tools built with this insulation
system are not intended to be
grounded. As a result, your tool Is
equipped with a two-prong plug
which permits you to use extension
cords without concern for maintain­
ing a ground connection.
NOTE: DOUBLE INSULATION
does not take the place of normal
safety precautions when operating
this tool. The insulation system is for
added protection against injury
resulting from a possible electrical
insulation failure within the tool.
CAUTION: When servicing all
tools, USE ONLY IDENTICAL RE­
PLACEMENT PARTS. Repair or
replace damaged cords.
Applications
Breaking concrete, chipping off
concrete, grooving, and driving piles
Prior To Operation
POWER SOURCE
Ensure that the power source to
be utilized conforms to the power
requirements specified on the
product nameplate.
POWER SWITCH
Ensure that the power switch is in
the OFF position. If the plug is con­
nected to a power receptacle while
the power switch is in the ON
position, the tool will start operating
immediately, inviting serious
accident.