OPERATOR’S MANUALCat. No.2820-20, 49-16-28PS, 49-16-28CS, 49-16-28WSM18™ SWITCH TANK™ POWERED BASE, SPRAYER TANK ASSEMBLY,CONCRETE SPRAYER TANK ASSEMBLY, WATER SUPPLY TANK ASSEMBLY
WARNING To reduce the risk of injury, the user must read and understand the operator’s manual.
IMPORTANT SAFETY INSTRUCTIONS
WARNINGRead all safety warnings, instructions, illustrations, and specifications provided with this power tool. Failure to follow all instructions listed below 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 that may ignite dust or fumes.
- Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
ELECTRICAL SAFETY
- 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.
- Outdoor use. Do not expose to rain; store indoors.
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 a 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 a 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.
- 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 and clothing away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.
- Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.
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 at 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 remove the battery pack, if detachable, 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 and accessories. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the power tool’s operation.
- 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.
- Keep handles and grasping surfaces dry, clean, and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.
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 the 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, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
- Do not use a battery pack or tool that is damagedor modified. Damaged or modified batteries may exhibit unpredictable behavior resulting in fire, explosion, or risk of injury.
- Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 265°F (130°C) may cause an explosion.
- Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at temperatures outside the specified range may damage the battery and increase the risk of fire.
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 the tool is maintained.
- Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service providers.
SPECIFIC SAFETY RULES FOR BACKPACK SPRAYER
WARNING: Risk of fire or explosion. Do not spray flammable liquids such as gasoline, solvents, or gas-producing chemicals. Do not use tools around spark, flame, or smoke. Chemical may ignite.
- Use the correct tank for your application. These products are suitable for pesticide applications (such as insecticides, fungicides, or herbicides), fertilizers, concrete applications (such as nonflammable sealants, curing compounds, and form oil), and water supply applications when used in accordance with these instructions and those supplied with the chemicals.
- Do not use bleach, caustic (alkali) self-heating, or corrosive (acid) liquids in this sprayer. Do not pour hot or boiling liquids into the tank. These can corrode metal parts or weaken the tank and hose.
- To reduce the risk of fire, personal injury, and product damage due to a short circuit, never immerse your tool, battery pack, or charger in fluid or allow fluid to flow inside them. Do not place or store tools where they can fall or be pulled into a tub or sink. Corrosive or conductive fluids, such as seawater, certain industrial chemicals, and bleach or bleach-containing products, etc., can cause a short circuit.
- Electric shock hazard. Never spray toward electrical outlets.
- The spray area must be well ventilated to avoid hazardous fumes build-up.
- Avoid praying on windy days. Spray can be blown onto people, plants, or objects that should not be sprayed.
- Do not store chemicals in the tank. Chemicals can degrade seals and hoses. Drain and clean after each use.
- Remove gloves before handling battery packs. Chemicals are harmful to plastics.
- Maintain your power tool. Thoroughly inspect inside and outside and examine all components before each use. Check for cracked and deteriorated hoses, leaks, clogged nozzles, and missing or damaged parts. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
- Always unplug the charger and remove the battery pack from the charger or tool before performing any maintenance, storing, or draining the tool. Never disassemble the tool, battery pack, or charger. Contact a MILWAUKEE service facility for ALL repairs.
- Do not eat or smoke while handling or operating the tool. After use, wash with hot, soapy water to help reduce the risk of health hazards due to exposure to chemicals.
- Always use common sense and be cautious when using tools. It is not possible to anticipate every situation that could result in a dangerous outcome. Do not use this tool if you do not understand these operating instructions or you feel the work is beyond your capability; contact Milwaukee Tool or a trained professional for additional information or training.
- Do not use the battery compartment for storage.
- Maintain labels and nameplates. These carry important information. If unreadable or missing, contact a MILWAUKEE service facility for a free replacement.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contain chemicals known tocause cancer, birth defects, or other reproductive harm. Some examples of these chemicals are:
- lead from lead-based paint
- crystalline silica from bricks and cement and other masonry products, and
- arsenic and chromium from chemically treated lumber.Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well-ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.
SAVE THESE INSTRUCTIONSSYMBOLOGY
| Volts | |
| Direct Current | |
| Read operator’s manual | |
| Wear personal protective equipment (PPE) according to the chemical manufacturer’s instructions. | |
| Wear eye protection | |
| Wear gloves | |
| Do not spray flammable liquids | |
| UL Listing for Canada and U.S. |
FUNCTIONAL DESCRIPTION
| 1. Tank2. Tank cap3. Wand storage location4. Carry handle5. Spray wand6. Trigger lock-on ^7. Trigger handle ^8. Trigger lock-off ^9. Shoulder straps10. Hose11. Tank hook receptacle12. Waist strap13. Adjustable nozzle ^14. Nozzle holder | 15. Battery compartment16. Battery compartment latch17. Tank latch18. Flow rate dial19. On/Off switch20. On/Off light21. Water nozzle *22. Adjustable nozzle ^23. Fan nozzle ^24. Strainer25. Tank hooks26. Gallon markings27. Liter markings28. Measuring cup ¤ |
* 49-16-28WS only^ 49-16-28PS and 49-16-28CS only ¤ 49-16-28PS only
SPECIFICATIONS
Cat. No. …………………………………………….. 2820-20Volts…………………………………………………….. 18 DCBattery Type ………………………………………….M18™Charger Type…………………………………………M18™Tank Capacity ………………………………. 4 Gal. (15 L)Flow Rate …………………………….. 0.10 to 1.13 GPMFull Weight ……………………………………………..55 lbsRecommended AmbientOperating Temperature ………………..32°F to 125°FTank Only (Pesticide)……………………… 49-16-28PSTank Only (Concrete)……………………… 49-16-28CSTank Only (Water) …………………………. 49-16-28WS
ASSEMBLY
WARNING: Recharge only with the charger specified for the battery. For specific charging instructions, read the operator’s manual supplied with your charger and battery. Removing/Inserting the Battery To remove the battery, push the release buttons and pull the battery pack away from the tool.
WARNING: Always remove the battery pack before changing or removing accessories. To insert the battery, slide the pack into the body of the tool. Make sure it latches securely into place.
WARNING: Only use accessories specifically recommended for this tool. Others may be hazardous.
Connecting the Spray Wand to the Trigger Handle(Cat. No. 49-16-28PS, 49-16-28CS)
- Insert the spray wand into the trigger handle (1) until firmly seated.
- Slide the nut onto the threaded coupling and hand tighten securely (2).
- Pull-on the spray wand to be certain it is properly secured.
- Place the assembled trigger handle and wand into one of the wand storage locations.
Connecting the Nozzles(Cat. No. 49-16-28PS, 49-16-28CS)Select and screw on nozzle by job type. When using the adjustable nozzle, adjust the spray pattern as desired by tightening/loosening the nozzle.
Connecting Water Supply or Nozzle(Cat. No. 49-16-28WS)
To attach the water supply hose to the tool or nozzle, push the quick connect fitting and tool/nozzle together (1). Pull on the connection to be certain it is properly secured. To remove, pull the collar back to release (2). When using the nozzle, adjust the spray pattern as desired by tightening/loosening the nozzle
Filling the TankWARNING: Before filling the tank, remove the tank from the base.Ensure the battery door is closed and latched whenever chemicals are present.Mix chemicals per manufacturer’s instructions. Failure to follow instructions may cause harsh chemicals to injure the user or damage the tool.A removable strainer prevents debris that can clog or damage the pump from entering the tank. Label tank contents accordingly during each use. Onlyput recommended liquids in the tank. Only use water in the water supply tank.
- Ensure the battery door is closed securely.
- Remove the tank from the base and set it on a level surface away from the base to prevent exposing the base to harsh chemicals.
- Unscrew and remove the tank cap; ensure the strainer is in place.
- Fill the tank (up to 4 gallons; do not overfill). Use the gallon markings on the side of the tank as a guide. Reinstall the tank cap.
- Reinstall the tank.
Installing the Tank
- Ensure the battery door is closed securely.
- Slide tank hooks into base and seat tank into tank reservoir in the base.
- Secure tank to base with front and rear tank latches; ensuring the tank is level, firmly seated, and all seals are aligned.
WARNING: When filled, the sprayer will be heavy, take care when putting on the backpack to avoid strain.
Putting on the Backpack
- Ensure the tank is securely attached to the base with frontand rear tank latches, the tank cap is installed, and the battery door is latched.
- Pick up the backpack by one of the shoulder straps, slide your arms through each shoulder strap.
- With the sprayer on your back, tighten the shoulder and waist straps until they fit snugly and securely high on your back. Connect chest strap.
- Be sure the shoulder, chest, and waist straps are tight but comfortable; if they are too loose, the sprayer may slide around on your back, making it uncomfortable to wear.
- Be aware tank contents may shift during use and movement, such as twisting or bending over.
OPERATION
Adjusting the Flow RateSelect the desired flow rate from Low (1) to High (5), depending on the job and the chemical manufacturer’s instructions.
| FlowRate | 2820-20PS(Stream Nozzle) | 2820-20CS(Stream Nozzle) | 2820-20WS(Open Flow) |
| 1 | 0.10 GPM | 0.14 GPM | 0.16 GPM |
| 2 | 0.17 GPM | 0.21 GPM | 0.22 GPM |
| 3 | 0.24 GPM | 0.33 GPM | 0.35 GPM |
| 4 | 0.35 GPM | 0.44 GPM | 0.53 GPM |
| 5 | 0.51 GPM | 0.82 GPM | 1.13 GPM |
WARNING: To reduce the risk of injury, always wear personal protective equipment (PPE) according to the chemical manufacturer’s instructions. Always wear eye protection. Always ensure the battery compartment latch is securely closed before use. Ensure trigger handle lock-on is not engaged before turning ON tool.
Turning the Sprayer ON/OFF
- Install the battery pack. Close and latch the battery compartment.
- To turn the sprayer ON, press the ON/OFF switch to “I”. The Power LED will light green.
- To start the flow of liquid at the spray wand, pull the trigger.
- To stop the flow of liquid at the spray wand, release the trigger.
- To turn the sprayer OFF, press the ON/OFF switch to “O”.
NOTE: Be aware some spray material may remain inside the spray wand and drip out. To drain, turn off the tool, then pull the trigger and point the tool down until dripping stops.
Trigger Lock-On
(Cat. No. 49-16-28PS, 49-16-28CS)Use trigger lock-on when spraying for an extended period of time or when covering a large area.
- To lock-on, pull the trigger and push in the lock-on button.
- To release the lock-on, pull and release the trigger.
NOTE: Ensure the trigger is not locked on before turning the sprayer off to avoid accidental spraying when the sprayer is restarted.
Trigger Lock-Off
(Cat. No. 49-16-28PS, 49-16-28CS)To avoid accidental spraying, lock off the trigger.
- Press the lock-off toggle at the end of the trigger (1).
- Hook the lock-off tab onto the hook under the trigger (2).
- To release, push the tab back into the trigger.
APPLICATIONS
WARNINGBefore using any chemicals and/or solutions, read and follow all original manufacturer instructions. Read allSafety Data Sheets (SDS) and container labels provided with the chemical. Chemicals can cause serious bodily injury, property damage, and/or damage to the tool. Wear personal protective equipment (PPE) according to the chemical manufacturer’s instructions. Always wear eye protection.
Spraying
(Cat. No. 49-16-28PS, 49-16-28CS)
- Fill the tank and then install it onto the base.
- Put on the backpack and properly adjust the straps.
- Turn on the tool.
- Pull the trigger and begin sweeping the nozzle from side to side, coating the desired surface evenly in accordance with the chemical manufacturer’s instructions.
- If desired, lock on the trigger for extended use. 6. When done, release the trigger, turn off the tool, remove the backpack, drain, and clean the tank.
Supplying Water
(Cat. No. 49-16-28WS)
- Fill the tank with clean water and then install it onto the base.
- Place tool near the job within range of water supply hose.
- Attach the water supply hose with the quick connect fitting. Pull on the connection to be certain it is properly secured.
- To start water flow, turn on the tool.
- Monitor the water level in the tank. When empty, turn off the tool, disconnect the hose, and refill the tank. Don’t run the tool when the tank is empty.
- When done, turn off the tool, disconnect the hose, drain, and clean the tank.
MAINTENANCE
Maintaining ToolKeep your tool, battery pack, and charger in good repair by adopting a regular maintenance program. Inspect your tool for issues such as undue noise, misalignment or binding of moving parts, breakage of parts, or any other condition that may affect the tool operation. Return the tool, battery pack, and charger to a MILWAUKEE service facility for repair. After six months to one year, depending on use, return the tool, battery pack and charger to a MILWAUKEE service facility for inspection.If the tool does not start or operate at full power with a fully charged battery pack, clean the contacts on the battery pack. If the tool still does not work properly, return the tool, charger, and battery pack, to a MILWAUKEE service facility for repairs.WARNING: To reduce the risk of personal injury and damage, never immerse your tool, battery pack or charger in liquid or allow a liquid to flow inside them. Do not use bleach as a cleaning agent.
Cleaning
Clean dust and debris from vents. Keep handles clean, dry, and free of oil or grease. Use only mild soap and a damp cloth to clean, since certain cleaning agents and solvents are harmful to plastics and other insulated parts. Some of these include gasoline, turpentine, lacquer thinner, paint thinner, chlorinated cleaning solvents, ammonia, and household detergents containing ammonia. Never use flammable or combustible solvents around tools.
Cleaning Electrical ContactsKeep electrical contact posts between the bottom of the tank and base clean. WARNING! Remove the battery pack from tool before cleaning electrical contacts. Clean contacts with a dry, clean cloth only.
WARNING: To reduce the risk of injury, always wear personal protective equipment (PPE) according to the chemical manufacturer’s instructions.Always wear eye protection.Draining and Cleaning the Tank, Hose, and Spray WandIf there is any liquid left in the tank after spraying, the tank should be drained before cleaning. Do not store chemicals in the tank. The tank must be cleaned before using another liquid. Do not mix liquids. Follow the chemical manufacturer’s instructions for proper cleaning, storage, and/or disposal of excess liquid.To Drain:
- Ensure the battery door is closed securely.
- Remove the tank from the base.
- Empty the tank into a suitable container through the fill area. WARNING! Always wear personal protective equipment (PPE) according to the chemical manufacturer’s instructions. Always wear eye protection.
To Clean:
- Ensure the battery door is closed securely.
- Remove the tank from the base and set on a level surface away from the base to prevent exposing the base to harsh chemicals.
- Remove the tank and fill it about one-third full with clean water. A small amount of mild household detergent may be added. Replace the cap andgently slosh the water around the tank.
- Install the tank and spray the water until the tank has been emptied. Make sure to direct the spray toward an area that will not be damaged by residue chemicals in the tank.
- Repeat the procedure with clean water until the tank is thoroughly clean. Wash outside of nozzles and dry with cloth.
- Wipe the outside of the tank with a clean, dry cloth.
- Allow all pieces to completely dry before reinstalling parts and storing the unit. Always reinsert the strainer before replacing the tank cap.
StorageStore indoors. Store spray wand securely in the wand storage area. Store the sprayer in a secure, well-ventilated indoor space with the tank empty.RepairsFor repairs, return the tool, battery pack, and charger to the nearest authorized service center.
ACCESSORIES
WARNINGUse only recommended accessories. Others may be hazardous.For a complete listing of accessories, go online to www.milwaukeetool.com or contact a distributor.
WIRELESS COMMUNICATION
For products provided with wireless communication features, including ONE-KEY™:Pursuant to part 15.21 of the FCC Rules, do not modify this product. Modification could void your authority to operate the product. This device complies with part 15 of the FCC Rules and ISED-Canada’s license-exempt RSS standards. Operation is subject to the following two conditions: 1) This device may not cause harmful interference, and 2) This device must accept any interference received, including interference that may cause undesired operation.
SERVICE – UNITED STATES
1-800-SAWDUST (1.800.729.3878) Monday-Friday, 7:00 AM – 6:30 PM CST or visit www.milwaukeetool.comContact Corporate After Sales Service Technical Support with technical, service/repair, or warranty questions.Email: [email protected]Become a Heavy Duty Club Member at www.milwaukeetool.com to receive important notifications regarding your tool purchases.
SERVICE – CANADAMilwaukee Tool (Canada) Ltd1.800.268.4015Monday-Friday, 7:00 AM – 4:30 PM CST or visit www.milwaukeetool.ca
LIMITED WARRANTY USA & CANADA
Every MILWAUKEE Outdoor Power Equipment Product* (see exceptions below) is warranted to the original purchaser only to be free from defectsin material and workmanship. Subject to certain exceptions, MILWAUKEE will repair or replace any part on an outdoor power equipment productwhich, after examination, is determined by MILWAUKEE to be defective in material or workmanship for a period of three (3) years.** after the date of purchase unless otherwise noted. Return of the outdoor power equipment to a MILWAUKEE factory Service Center location or participating MILWAUKEE authorized Service Station, freight prepaid and insured, is required. A copy of the proof of purchase should be included with the returned product. This warranty does not apply to damage that MILWAUKEE determines to be from repairs made or attempted by anyone other than MILWAUKEE authorized personnel, misuse, alterations, abuse, normal wear and tear, lack of maintenance, or accidents.Normal Wear: Many outdoor power equipment products need periodic parts replacement and service to achieve the best performance. This warranty does not cover repair when normal use has exhausted the life of a part including, but not limited to trimmer head, trimmer head spool, cutting lines, blades, chains, blower tubes, rushes, o-rings, and seals. *This warranty does not cover Cordless Battery Packs or Reconditioned products. There are separate and distinct warranties available for these products.**The warranty period for SWITCH TANK™ tank assemblies, hoses, handles, and wands is one (1) year from the date of purchase. MILWAUKEE does not cover freight or labor charges associated with the inspection and testing of outdoor power equipment products which are found by MILWAUKEE not to be a valid warranty claim. A valid warranty claim must be substantiated by the discovery of defective material or workmanship by MILWAUKEE.ACCEPTANCE OF THE EXCLUSIVE REPAIR AND REPLACEMENT REMEDIES DESCRIBED HEREIN IS A CONDITION OF THE CONTRACT FOR THE PURCHASE OF EVERY MILWAUKEE PRODUCT. IF YOU DO NOT AGREE TO THIS CONDITION, YOU SHOULD NOT PURCHASE THE PRODUCT. IN NO EVENT SHALL MILWAUKEE BE LIABLE FOR ANY INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR ANY COSTS, ATTORNEY FEES, EXPENSES, LOSSES, OR DELAYSALLEGED TO BE AS A CONSEQUENCE OF ANY DAMAGE TO, FAILURE OF, OR DEFECT IN ANY PRODUCT INCLUDING, BUT OT LIMITED TO, ANY CLAIMS FOR LOSS OF PROFITS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS WARRANTIES, WRITTEN OR ORAL. TO THE EXTENT PERMITTED BY LAW, MILWAUKEE DISCLAIMS ANY IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE; TO THE EXTENT SUCH DISCLAIMER IS NOT PERMITTED BY LAW, SUCH IMPLIED WARRANTIES ARE LIMITED TO THE DURATION OF THE APPLICABLE EXPRESS WARRANTY AS DESCRIBED ABOVE. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONGAN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU, THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.This warranty applies to products sold in the U.S.A. and Canada only. Please consult the ‘Service Center Search’ in the Parts & Service section of MILWAUKEE’s website www.milwaukeetool.com or call 1.800.SAWDUST (1.800.729.3878) to locate your nearest service facility for warranty and non-warranty service on a Milwaukee electric power tool.MILWAUKEE TOOL13135 West Lisbon RoadBrookfield, WI 53005 USA58140137d501610300601Q-01(A)10/20Printed in China
References
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