Buffalo Tools CGGUN20 Quick reference guide

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CGGUN20
20V Cordless Grease Gun
Assembly & Operating Instructions
READ ALL INSTRUCTIONS AND WARNINGS BEFORE USING THIS PRODUCT.
This manual provides important information on proper operation & maintenance. Every effort has been
made to ensure the accuracy of this manual. These instructions are not meant to cover every possible
condition and situation that may occur. We reserve the right to change this product at any time without
prior notice.
IF THERE IS ANY QUESTION ABOUT A CONDITION BEING SAFE OR UNSAFE, DO
NOT OPERATE THIS PRODUCT!
HAVE QUESTIONS OR PROBLEMS? CONTACT CUSTOMER SERVICE.
If you experience a problem or need parts for this product, visit our website http://www.buffalotools.com
or call our customer help line at 1-636-532-9888, Monday-Friday, 8 AM - 4 PM Central Time. A copy of
the sales receipt is required.
FOR CONSUMER USE ONLY – NOT FOR PROFESSIONAL USE.
KEEP THIS MANUAL, SALES RECEIPT & APPLICABLE WARRANTY FOR FUTURE
REFERENCE.

CGGUN20 Cordless Grease Gun Assembly & Operating Instructions
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GENERAL SAFETY RULES FOR ALL ELECTRIC POWER TOOLS
READ AND UNDERSTAND ALL INSTRUCTIONS. Failure to follow all instructions listed below may
result in electric shock, fire and/or serious personal injury.
RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS
What You Need to Know About Safety Instructions
Warning and Important Safety Instructions appearing in this manual are not meant to cover all possible conditions
and situations that may occur. Common sense, caution and care must be exercised when operating or cleaning
tools and equipment.
Always contact your dealer, distributor, service agent or manufacturer about problems or conditions you do not
understand.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which,
if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which,
if not avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may
result in property damage.
NOTE provides additional information that is useful for proper use
and maintenance for this tool. If a NOTE is indicated make sure it
is fully understood.

CGGUN20 Cordless Grease Gun Assembly & Operating Instructions
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IMPORTANT SAFETY INSTRUCTIONS
WORK AREA
Keep your work area clean and well lit. Cluttered work benches and dark work areas may cause accidents or injury.
Do not operate power tools in explosive areas, such as in the presence of flammable liquids, gases or dust. Power tools create
sparks which may ignite the dust or fumes.
Keep bystanders, children and visitors away while operating a power tool. Distractions can cause you to lose control.
TOOL USE & CARE
!
Use clamps or other practical ways to secure and support the workpiece to a stable platform. Holding the work by hand or
against your body is unstable and may lead to loss of control.
Do not force tool. Use the correct tool for your application. The correct tool will do the job better and safer at the rate for which it is
designed.
Do not use the tool if the power switch does not turn it “ON” or “OFF”. Any tool that cannot be controlled with the switch is
dangerous and must be repaired.
Store idle tools out of reach of children and other untrained persons. Tools are dangerous in the hands of untrained users.
People with pacemakers or other electronic devices should consult with a physician before operating this product. Interruption
or failure of the pacemaker could occur when electrical equipment is operated within close proximity of electrical devices.
Inhaling dust created as a result of construction projects could be hazardous to your health. Construction dust may contain
chemicals, which are known to cause cancer, birth defects and other reproductive harm in the State of California.
These chemicals could be, but are not limited to: lead from lead based paints, crystalline silica from bricks or cement, arsenic, and
chromium from chemically treated-lumber.
To reduce your risk of exposure to harmful materials: always wear a dust mask that is designed to filter out hazardous microscopic
contaminants, always work in a well ventilated area, and wear other approved safety equipment.
WARNING: CALIFORNIA PROP 65: According to the State of California, this product contains or emits chemicals known to cause
cancer, birth defects and other reproductive harm. Wash hands after handling the power cord. Touching the power cord could
expose you to lead, which is known in the State of California to cause cancer, birth defects and other reproductive harm.
All work areas should be clean and well lit. Accidents are more likely to occur in poorly lit and cluttered areas.
Do not operate power tools in the presence of flammable liquids, gas, or dust. Sparks created from the power tool could ignite
flammable materials.

CGGUN20 Cordless Grease Gun Assembly & Operating Instructions
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Keep children, and other distractions at a distance while operating power tools.
Use common sense while operating this power tool.
Do not use this tool if you are:
•Feeling tired or are under the influence of alcohol or drugs.
•Wearing loose clothing or jewelry. Keep long hair pulled back and away from moving parts.
•Overreaching or have improper footing. Handling the tool in this way could cause serious injury.
When using this power tool always:
•Wear the proper safety equipment, such as safety goggles, dust masks, non-skid shoes, etc.
Follow these steps to maintain safe working conditions and good working condition of power tools. Improper care can result in
electric shock or serious injury.
•Secure and support the work piece using clamps. Do not use your hands to hold the piece in place.
•Use the correct tool for the job. Using the correct tool is safer and faster.
•Make sure the power switch is in good working order. If the power switch no longer turns the tool “ON” or “OFF”,
discontinue use, and have the tool replaced or repaired.
•Keep out of reach of children, or any untrained person. Store tools in a safe and dry place.
•Keep tools clean, and cutting tools sharp. Maintaining tools with proper care will increase the life of the power tool, and
reduce the risk of injury.
•Check to be sure all moving parts are free from binding and are properly aligned.
•Use only accessories that are recommended by the manufacturer for your tool model.
Only qualified repair personnel must perform tool service. Service or maintenance performed by unqualified personnel could result in
a risk of injury.
Safety glasses and ear protection must be worn during operation.
SERVICE
Tool service must be performed only by qualified repair personnel. Service or maintenance by unqualified personnel could result in a
risk of injury.
When servicing a tool, use only identical replacement parts. Follow instructions in the Maintenance section of this manual. Use
of unauthorized parts or failure to follow Maintenance Instructions may create a risk of shock or injury.

CGGUN20 Cordless Grease Gun Assembly & Operating Instructions
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IMPORTANT SAFETY INSTRUCTIONS
Before using you need to become familiar with the operation of the tool. If you are unsure about the operation of the tool, or have
any questions about the proper use of the tool, call Customer Service at 1-888-287-6981.
Follow these instructions for safe handling of the tool:
•Always secure and support the work piece using clamps. Do not use your hands to hold the piece in place.
•Do not use solvents containing carbon tetrachloride, ammonia or acetone to clean the tool. Never use gasoline, paint
thinner, or other caustic chemicals that can damage the plastic parts of the tool.
•Always use the appropriate safety gear when operating this tool. Including but not limited, to goggles, dust mask or
respirator. Always work in a well-ventilated area to reduce your exposure to harmful chemicals and dust particles.
FEATURES
• Single Speed
• 8000 PSI
• Flow Rate 3 oz / min
• Barrel Capacity: 14 oz Cartridge
• Rechargeable 1500 MAH Lithium ion
• Includes One 20V Battery Pack
• 30" Flexible Hose
COMPONENTS
Observe the locations and functions of the various
components and controls of this tool.
3
1) Vent valve (not visible)
2) Vent valve
3) Grease tube
4) Hose
5) Coupler
6) 6A) Follower rod
6B) Handle
7) Battery pack
8) Handle
9) Trigger
2
6B
7
1
4
5
8
9
6A

CGGUN20 Cordless Grease Gun Assembly & Operating Instructions
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BATTERY CHARGER
Unplug the battery power source before assembly, adjustments, or adding/removing accessories.
The Battery Pack’s terminals will fit this Charger only. Do not use the Battery Pack if it does not fit the Charger. Do not force a Battery Pack
into the Charger.
For best performance on a new battery you must discharge it completely to get full use of the batteries life cycle. Using a battery that has
been charged before it is completely discharged will shorten the batteries total amount of charge it will take in future charging. Be sure to
discharge the new battery completely before charging. All New grease guns come with 80% charge from the factory and no charging is
needed until it is used and the battery is completely discharged.
NORMAL CHARGING
CAUTION: Charge the battery pack in clean and dry location. Do not charge the battery pack in air temperatures below 48°F (9°C) or above
105°F (41°C).
CAUTION: Make sure power circuit voltage is the same as the shown on the charger specification.
1. Remove the battery pack from the cordless grease gun by depressing the button on the battery pack.
2. Plug the charger into power outlet before inserting battery pack.
3. Insert battery pack in to charger. Lights on charger indicate the charging process as below:
GREASE GUN OPERATION
Unpack product from package and review contents. Keep all packaging until product has been reviewed.
Loading the Grease Gun with a Grease Cartridge
1. Turn the screw counterclockwise to open the Vent Valve.
2. Grip the Follower Rod Handle and pull it until the Follower Rod is extended. Pull the Follower Rod sideways to latch it into the slot on
the end cap of the Grease Tube, locking it open.
3. Remove the Grease Tube from the Pump Housing.
4. Remove the plastic cap from a grease cartridge (not included), and insert the cartridge into the Grease Tube.
5. Remove the pull tab from the grease cartridge and screw the Grease Tube back into the Pump Housing.
Release Follower Rod from the slot on the end cap of the Grease Tube to allow the Follower Rod to move forward into the Grease Tube.
7. Once the Grease Gun is loaded, prime Gun and expel any air pockets as follows:
a. Close the Vent Valve.
b. Squeeze the Trigger several times to operate the Grease Gun until any trapped air is expelled and grease flows smoothly from the
Coupler.
c. Push the Follower Rod all the way into the Grease Tube. Gun is now primed and ready for use.

CGGUN20 Cordless Grease Gun Assembly & Operating Instructions
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Loading the Grease Gun from a Bulk Container
1. Unscrew and remove the Grease Tube from the Pump Housing.
2. Insert the open end of Grease Tube into lubricant. Slowly pull the Follower Rod back while pushing the Grease Tube deeper into the
lubricant to prevent air pockets from being pulled into the Grease Tube.
3. When Follower Rod is fully extended, pull it sideways to latch the Rod into the slot on the end cap of the Grease Tube, locking it open.
4. Screw the Grease Tube into the Pump Housing.
5. Release the Follower Rod from the slot on the end cap of the Grease Tube to allow Follower Rod to move forward into Grease Tube.
6. Clean any excess grease off the outer body of the Grease Gun.
7. Once the Grease Gun is loaded, prime Gun and expel any air pockets as follows:
a. Close the Vent Valve.
b. Squeeze Trigger several times to operate the Grease Gun until any trapped air is expelled and grease flows smoothly from Coupler.
c. Push the Follower Rod all the way into the Grease Tube. Gun is now primed and ready for use.
General Operating Instructions
1. Make sure that the Trigger is in the off‑position, then attach the Battery Pack.
2. Insert the fully charged Battery Pack into the base of the Tool, making sure that it clicks into place securely. Be sure the Battery Pack
is securely seated into the Grease Gun Handle so it does not fall off during use.
3. Always clean the zerk (grease) fitting carefully and completely with a clean cloth prior to inserting the Grease Gun’s Coupler onto the
zerk (grease) fitting.
4. Insert Coupler fully onto the clean grease zerk fitting of the object to be lubricated. Make sure that Coupler is fully seated on
the zerk fitting.
5. Squeeze the Trigger several times or until a small amount of grease begins to flow out of the greased bushing.
6. Remove Coupler from the zerk (grease) fitting, and wipe excess grease from the exterior of the zerk (grease) fitting, Hose, and Coupler.
7. To prevent accidents, turn off the tool and remove its Battery Pack after use. Clean, then store the Grease Gun and accessories in a
dry, indoor area out of children’s reach.
Warning! TO REDUCE THE RISK OF SERIOUS INJURY FROM INJECTION:
It may be necessary to hold the Coupler in place on the zerk (grease) fitting while lubricating. Hold the end of the hose by the spring guard
only. Keep hands away from exposed rubber part of hose.
Cleaning, Maintenance, and Lubrication
1. BEFORE EACH USE, inspect the general condition of the tool. Check for:
• leaking, swollen, or cracked Battery Pack
• damaged Hose
• loose hardware
• misalignment or binding of moving parts
• cracked or broken parts
• damaged electrical wiring
• any other condition that may affect its safe operation.
AFTER USE, wipe external surfaces of the tool with clean cloth to remove all dirt, grease, and debris. Do not use solvents to clean the
Grease Gun. Do not immerse the Grease Gun in any liquids.
3. WARNING! If the supply cord of the Charger is damaged, it must be replaced.
4. Disconnect Battery Pack and place Battery Pack, Charger, and Grease Gun in a dry, indoor area out of reach of children.

CGGUN20 Cordless Grease Gun Assembly & Operating Instructions
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TROUBLESHOOTING
MAINTENANCE
Disconnect the power supply before cleaning. Wear safety eyewear before cleaning. Use compressed dry air to blow off dust
and debris. Use a soft bristle brush if compressed air is not available.
Applying excessive force to the tool can overload the motor, decrease the life and increase the wear on the tool.
Some chemicals damage the product. Do not use harsh chemicals such as gasoline, carbon tetracholiride, paint thinner, etc.
A qualified repair technician must perform any tool service or repair. Service or maintenance performed by unqualified personnel
could result in injury. Use only identical replacement parts. Use of unauthorized parts or failure to follow maintenance instructions may
create a risk of electric shock or injury.
Do not make contact with a grounded surface while using this power tool. Contact with surfaces like pipes, radiators or major
appliances increases your risk of electric shock.
Use only mild soap and a slightly damp cloth to clean the tool.
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