MasterCraft 054-4273-8 User manual

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model no. 054-4273-8
20V max* LITHIUM-ION
CORDLESS IMPACT RATCHET
IMPORTANT:
Read and understand this instruction manual thoroughly
before using the product.
INSTRUCTION
MANUAL

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TABLE OF CONTENTS
Technical Specifications 4
Safety Guidelines 5
Key Parts Diagram 10
Assembly Instructions 11
Operating Instructions 12
Maintenance 14
Troubleshooting 15
Parts List 16
Warranty 18
NOTE:
If any parts are missing or damaged, or if you have any questions,
please call our toll-free helpline at 1-800-689-9928.
SAVE THESE INSTRUCTIONS
• This manual contains important safety and operating instructions. Read all
instructions and follow them with use of this product.
TABLE OF CONTENTS

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TECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Motor 20V DC
No-load speed 0-250 RPM
Maximum torque (normal mode) 41 ft-lb (55 Nm)
Maximum torque (impact mode) 48 ft-lb (65 Nm)
Drive 3/8" (10 mm) Square
Impact ratchet weight (without battery) 2 lb 10 oz (1.2 kg)
Batteries 20V max* (1.5 Ah) Li-ion (054-3124-0; sold separately)
20V max* (3.0 Ah) Li-ion (054-3125-8; sold separately)
* Maximum battery voltage without workload; with workload nominal voltage is 18V.

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SAFETY GUIDELINES:
WARNING!
Safety symbols in this instruction manual are used to flag possible dangers. The safety
symbols and their explanations require your full understanding. The safety warnings do not,
by themselves, eliminate any danger, nor are they substitutes for proper accident prevention
measures.
WARNING!
This safety alert symbol indicates caution, warning, or danger. Failure to obey a safety
warning can result in serious injury to yourself or others. To reduce the risk of injury, fire, or
electric shock, always follow the safety precautions.
KNOW YOUR TOOL
To operate this tool, carefully read this instruction manual and all labels affixed to the cordless impact
ratchet before using. Keep this manual available for future reference.
IMPORTANT
This tool should only be serviced by a qualified service technician. For more information, call the
toll-free helpline at 1-800-689-9928.
READ ALL INSTRUCTIONS THOROUGHLY
SAVE THESE INSTRUCTIONS
GENERAL POWER TOOL SAFETY WARNINGS
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.
The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-
operated (cordless) power tool.
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.
SAFETY GUIDELINES

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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 ground fault circuit
interrupter (GFCI) protected supply. Use of a 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 energising power tools that have the
switch on invites accidents.
• 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 jewellery. Keep your hair, clothing and
gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving
parts.
• If devices are provided for the connection of dust extraction and collection facilities,
ensure that these are connected and properly used. Use of these devices can reduce dust-
related hazards.
SAFETY GUIDELINES

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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 more safely 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, 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.
BATTERY TOOL USE AND CARE
• Recharge only with the charger specified by the manufacturer. A charger that is suitable
for one type of battery pack may create a risk of fire when used with another battery pack.
• Use power tools only with specifically designated battery packs. Use of any other battery
packs may create a risk of injury and fire.
• When battery pack is not in use, keep it away from other metal objects like paper
clips, coins, keys, nails screws or other small metal objects that can make a
connection from one terminal to another. Shorting the battery terminals together may cause
burns or a fire.
• Under abusive conditions, liquid may be ejected from the battery; avoid contact.
If contact accidentally occurs, flush with water. If liquid contacts eyes, also seek
medical help. Liquid ejected from the battery may cause irritation or burns.
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.
SAFETY GUIDELINES

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SAFETY GUIDELINES FOR CORDLESS IMPACT RATCHET
• To reduce the risk of electric shock or damage to the charger and battery, use only the
batteries and charger listed.
BATTERY PACK CHARGER
054-3124-0, 054-3125-8 054-3126-6
• Hold power tool by insulated gripping surfaces, when performing an operation where
the cutting accessory may contact hidden wiring. Cutting accessory contacting a “live”
wire may make exposed metal parts of the power tool “live” and could give the operator an
electric shock.
• Use clamps or another practical way to support and secure the workpiece to a stable
platform. Holding the work by hand or against your body is unstable and may lead to loss of
control.
• Avoid overload working. Do not always use the impact model to raise the torque.
• Do not touch bits, sockets, ratchet component and workpiece immediately after use.
They may be very hot and could burn skin, wear gloves when touching them after use.
• Do not drill, fasten or break into existing walls or other blind areas where electrical
wiring may exist. If this situation is unavoidable, disconnect all fuses or circuit breakers feeding
the worksite.
• Wear safety goggles or eye protection when using this tool.
• Wear ear protectors when using the tool for extended periods. Prolonged exposure to high
intensity noise can cause hearing loss.
• Avoid accidental starting. Be sure that the lock button is on the “off”position before
inserting the battery pack. Carrying appliances with your finger on the switch or inserting the
battery pack into an appliance with the switch on invites accidents.
• Remove the battery pack before changing accessories. Accidental starting may occur
because battery appliances with a battery inserted are in the operative condition.
• Be prepared for a reaction torque when
“seating” or removing a fastener. The tool
housing may tend to twist in the opposite direction of the bit rotation when “seating” or
removing a fastener, depending on the torque setting of the tool.
• Do not use worn or damaged impact sockets and accessories. When installing an
accessory, insert the impact socket well onto the anvil. Be sure that the anvil has locked onto the
socket correctly.
• The label on your tool may include the following symbols. The symbols and their
definitions are as follows:
V ..................... Volts
A ..................... Amperes
Hz ................... Hertz
SAFETY GUIDELINES

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W .................... Watts
min ................. Minutes
................. Alternating current
............. Direct current
n0 ................... No-load speed
............... Class II Construction
…/min ........... Revolutions or reciprocation per minute
............... Grounding terminal
BPM ............... Beats per minute
.............. WARNING – To reduce the risk of injury, user must read instruction manual.
.............. WARNING – To reduce the risk of injury always wear eye protection.
.............. WARNING – To reduce the risk of injury always wear ear protection.
SAFETY GUIDELINES

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PACKAGE CONTENTS:
Cordless impact ratchet, instruction manual.
KEY PARTS DIAGRAM
6
1 2 3 4
5
No. Description No. Description
1 Paddle switch 4 3/8" (10 mm) square anvil
2 Lock button 5 Forward/reverse toggle
3 LED worklight 6 Impact/normal mode button
Before attempting to use this tool, become familiar with all of its operating features and safety requirements.
For optimum performance and safety, read the following operating instructions carefully before using.
KEY PARTS DIAGRAM
WARNING!
• Remove the cordless impact ratchet from the package and examine it carefully. Do not discard the carton or any packaging
material until all parts have been examined.
• If any part of the impact ratchet is missing or damaged, do not attach the battery pack to the tool or use the tool until the part
has been repaired or replaced. Failure to heed this warning could result in serious injury.
• Do not allow familiarity with the cordless impact ratchet to cause a lack of alertness. A fraction of a second of carelessness is
enough to cause severe injury.
• Carefully read the instruction manuals for your Mastercraft®20V max Lithium-ion battery and Mastercraft®20V max Lithium-
ion charger for safety and operation instructions.
FPO

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ASSEMBLY INSTRUCTIONS
TO ATTACH BATTERY PACK (fig 1)
1. Turn off the lock button.
2. Align the raised portion on the battery pack with the
groove on the bottom of the tool, then silde the battery
pack into the body of the tool.
3. Make sure that the battery latches securely.
TO DETACH BATTERY PACK (fig 1)
1. Make sure that the lock button is turned off.
2. Depress the battery-release button located on the front of the battery pack to release the battery pack.
3. Pull the battery pack forward to remove it from the tool.
INSTALLING AND REMOVING
A SOCKET (fig 2)
1. Make sure that the lock button is turned off.
2. To install a socket, slide it onto the drive anvil and
simply push it until it locks in place.
3. To remove a socket, pull it off the anvil.
•
ASSEMBLY INSTRUCTIONS
CAUTION!
• Avoid the possibility of accidental starting. Always make sure that the lock button is turned off when you
are attaching the battery pack or performing other adjustments to the tool.
• Bits, sockets and tools get hot during operation. Wear gloves when touching them after use.
• Only use sockets designed for impact ratchet. Other sockets could break and result in user injury. Inspect a
socket prior to use to ensure that they have no cracks or other visible damage.
FPO
NOTICE: When placing a battery pack on the tool, be sure that the raised rib on the battery pack aligns with the groove on
the cordless impact ratchet and the latches snap into place properly. Improper assembly of the battery pack can cause damage
to internal components.
fig 2
fig 1 Latch
ATTACH
DETACH

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OPERATING INSTRUCTIONS
TURNING THE IMPACT RATCHET ON AND
OFF (fig 3 & 4)
1. Release the lock button by pushing it forward.
2. To start the tool, press the paddle switch.
3. To stop the tool, release the paddle switch.
4. Lock the impact ratchet off by moving the lock button
back.
FORWARD/REVERSE TOGGLE (fig 5)
1. For forward rotation, rotate the forward/reverse toggle
counter-clockwise.
2. For reverse rotation, rotate the forward/reverse toggle
clockwise.
OPERATING INSTRUCTIONS
NOTICE: Check the direction of rotation before use.
fig 3 Lock button
ON
OFF
fig 4 Press the paddle
switch
fig 5
Reverse
Forward

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LED WORKLIGHT (fig 6)
The LED worklight will illuminate when the paddle
switch is pressed. This provides additional light on
the surface of the workpiece for operation in lower
light situations. The LED worklight will will remain on
for 10 seconds after the paddle switch is released.
IMPACT/NORMAL MODE
SELECTION (fig 7)
1. Move the lock button to turn the tool on, then press the
impact/normal mode button.
2. When the green light is on, the tool is in impact mode;
when the green light is off, the tool is in normal mode.
TIGHTENING HEX BOLTS AND NUTS (fig 8)
1. Install the correct socket to match the hex bolt or nut.
2. Apply just enough pressure to keep the socket engaged
on the hex bolt or nut.
3. Position the forward/reverse toggle in the correct
position for forward rotation.
4. Initially apply minimal pressure to the paddle switch.
Increase the speed only when full control can be
maintained.
LOOSENING HEX BOLTS AND NUTS (Fig 8)
1. Install the correct socket to match the hex bolt or nut.
2. Apply just enough pressure to keep the socket engaged
on the hex bolt or nut.
3. Position the forward/reverse toggle in the correct
position for reverse rotation.
4. Initially apply minimal pressure to the paddle switch. Increase the speed only when full control can be
maintained.
OPERATING INSTRUCTIONS
NOTICE:
• Mode selection requires that the lock button is in the ON position.
• The impact/normal mode setting won’t change after you turn off the tool or change the battery pack. Always check to make
sure that the tool is in the desired mode when you start the tool.
• Do not use the impact mode for long periods of continuous working, this can reduce the life of the impact ratchet.
• Do not over-tighten, as the force of the auto ratchet can break the fastener. Keep the socket at a right angle to the fastener
to avoid damaging the fastener head.
fig 6
LED worklight
fig 7 Impact/Normal
Mode Button
fig 8
Forward/Reverse
Toggle
Forward
Reverse

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MAINTENANCE
BEFORE EACH USE:
The tool may be cleaned most effectively with compressed dry air. Always wear safety goggles when
cleaning tools with compressed air.
1. Inspect the cordless impact ratchet, the paddle switch, and the battery for damage.
2. Check for damaged, missing, or worn parts.
3. Check for loose screws, misalignment or binding of moving parts, or any other condition that may affect
the operation.
4. If abnormal vibration or noise occurs, turn the cordless impact ratchet off immediately, and have the
problem corrected before further use.
MAINTENANCE
WARNING!
• To avoid personal injury, always remove the battery pack from the tool when cleaning or performing any maintenance.
• Do not let brake fluids, gasoline, petroleum-based products, penetrating oil, etc. come into contact with plastic parts. These
substances contain chemicals that can damage, weaken, or destroy plastic.
• When servicing, use only identical replacement parts. The use of any other parts may create a hazard or cause damage to
the product.
• Use only accessories that are recommended for this impact ratchet. Accessories that may be suitable for one tool may
become hazardous when used with another tool.
• To ensure safety and reliability, all repairs should be performed by a qualified service technician.
FPO

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TROUBLESHOOTING
Problem Possible Causes Solution
The impact ratchet does not
work. The battery is depleted. Charge the battery.
The socket cannot be installed. The socket is not the proper
size.
Use with the sockets sutiable
for a 3/8" (10 mm) square drive.
LED light is flashing. The tool is overheating. Allow the tool to cool to room
temperature.
Ratchet component is
overheating.
Continuous heavy use is
causing the tool to overheat.
Allow the tool to cool to room
temperature.
If the problem remains unsolved after performing the checks described above, call the toll-free helpline
at 1-800-689-9928.
TROUBLESHOOTING

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EXPLODED VIEW
PARTS LIST

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No. Part No. Description No. Part No. Description
1 2824286000 Ratchet Assembly 12 3520748000 Pinion
2 3421726000 Gear Case 13 5620062000 Screw
3 5620498000 Screw 14 2730231000 DC Motor
4 3520674000 Impact Block 15 2830099000 Electric Assembly
5 3520873000 Carrier 16 3128135000 Button
6 3520750000 Planet Gear 17 3321973000 Right Housing Assembly
7 3520872000 Ring Gear 18 3127140000 Lock Button
8 5650524000 Washer 19 5610013000 Screw
9 3128134000 Adjusting Sleeve 20 5670246000 Spring Pin
10 3421711000 Gear Case Cover 21 3705544000 Switch Trigger
11 3321974000 Left Housing Assembly
If any parts are missing or damaged, or if you have any questions, please call the toll-free helpline at
1-800-689-9928.
PARTS LIST

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This Mastercraft product is guaranteed three (3) years from the date of original retail purchase
against defects in materials and workmanship, except for the following components:
a) Component A: Batteries, chargers and carrying case, which are guaranteed for a period of 2 years from
the date of original retail purchase against defects in workmanship and materials;
b) Component B: Accessories, which are guaranteed for a period of 1 year from the date of original retail
purchase against defects in workmanship and materials.
Subject to the conditions and limitations described below, this product, if returned to us with proof
of purchase within the stated warranty period and if covered under this warranty, will be repaired or
replaced (with the same model, or one of equal value or specification), at our option. We will bear the
cost of any repair or replacement and any costs of labour relating there to.
These warranties are subject to the following conditions and limitations:
a) a bill of sale verifying the purchase and purchase date must be provided;
b) this warranty will not apply to any product or part thereof which is worn or broken or which has become
inoperative due to abuse, misuse, accidental damage, neglect or lack of proper installation, operation or
maintenance (as outlined in the applicable owner’s manual or operating instructions) or which is being
used for industrial, professional, commercial or rental purposes;
c) this warranty will not apply to normal wear and tear or to expendable parts or accessories that may be
supplied with the product which are expected to become inoperative or unusable after a reasonable
period of use;
d) this warranty will not apply to routine maintenance and consumable items such as, but not limited to, fuel,
lubricants, vacuum bags, blades, belts, sandpaper, bits, fluids, tune-ups or adjustments;
e) this warranty will not apply where damage is caused by repairs made or attempted by others (i.e. persons
not authorized by the manufacturer);
f) this warranty will not apply to any product that was sold to the original purchaser as a reconditioned or
refurbished product (unless otherwise specified in writing);
g) this warranty will not apply to any product or part thereof if any part from another manufacturer is
installed therein or any repairs or alterations have been made or attempted by unauthorized persons;
WARRANTY

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h) this warranty will not apply to normal deterioration of the exterior finish, such as, but not limited to,
scratches, dents, paint chips, or to any corrosion or discolouring by heat, abrasive and chemical cleaners;
and
i) this warranty will not apply to component parts sold by and identified as the product of another company,
which shall be covered under the product manufacturer’s warranty, if any.
Additional Limitations
This warranty applies only to the original purchaser and may not be transferred. Neither the retailer nor
the manufacturer shall be liable for any other expense, loss or damage, including, without limitation,
any indirect, incidental, consequential or exemplary damages arising in connection with the sale, use or
inability to use this product.
Notice to Consumer
This warranty gives you specific legal rights, and you may have other rights, which may vary from
province to province. The provisions contained in this warranty are not intended to limit, modify, take
away from, disclaim or exclude any statutory warranties set forth in any applicable provincial or federal
legislation.
Made in China
Imported by
Mastercraft Canada Toronto, Canada M4S 2B8
WARRANTY