OPERATOR'S MANUAL
MANUEL de L'UTILISATEUR
MANUAL del OPERADOR
Cat. No. / No de cat.
2820-20, 49-16-28PS, 49-16-28CS, 49-16-28WS
M18™ SWITCH TANK™ POWERED BASE, SPRAYER TANK ASSEMBLY,
CONCRETE SPRAYER TANK ASSEMBLY, WATER SUPPLY TANK ASSEMBLY
BASE ÉLECTRIQUE SWITCH TANK™ M18™, ENSEMBLE RÉSERVOIRPULVÉRISATEUR, ENSEMBLE RÉSERVOIR-PULVÉRISATEUR POUR
BÉTONNAGE, ENSEMBLE RÉSERVOIR-PULVÉRISATEUR POUR VERSAGE
D’EAU
BASE MOTORIZADA SWITCH TANK™ M18™, CONJUNTO DE TANQUE
ROCIADOR, CONJUNTO DE TANQUE ROCIADOR DE CONCRETO,
CONJUNTO DE TANQUE DE SUMINISTRO DE AGUA
WARNING To reduce the risk of injury, user must read and understand operator's manual.
AVERTISSEMENT An de réduire le risque de blessures, l'utilisateur doit lire et bien
comprendre le manuel.
ADVERTENCIA Para reducir el riesgo de lesiones, el usuario debe leer y entender el manual.
IMPORTANT
WARNING
SAFETY
INSTRUCTIONS
Read all safety warnings, instruc-
tions provided with this power tool. Failure to
follow all instructions listed below may result in
electric shock, re 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-oper-
ated (cordless) power tool.
• Keep work area clean and well lit. Cluttered or
dark areas invite accidents.
• Do not operate power tools in explosive atmo-
spheres, such as in the presence of ammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
• Keep children and bystanders away while operat-
ing a power tool. Distractions can cause you to lose
control.
• 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.
• 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 inuence 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 o-position before connecting to power
source and/or battery pack, picking up or carrying
the tool. Carrying power tools with your nger 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.
tions, illustrations and specica-
WORK AREA SAFETY
ELECTRICAL SAFETY
PERSONAL SAFETY
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 o. 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 aect 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 dierent 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 specied by the
manufacturer. A charger that is suitable for one type
of battery pack may create a risk of re when used
with another battery pack.
• Use power tools only with specically designated
battery packs. Use of any other battery packs may
create a risk of injury and re.
• 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 re.
• 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 damaged or modied. Damaged or modied batteries
may exhibit unpredictable behavior resulting in re,
explosion or risk of injury.
• Do not expose a battery pack or tool to re or
excessive temperature. Exposure to re or tem-
perature above 265°F (130°C) may cause explosion.
• Follow all charging instructions and do not charge
the battery pack or tool outside the temperature
range specied in the instructions. Charging
improperly or at temperatures outside the specied
range may damage the battery and increase the risk
of re.
2
• Have your power tool serviced by a qualied
WARNING
WARNING
PPE
C
US
repair person using only identical replacement
parts. This will ensure that the safety of the power
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
SERVICE
•
gasoline, solvents, or gas producing chemicals.
Do not use tool around spark, ame, 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 seal-
ants, 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 re, personal injury, and
product damage due to a short circuit, never
immerse your tool, battery pack or charger in
uid or allow a uid to ow inside them. Do not
place or store tool where it can fall or be pulled
into a tub or sink. Corrosive or conductive uids,
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.
• Spray area must be well ventilated to avoid
hazardous fumes build-up.
• Avoid spraying 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 compo-
nents 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.
Risk of re or explosion. Do not
spray ammable liquids such as
• 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.
•
construction activities contains chemicals known to
cause 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
lter out microscopic particles.
Some dust created by power sanding,
sawing, grinding, drilling, and other
SAVE THESE
INSTRUCTIONS
SYMBOLOGY
Volts
Direct Current
Read operator's manual
(PPE) according to the chemical
manufacturer's instructions.
Wear eye protection
Wear gloves
Do not spray ammable liquids
Cat. No. ..................................................... 2820-20
Volts.............................................................. 18 DC
Battery Type .................................................M18™
Charger Type................................................M18™
Recommended Ambient
Operating Temperature .................... 32°F to 125°F
Tank Capacity ..................................... 4 Gal. (15 L)
Flow Rate ................................... 0.10 to 1.13 GPM
Full Weight ..................................................... 55 lbs
Tank Only (Pesticide)........................... 49-16-28PS
Tank Only (Concrete)........................... 49-16-28CS
Tank Only (Water) ............................... 49-16-28WS
3
Wear personal protective equipment
UL Listing for Canada and U.S.
SPECIFICATIONS
WARNING
WARNING
WARNING
WARNING
FUNCTIONAL DESCRIPTION
1. Tank
2. Tank cap
3. Wand storage location
4. Carry handle
5. Spray wand
6. Trigger lock-on ^
7. Trigger handle ^
8. Trigger lock-o ^
9. Shoulder straps
10. Hose
2
1
Cat. No.
49-16-28PS
49-16-28CS
19
20
18
17
21
22
23
24
11. Tank hook receptacle
12. Waist strap
13. Adjustable nozzle ^
14. Nozzle holder
15. Battery compartment
16. Battery compartment latch
17. Tank latch
18. Flow rate dial
19. On/O switch
20. On/O light
21. Water nozzle *
22. Adjustable nozzle ^
23. Fan nozzle ^
24. Strainer
25. Tank hooks
26. Gallon markings
27. Liter markings
28. Drain cap
29. Measuring cup ¤
* 49-16-28WS only
^ 49-16-28PS and 49-16-28CS only ¤ 49-16-28PS only
29
16
3
25
8
7
6
5
4
15
28
Cat. No.
49-16-28WS
ASSEMBLY
Recharge only with the charger
cic charging instructions, read the operator’s
manual supplied with your charger and battery.
To remove the battery, push in the release buttons
and pull the battery pack away from the tool.
9
To insert the battery, slide the pack into the body
of the tool. Make sure it latches securely into place.
10
may be hazardous.
3
Connecting the Spray Wand to the Trigger
11
1. Insert the spray wand into the trigger
handle (1) until rmly seated.
2. Slide the nut onto the threaded coupling
and hand tighten securely (2).
3. Pull on the spray wand to be certain it is
properly secured.
4. Place the assembled trigger handle and
12
13
14
wand into one of the wand storage loca-
tions.
Select and screw on nozzle by job type. When using
the adjustable nozzle, adjust spray pattern as desired
by tightening/loosening the nozzle.
Connecting Water Supply or Nozzle
26
To attach water supply hose to the tool or
nozzle, push the quick connect tting and
tool/nozzle together (1). Pull on the connec-
27
tion to be certain it is properly secured. To
remove, pull the collar back to release (2).
When using the nozzle, adjust spray pattern
as desired by tightening/loosening the nozzle.
Ensure 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 user or damage tool.
A removable strainer prevents debris that can clog
or damage the pump from entering thetank. Label
tank contents accordingly during each use. Only
put recommended liquids in tank. Only use water in
water supply tank.
1. Ensure the battery door is closed securely.
2. Remove the tank from the base and
set on a level surface away from the
base to prevent exposing the base
to harsh chemicals.
3. Unscrew and remove the tank cap;
ensure strainer is in place.
4. Fill the tank (up to 4 gallons; do not
overll). Use the gallon markings on
the side of the tank as a guide.
5. Reinstall the tank cap.
6. Reinstall the tank.
4
specied for the battery. For spe-
Removing/Inserting the Battery
Always remove battery pack before
changing or removing accessories.
Only use accessories specically
recommended for this tool. Others
(Cat. No. 49-16-28PS, 49-16-28CS)
Connecting the Nozzles
(Cat. No. 49-16-28PS, 49-16-28CS)
Handle
(Cat. No. 49-16-28WS)
Filling the Tank
Before lling the tank, remove the
tank from the base.
2
1
1
2
1. Ensure the battery door is closed securely.
WARNING
WARNING
2. Slide tank hooks into base and seat tank into tank
reservoir in the base.
3. Secure tank to base with front and rear tank
latches; ensuring the tank is level, rmly seated,
and all seals are aligned.
the backpack to avoid strain.
1. Ensure tank is securely attached to base with front
and rear tank latches, tank cap is installed, and
battery door is latched.
2. Pick up the backpack by one of the shoulder
straps, slide your arms through each shoulder
strap.
3. With the sprayer on your back, tighten the shoulder
and waist straps until they t snugly and securely,
high on your back. Connect chest strap.
4. 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.
5. Be aware tank contents may shift during use and
movement, such as twisting or bending over.
Installing the Tank
When filled, the sprayer will be
heavy, take care when putting on
Putting on the Backpack
OPERATION
Select the desired ow rate from Low (1) to High
(5), depending on the job and the chemical manufacturer's instructions.
Flow
Rate
ment (PPE) according to the chemical manufacturer's instructions. Always wear eye protection.
Always ensure battery compartment latch is
securely closed before use.
Ensure trigger handle lock-on is not engaged
before turning ON tool.
1. Install the battery pack. Close and latch the battery
compartment.
2. To turn the sprayer ON, press the ON/OFF switch to "I".
The Power LED will light green.
3. To start the ow of liquid at the spray wand, pull
the trigger.
4. To stop the ow of liquid at the spray wand, release the trigger.
5. 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 o
the tool, then pull the trigger and point the tool down
until dripping stops.
Use trigger lock-on when spraying for an extended
period of time or when covering a large area.
1. To lock-on, pull the trigger and push in the lock-on
button.
2. To release the lock-on, pull and release the trigger.
NOTE: Ensure the trigger is not locked on before
turning the sprayer o to avoid accidental spraying
when the sprayer is restarted.
Trigger Lock-On
Adjusting the Flow Rate
2820-20PS
(Stream Nozzle)
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
To reduce the risk of injury, always
wear personal protective equip-
2820-20CS
(Stream Nozzle)
2820-20WS
(Open Flow)
Turning the Sprayer ON/OFF
Trigger Lock-On
(Cat. No. 49-16-28PS, 49-16-28CS)
2
Trigger Lock-O
Trigger Lock-O
(Cat. No. 49-16-28PS, 49-16-28CS)
To avoid accidental spraying, lock-o the trigger.
1. Press the lock-o toggle at the end of the trigger
(1).
2. Hook the lock-o tab onto the hook under the
trigger (2).
3. To release, push the tab back into the trigger.
5
1
APPLICATIONS
WARNING
WARNING
WARNING
Before using any chemicals and/
original manufacturer instructions. Read all
Safety Data Sheets (SDS) and container labels
provided with the chemical. Chemicals can cause
serious bodily injury, property damage, and/or
damage the tool. Wear personal protective equipment (PPE) according to the chemical manufac-
turer's instructions. Always wear eye protection.
1. Fill the tank and then install onto the base.
2. Put on the backpack and properly adjust the straps.
3. Turn on the tool.
4. Pull the trigger and begin sweeping the nozzle from
side to side, coating the desired surface evenly in
accordance with chemical manufacturer's instruc-
tions.
5. If desired, lock-on the trigger for extended use.
6. When done, release the trigger, turn o the tool,
remove the backpack, drain, and clean the tank.
or solutions, read and follow all
Spraying
(Cat. No. 49-16-28PS, 49-16-28CS)
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.
your tool, battery pack or charger in liquid or
allow a liquid to ow inside them. Do not use
bleach as a cleaning agent.
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 deter-
gents containing ammonia. Never use ammable or
combustible solvents around tools.
Keep electrical contact posts between bottom of tank
and base clean. WARNING! Remove battery pack
from tool before cleaning electrical contacts. Clean
contacts with a dry, clean cloth only.
To reduce the risk of personal injury and damage, never immerse
Cleaning
Cleaning Electrical Contacts
Tank Base
Supplying Water
1. Fill the tank with clean water and then install onto
the base.
2. Place tool near the job within range of water supply
hose.
3. Attach water supply hose with the quick connect
tting. Pull on the connection to be certain it is
properly secured.
3. To start water ow, turn on the tool.
4. Monitor water level in tank. When empty, turn o
tool, disconnect the hose, and rell tank. Don't run
tool when tank is empty.
5. When done, turn o the tool, disconnect hose,
drain, and clean the tank.
(Cat. No. 49-16-28WS)
MAINTENANCE
Keep 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 aect the tool
operation. Return the tool, battery pack, and charger
to a MILWAUKEE service facility for repair. After six
Maintaining Tool
Contacts
To reduce the risk of injury, always
ment (PPE) according to the chemical manufacturer's instructions. Always wear eye protection.
Draining and Cleaning the Tank, Hose,
If there is any liquid left in the tank after spraying,
the tank should be drained before cleaning. Do not
store chemicals in the tank. 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:
1. Ensure the battery door is closed securely.
2. Remove the tank from the base.
3. Empty the tank into a suitable container through
the ll area or by removing the drain cap and
lter. WARNING! Always wear personal protec-
tive equipment (PPE) according to the chemical
manufacturer's instructions. Always wear eye
protection.
6
wear personal protective equip-
and Spray Wand
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