master mechanic 134468 User manual

7 AMP 1/2" VARIABLE SPEED HAMMER DRILL
134468
Owner’s Manual
PRODUCT SPECIFICATIONS
Rating:
120V, 60Hz, AC
Amperes:
7 AMP
Motor speed:
0–2,800 RPM (no load)
Beats per minute:
44,800
Chuck:
1/2" Keyed
Maximum drilling capacity in
metal:
1/2” (13 mm)
Weight:
4 lb 14 oz (2.2 kg)
Need Assistance?
Call us on our toll free customer support line:
1-866-349-8665 Monday –Friday from 9am to 5pm
Eastern Standard Time
Technical questions
Replacement parts
Parts missing from package
Manufactured For and Distributed By
True Value® Company, Chicago, IL
©2011 True Value Company
Made in China

2
Product specifications ………….…………………………………………………….
1
Table of contents ……………………………………………………………………...
2
General safety warnings ……………………………………………………………..
3–4
Eye, ear & lung protection ……………………………………………………………
3–4
Electrical safety ……………………………………………………………………….
4
Power tool safety ……………………………………………………………………...
5–6
General safety rules …………………………………………………………………..
5
Work area ………………………………………………………………….…………..
5
Electrical safety ……………………………………………………………………….
5
Personal safety ………………………………………………………………………..
5–6
Power tool use and care.……………………………………………………………..
6–7
Service …………………………………………………………………………………
7
Specific safety rules …………………………………………………………………..
7–8
Extension cord safety ………………………………………………………….……..
8
Symbols ………………………………………………………………………………..
9
Know your hammer drill ……………………………………………………………...
10
Available accessories ………………………………………………………………...
10
Contents ……………………………………………………………………………….
11
Assembly and operating ……………………………………………………………..
12–21
Forward/reverse switch ………………………………………………………………
12
Variable-speed trigger switch ………………………………………………………..
12
Drill / impact switch …………………………………………………………………...
13
Installing drill bits ……………………………………………………………………...
14–15
Removing drill bits …………………………………………………………………….
15
Trigger switch lock ……………………………………………………………………
15
Installing the auxiliary handle ………………………………………………………..
16
Installing the depth rod ……………………………………………………………….
16
Drilling ………………………………………………………………………………….
18–19
Removing the chuck ………………………………………………………………….
20
Retightening a loose chuck ………………………………………………………….
21
Maintenance …………………………………………………………………………..
22
Exploded view …………………………………………………………………………
23
Parts list ………………………………………………………………………………..
24–25
Warranty ……………………………………………………………………….………
26
TABLE OF CONTENTS

3
EYE, EAR & LUNG PROTECTION
This instruction manual includes the following:
General Safety Rules
Specific Safety Rules and Symbols
Functional Description
Assembly
Operation
Maintenance
Accessories
!
ALWAYS WEAR EYE PROTECTION THAT CONFORMS WITH CSA
REQUIREMENTS or ANSI SAFETY STANDARD Z87.1
FLYING DEBRIS can cause permanent eye damage. Prescription
eyeglasses ARE NOT a replacement for proper eye protection.
WARNING: Non-compliant eyewear can cause serious injury if
broken during the operation of a power tool.
SAVE THESE INSTRUCTIONS FOR REFERENCE
WARNING: Use hearing protection, particularly during extended
periods of operation of the tool, or if the operation is noisy.
!
GENERAL SAFETY WARNINGS
WARNING: Before using this tool or any of its accessories, read this
manual and follow all Safety Rules and Operating Instructions. The important
precautions, safeguards and instructions appearing in this manual are not
meant to cover all possible situations. It must be understood that common
sense and caution are factors which cannot be built into the product.
!

4
ELECTRICAL SAFETY
WARNING: To avoid electrical hazards, fire hazards or damage to the
tool, use proper circuit protection.
This tool is wired at the factory for 120V AC operation. It must be connected
to a 120V AC, 15 AMP circuit that is protected by a time-delayed fuse or
circuit breaker. To avoid shock or fire, replace power cord immediately if it
is worn, cut or damaged in any way.
GENERAL SAFETY WARNINGS
WEAR A DUST MASK THAT IS DESIGNED TO BE USED WHEN
OPERATING A POWER TOOL IN A DUSTY ENVIRONMENT.
WARNING: Dust that is created by power sanding, sawing, grinding,
drilling, and other construction activities may contain chemicals that are
known to cause cancer, birth defects, or other genetic abnormalities. These
chemicals include:
Lead from lead-based paints
Crystalline silica from bricks, cement, and other masonry products
Arsenic and chromium from chemically treated lumber
The level of risk from exposure to these chemicals varies, according to how
often this type of work is performed. In order to reduce exposure to these
chemicals, work in a well-ventilated area, and use approved safety
equipment, such as a dust mask that is specifically designed to filter out
microscopic particles.
!

5
WARNING: Read all safety warnings
and instructions. Failure to follow the
warnings and instructions may result in
electric shock, fire and/or serious injury.
Save all warnings and instructions for
future reference.
Work area safety
Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
Do not operate power tools in explosive
atmospheres, such as in the presence
of flammable liquids, gases or dust.
Power tools create sparks which may
ignite the dust or fumes.
Keep children and bystanders away
while operating a power tool.
Distractions can cause you to lose control.
Electrical safety
Power tool plugs must match the outlet.
Never modify the plug in any way. Do
not use any adapter plugs with earthed
(grounded) power tools. Unmodified
plugs and matching outlets will reduce risk
of electric shock.
Avoid body contact with earthed or
grounded surfaces such as pipes,
radiators, ranges and refrigerators.
There is an increased risk of electric shock
if your body is earthed or grounded.
Do not expose power tools to rain or
wet conditions. Water entering a power
tool will increase the risk of electric shock.
Do not abuse the cord. Never use the
cord for carrying, pulling or unplugging
the power tool. Keep cord away from
heat, oil, sharp edges or moving parts.
Damaged or entangled cords increase the
risk of electric shock.
When operating a power tool outdoors,
use an extension cord suitable for
outdoor use. Use of a cord suitable for
outdoor use reduces the risk of electric
shock.
If operating a power tool in a damp
location is unavoidable, use a residual
current device (RCD) protected supply.
Use of a ground fault circuit interrupter
(GFCI) reduces the risk of electric shock.
Personal safety
Stay alert, watch what you are doing
and use common sense when operating
a power tool. Do not use a power tool
while you are tired or under the
influence of drugs, alcohol or
medication. A moment of inattention while
operating power tools may result in serious
personal injury.
Use personal protective equipment.
Always wear eye protection. Protective
equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing
protection used for appropriate conditions
will reduce personal injuries.
Prevent unintentional starting. Ensure
the switch is in the off-position before
connecting to power source and/or
battery pack, picking up or carrying the
tool. Carrying power tools with your finger
on the switch or energizing power tools
that have the switch on invites accidents.
POWER TOOL SAFETY
!

6
PERSONAL SAFETY –cont’d
Remove any adjusting key or wrench
before turning the power tool on. A
wrench or a key left attached to a rotating
part of the power tool may result in
personal injury.
Do not overreach. Keep proper footing
and balance at all times. This enables
better control of the power tool in
unexpected situations.
Dress properly. Do not wear loose
clothing or jewelry. Keep your hair,
clothing and gloves away from moving
parts. Loose clothes, jewelry or long hair
can be caught in moving parts.
If devices are provided for the
connection of dust extraction and
collection facilities, ensure these are
connected and properly used. Use of
dust collection can reduce dust-related
hazards.
Power tool use and care
Do not force the power tool. Use the
correct power tool for your application.
The correct power tool will do the job
better and safer at the rate for which it was
designed.
Do not use the power tool if the switch
does not turn it on and off. Any power
tool that cannot be controlled with the
switch is dangerous and must be repaired.
Disconnect the plug from the power
source and/or the battery pack from the
power tool before making any
adjustments, changing accessories, or
storing power tools. Such preventive
safety measures reduce the risk of starting
the power tool accidentally.
Store idle power tools out of the reach
of children and do not allow persons
unfamiliar with the power tool or these
instructions to operate the power tool.
Power tools are dangerous in the hands of
untrained users.
Maintain power tools. Check for
misalignment or binding of moving
parts, breakage of parts and any other
condition that may affect the power
tool’s operation. If damaged, have the
power tool repaired before use. Many
accidents are caused by poorly maintained
power tools.
Keep cutting tools sharp and clean.
Properly maintained cutting tools with
sharp cutting edges are less likely to bind
and are easier to control.
Use the power tool, accessories and
tool bits etc. in accordance with these
instructions, taking into account the
working conditions and the work to be
performed. Use of the power tool for
operations different from those intended
could result in a hazardous situation.
Hold power tools by insulated gripping
surfaces when performing an operation
where the cutting tool may contact
hidden wiring or its own cord. Contact
with a “live“wire will make exposed metal
parts of the tool “live“and shock the
operator.
Use auxiliary handles supplied with the
tool. Loss of control can cause personal
injury.
Wear ear protectors with impact drills.
Exposure to noise can cause hearing loss.
POWER TOOL SAFETY
SAVE THESE INSTRUCTIONS FOR REFERENCE

7
Service
Have your power tool serviced by a
qualified repair person using only
identical replacement parts. This will
ensure that the safety of the power tool is
maintained.
WARNING: Know your hammer
drill. Do not plug in the hammer drill
until you have read and understand this
Instruction Manual. Learn the tool’s
applications and limitations, as well as
the specific potential hazards related to
this tool.
Following this rule will reduce the risk of
electric shock, fire, or serious injury.
Always wear eye protection.
Any power tool can throw
foreign objects into your eyes
and cause permanent eye
damage. ALWAYS wear safety goggles
(not glasses) that comply with ANSI safety
standard Z87.1. Everyday glasses have
only impact resistant lenses. They ARE
NOT safety glasses.
WARNING: Glasses or goggles
not in compliance with ANSI Z87.1
could cause serious injury when they
break.
WARNING: Always use a safety
shield, hearing protection and dust
mask when operating the drill in
“hammer” mode.
Use only hammer drill bits and accessories
that are designed for use with a hammer
drill when using this hammer drill in the
hammer mode. Standard drill bits are NOT
designed for use in a hammer drill and
MUST NOT be used with a hammer drill.
They may shatter and possibly cause
serious injury.
Do not drill material too small to be
securely held.
Always keep hands out of the path of the
drill bit. Avoid awkward hand positions
where a sudden slip could cause your
hand to move into the path of the drill bit.
Secure the workpiece. Use clamps or a
vice to hold the workpiece. It is safer than
using your hand and it frees both hands to
operate the tool.
Make sure there are no nails or foreign
objects in the part of the workpiece to be
drilled.
To avoid injury from accidental starting,
always remove the plug from the power
source before installing or removing a drill
bit.
Do not install or use any drill bit that
exceeds 7” (17.5 cm) in length or extends
more than 6” (15 cm) beyond the chuck
jaws. They can bend or break suddenly.
Before starting the operation, jog the drill
switch to make sure the drill bit does not
wobble or vibrate.
Do not use fly cutters or multiple-part hole
cutters, because they can come apart or
become unbalanced during use.
SPECIFIC SAFETY
RULES
!
!
!
POWER TOOL SAFETY
SAVE THESE INSTRUCTIONS FOR REFERENCE

8
Make sure the spindle has come to a
complete stop before touching the chuck
or attempting to change the drill bit.
Always make sure the chuck is tight and
the drill bit firmly tightened in the chuck
before starting drill.
WARNING: Keep the extension
cord clear of the working area. Position
the cord so it will not get caught on the
workpiece, tools or any other obstructions
while you are working with the power tool.
Make sure any extension cord used with
this tool is in good condition. When using
an extension cord, be sure to use one of
heavy enough gauge to carry the current
the tool will draw. An undersized cord will
cause a drop in line voltage resulting in
loss of power and overheating.
The table at right shows the correct size to
use according to cord length and
nameplate ampere rating. If in doubt, use
the next heavier gauge. The smaller the
gauge number the heavier the cord.
Be sure your extension cord is properly
wired and in good condition. Always
replace a damaged extension cord or have
it repaired by a qualified electrician before
using it. Protect your extension cord from
sharp objects, excessive heat and damp or
wet areas.
Use a separate electrical circuit for your
power tools. This circuit must not be less
than 14 gauge wire and should be
protected with either a 15 AMP time
delayed fuse or circuit breaker. Before
connecting the power tool to the power
source, make sure the switch is in the OFF
position and the power source is the same
as indicated on the nameplate. Running at
lower voltage will damage the motor.
!
MINIMUM GAUGE (AWG)
EXTENSION CORDS (120V use only)
Amperage
rating
Total length
More
than
Not
more
than
25'
(7.5 m)
50'
(15 m)
100'
(30 m)
150'
(45 m)
0
6
18
16
16
14
6
10
18
16
14
12
10
12
16
16
14
12
12
16
14
12
Not Applicable
EXTENSION CORD
SAFETY
SPECIFIC SAFETY RULES

9
V
Volts
A
Amperes
Hz
Hertz
W
Watts
kW
Kilowatts
Microfarads
L
Liters
kg
Kilograms
H
Hours
N/cm2
Newtons per square
centimeter
Pa
Pascals
OPM
Oscillations per minute
Min
Minutes
S
Seconds
or a.c.
Alternating current
Three-phase alternating
current
Three-phase alternating
current with neutral
Direct current
No load speed
Alternating or direct
current
Class II construction
Splash-proof
construction
Watertight construction
Protective grounding at
grounding terminal,
Class I tools
Revolutions or
reciprocations per
minute
Diameter
Off position
Arrow
Warning symbol
Wear your safety
glasses
SYMBOLS
WARNING: Some of the following symbols may appear on the hammer
drill. Study these symbols and learn their meaning. Proper interpretation of
these symbols will allow for more efficient and safer operation of this tool.
!
This symbol designates that this tool is
listed with U.S. requirements by
Underwriters Laboratories.
61TN
E213739
JD2203U

10
AVAILABLE ACCESSORIES
WARNING: Use only accessories
that are recommended for this drill.
Follow the instructions that accompany
the accessories. The use of improper
accessories may result in injury to the
operator or damage to the drill.
Before using any accessory, carefully read
the instructions or the owner’s manual for
the accessory.
Drill bits
Buffing wheels
Sanding drums
Hole saws
Paint stirring accessories
WARNING: If any part is missing or
damaged, do not plug the drill into the
power source until the missing or damaged
part is replaced.
KNOW YOUR HAMMER DRILL
ACCESSORIES
!
!
Chuck
Variable speed
trigger switch
Forward/reverse
switch
Auxiliary
handle
Air vents
Lock-on
button
Chuck
key
Drill/hammer
mode switch
Depth stop rod

11
CONTENTS
Carefully unpack the drill. Compare the
contents against the “HAMMER DRILL
COMPONENTS” chart at right.
NOTE: See illustration of the drill below.
WARNING: To avoid fire or toxic
reaction, never use gasoline, naphtha,
acetone, lacquer thinner or similar
highly volatile solvents to clean the
tool.
!
HAMMER DRILL COMPONENTS
KEY
DESCRIPTION
QTY
A
Drill
1
B
Chuck key
1
C
Depth rod
1
D
Auxiliary handle
1
Owner’s Manual
1
CONTENTS

12
FORWARD/REVERSE SWITCH
The forward/reverse switch (1) is
conveniently mounted in front of the trigger
switch (2) (Fig. 1). To make the drill rotate
clockwise for drilling, push the
forward/reverse switch to the left. To make
the drill rotate counter-clockwise, push the
forward/reverse switch to the right.
NOTES:
a) Never change the position of the
forward/reverse switch while the chuck is
turning.
b) There is no dead center position for the
forward/reverse switch. The tool will run
only when it is in either the full left or full
right position.
VARIABLE-SPEED TRIGGER SWITCH
This drill is equipped with a variable-speed
ON/OFF trigger switch.
1. To start drill, gently squeeze the
trigger switch (2) (Fig. 2).
NOTE: The drill will turn at its slowest
speed when the trigger switch is
depressed slightly. The drill will turn at its
fastest speed when the trigger switch is
fully depressed.
2. To stop the drill, release the trigger
switch.
NOTE: Drilling at a slow speed for an
extended period of time may cause the drill
motor to overheat. If drill gets hot, stop
drilling and allow it to cool for at least 15
minutes.
ASSEMBLY AND OPERATING
Fig. 1
Fig. 2

13
DRILL / IMPACT SWITCH
The drill / impact switch (1) changes the
drilling mode between conventional drilling
and impact for drilling concrete. To operate
the drill in drill mode, push the drill / impact
switch to the right (Fig 3A). To operate the
drill in impact mode, push the drill / impact
switch to the left (Fig. 3B).
WARNINGS:
a) Always use a face shield, hearing
protection and a dust mask when
drilling in concrete.
b) Always use carbide tipped masonry
bits when drilling in masonry. Any other
type of bit could break and possibly
cause serious injury.
ASSEMBLY AND OPERATING
!
Fig. 3A
Fig. 3B

14
INSTALLING DRILL BITS
WARNING: Never hold the chuck
body with one hand and use the drill
power to rotate the drill body to loosen
or tighten bits. Serious injury may
result.
1. Remove drill plug from the power
source.
2. Rotate chuck collar (1) in a counter
clockwise direction until the chuck
jaws (2) open wide enough to accept
the bit (3) (Fig. 4).
3. Insert the bit into the chuck the full
length of the jaws or until the spiral
portion of the bit is near the chuck
jaws. Raise the front of your drill
slightly to prevent the bit from falling
out of the chuck jaws.
2. Tighten the chuck jaws onto the bit by
turning the chuck body in a clockwise
direction.
NOTE: Make sure the bit is properly
aligned in the jaws and NOT at an angle.
An improperly aligned bit could be thrown
from the chuck when the drill is started.
3. Finish tightening the chuck jaws by
inserting the chuck key (4) into one of
three holes (5) in the chuck body.
Rotate chuck key clockwise until drill
bit is held firmly in place by the chuck
jaws.
NOTE: Do NOT use a wrench or pliers on
the chuck key. You may damage the key
or the chuck.
ASSEMBLY AND OPERATING
!
Fig. 4

15
WARNING: Do not insert the drill
bit into the chuck and tighten as shown
in Fig. 5. The drill bit MUST be properly
inserted with all three of the chuck jaws
holding the bit centered in the chuck.
Failure to properly insert the drill bit
could cause the drill bit to be thrown
from the chuck, resulting in possible
serious injury or damage to the chuck.
REMOVING DRILL BITS
1. Remove the drill plug from the power
source.
2. Insert the chuck key into one of the
three holes in the chuck body. Rotate
the chuck key counter clockwise until
the chuck jaws release the drill bit.
NOTE: Do not use a wrench on the chuck
key or you may damage the key or chuck.
3. Remove the drill bit.
TRIGGER SWITCH LOCK
The trigger switch lock-on feature allows
the trigger switch to be locked in the ON
position at full speed when continuous
operation for extended periods of time is
required (Fig. 6).
To lock the trigger switch in the ON
position, pull back on the trigger switch (2)
to start the drill. Continue to squeeze the
trigger until the drill reaches its maximum
speed. Push the trigger switch lock button
(3) into the drill handle. Release the trigger
switch while holding the trigger switch lock
button into the drill handle. The drill will
continue to run at full speed. To release
the trigger switch lock button, pull the
trigger switch back and then release the
trigger.
ASSEMBLY AND OPERATING
!
Fig. 5
Fig. 6

16
INSTALLING THE AUXILIARY HANDLE
Install the auxiliary handle (1) for two
handed operation of the drill (Fig. 7). This
is particularly important for drilling in
concrete.
1. Rotate the auxiliary handle counter
clockwise to open mounting collar (2).
2. Slide the auxiliary handle collar over
the chuck and fully onto the drill
housing (3).
3. Rotate the auxiliary handle to a
comfortable position.
4. Rotate the auxiliary handle clockwise
to tighten the mounting collar onto the
drill housing.
NOTE: Do not over tighten the auxiliary
handle. You will break the mounting collar.
INSTALLING THE DEPTH ROD
The depth rod is used as a gauge to
control the depth of the drilled hole.
1. Rotate the auxiliary handle (1) counter
clockwise to open the mounting collar
(Fig. 8).
2. Insert the hexagonal depth rod (2) into
the matching hole in the auxiliary
handle mounting collar (3).
3. Position the depth rod so the tip (4)
will contact the workpiece when the
drill reaches the appropriate depth.
NOTE: The auxiliary handle must be
placed in the horizontal position to allow
depth rod to be inserted into the mounting
collar. Tighten the auxiliary handle by
rotating it clockwise.
ASSEMBLY AND OPERATING
Fig. 7
Fig. 8

17
ASSEMBLY AND OPERATING
For safety reasons, the operator
must read the sections of this
Owner’s Manual entitled "GENERAL
SAFETY WARNINGS", "POWER
TOOL SAFETY", "SPECIFIC SAFETY
RULES", "EXTENSION CORD
SAFETY" and "SYMBOLS" before
using this drill.
Verify the following every time the
drill is used:
1. Safety glasses, safety goggles,
or face shield is being worn.
2. Hearing protection and dust
mask are being worn when
drilling in concrete.
3. The chuck has not worked loose
on the spindle.
4. The bit is in good condition, and
is properly tightened into the
chuck.
Failure to observe these safety rules
will significantly increase the risk of
injury.
WARNING
!

18
DRILLING
When drilling into smooth, hard surfaces
such as metal, use a center punch to mark
the desired hole location. This will prevent
the drill bit from slipping off center as the
hole is started.
The workpiece to be drilled should be
secured in a vice or with clamps to keep it
from turning as the drill bit rotates
(Fig. 9).
1. Check the drill bit to make sure it is
firmly locked into the drill chuck, and
verify that the forward/reverse switch
is in the forward position.
2. Hold the drill firmly with both hands
whenever possible. Use one hand to
grasp the handle and switch.
NOTE: Make sure the hand placed on the
body of the drill does not cover the air
vents. Covering these air vents will reduce
motor cooling, and possibly lead to
overheating the motor.
3. While holding the drill firmly, place the
point of the drill bit at the point to be
drilled. Squeeze the switch trigger to
start the drill.
NOTES: As a general rule, use higher drill
speeds when drilling small holes and
slower drill speeds when drilling large
holes. When drilling in plastic, use lower
drill speeds for all drill sizes to prevent
melting the plastic.
ASSEMBLY AND OPERATING
Fig. 9

19
DRILLING –cont’d
4. Move the drill bit into the workpiece
applying only enough pressure to
keep the bit cutting. Do not force the
drill bit or apply sideways pressure to
elongate the hole.
WARNING: Be prepared for
binding and bit breakthrough. When
these situations occur, the drill bit has a
tendency to grab the workpiece. This
action will kick the drill opposite to the
direction of the drill bit rotation, and
could cause loss of control when
breaking through material as you
complete drilling the hole. If you are not
prepared, this loss of control can result
in serious injury.
When drilling metals, use light oil on the
drill bit to keep it from overheating. The oil
will prolong the life of the drill bit and
improve the cutting action. If the bit jams in
the workpiece, or if the drill stalls, release
the trigger switch immediately. Remove the
bit from the workpiece and determine the
reason for jamming.
!
ASSEMBLY AND OPERATING
Fig. 9

20
REMOVING THE CHUCK
To remove the chuck:
1. Remove the drill plug from the power
source.
2. Insert a 5/16” (8 mm) or larger hex key
(1) into the chuck (2) and tighten the
chuck jaws securely (Fig. 10). Make
sure each of the chuck jaws (3) is
seated on the flat surfaces of the hex
key.
3. Tap the hex key sharply with a mallet
(4) in a clockwise direction. This action
will loosen the screw in the chuck for
easy removal.
4. Open chuck jaws and remove the hex
key.
5. Open the chuck jaws as far as
possible.
6. Remove the chuck screw using a
#2 screwdriver (Fig. 11).
NOTE: Turn the screw CLOCKWISE to
remove it. This screw has a left-handed
thread.
7. Insert the hex key into the chuck and
tighten jaws of chuck securely
(Fig. 12). Tap the hex key sharply with
a mallet in a COUNTER-CLOCKWISE
direction. This will loosen the chuck on
the spindle. The chuck can now be
unscrewed and removed from the
spindle by hand.
ASSEMBLY AND OPERATING
Fig. 10
Fig. 11
Fig. 12